EP3873658A1 - Verfahren zur herstellung von mikropartikeln, die mit einem aktivstoff beladen sind - Google Patents
Verfahren zur herstellung von mikropartikeln, die mit einem aktivstoff beladen sindInfo
- Publication number
- EP3873658A1 EP3873658A1 EP19790561.5A EP19790561A EP3873658A1 EP 3873658 A1 EP3873658 A1 EP 3873658A1 EP 19790561 A EP19790561 A EP 19790561A EP 3873658 A1 EP3873658 A1 EP 3873658A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- microparticles
- liquid
- substance
- aliphatic
- acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000011859 microparticle Substances 0.000 title claims abstract description 389
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 239000011149 active material Substances 0.000 title abstract 6
- 239000000126 substance Substances 0.000 claims abstract description 235
- 238000000034 method Methods 0.000 claims abstract description 170
- 239000000203 mixture Substances 0.000 claims abstract description 165
- 239000011148 porous material Substances 0.000 claims abstract description 92
- 239000007788 liquid Substances 0.000 claims description 320
- 239000013543 active substance Substances 0.000 claims description 240
- -1 polybutylene Polymers 0.000 claims description 197
- 229920000642 polymer Polymers 0.000 claims description 132
- 229920000728 polyester Polymers 0.000 claims description 97
- 239000000463 material Substances 0.000 claims description 92
- 239000002904 solvent Substances 0.000 claims description 89
- 239000000243 solution Substances 0.000 claims description 72
- 239000007787 solid Substances 0.000 claims description 71
- 239000002245 particle Substances 0.000 claims description 70
- 239000000178 monomer Substances 0.000 claims description 57
- 239000001993 wax Substances 0.000 claims description 57
- 229920003232 aliphatic polyester Polymers 0.000 claims description 54
- 239000003795 chemical substances by application Substances 0.000 claims description 47
- 239000003205 fragrance Substances 0.000 claims description 42
- OMOVVBIIQSXZSZ-UHFFFAOYSA-N [6-(4-acetyloxy-5,9a-dimethyl-2,7-dioxo-4,5a,6,9-tetrahydro-3h-pyrano[3,4-b]oxepin-5-yl)-5-formyloxy-3-(furan-3-yl)-3a-methyl-7-methylidene-1a,2,3,4,5,6-hexahydroindeno[1,7a-b]oxiren-4-yl] 2-hydroxy-3-methylpentanoate Chemical compound CC12C(OC(=O)C(O)C(C)CC)C(OC=O)C(C3(C)C(CC(=O)OC4(C)COC(=O)CC43)OC(C)=O)C(=C)C32OC3CC1C=1C=COC=1 OMOVVBIIQSXZSZ-UHFFFAOYSA-N 0.000 claims description 38
- 239000004480 active ingredient Substances 0.000 claims description 38
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 36
- 229930195729 fatty acid Natural products 0.000 claims description 36
- 239000000194 fatty acid Substances 0.000 claims description 36
- 239000000155 melt Substances 0.000 claims description 34
- 230000008569 process Effects 0.000 claims description 34
- 150000001875 compounds Chemical class 0.000 claims description 32
- 229920001577 copolymer Polymers 0.000 claims description 32
- 239000000839 emulsion Substances 0.000 claims description 32
- 229920000620 organic polymer Polymers 0.000 claims description 32
- 125000001931 aliphatic group Chemical group 0.000 claims description 29
- 238000000576 coating method Methods 0.000 claims description 29
- 239000011248 coating agent Substances 0.000 claims description 28
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 28
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 27
- 150000002148 esters Chemical group 0.000 claims description 27
- 150000004665 fatty acids Chemical class 0.000 claims description 27
- 150000002500 ions Chemical class 0.000 claims description 27
- 239000004629 polybutylene adipate terephthalate Substances 0.000 claims description 27
- 239000004626 polylactic acid Substances 0.000 claims description 27
- 229920001748 polybutylene Polymers 0.000 claims description 24
- 125000003118 aryl group Chemical group 0.000 claims description 23
- 238000002844 melting Methods 0.000 claims description 23
- 230000008018 melting Effects 0.000 claims description 22
- 239000007864 aqueous solution Substances 0.000 claims description 21
- 239000002537 cosmetic Substances 0.000 claims description 20
- 239000000047 product Substances 0.000 claims description 20
- 238000006116 polymerization reaction Methods 0.000 claims description 19
- 108090000623 proteins and genes Chemical class 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 239000000843 powder Substances 0.000 claims description 18
- 239000003599 detergent Substances 0.000 claims description 17
- 229920001282 polysaccharide Polymers 0.000 claims description 17
- 239000005017 polysaccharide Substances 0.000 claims description 17
- 102000004169 proteins and genes Human genes 0.000 claims description 17
- 239000002304 perfume Substances 0.000 claims description 15
- 229920006149 polyester-amide block copolymer Polymers 0.000 claims description 14
- 239000012459 cleaning agent Substances 0.000 claims description 13
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 13
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 12
- 239000006185 dispersion Substances 0.000 claims description 12
- 230000009477 glass transition Effects 0.000 claims description 12
- 229920002732 Polyanhydride Polymers 0.000 claims description 11
- 150000004756 silanes Chemical class 0.000 claims description 10
- 125000003545 alkoxy group Chemical group 0.000 claims description 9
- 239000012164 animal wax Substances 0.000 claims description 9
- 229920001515 polyalkylene glycol Polymers 0.000 claims description 9
- 239000012178 vegetable wax Substances 0.000 claims description 9
- 150000001491 aromatic compounds Chemical class 0.000 claims description 8
- 235000015872 dietary supplement Nutrition 0.000 claims description 7
- 235000013305 food Nutrition 0.000 claims description 7
- 229920000117 poly(dioxanone) Polymers 0.000 claims description 7
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 6
- 235000013311 vegetables Nutrition 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 238000013270 controlled release Methods 0.000 claims description 5
- 238000011049 filling Methods 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical class OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 3
- 238000004018 waxing Methods 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 150000004676 glycans Chemical class 0.000 claims 1
- 239000011159 matrix material Substances 0.000 abstract description 2
- 239000000284 extract Substances 0.000 description 92
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 62
- 239000003921 oil Substances 0.000 description 59
- 235000019198 oils Nutrition 0.000 description 58
- 229910001868 water Inorganic materials 0.000 description 53
- 238000011068 loading method Methods 0.000 description 48
- 125000004432 carbon atom Chemical group C* 0.000 description 29
- 229920001634 Copolyester Polymers 0.000 description 28
- 239000002253 acid Substances 0.000 description 27
- 229920002678 cellulose Chemical class 0.000 description 26
- 229920002451 polyvinyl alcohol Polymers 0.000 description 25
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 25
- ALRHLSYJTWAHJZ-UHFFFAOYSA-N 3-hydroxypropionic acid Chemical compound OCCC(O)=O ALRHLSYJTWAHJZ-UHFFFAOYSA-N 0.000 description 24
- 239000002270 dispersing agent Substances 0.000 description 24
- 150000003839 salts Chemical class 0.000 description 24
- 229910052799 carbon Inorganic materials 0.000 description 23
- 235000010980 cellulose Nutrition 0.000 description 23
- 239000012071 phase Substances 0.000 description 23
- NDPLAKGOSZHTPH-UHFFFAOYSA-N 3-hydroxyoctanoic acid Chemical compound CCCCCC(O)CC(O)=O NDPLAKGOSZHTPH-UHFFFAOYSA-N 0.000 description 22
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 22
- BSUNTQCMCCQSQH-UHFFFAOYSA-N triazine Chemical class C1=CN=NN=C1.C1=CN=NN=C1 BSUNTQCMCCQSQH-UHFFFAOYSA-N 0.000 description 22
- WHBMMWSBFZVSSR-UHFFFAOYSA-N 3-hydroxybutyric acid Chemical compound CC(O)CC(O)=O WHBMMWSBFZVSSR-UHFFFAOYSA-N 0.000 description 21
- 229920001610 polycaprolactone Polymers 0.000 description 21
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 20
- 239000001913 cellulose Chemical class 0.000 description 19
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 18
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 18
- REKYPYSUBKSCAT-UHFFFAOYSA-N 3-hydroxypentanoic acid Chemical compound CCC(O)CC(O)=O REKYPYSUBKSCAT-UHFFFAOYSA-N 0.000 description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 17
- 150000004804 polysaccharides Chemical class 0.000 description 16
- 235000018102 proteins Nutrition 0.000 description 16
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 15
- 239000003054 catalyst Substances 0.000 description 15
- 239000007789 gas Substances 0.000 description 15
- JKRDADVRIYVCCY-UHFFFAOYSA-N 2-hydroxyoctanoic acid Chemical class CCCCCCC(O)C(O)=O JKRDADVRIYVCCY-UHFFFAOYSA-N 0.000 description 14
- 238000002156 mixing Methods 0.000 description 14
- 229910052757 nitrogen Inorganic materials 0.000 description 14
- 239000007921 spray Substances 0.000 description 14
- 239000008307 w/o/w-emulsion Substances 0.000 description 14
- NYHNVHGFPZAZGA-UHFFFAOYSA-N 2-hydroxyhexanoic acid Chemical class CCCCC(O)C(O)=O NYHNVHGFPZAZGA-UHFFFAOYSA-N 0.000 description 13
- SJZRECIVHVDYJC-UHFFFAOYSA-N 4-hydroxybutyric acid Chemical compound OCCCC(O)=O SJZRECIVHVDYJC-UHFFFAOYSA-N 0.000 description 13
- 230000007935 neutral effect Effects 0.000 description 13
- 229920001223 polyethylene glycol Polymers 0.000 description 13
- KIHBGTRZFAVZRV-UHFFFAOYSA-N 2-hydroxyoctadecanoic acid Chemical class CCCCCCCCCCCCCCCCC(O)C(O)=O KIHBGTRZFAVZRV-UHFFFAOYSA-N 0.000 description 12
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 12
- 150000007513 acids Chemical class 0.000 description 12
- BTANRVKWQNVYAZ-UHFFFAOYSA-N butan-2-ol Chemical compound CCC(C)O BTANRVKWQNVYAZ-UHFFFAOYSA-N 0.000 description 12
- 239000006210 lotion Substances 0.000 description 12
- 239000001361 adipic acid Substances 0.000 description 11
- 235000011037 adipic acid Nutrition 0.000 description 11
- 239000011575 calcium Substances 0.000 description 11
- 239000006071 cream Substances 0.000 description 11
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Chemical class C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 description 11
- 239000004632 polycaprolactone Substances 0.000 description 11
- JRHWHSJDIILJAT-UHFFFAOYSA-N 2-hydroxypentanoic acid Chemical class CCCC(O)C(O)=O JRHWHSJDIILJAT-UHFFFAOYSA-N 0.000 description 10
- FMHKPLXYWVCLME-UHFFFAOYSA-N 4-hydroxy-valeric acid Chemical compound CC(O)CCC(O)=O FMHKPLXYWVCLME-UHFFFAOYSA-N 0.000 description 10
- 229940006015 4-hydroxybutyric acid Drugs 0.000 description 10
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 10
- 239000002202 Polyethylene glycol Substances 0.000 description 10
- 239000008186 active pharmaceutical agent Substances 0.000 description 10
- 229920013820 alkyl cellulose Polymers 0.000 description 10
- 150000004657 carbamic acid derivatives Chemical class 0.000 description 10
- 238000001035 drying Methods 0.000 description 10
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 10
- 210000004209 hair Anatomy 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 10
- 229920001519 homopolymer Polymers 0.000 description 10
- 239000002685 polymerization catalyst Substances 0.000 description 10
- 238000005507 spraying Methods 0.000 description 10
- HIXDQWDOVZUNNA-UHFFFAOYSA-N 2-(3,4-dimethoxyphenyl)-5-hydroxy-7-methoxychromen-4-one Chemical compound C=1C(OC)=CC(O)=C(C(C=2)=O)C=1OC=2C1=CC=C(OC)C(OC)=C1 HIXDQWDOVZUNNA-UHFFFAOYSA-N 0.000 description 9
- XXIKYCPRDXIMQM-UHFFFAOYSA-N Isopentenyl acetate Chemical compound CC(C)=CCOC(C)=O XXIKYCPRDXIMQM-UHFFFAOYSA-N 0.000 description 9
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 9
- 230000002378 acidificating effect Effects 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
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- 239000003960 organic solvent Substances 0.000 description 9
- 229920002959 polymer blend Polymers 0.000 description 9
- 238000003756 stirring Methods 0.000 description 9
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 8
- HPMGFDVTYHWBAG-UHFFFAOYSA-N 3-hydroxyhexanoic acid Chemical compound CCCC(O)CC(O)=O HPMGFDVTYHWBAG-UHFFFAOYSA-N 0.000 description 8
- POMQYTSPMKEQNB-UHFFFAOYSA-N 3-hydroxyoctadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)CC(O)=O POMQYTSPMKEQNB-UHFFFAOYSA-N 0.000 description 8
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 8
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 8
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 8
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 8
- NBBJYMSMWIIQGU-UHFFFAOYSA-N Propionic aldehyde Chemical compound CCC=O NBBJYMSMWIIQGU-UHFFFAOYSA-N 0.000 description 8
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 8
- 125000000217 alkyl group Chemical group 0.000 description 8
- FLKPEMZONWLCSK-UHFFFAOYSA-N diethyl phthalate Chemical compound CCOC(=O)C1=CC=CC=C1C(=O)OCC FLKPEMZONWLCSK-UHFFFAOYSA-N 0.000 description 8
- 239000000796 flavoring agent Substances 0.000 description 8
- MLFHJEHSLIIPHL-UHFFFAOYSA-N isoamyl acetate Chemical compound CC(C)CCOC(C)=O MLFHJEHSLIIPHL-UHFFFAOYSA-N 0.000 description 8
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 8
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 8
- 239000000725 suspension Substances 0.000 description 8
- DNIAPMSPPWPWGF-VKHMYHEASA-N (+)-propylene glycol Chemical compound C[C@H](O)CO DNIAPMSPPWPWGF-VKHMYHEASA-N 0.000 description 7
- NOOLISFMXDJSKH-KXUCPTDWSA-N (-)-Menthol Chemical compound CC(C)[C@@H]1CC[C@@H](C)C[C@H]1O NOOLISFMXDJSKH-KXUCPTDWSA-N 0.000 description 7
- YPFDHNVEDLHUCE-UHFFFAOYSA-N 1,3-propanediol Substances OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 7
- 229940035437 1,3-propanediol Drugs 0.000 description 7
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 7
- 229920000331 Polyhydroxybutyrate Polymers 0.000 description 7
- WNLRTRBMVRJNCN-UHFFFAOYSA-L adipate(2-) Chemical compound [O-]C(=O)CCCCC([O-])=O WNLRTRBMVRJNCN-UHFFFAOYSA-L 0.000 description 7
- 239000001099 ammonium carbonate Substances 0.000 description 7
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 description 7
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- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 7
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- 239000002243 precursor Substances 0.000 description 7
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- 230000005855 radiation Effects 0.000 description 7
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 7
- RKDVKSZUMVYZHH-UHFFFAOYSA-N 1,4-dioxane-2,5-dione Chemical compound O=C1COC(=O)CO1 RKDVKSZUMVYZHH-UHFFFAOYSA-N 0.000 description 6
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 6
- GOJUJUVQIVIZAV-UHFFFAOYSA-N 2-amino-4,6-dichloropyrimidine-5-carbaldehyde Chemical group NC1=NC(Cl)=C(C=O)C(Cl)=N1 GOJUJUVQIVIZAV-UHFFFAOYSA-N 0.000 description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
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- 108010010803 Gelatin Proteins 0.000 description 6
- GLZPCOQZEFWAFX-UHFFFAOYSA-N Geraniol Chemical compound CC(C)=CCCC(C)=CCO GLZPCOQZEFWAFX-UHFFFAOYSA-N 0.000 description 6
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- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 6
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- 230000008901 benefit Effects 0.000 description 6
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 6
- 239000012965 benzophenone Substances 0.000 description 6
- 238000009833 condensation Methods 0.000 description 6
- 230000005494 condensation Effects 0.000 description 6
- DMEGYFMYUHOHGS-UHFFFAOYSA-N cycloheptane Chemical compound C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 6
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 6
- 239000008273 gelatin Substances 0.000 description 6
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- 235000019322 gelatine Nutrition 0.000 description 6
- 235000011852 gelatine desserts Nutrition 0.000 description 6
- WTEVQBCEXWBHNA-JXMROGBWSA-N geranial Chemical compound CC(C)=CCC\C(C)=C\C=O WTEVQBCEXWBHNA-JXMROGBWSA-N 0.000 description 6
- WPFVBOQKRVRMJB-UHFFFAOYSA-N hydroxycitronellal Chemical compound O=CCC(C)CCCC(C)(C)O WPFVBOQKRVRMJB-UHFFFAOYSA-N 0.000 description 6
- 150000002576 ketones Chemical class 0.000 description 6
- 229910021645 metal ion Inorganic materials 0.000 description 6
- KVWWIYGFBYDJQC-UHFFFAOYSA-N methyl dihydrojasmonate Chemical compound CCCCCC1C(CC(=O)OC)CCC1=O KVWWIYGFBYDJQC-UHFFFAOYSA-N 0.000 description 6
- UAEPNZWRGJTJPN-UHFFFAOYSA-N methylcyclohexane Chemical compound CC1CCCCC1 UAEPNZWRGJTJPN-UHFFFAOYSA-N 0.000 description 6
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 6
- BARWIPMJPCRCTP-CLFAGFIQSA-N oleyl oleate Chemical compound CCCCCCCC\C=C/CCCCCCCCOC(=O)CCCCCCC\C=C/CCCCCCCC BARWIPMJPCRCTP-CLFAGFIQSA-N 0.000 description 6
- 229920000218 poly(hydroxyvalerate) Polymers 0.000 description 6
- 229920002792 polyhydroxyhexanoate Polymers 0.000 description 6
- 229920002795 polyhydroxyoctanoate Polymers 0.000 description 6
- 239000002861 polymer material Substances 0.000 description 6
- 229910052700 potassium Inorganic materials 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- CZCBTSFUTPZVKJ-UHFFFAOYSA-N rose oxide Chemical compound CC1CCOC(C=C(C)C)C1 CZCBTSFUTPZVKJ-UHFFFAOYSA-N 0.000 description 6
- 239000000523 sample Substances 0.000 description 6
- 238000006467 substitution reaction Methods 0.000 description 6
- 239000011593 sulfur Substances 0.000 description 6
- 229910052717 sulfur Inorganic materials 0.000 description 6
- 229920002554 vinyl polymer Polymers 0.000 description 6
- AFENDNXGAFYKQO-VKHMYHEASA-N (S)-2-hydroxybutyric acid Chemical compound CC[C@H](O)C(O)=O AFENDNXGAFYKQO-VKHMYHEASA-N 0.000 description 5
- VPVXHAANQNHFSF-UHFFFAOYSA-N 1,4-dioxan-2-one Chemical compound O=C1COCCO1 VPVXHAANQNHFSF-UHFFFAOYSA-N 0.000 description 5
- AGBXYHCHUYARJY-UHFFFAOYSA-N 2-phenylethenesulfonic acid Chemical compound OS(=O)(=O)C=CC1=CC=CC=C1 AGBXYHCHUYARJY-UHFFFAOYSA-N 0.000 description 5
- BUKOWKOPJSGGQK-UHFFFAOYSA-N 6-hydroxy caprylic acid Chemical compound CCC(O)CCCCC(O)=O BUKOWKOPJSGGQK-UHFFFAOYSA-N 0.000 description 5
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- CRDAMVZIKSXKFV-UHFFFAOYSA-N trans-Farnesol Natural products CC(C)=CCCC(C)=CCCC(C)=CCO CRDAMVZIKSXKFV-UHFFFAOYSA-N 0.000 description 1
- DKZBBWMURDFHNE-UHFFFAOYSA-N trans-coniferylaldehyde Natural products COC1=CC(C=CC=O)=CC=C1O DKZBBWMURDFHNE-UHFFFAOYSA-N 0.000 description 1
- BJIOGJUNALELMI-UHFFFAOYSA-N trans-isoeugenol Natural products COC1=CC(C=CC)=CC=C1O BJIOGJUNALELMI-UHFFFAOYSA-N 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- IMRYETFJNLKUHK-UHFFFAOYSA-N traseolide Chemical compound CC1=C(C(C)=O)C=C2C(C(C)C)C(C)C(C)(C)C2=C1 IMRYETFJNLKUHK-UHFFFAOYSA-N 0.000 description 1
- 150000003852 triazoles Chemical class 0.000 description 1
- IMFACGCPASFAPR-UHFFFAOYSA-N tributylamine Chemical compound CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 description 1
- 229960003500 triclosan Drugs 0.000 description 1
- WKSPQBFDRTUGEF-UHFFFAOYSA-N tridec-2-enenitrile Chemical compound CCCCCCCCCCC=CC#N WKSPQBFDRTUGEF-UHFFFAOYSA-N 0.000 description 1
- DBWSGRFEGVADLQ-UHFFFAOYSA-N trideca-3,12-dienenitrile Chemical compound C=CCCCCCCCC=CCC#N DBWSGRFEGVADLQ-UHFFFAOYSA-N 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 150000005691 triesters Chemical class 0.000 description 1
- NKLYMYLJOXIVFB-UHFFFAOYSA-N triethoxymethylsilane Chemical compound CCOC([SiH3])(OCC)OCC NKLYMYLJOXIVFB-UHFFFAOYSA-N 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- TUQLLQQWSNWKCF-UHFFFAOYSA-N trimethoxymethylsilane Chemical compound COC([SiH3])(OC)OC TUQLLQQWSNWKCF-UHFFFAOYSA-N 0.000 description 1
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 1
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 description 1
- 229940096522 trimethylolpropane triacrylate Drugs 0.000 description 1
- VXYADVIJALMOEQ-UHFFFAOYSA-K tris(lactato)aluminium Chemical compound CC(O)C(=O)O[Al](OC(=O)C(C)O)OC(=O)C(C)O VXYADVIJALMOEQ-UHFFFAOYSA-K 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- HETFMJQWNWIBPN-UHFFFAOYSA-N undec-2-enenitrile Chemical compound CCCCCCCCC=CC#N HETFMJQWNWIBPN-UHFFFAOYSA-N 0.000 description 1
- 229960002703 undecylenic acid Drugs 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
- WCTNXGFHEZQHDR-UHFFFAOYSA-N valencene Natural products C1CC(C)(C)C2(C)CC(C(=C)C)CCC2=C1 WCTNXGFHEZQHDR-UHFFFAOYSA-N 0.000 description 1
- 235000016788 valerian Nutrition 0.000 description 1
- 229940038779 valerian root extract Drugs 0.000 description 1
- 235000017468 valeriana Nutrition 0.000 description 1
- 239000001192 valeriana officinalis l. rhizome/root Substances 0.000 description 1
- FGQOOHJZONJGDT-UHFFFAOYSA-N vanillin Natural products COC1=CC(O)=CC(C=O)=C1 FGQOOHJZONJGDT-UHFFFAOYSA-N 0.000 description 1
- 235000012141 vanillin Nutrition 0.000 description 1
- RGVQNSFGUOIKFF-UHFFFAOYSA-N verdyl acetate Chemical compound C12CC=CC2C2CC(OC(=O)C)C1C2 RGVQNSFGUOIKFF-UHFFFAOYSA-N 0.000 description 1
- 239000010679 vetiver oil Substances 0.000 description 1
- ZTWTYVWXUKTLCP-UHFFFAOYSA-N vinylphosphonic acid Chemical compound OP(O)(=O)C=C ZTWTYVWXUKTLCP-UHFFFAOYSA-N 0.000 description 1
- NLVXSWCKKBEXTG-UHFFFAOYSA-N vinylsulfonic acid Chemical compound OS(=O)(=O)C=C NLVXSWCKKBEXTG-UHFFFAOYSA-N 0.000 description 1
- 239000001846 viola odorata l. leaf absolute Substances 0.000 description 1
- 239000011782 vitamin Substances 0.000 description 1
- 235000013343 vitamin Nutrition 0.000 description 1
- 229940088594 vitamin Drugs 0.000 description 1
- 229930003231 vitamin Natural products 0.000 description 1
- 239000001717 vitis vinifera seed extract Substances 0.000 description 1
- 235000020234 walnut Nutrition 0.000 description 1
- 239000002569 water oil cream Substances 0.000 description 1
- 239000003021 water soluble solvent Substances 0.000 description 1
- 229920003170 water-soluble synthetic polymer Polymers 0.000 description 1
- 235000021119 whey protein Nutrition 0.000 description 1
- 235000020334 white tea Nutrition 0.000 description 1
- 239000009637 wintergreen oil Substances 0.000 description 1
- 229920001285 xanthan gum Polymers 0.000 description 1
- QRPLZGZHJABGRS-UHFFFAOYSA-N xi-5-Dodecanolide Chemical compound CCCCCCCC1CCCC(=O)O1 QRPLZGZHJABGRS-UHFFFAOYSA-N 0.000 description 1
- WGPCZPLRVAWXPW-UHFFFAOYSA-N xi-Dihydro-5-octyl-2(3H)-furanone Chemical compound CCCCCCCCC1CCC(=O)O1 WGPCZPLRVAWXPW-UHFFFAOYSA-N 0.000 description 1
- PHXATPHONSXBIL-UHFFFAOYSA-N xi-gamma-Undecalactone Chemical compound CCCCCCCC1CCC(=O)O1 PHXATPHONSXBIL-UHFFFAOYSA-N 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
- BLGXFZZNTVWLAY-SCYLSFHTSA-N yohimbine Chemical compound C1=CC=C2C(CCN3C[C@@H]4CC[C@H](O)[C@@H]([C@H]4C[C@H]33)C(=O)OC)=C3NC2=C1 BLGXFZZNTVWLAY-SCYLSFHTSA-N 0.000 description 1
- 229960000317 yohimbine Drugs 0.000 description 1
- AADVZSXPNRLYLV-UHFFFAOYSA-N yohimbine carboxylic acid Natural products C1=CC=C2C(CCN3CC4CCC(C(C4CC33)C(O)=O)O)=C3NC2=C1 AADVZSXPNRLYLV-UHFFFAOYSA-N 0.000 description 1
- 239000005019 zein Substances 0.000 description 1
- 229940093612 zein Drugs 0.000 description 1
- VNTDZUDTQCZFKN-UHFFFAOYSA-L zinc 2,2-dimethyloctanoate Chemical compound [Zn++].CCCCCCC(C)(C)C([O-])=O.CCCCCCC(C)(C)C([O-])=O VNTDZUDTQCZFKN-UHFFFAOYSA-L 0.000 description 1
- 239000011667 zinc carbonate Substances 0.000 description 1
- 235000004416 zinc carbonate Nutrition 0.000 description 1
- 229910000010 zinc carbonate Inorganic materials 0.000 description 1
- 150000003752 zinc compounds Chemical class 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 229940043810 zinc pyrithione Drugs 0.000 description 1
- GAWWVVGZMLGEIW-GNNYBVKZSA-L zinc ricinoleate Chemical compound [Zn+2].CCCCCC[C@@H](O)C\C=C/CCCCCCCC([O-])=O.CCCCCC[C@@H](O)C\C=C/CCCCCCCC([O-])=O GAWWVVGZMLGEIW-GNNYBVKZSA-L 0.000 description 1
- 229940100530 zinc ricinoleate Drugs 0.000 description 1
- PICXIOQBANWBIZ-UHFFFAOYSA-N zinc;1-oxidopyridine-2-thione Chemical compound [Zn+2].[O-]N1C=CC=CC1=S.[O-]N1C=CC=CC1=S PICXIOQBANWBIZ-UHFFFAOYSA-N 0.000 description 1
- RXVCGIUUXRUUMT-UHFFFAOYSA-N zinc;ethyl hexanoate Chemical compound [Zn+2].CCCCCC(=O)OCC RXVCGIUUXRUUMT-UHFFFAOYSA-N 0.000 description 1
- CHJMFFKHPHCQIJ-UHFFFAOYSA-L zinc;octanoate Chemical compound [Zn+2].CCCCCCCC([O-])=O.CCCCCCCC([O-])=O CHJMFFKHPHCQIJ-UHFFFAOYSA-L 0.000 description 1
- NHXVNEDMKGDNPR-UHFFFAOYSA-N zinc;pentane-2,4-dione Chemical compound [Zn+2].CC(=O)[CH-]C(C)=O.CC(=O)[CH-]C(C)=O NHXVNEDMKGDNPR-UHFFFAOYSA-N 0.000 description 1
- 150000003755 zirconium compounds Chemical class 0.000 description 1
- PFSTYGCNVAVZBK-KVDYQJCMSA-N α-sinensal Chemical compound O=CC(\C)=C/CCC(/C)=C/C\C=C(\C)C=C PFSTYGCNVAVZBK-KVDYQJCMSA-N 0.000 description 1
- NOPLRNXKHZRXHT-PVMFERMNSA-N β-sinensal Chemical compound O=CC(\C)=C/CCC(/C)=C/CCC(=C)C=C NOPLRNXKHZRXHT-PVMFERMNSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/02—Making microcapsules or microballoons
- B01J13/20—After-treatment of capsule walls, e.g. hardening
- B01J13/203—Exchange of core-forming material by diffusion through the capsule wall
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/26—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests in coated particulate form
- A01N25/28—Microcapsules or nanocapsules
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
- A61K8/11—Encapsulated compositions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
- A61K8/85—Polyesters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
- A61K8/86—Polyethers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
- A61K8/88—Polyamides
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/14—Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
- A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
- A61K9/1605—Excipients; Inactive ingredients
- A61K9/1617—Organic compounds, e.g. phospholipids, fats
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/14—Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
- A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
- A61K9/1605—Excipients; Inactive ingredients
- A61K9/1629—Organic macromolecular compounds
- A61K9/1641—Organic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyethylene glycol, poloxamers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q19/00—Preparations for care of the skin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/02—Making microcapsules or microballoons
- B01J13/20—After-treatment of capsule walls, e.g. hardening
- B01J13/22—Coating
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/50—Perfumes
- C11D3/502—Protected perfumes
- C11D3/505—Protected perfumes encapsulated or adsorbed on a carrier, e.g. zeolite or clay
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/10—General cosmetic use
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
- A61K2800/56—Compounds, absorbed onto or entrapped into a solid carrier, e.g. encapsulated perfumes, inclusion compounds, sustained release forms
Definitions
- the present invention relates to methods for producing microparticles which are loaded with at least one organic, low molecular weight active substance, in particular a method for loading microparticles with at least one organic, low molecular weight active substance and a method for sealing with at least one organic, microparticles loaded with low molecular weight active substance.
- the invention also relates to compositions of microparticles loaded with at least one low molecular weight active substance and their use.
- Microcapsules are used variously as carriers for active substances, for example for crop protection active substances, pharmaceutical active substances, fragrance and aroma substances, but also for reactive substances or catalysts for technical applications. They typically comprise a polymer material that encases the material to be encapsulated. The main advantages of such a formulation are:
- porous microparticles which consist of a sponge-like polymer material and which can be loaded with active substances.
- EP 467528 describes porous polymeric carrier particles with average particle sizes up to 250 ⁇ m and pores on their surface.
- the porous polymeric carrier particles are produced by suspension polymerization of styrene and a polyester from maleic anhydride / phthalic anhydride / propylene glycol in the presence of pore-forming substances.
- the particles are suggested for enzymes, catalysts and bacteria.
- WO 201 1/088229 describes porous microparticles made from biodegradable polymers, for example poly (lactide-co-glycolide) (PLGA), which contain an ionic species in the pores, for example an inorganic salt of a polyvalent ion, which is suitable for the Bind active substance.
- PLGA poly (lactide-co-glycolide)
- the pores are closed by heating.
- WO 2015/070172 describes porous microparticles made of biodegradable polymers, the pores of which as the active substance are a biologically active polymer, e.g. a protein, a lipoprotein, a proteoglycan or a nucleic acid, as well as an ionic biopolymer, especially an ionic polysaccharide, and an agent for modifying the pH, e.g. Magnesium carbonate or zinc carbonate included.
- the ionic biopolymer forms an ionic complex with the biologically active polymer.
- the pores are closed by heating.
- the methods described in the abovementioned prior art teach the loading of porous microparticles with biologically active polymers which are to be released quickly at the point of use.
- the continuous release of the active substance over a longer period of time is irrelevant. In fact, such a release is not desirable.
- biologically active polymers are very hydrophilic.
- the loading of the porous microparticles with low molecular weight substances or even hydrophobic substances such as aroma chemicals or crop protection agents is not described.
- the loaded microparticles are heated after the loading for a longer period of time, generally from several hours to several days, in order to close the pores and to prevent the active substance from escaping prematurely. This regularly leads to stress on the active ingredient and can lead to undesirable degradation of the active ingredient.
- the production of the microparticles is complex, since the porous microparticles generally have to be treated with a substance which binds the actual active substance.
- WO 2018/065481 describes a method for filling porous microparticles with an aroma chemical by suspending the microparticles in a liquid aroma chemical or solution of the aroma chemical.
- the closure is also done here by heating, which can lead to a breakdown of the active substance.
- the release characteristics are not always satisfactory.
- the object of the invention is therefore to provide a method for loading porous microparticles with active substances, in which a thermal treatment of the loaded microparticles can be avoided.
- the loaded microparticles should only release the active substance after a latency period.
- the loaded microparticles should be easy to produce and inert to the active ingredient.
- the present invention therefore relates to a method for producing microparticles which are loaded with at least one low molecular weight, organic active substance, the microparticles being built up from an organic, polymeric wall material and having at least one cavity in the interior in the unloaded state which is connected to the surface of the microparticles via pores, taking one of the following measures (a), (b), (c) or (d):
- liquid (1a) consisting essentially of:
- the unloaded microparticles are washed with a liquid (1 b) consisting essentially of:
- a non-polymerisable substance A which is solid at room temperature and which is present in the liquid as a melt, emulsified, suspended or dissolved, and
- a substance which closes the pores of the loaded microparticles is applied to the surface of the microparticles which are already loaded with at least one low molecular weight, organic active substance.
- the unloaded microparticles are loaded with the at least one low molecular weight, organic active substance by impregnating the microparticles with a liquid (1 d) which contains the active substance.
- Measures (a), (b), (c) and (d) include the active substance in the microparticles after filling.
- the substances (A), (B) and (C) used in measures (a), (b) and (c) form - in the case of substances (B) and (C) after their consolidation by polymerization or by treatment with the polyvalent metal ions - a solid matrix that includes the active substance.
- the inclusion is achieved by closing the pores with one on the surface of the pores applied substance, in particular by creating a solid layer on the surface of the loaded microparticles, which leads to a closure of the pores.
- the present invention also relates to a method for closing microparticles which are loaded with at least one low molecular weight, organic active substance, the microparticles being composed of an organic, polymeric wall material and, in the unloaded state, at least one cavity inside have, which is connected via pores to the surface of the microparticles, wherein at least one substance is applied to the surface of the microparticles loaded with the low molecular weight, organic active substance, which closes the pores of the loaded microparticles, in particular by placing on the surface - surface of the loaded microparticles creates a solid coating.
- compositions of microparticles filled with at least one active ingredient obtainable by a process according to the invention and their use, in particular for use in an agent selected from perfumes, washing and cleaning agents, cosmetic agents, personal care agents, Hygiene articles, foods, food supplements, fragrance dispensers and fragrances.
- the present invention relates to agents which contain a composition according to the invention of microparticles filled with at least one active substance, and to their use, in particular for the controlled release of low molecular weight active substances and especially for the controlled release of aroma chemicals.
- the impregnated microparticles can be impregnated with other, different methods.
- impregnation of the unloaded microparticles can be achieved in an efficient manner by using a liquid containing the active substance, for example the aforementioned liquids (1 a), (1 b), (1 c) or (1 d), in fine distributed form, especially in droplet form on the unloaded microparticles.
- the liquid droplets are quickly absorbed by the unloaded microparticles.
- the present invention therefore also relates to a method for producing microparticles which are loaded with at least one low molecular weight, organic active substance, the microparticles being built up from an organic, polymeric wall material and having at least one cavity in the interior in the unloaded state. sen, which is connected via pores to the surface of the microparticles, the unloaded microparticles being impregnated with a liquid containing the active substance, in particular the liquid (1d), by the liquid being in finely divided form, ie in droplet form or in the form of a spray onto which unloaded microparticles are applied.
- This method is also referred to below as method (s).
- microparticles loaded with the active ingredient obtained by method (e) can, if desired, be obtained by a prior art method, i.e. close by heating the microparticles to a temperature above the melting temperature or, if the wall material has no melting point, above the glass transition temperature. If desired, the microparticles loaded with the active substance obtained according to method e) can also be sealed by one of the measures (a), (b), (c) described here or in particular by measure (d), by a substance is applied to the surface of the loaded microparticles which closes the pores of the loaded microparticles.
- the invention has a number of advantages, some or all of which are achieved.
- microparticles that are used as the starting material are simple and inexpensive to produce.
- the method of loading is very versatile with regard to the starting materials to be used and is particularly suitable for a large number of low molecular weight active substances.
- a thermal treatment of the loaded microparticles to close the pores is not necessary, since measures (a), (b), (c) and (d) effectively enclose the low molecular weight active substance in the microparticles.
- microparticles loaded with the active substance can be stored for a longer period of time without a significant loss of active substance.
- the release characteristics of the active substance can be specifically controlled by the choice of the respective substance A, B, C or D. By choosing the wall material and, if necessary, fabrics A, B, C or
- the microparticles can be designed so that they are biodegradable.
- the release of the active substance can be specifically controlled in a simple manner.
- the active ingredient is an aroma chemical or a mixture of aroma chemicals, the aroma profile is generally retained.
- the present invention relates in particular to the following items 1 to 50:
- microparticles which are loaded with at least one low molecular weight, organic active substance, the microparticles being made up of an organic, polymeric wall material and, in the unloaded state, having at least one cavity in the interior which communicates with the pores Surface of the microparticles is connected by one of the methods A, B or C.
- microparticles which are loaded with at least one low molecular weight, organic active substance, the microparticles being made up of an organic, polymeric wall material and, in the unloaded state, having at least one cavity inside which is connected to the Surface of the microparticles is connected by method D.
- microparticles which are loaded with at least one low molecular weight, organic active substance, the microparticles being made up of an organic, polymeric wall material and, in the unloaded state, having at least one cavity in the interior which communicates with the pores Surface of the microparticles is connected, wherein the unloaded microparticles are impregnated with a liquid containing the active substance by applying the liquid in finely divided form, in particular droplet form, to the unloaded microparticles.
- non-polymerisable substance A being selected from organic polymers which melt at a temperature in the range from 30 to 150 ° C., organic polymers which can be solubilized in the solvent which may be present, and Waxes and their mixtures.
- the liquid (1 a) used is a melt or solution which essentially consists of at least one active substance and at least one organic polymer and / or at least one wax, the wax or the organic polymer in the liquid are present in the active substance in molten form or in the form of a solution.
- Process according to item 4, wherein the non-polymerizable substance A is selected from water-soluble polymers.
- Process according to item 7, wherein the liquid (1 a) used is a mixture of an aqueous solution or emulsion of the water-soluble polymer and the active substance.
- Method according to one of the items 1 or 4 to 8 wherein in the liquid (1 a) the mass ratio of the at least one active substance to the non-polymerizable substance A in the range from 99: 1 to 10: 90, in particular in the range from 95: 5 to 20: 80.
- the process according to item 1, wherein the polymerizable substance B is selected from silanes containing ethylenically unsaturated monomers, hydroxyl or alkoxyl groups and oxidatively polymerizable aromatic compounds.
- the liquid (1 b) used is an emulsion or solution which essentially consists of at least one active substance and at least one polymerizable substance B, the polymerizable substance B in the liquid in molten form or are present in the form of a solution in the active substance.
- the liquid (1 d) consists essentially of at least one liquid active substance.
- At least one film-forming substance D which is present in the liquid as a melt, emulsified, dispersed or dissolved, and
- the film-forming substance D is selected from organic polymers which melt at a temperature in the range from 30 to 150 ° C., organic polymers which can be solubilized in the solvent which may be present in the liquid (2d) and / or are dispersible, and waxing.
- liquid (2d) used is a melt or solution which essentially consists of at least one organic polymer and / or at least one wax, the wax or the organic polymer being in the liquid in melted or in Form of a solution, dispersion or emulsion in the solvent.
- film-forming substance D is selected from vegetable or animal waxes, polyalkylene glycols, homo- and copolymers of vinyl acetate and mixtures thereof.
- the liquid (2d) used is a solution, dispersion or emulsion of the water-solubilizable and / or dispersible polymer.
- the film-forming substance D is selected from a polymerizable substance and the film formation comprises a polymerization of the substance D.
- the polymerizable substance is selected from ethylenically unsaturated monomers, hydroxyl- or alkoxyl-containing silanes and oxidatively polymerizable aromatic compounds.
- a coating is produced on the surface of the microparticles by powdering the microparticles with a finely divided solid and then causing film formation on the surface of the microparticles.
- a coating is produced on the surface of the microparticles by separating a volatile substance from the gas phase on the surface of the microparticles and converting this from the surface into a solid by chemical reaction. 25. The method according to any one of the preceding items, wherein the
- Microparticles are sprayed or dripped with the respective liquid or the microparticles are suspended in the respective liquid.
- step (d2) is carried out in such a way that the thickness of the coating obtained is on average in the range from 0.01 to 1.5 times the average radius of the microparticles.
- the wall material contains at least one polymer with a glass transition temperature or a melting point in the range from 45 to 140 ° C.
- the wall material having a solubility in dichloromethane of at least 50 g / l at 25 ° C.
- polymeric wall material comprises at least one aliphatic-aromatic polyester.
- aliphatic-aromatic polyester is selected from polybutylene azealate-co-butylene terephthalate (PBAzeT), polybutylene brassylate-co-butylene terephthalate (PBBrasT), polybutylene adipate terephthalate (PBAT), polybutylene terephthalate (Pereze) pate Polybutylene succinate terephthalate (PBST).
- PBAzeT polybutylene azealate-co-butylene terephthalate
- PBBrasT polybutylene brassylate-co-butylene terephthalate
- PBAT polybutylene adipate terephthalate
- Pereze polybutylene terephthalate
- the wall material contains, in addition to the aliphatic-aromatic polyester, at least one further polymer which is different from aliphatic-aromatic polyesters and which is selected in particular from aliphatic polyesters, polyanhydrides, Polyester amides, modified polysaccharides and proteins.
- the further polymer being selected from polymerized hydroxycarboxylic acids, aliphatic-aliphatic polyesters, polylactones, poly (p-dioxanones), polyanhydrides and polyesteramides.
- the further polymer being selected from polylactic acid and aliphatic poly-C5-Ci2-lactones.
- the further polymer being selected from aliphatic-aliphatic polyesters and polyhydroxy fatty acids.
- the active substance being selected from aroma chemicals, organic crop protection active substances, organic pharmaceutical active substances, cosmetic active substances and active substances for use in construction chemicals.
- the active substance being an aroma chemical which is liquid at 22 ° C. and 1013 mbar or a liquid at 22 ° C. and
- composition of microparticles filled with at least one active substance obtainable by a method according to one of the preceding objects.
- composition according to item 44 containing the active substance in a total amount of 5 to 75% by weight based on the total weight of the loaded microparticles.
- composition according to one of the items 44 or 45 in the form of a powder.
- Agent according to item 47 the agent being selected from perfumes, detergents, cleaning agents, cosmetic agents, personal care agents, hygiene articles, foods, nutritional supplements, fragrance dispensers and fragrances.
- composition according to one of the items 44 to 46 for use in an agent selected from perfumes, washing and cleaning agents, cosmetic agents, personal care agents, hygiene articles, foods, food supplements, fragrance dispensers and fragrances.
- composition according to one of the items 44 to 46 for the controlled delivery of active substances.
- the term “essentially consisting of” is understood in relation to the liquids (1 a), (1 b), (1c) and (1d) in such a way that the sum of the components is more than 80% by weight, more preferably at least 90% by weight, more preferably at least 95% by weight, more preferably at least 98% by weight, more preferably at least 99% by weight, more preferably at least 99.5% by weight, more preferably at least 99.9 % By weight, based on the total weight of the liquid.
- An active substance is understood by the person skilled in the art to be chemical compounds which trigger a physiological effect on living beings and plants, and substances which produce a chemical effect in inanimate nature or catalyze a chemical reaction.
- active substances are aroma chemicals, organic crop protection active substances, organic pharmaceutical active substances, cosmetic active substances and active substances for applications in the construction sector, so-called construction chemicals, in particular catalysts for products in the construction sector, e.g. Crosslinking or polymerization catalysts.
- low molecular weight organic active substance refers to organic chemical compounds with a defined molecular weight Mn, which is generally below 1000 daltons and typically in the range from 80 to ⁇ 1000 daltons and in particular in the range from 100 to 500 daltons .
- the “molecular weight Mn” or “molar mass Mn” stands for the number average of the molecular weight or molar mass.
- the “molecular weight Mw” or “molar mass Mw” stands for the mass average of the molecular weight or molar mass.
- polydispersity is the ratio of weight average to number average, ie the quotient Mw / Mn.
- room temperature denotes a temperature of 22 ° C.
- biodegradable means that the substance in question, here the unfilled microparticles, in the test of the OECD Guideline 301 B from 1992 (measurement of the C0 2 development during composting in a mineral sludge and comparison with the theoretical maximum possible C0 2 development) after 28 days and 25 ° C a biological degradation of at least 5%, in particular we least 10%, and especially at least 20%.
- the unloaded microparticles intended for impregnation are constructed from an organic polymer material and have openings, so-called pores, on the particle surface. These pores are connected to one or more cavities in the interior of the microparticles, so that the respective liquids (1a), (1 b), (1 c) and (1 d) when impregnating the microparticles through the pores into the cavity can penetrate. In this way, the microparticles are loaded with the active substance contained in the liquids.
- the microparticles are treated with the respective liquid (1a), (1b), (1c) or (1d) in such a way that the hollow space present in the unfilled microparticles with the respective liquid is largely or completely filled and consequently loaded with the active substance.
- the walls of these cavities are formed by the organic polymer material.
- the organic polymer material encloses the voids present in the microparticles and connected to the pores and is therefore also referred to as polymeric wall material.
- these cavities contain a gas or gas mixture, typically air, CO2 or an inert gas such as nitrogen or argon, which, when the unloaded microparticles are impregnated with the respective liquid (1a), (1b), (1c) or (1 d) is largely or completely suppressed.
- the microparticles have one or more cavities in their interior. In the case of several cavities, the cavities can be separated from one another by the polymeric wall material or can be connected to one another.
- the microparticles provided for loading have a multiplicity of cavities connected to one another, ie a network of cavities, which are connected to the pores in the surface of the microparticles.
- microparticle means that the particles have dimensions in the micrometer range, ie below 1000 gm, in particular below 800 gm and especially below 600 pm. The value given here is the value below which 90 vol.% Of particles contained in a sample fall below, which is also referred to as the D [v, 09] value. Typically, at least 90% by volume of the microparticles intended for loading have dimensions of at least 1 pm, in particular at least 2 pm and especially at least 5 pm (so-called D [v, 01] value).
- the microparticles provided for impregnation or loading preferably have an average particle diameter, i.e. ad [4,3] value from 1 to 600 pm, in particular from 5 to 500 pm and especially from 10 to 400 pm.
- the average particle diameter D [4,3] is 1 to ⁇ 100 pm, in particular 2 to 50 pm, especially 5 to 30 pm.
- the average particle diameter D [4.3] is 30 to 600 pm, in particular 50 to 500 pm and especially 100 to 400 pm.
- the microparticles provided for loading preferably have a Sauter diameter D [3.2] value of 0.2 to 400 pm, in particular 2.5 to 250 pm and especially 5 to 200 pm.
- the average particle diameter D [4,3] is 1 to ⁇ 100 pm, in particular 2 to 50 pm, especially 5 to 30 pm.
- the average particle diameter D [4,3] is 30 to 600 pm, in particular 50 to 500 pm and especially 100 to 400 pm.
- the microparticles provided for impregnation preferably have a D [v, 05] value of 0.5 to 500 pm, in particular 4 to 300 pm and especially 10 to 300 pm.
- the average particle diameter D [4,3] is 1 to ⁇ 100 pm, in particular 2 to 50 pm, especially 5 to 30 pm.
- the average particle diameter D [4,3] is 30 to 600 pm, in particular 50 to 500 pm and especially 100 to 400 pm.
- D [v, 05], D [v, 09], D [4,3] and D [3,2] on the particle size distributions determined by static laser light scattering according to ISO 13320: 2009 on samples of the microparticles.
- the abbreviation SLS is also used below for the term "static laser light scattering according to ISO 13320: 2009".
- the value means D [v, 01] that 10% by volume of the particles of the measured sample have a particle diameter below the value given as D [v, 01].
- the value D [v, 05] means that 50% by volume of the particles of the measured sample have a particle diameter below the value given as D [v, 05]; and the value D [v, 09] means that 90% by volume of the particles of the measured sample have a particle diameter below the value given as D [v, 09].
- the value D [4, 3] stands for the volume-weighted mean determined by means of SLS, which is also referred to as the De Brouckere mean and which corresponds to the mass mean for the particles according to the invention.
- the value D [3, 2] stands for the surface-weighted mean determined by means of SLS, which is also referred to as the Sauter diameter.
- the microparticles provided for loading are preferably regularly shaped particles, in particular spherically shaped particles.
- regularly shaped means that the surface of the particles, apart from the pores, has no major depressions in the wall material or elevations made of wall material.
- spherical means that the particles approximately have the shape of an ellipsoid of revolution and, in particular, spherical, with the ratio of the longest axis through the center of the particle to the shortest axis through the center of the particle not exceeding a value of 2 and is in particular in the range from 1: 1 to 1.5: 1.
- the microparticles intended for loading are, in particular, spherical microparticles which preferably have an average particle diameter of D [4.3] of 1 to 600 ⁇ m, in particular 5 to 500 ⁇ m and especially 10 to 400 ⁇ m.
- the average particle diameter D [4,3] of the spherical microparticles is 1 to ⁇ 100 pm, in particular 2 to 50 pm, specifically 5 to 30 pm.
- the average particle diameter D [4,3] is 30 to 600 pm, in particular 50 to 500 pm and especially 100 to 400 pm.
- the microparticles provided for loading preferably have at least 10, preferably at least 20 pores on their surface.
- the diameter of the pores is preferably in the range from 1/5000 to 1/5 of the average particle diameter.
- the diameter of these pores is preferably at least 20 nm, in particular at least 50 nm, particularly preferably at least 100 nm and especially at least 200 nm.
- the diameter of these pores will generally not exceed 20 pm, in particular 10 pm and is in particular Range from 100 nm to 20 pm and especially 200 nm to 10 pm, depending on the respective average particle diameter D [4,3].
- microparticles provided for loading which have an average particle diameter D [4,3] in the range from 10 to 600 pm, in particular from 30 to 500 pm and especially from 50 to 400 pm, at least 80% of those Microparticles whose particle diameter does not deviate by more than 20% from the average particle diameter of the microparticles of the composition each have on average at least 10 pores, the diameter of which is in the range from 1/5000 to 1/5 of the average particle diameter and furthermore the diameter each of these pores is at least 20 nm, in particular at least 50 nm, particularly preferably at least 100 nm and especially at least 200 nm.
- the diameter of these pores will generally not exceed 20 pm, in particular 10 pm, and is in particular in the range from 100 nm to 20 pm and especially 200 nm to 10 pm.
- the pore diameters given here can be determined using scanning electron microscopy (Phenom Pro X) using the following method. Various close-ups are taken for this purpose and these are subsequently measured automatically with the ProSuit (FibreMetric) software from Phenom. The pores of a selected area of a particle are recognized by the contrast difference and their areas are automatically measured. Assuming that the surfaces are circular, the diameter is calculated for each surface. (Sample size 100 pores).
- those microparticles are taken into account whose particle diameter does not differ by more than 20% from the average particle diameter of the composition of the microparticles.
- the image of a microparticle shows only half of the surface of the particle. If the image of a microparticle shows at least 5 pores, the diameter of which is at least 20 nm and the diameter is in the range from 1/5000 to 1/5 of the mean particle diameter, then the total surface contains at least 10 pores.
- the evaluation of the data thus obtained is carried out in the following way: 1.
- the average particle diameter D [4,3] of the microparticles is already determined on the microparticle dispersion by means of light scattering.
- the upper and lower limits of the particle diameter of the microparticles are calculated, which are taken into account for the determination of the pores ( ⁇ 20%).
- microparticle dispersion is dried.
- microparticles are selected whose particle diameter is in the range of ⁇ 20% of the average particle diameter of the microparticles. Their particle diameter is measured with the ProSuite (FibreMetric) software from Phenom.
- the individual values of the pore diameters are checked to determine whether their diameter fulfills the condition that it lies in the range from 1/5000 to 1/5 of the average particle diameter and is at least 20 nm.
- the microparticles are built up from an organic polymeric wall material.
- the polymeric wall material can in principle be any organic polymer, as is known to be used for the production of porous, gas-filled microparticles.
- Examples of such polymeric wall materials are, above all, condensation polymers such as polyesters, including aliphatic polyesters, partially aromatic polyesters and aromatic polyesters, furthermore polyamides, polyester amides, polycarbonates, but also addition polymers such as polystyrenes, polyacrylates, polyolefins, polyureas and polyurethanes - Lich polyester urethanes and polyether urethanes as well as blends of the aforementioned polymers re.
- the wall material preferably comprises at least one condensation polymer, in particular at least one polyester.
- the wall material preferably contains at least one polymer which has a glass transition temperature or a melting point in the range from 45 to 140 ° C. If the polymer has a melting point, ie is partially crystalline or crystalline, it preferably has a melting point in the range from 45 to 140 ° C. If the polymer is amorphous, it preferably has a glass transition temperature in the range from 45 to 140 ° C. The glass transition temperature is usually determined by means of dynamic differential calorimetry (DSC) in accordance with DIN EN ISO 1 1357.
- DSC dynamic differential calorimetry
- the wall material preferably has a solubility in dichloromethane of at least 50 g / l at 25 ° C.
- the wall material in particular comprises at least one partially aromatic polyester as the main component.
- Partially aromatic polyesters are also called aliphatic-aromatic polyesters i.e. Polyester based on aromatic dicarboxylic acids and aliphatic dihydroxy compounds and polyester based on mixtures of aromatic dicarboxylic acids with aliphatic dicarboxylic acids and aliphatic dihydroxy compounds.
- Aliphatic-aromatic polyesters are preferably polyesters based on mixtures of aliphatic dicarboxylic acids with aromatic dicarboxylic acids and aliphatic dihydroxy compounds. These polymers can be present individually or in their mixtures.
- Wall materials based on such partially aromatic polyesters are typically biodegradable in the sense of this invention and thus also the unfilled microparticles produced therefrom.
- Aliphatic-aromatic polyester should preferably also be understood to mean polyester derivatives such as polyether esters, polyester amides or polyether ester amides and polyester urethanes, as described, for example, in WO 2012/2013506.
- Suitable aliphatic-aromatic polyesters include linear non-chain extended polyesters, as described for example in WO 92/09654. Chain-extended and / or branched aliphatic-aromatic polyesters are preferred. The latter are from WO 96/15173, WO 96/15174, WO 96/15175, WO 96/15176, WO 96/21689,
- the particularly preferred aliphatic-aromatic polyesters include polyesters which contain essential components
- c1) a compound with at least three groups capable of ester formation
- c2) a di- or polyisocyanate
- Aliphatic dicarboxylic acids and their ester-forming derivatives (a1) are generally aliphatic dicarboxylic acids with 2 to 18 carbon atoms, preferably 4 to 10 carbon atoms and their ester-forming derivatives. They can be both linear and branched. In principle, however, dicarboxylic acids with a larger number of carbon atoms, for example with up to 30 carbon atoms, can also be used.
- aliphatic dicarboxylic acids and their ester-forming derivatives (a1) are: oxalic acid, malonic acid, succinic acid, 2-methylsuccinic acid, glutaric acid, 2-methylglutaric acid, 3-methylglutaric acid, a-ketoglutaric acid, adipic acid, pimelic acid, azelaic acid, sebacic acid, sebacic acid , Brassylic acid, fumaric acid,
- 2,2-dimethylglutaric acid suberic acid (suberic acid), diglycolic acid, oxaloacetic acid, glutamic acid, aspartic acid, itaconic acid and maleic acid.
- the dicarboxylic acids or their ester-forming derivatives can be used individually or as a mixture of two or more thereof.
- Succinic acid, adipic acid, azelaic acid, sebacic acid, brassylic acid or their respective ester-forming derivatives or mixtures thereof are preferably used as component (a1).
- Succinic acid, adipic acid or sebacic acid or their respective ester-forming derivatives or mixtures thereof are particularly preferably used.
- Succinic acid, azelaic acid, sebacic acid and brassylic acid also have the advantage that they are accessible from renewable raw materials.
- the aliphatic-aromatic polyester is particularly preferably selected from polybutylene azealate-co-butylene terephthalate (PBAzeT), polybutylene brassylate-co-butylene terephthalate (PBBrasT), polybutylene adipate terephthalate (PBAT), polybutylene sebacate terephthalate (PBSeT) and polybutylene succinate terephthalate (PBST).
- PBAzeT polybutylene azealate-co-butylene terephthalate
- PBBrasT polybutylene brassylate-co-butylene terephthalate
- PBAT polybutylene adipate terephthalate
- PBSeT polybutylene sebacate terephthalate
- PBST polybutylene succinate terephthalate
- aromatic dicarboxylic acids or their ester-forming derivatives (a2) can be used individually or as a mixture of two or more thereof.
- Terephthalic acid or its ester-forming derivatives such as dimethyl terephthalate are particularly preferably used.
- the diols (B) are selected from branched or linear alkane diols having 2 to 12 carbon atoms, preferably 4 to 6 carbon atoms, or cycloalkane diols having 5 to 10 carbon atoms.
- suitable alkanediols are ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,2-butanediol, 1,4-butanediol, 1,5-pentanediol,
- 1,4-cyclohexanedimethanol and 2,2,4,4-tetramethyl-1,3-cyclobutanediol The aliphatic-aromatic polyesters can also contain mixtures of different alkanediols condensed.
- 1,4-Butanediol, in particular in combination with adipic acid as component a1) and 1,3-propanediol, in particular in combination with sebacic acid as component a1) are particularly preferred.
- 1, 3-propanediol also has the advantage that it is accessible as a renewable raw material.
- the preferred aliphatic-aromatic polyesters are characterized by a molecular weight Mn in the range from 1000 to 100000 g / mol, in particular in the range from 9000 to 75000 g / mol, preferably in the range from 10000 to 50,000 g / mol.
- At least one of the polymers contained in the continuous phase of a) preferably has a glass transition temperature or a melting point in the range from 45 to 140 ° C.
- the wall material of the microparticles consists essentially, preferably at least 95% by weight, in particular at least 99% by weight, based on the wall material, of at least one aliphatic-aromatic polyester.
- the wall material contains, in addition to the aliphatic-aromatic polyester, at least one further polymer which is not an aliphatic-aromatic polyester.
- polymers which are not aliphatic-aromatic polyesters are: polyacrylates, polyamides, polycarbonates, polystyrenes, aliphatic polyesters, polyether esters, polyanhydrides, polyester amides, furthermore aromatic / aromatic polyesters, polyolefins, polyureas, polyurethanes, modified polysaccharides and proteins .
- This at least one further polymer is preferably selected from aliphatic polyesters, aliphatic polyanhydrides, aliphatic polyether esters, aliphatic polyester amides, modified polysaccharides and proteins and their mixtures, and is in particular from polymerized hydroxycarboxylic acids, aliphatic-aliphatic polyesters, polylactones, poly (p-dioxanones), polyanhydrides and polyester amides selected.
- the at least one further polymer is particularly preferably selected and aliphatic polyesters and especially among polylactic acid, aliphatic-aliphatic polyesters and poly-C6-Ci2-lactones.
- the particularly preferred group of aliphatic polyesters includes polyhydric fatty acids including poly-C6-Ci2-lactones, polyhydroxyacetic acid, polylactic acid and aliphatic-aliphatic polyesters and mixtures thereof.
- the further polymer comprises an aliphatic polyester from the group consisting of polyhydroxyacetic acids and polylactic acid and their copolymers.
- polylactic acid or polylactide which are also referred to as PLA
- PLA copolymers i.e. Polylactide or polylactic acid copolymers, for example PLGA, i.e. Polylactide-co-glycolide.
- Polylactic acid is preferred among PLA and PLA copolymers.
- Polylactic acid with a molecular weight of 30,000 to 120,000 daltons and a glass transition temperature (Tg) in the range from 50 to 65 ° C. is particularly suitable.
- Amorphous polylactic acid is particularly preferred, the proportion of D-lactic acid being greater than 9%.
- the further polymer comprises an aliphatic polyester from the group of the polyhydroxy fatty acids.
- Polyhydroxy fatty acids are understood to mean polyesters based on hydroxy fatty acid which carry an aliphatic hydrocarbon radical between the carbon atom which carries the OH group and the carbon atom of the carboxyl group, which typically has 1 to 18 C atoms, in particular 1 to 6 C -Atoms.
- Under Po Lyhydroxy fatty acids are also understood to be polyesters of 2-hydroxybutyric acid, in particular their homopolymers. Accordingly, polylactic acid and polyhydroxyacetic acid are not polyhydroxy fatty acids.
- polyhydroxy fatty acid comprise repeating monomer units of formula (1)
- polyhydroxy fatty acids are those which have repeat units of the formula (1).
- the polyhydroxy fatty acids include homopolymers (synonymously homopolyesters), i.e. Polyhydroxy fatty acids consisting of identical hydroxy fatty acid monomers as well as copolymers (synonym copolyester), i.e. polyhydroxy fatty acids consisting of different hydroxy fatty acid monomers.
- the polyhydroxy fatty acids can be used individually or in any mixtures.
- Polyhydroxyhydroxy fatty acids in particular have molecular weights M w of 5,000 to 1,000,000, in particular 30,000 to 1,000,000, in particular 70,000 to 1,000,000, preferably 100,000 to 1,000,000 or 300,000 to 600,000, and / or melting temperatures in the range from 100 to 190 ° C.
- the at least one polyhydroxy fatty acid is selected from the group consisting of
- Copolyesters from hydroxyhexanoic acid with at least one monomer selected from the group consisting of 3-hydroxypropionic acid, hydroxyoctanoic acid and hydroxyoctadecanoic acids and
- Poly-C6-Ci2-lactones especially polycaprolactones.
- Suitable polyhydroxybutyrates can be selected from the group consisting of poly-2-hydroxybutyrates (P2HB), poly-3-hydroxybutyrates (P3HB), poly-4-hydroxybutyrates (P4HB) and copolymers of at least 2 hydroxybutyric acids selected from the group Group consisting of 2-hydroxybutyric acid,
- Poly-3-hydroxybutyrates are sold, for example, by PHB Industrial under the brand name Biocycle® and by Tianan under the name Enmat®.
- Poly-3-hydroxybutyrate-co-4-hydroxybutyrates are known in particular from Metabolix. They are sold under the trade name Mirel®.
- Suitable polyhydroxyhexanoates can be selected from the group consisting of poly-3-hydroxyhexanoates (P3HHx), poly-4-hydroxyhexanoates (P4HHx), poly-6-hydroxyhexanoates (P6HHx), and copolymers of at least 2 hydroxyhexanoic acids selected from the group consisting of
- Suitable polyhydroxyoctanoates can be selected from the group consisting of poly-3-hydroxyoctanoates (P3HO), poly-4-hydroxyoctanoates (P4HO), poly-6-hydroxyoctanoates (P6HO), and copolymers selected from at least 2 hydroxyoxanoic acids the group consisting of 3-hydroxyoctanoic acid,
- Suitable copolyesters from hydroxybutyric acid with at least one monomer selected from the group consisting of 3-hydroxypropionic acid, hydroxyvaleric acid Ren, hydroxyhexanoic acids, hydroxyoctanoic acids and hydroxyoctadecanoic acids are for example:
- Copolyester from 4-hydroxybutyric acid with 3-hydroxyoctadecanoic acid
- Poly-3-hydroxybutyrate-co-3-hydroxyhexanoates are preferably used which have a 3-hydroxyhexanoate content of 1 to 20 and preferably 3 to 15 mol%, based on the total amount of polyhydroxy fatty acid.
- Such poly-3-hydroxybutyrate-co-3-hydroxyhexanoates [P (3HB-co-3HHx] are known from Kaneka and are commercially available under the trade names Aonilex TM X131 A and Aonilex TM X151A.
- Suitable copolyesters of hydroxyvaleric acid are preferably copolyesters of 4-hydroxyvaleric acid and / or 3-hydroxyvaleric acid, with at least one monomer selected from the group consisting of 3-hydroxypropionic acid, hydroxyhexanoic acids, hydroxyoctanoic acids, in particular 3-hydroxyoctanoic acid, and hydroxyoctadecanoic acids.
- Suitable copolyesters of hydroxyhexanoic acid are preferably copolyesters of 3-hydroxyhexanoic acid with at least one monomer selected from the group consisting of 3-hydroxypropionic acid and hydroxyoctanoic acid, preferably 3-hydroxyoctanoic acid, and hydroxyoctadecanoic acids.
- the further polymer comprises an aliphatic polyester from the group of the polylactones, in particular the poly-C6-Ci2-lactones, especially the polycaprolactones.
- Polylactones refer to polyesters which are obtainable by ring-opening polymerization of lactones, in particular C6-C12 lactones and especially epsilon-caprolactone (e-caprolactone).
- polycaprolactone in the sense of the invention means both homopolymers of epsilon-caprolactone and copolymers of epsilon-caprolactone.
- Suitable copolymers are, for example, copolymers of epsilon-caprolactone with monomers selected from the group consisting of lactic acid, lactide, hydroxyacetic acid and glycolide.
- Preferred polycaprolactones are polycaprolactone (PCL), polycaprolactone-co-lactide and polyglycolide-co-lactide-co-caprolactone.
- Polycaprolactones are sold, for example, by Perstorp under the brand name Capa TM or by Daicel under the brand name Celgreen TM.
- the further polymer of the wall material comprises a polycaprolactone.
- the further polymer of the wall material comprises at least one polyhydroxy fatty acid, which is selected from the group consisting of
- Copolyesters from hydroxyhexanoic acid with at least one monomer selected from the group consisting of 3-hydroxypropionic acid, hydroxyoctanoic acid and hydroxyoctadecanoic acids and
- the further polymer of the wall material comprises at least one polyhydroxy fatty acid which consists of is selected from the group consisting of poly-3-hydroxypropionates (P3HP);
- Poly-2-hydroxybutyrates (P2HB); Copolymers of at least 2 hydroxybutyric acids selected from the group consisting of 2-hydroxybutyric acid,
- Poly-3-hydroxymethylvalerates (P3MHV); Copolymers of at least 2 hydroxyvaleric acids selected from the group consisting of 3-hydroxyvaleric acid,
- Poly-6-hydroxyhexanoates (P6HHx); Copolymers of at least 2 hydroxyhexanoic acids selected from the group consisting of 3-hydroxyhexanoic acid,
- Poly-6-hydroxyoctanoate (P6HO); Copolymers of at least 2 hydroxyoctanoic acids selected from the group consisting of 3-hydroxyoctanoic acid,
- 3-hydroxypropionic acid hydroxyoctanoic acid, preferably 3-hydroxyoctanoic acid and hydroxyoctadecanoic acids; and polycaprolactones.
- the further polymer of the wall material comprises at least one polyhydroxy fatty acid, which is selected from the group of the polyhydroxyalkanoates.
- Polyhydroxyalkanoates are primarily understood to mean poly-4-hydroxybutyrates and poly-3-hydroxybutyrates; copolyesters of the aforementioned hydroxybutyrates with 3-hydroxyvalerates (P (3HB) -co-P (3HV)) or 3-hydroxyhexanoate are also included.
- the polyhydroxyalkanoates usually have a molecular weight Mw of 30,000 to 1,000,000 g / mol and preferably 100,000 to 600,000 g / mol.
- the further polymer of the wall material comprises at least one aliphatic-aliphatic polyester.
- Aliphatic-aliphatic polyesters are understood to mean polyesters based on aliphatic dicarboxylic acids and aliphatic dihydroxy compounds and polyesters based on mixtures of aliphatic dicarboxylic acids with aliphatic dicarboxylic acids and aliphatic dihydroxy compounds.
- aliphatic carboxylic acids which are suitable for producing the aliphatic-aliphatic polyesters are the aliphatic dicarboxylic acids mentioned under (a1), in particular those having 2 to 18 carbon atoms, preferably 4 to 10 carbon atoms.
- Aliphatic-aliphatic polyesters in which the aliphatic dicarboxylic acid is selected from succinic acid, adipic acid, azelaic acid, sebacic acid, brassylic acid and mixtures thereof are preferred. Succinic acid, adipic acid and sebacic acid and mixtures thereof are particularly preferred.
- their respective ester-forming derivatives or mixtures thereof with the aliphatic dicarboxylic acids can also be used instead of the dicarboxylic acids.
- aliphatic diols which are suitable for producing the aliphatic-aliphatic polyester are the diols mentioned as component (B), for example branched or linear alkanediols having 2 to 12 carbon atoms, preferably 4 to 6 carbon atoms, or cycloalkanediols having 5 up to 10 carbon atoms.
- suitable alkanediols are, in particular, ethylene glycol, 1,2-propanediol, 1,3-propanediol,
- cycloalkanediols are cyclopentanediol, 1,4-cyclohexanediol, 1,2-cyclohexanedimethanol,
- 1,3-cyclohexanedimethanol, 1,4-cyclohexanedimethanol and 2,2,4,4-tetramethyl-1,3-cyclobutanediol 1,3-cyclohexanedimethanol, 1,4-cyclohexanedimethanol and 2,2,4,4-tetramethyl-1,3-cyclobutanediol.
- the aliphatic-aliphatic polyesters can also contain mixtures of different alkanediols in condensed form. Are particularly preferred
- 1,4-butanediol in particular in combination with one or two aliphatic dicarboxylic acids, which are selected from succinic acid, adipic acid and sebacic acid as component a1).
- aliphatic dicarboxylic acids which are selected from succinic acid, adipic acid and sebacic acid as component a1.
- particularly preferred aliphatic-aliphatic polyesters are polybutylene succinate adipate, polybutylene succinate, polybutylene sebacate, polybutylene succinate sebacate.
- the preferred aliphatic-aliphatic polyesters frequently have a molecular weight Mn in the range from 1000 to 100,000 g / mol, in particular in the range from 9000 to 2000 g / mol, especially in the range from 5000 to 50,000 g / mol.
- the further polymer of the wall material comprises a poly-p-dioxanone (poly-1, 4-dioxan-2-one).
- Poly-p-dioxanones refer to poly (ether esters) which can be obtained from ring-opening polymerization from 1,4-dioxan-2-one.
- poly (p-dioxanones) is understood to mean homopolymers of 1,4-dioxan-2-one which have the general structural unit [-0-CH 2 -CH 2 -0-CH 2 -C0-] n .
- poly (p-dioxanones) is also understood to mean copolymers of 1,4-dioxan-2-one with lactone monomers. Copolymers of 1,4-dioxan-2-one with at least one further monomer selected from the group consisting of glycolide, lactide and epsilon-caprolactone are particularly suitable.
- the further polymer of the wall material comprises a polyanhydride.
- Polyanhydrides refer to polymers with the general structural unit as characteristic basic units of the main chain. R 1 and R 2 can be the same or different aliphatic or aromatic radicals. Suitable polyanhydrides are described in Kumar et al, Adv. Drug Delivery Reviews 54 (2002), pp. 889-910. The ones described in Kumar et al. Adv. Drug Delivery Reviews 54 (2002), on p. 897 described polyanhydrides, to which reference is made in full here.
- the polyanhydride is selected from the group of aliphatic polyanhydrides, in particular from the group consisting of polysebacic acid and polyadipic acid.
- Polyesteramides in particular aliphatic polyesteramides, are suitable as further polymers which can be used in combination with the aliphatic-aromatic polyester as wall material.
- Aliphatic polyester amides are copolymers of aliphatic polyamides and aliphatic polyesters and thus polymers that carry both amide and ester functions.
- Particularly suitable polyester amides are polyester amides, which are obtained by condensation of e-caprolactam, adipic acid and 1,4-butanediol and polyesteramides which are obtained by condensing adipic acid, 1,4-butanediol, diethylene glycol and hexamethylenediamine.
- Polyester amides are sold, for example, by Bayer under the trade name BAK TM, such as BAK TM 1095 or BAK TM 2195.
- Polysaccharides are suitable as further polymers which can be used in combination with the aliphatic-aromatic polyester as wall material.
- Polysaccharides are macromolecules in which a large number of sugar residues are glycosidically linked.
- Polysaccharides suitable according to the invention are in particular polysaccharides which have a solubility at 25 ° C. of at least 50 g / l in dichloromethane.
- Polysaccharides for the purposes of the invention also include their derivatives, provided that they have a solubility at 25 ° C. of at least 50 g / l in dichloromethane.
- Polysaccharides suitable according to the invention are preferably selected from the group consisting of modified starches, such as, in particular, starch ethers and esters, cellulose derivatives, such as, in particular, cellulose esters and cellulose ethers, chitin derivatives, chitosan derivatives.
- Cellulose derivatives are generally chemically modified celluloses by polymer-analogous reactions designated. They include products in which only the hydroxy hydrogen atoms of the glucose units of cellulose are substituted by organic or inorganic groups, as well as those in which the entire hydroxyl groups have been formally exchanged (eg deoxy celluloses) .
- Suitable cellulose ethers are, for example, methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose and hydroxypropyl methyl cellulose.
- Suitable cellulose ethers are methyl hydroxy (Ci-C4) alkyl cellulose.
- Methylhydoxy- (Ci-C4) -alkylcellulose means methylhydroxy- (Ci-C4) -alkylcellulose with different degrees of methylation as well as degrees of alkoxylation.
- the preferred methylhydroxy (Ci-C4) alkyl celluloses have an average degree of substitution DS of 1.1 to 2.5 and a molar degree of substitution MS of 0.03 to 0.9.
- Suitable methylhydroxy (C 1 -C 4) alkyl cellulose are, for example, methyl hydroxyethyl cellulose or methyl hydroxypropyl cellulose.
- Suitable cellulose esters are, for example, the esters of cellulose with C2-C4 monocarboxylic acids, such as cellulose acetate (commercially available from Eastmann CA-398-3), cellulose butyrates, cellulose acetobutyrates, cellulose propionate and cellulose acetopropionate.
- C2-C4 monocarboxylic acids such as cellulose acetate (commercially available from Eastmann CA-398-3), cellulose butyrates, cellulose acetobutyrates, cellulose propionate and cellulose acetopropionate.
- Cellulose esters are available in a wide variety of degrees of polymerization and substitution.
- Proteins are suitable as further polymers which can be used in combination with the aliphatic-aromatic polyester as wall material.
- Proteins to be used according to the invention include polypeptides (condensation products of amino acids linked by peptide bond in an acid amide-like manner) and their derivatives which have a solubility at 25 ° C. of at least 50 g / l in dichloromethane.
- the polypeptides can be of natural or synthetic origin.
- the wall material comprises a combination of or consists of
- At least one aliphatic-aromatic polyester which is selected from polybutylene azealate-co-butylene terephthalate (PBAzeT), polybutylene brassylate-co-butylene terephthalate (PBBrasT), polybutylene adipate terephthalate (PBAT), polybutylene lensebacate terephthalate (PBSeTthalate) (PBSeTthalate) (PBSeTthalate) (PBSeT) and and and
- At least one aliphatic polyester which is selected from aliphatic polyesters, in particular from polyhydroxy fatty acids including poly-C6-Ci2-lactones, polyhydroxyacetic acid, polylactic acid and aliphatic-aliphatic polyesters and their mixtures and especially from polylactic acid, aliphatic-aliphatic polyesters and poly-C6 -Ci2 lactones.
- the wall material comprises a combination of or consists of
- At least one aliphatic-aromatic polyester which is selected from polybutylene azealate-co-butylene terephthalate (PBAzeT), polybutylene brassylate-co- butylene terephthalate (PBBrasT), polybutylene adipate terephthalate (PBAT), polybutylene sebacate terephthalate (PBSeT) and polybutylene succinate terephthalate (PBST); and
- PBAzeT polybutylene azealate-co-butylene terephthalate
- PBBrasT polybutylene brassylate-co- butylene terephthalate
- PBAT polybutylene adipate terephthalate
- PBSeT polybutylene sebacate terephthalate
- PBST polybutylene succinate terephthalate
- At least one aliphatic polyester which is selected from polycaprolactones, polylactic acid (PLA), polylactide glycolide, polybutylene succinate adipate, polybutylene succinate, polybutylene sebacate, polybutylene succinate sebacate.
- the proportion of the aliphatic-aromatic polyester is preferably 30 to 80% by weight, preferably 35 to 75% by weight, more preferably 40 to 70% by weight or likewise preferably 30 to 70% by weight and especially 45 to 70 % By weight, based on the total weight of aliphatic-aromatic polyester and the polymer which is not an aliphatic-aromatic polyester.
- the mass ratio of aliphatic-aromatic polyester to the at least one further polymer, which is different from aliphatic-aromatic polyesters is in the range from 30:70 to 99: 1 or in the range from 30:70 to 80:20, in particular in the range from 35: 65 to 75: 25 and especially in the range from 40: 60 to 70: 30 or in the range from 30: 70 to 70: 30 and especially in the range from 45: 55 to 70: 30.
- the wall material comprises a combination of or consists of
- aliphatic-aromatic polyester which is selected from polybutylene azealate-co-butylene terephthalate (PBAzeT), polybutylene brassylate-co-butylene terephthalate (PBBrasT), polybutylene adipate terephthalate (PBAT), polybutylene sebacate terephthalate (PBSeT) and polybutylene succinate terephthalate (PBST); and
- PBAzeT polybutylene azealate-co-butylene terephthalate
- PBBrasT polybutylene brassylate-co-butylene terephthalate
- PBAT polybutylene adipate terephthalate
- PBSeT polybutylene sebacate terephthalate
- PBST polybutylene succinate terephthalate
- the wall material comprises a combination of or consists of
- aliphatic-aromatic polyester which is selected from polybutylene azealate-co-butylene terephthalate (PBAzeT), polybutylene brassylate-co-butylene terephthalate (PBBrasT), polybutylene adipate terephthalate (PBAT), polybutylene sebacate terephthalate (PBSeT) and polybutylene succinate terephthalate (PBST); and
- PBAzeT polybutylene azealate-co-butylene terephthalate
- PBBrasT polybutylene brassylate-co-butylene terephthalate
- PBAT polybutylene adipate terephthalate
- PBSeT polybutylene sebacate terephthalate
- PBST polybutylene succinate terephthalate
- At least one aliphatic polyester which is selected from polycaprolactones, polylactic acid (PLA), polylactide glycolide, polybutylene succinate adipate, polybutylene succinate, polybutylene sebacate , Polybutylsuccinate sebacate.
- spherical microparticles are impregnated, the spherical microparticles being selected from spherical microparticles consisting of a wall material of 30 to 80% by weight, preferably 35 to 75% by weight, more preferably 40 to 70% by weight and in particular 45 to 70% by weight, based in each case on the total mass of the wall material, PBSeT and 20 to 70% by weight, preferably 25 to 65% by weight, more preferably 30 to 60% by weight and especially 30 to 55 % By weight, based in each case on the total mass of the wall material, polycaprolactone and spherical microparticles consisting of a wall material of 30 to 80% by weight, preferably 35 to 75% by weight, more preferably 40 to 70% by weight.
- % and especially 45 to 70% by weight each based on the total mass of the wall material, PBAT and 20 to 70% by weight, preferably 25 to 65% by weight, more preferably 30 to 60% by weight and especially 30 to 55% by weight, based on the total mass of the wall material, polycaprolacto n.
- the spherical microparticles are selected from spherical microparticles consisting of a wall material composed of 55% by weight of PBAT and 45% by weight of polycaprolactone, in each case based on the total mass of the wall material, and spherical microparticles consisting of one Polymer material made from 55% by weight of PBSeT and 45% by weight of polycaprolactone, in each case based on the total mass of the wall material.
- melts of an aliphatic-aromatic polyester with another polymer that is not an aliphatic-aromatic polyester are preferred in which the melting point of the aliphatic-aromatic polyester is at least 10 ° C. preferably at least is at least 20 ° C. above the melting point of the further polymer or the glass transition temperature of the aliphatic-aromatic polyester is at least 10 ° C., preferably at least 20 ° C., above the glass transition temperature of the further polymer. If the further polymer is an amorphous compound, then the melting point of the aliphatic-aromatic polyester is at least 10 ° C., preferably at least 20 ° C., above the glass transition temperature of the further polymer.
- microparticles for loading are those described in WO 2018/065481 and the older European patent application 18166159.6, in particular the particles described there in the examples.
- microparticles intended for loading are usually produced by a process in which
- a water-in-oil emulsion composed of water or an aqueous solution of a pore former as a discontinuous phase and a continuous phase, comprising in particular a solution of at least one polymer or polymer mixture suitable as wall material at least one polyester, especially at least one aliphatic-aromatic polyester, in a water-immiscible solvent
- the w / o emulsion obtained in a) is emulsified in water in the presence of a dispersant to form a w / o / w emulsion (water-in-oil-water emulsion) with droplets of an average size of 10 to 600 ⁇ m and that non-water-miscible solvents are removed at a temperature in the range from 20 to 80 ° C., preferably from 20 to 45 ° C.,
- microparticles formed in process step b) are separated off and optionally dried.
- the microparticles are therefore usually produced by removing the solvent in a w / o / w emulsion.
- an emulsion of water droplets or droplets of the aqueous pore-forming solution is formed in the polyester solution.
- This w / o emulsion is in turn emulsified in water to form a w / o / w emulsion and the water-immiscible solvent is removed.
- the polymer or polymer mixture becomes insoluble and separates from the surface of the water droplets or the aqueous pore-forming droplets.
- Pore formers are, for example, compounds which release gas under the process conditions of step b).
- Pore formers are typically agents which release a gas, for example CO 2 , and are preferably selected from ammonium carbonate, sodium carbonate, ammonium hydrogen carbonate, ammonium sulfate, ammonium oxalate, sodium hydrogen carbonate, ammonium carbamate and sodium carbamate.
- Water-soluble, low-molecular compounds which build up an osmotic pressure are also suitable as pore formers.
- pore formers are preferably selected from sugars such as monosaccharides, disaccharides, oligosaccharides and polysaccharides, urea, inorganic alkali salts such as sodium chloride and inorganic alkaline earth salts such as magnesium sulfate and calcium chloride. Glucose and sucrose and urea are particularly preferred.
- Polymers that are soluble in both phases are also suitable as pore formers, such as, for example, polyethylene glycol (PEG) and polyvinylpyrrolidone (PVP). Since these polymers are soluble in both phases, they migrate from the aqueous phase into the oil phase due to diffusion.
- PEG polyethylene glycol
- PVP polyvinylpyrrolidone
- composition of spherical microparticles is also used.
- the composition of the microparticles intended for loading is produced by the double emulsion method. This particularly preferably comprises the process steps a), b) and c) specified here. In this way, spherical microparticles with the above-mentioned particle sizes and pore contents are obtained.
- Process step a) For this purpose, the polymer or polymer mixture suitable as wall material is dissolved in a non-water-miscible solvent.
- non-water-miscible means that the solvent has a solubility in water at a temperature of 20 ° C. and a pressure of 1 bar of ⁇ 90 g / L.
- the water-immiscible solvent preferably has a boiling point of at least 30 ° C.
- solvents are chemically inert with respect to the substances to be dissolved, that is to say they only serve for dilution or solution. Radically polymerizable monomers are not solvents in the context of the invention.
- Aprotic nonpolar and aprotic polar solvents or solvent mixtures which have a water solubility of ⁇ 90 g / L (at 20 ° C.) are preferred.
- Preferred solvents are, for example, dichloromethane, chloroform, ethyl acetate, n-hexane, cyclohexane, methyl tert-butyl ether, pentane, diisopropyl ether and benzene or mixtures of two or more of these solvents with one another.
- Dichloromethane is particularly preferred.
- Solvent mixtures which form an azeotrope and whose boiling point falls in the range from 20 to 80 ° C. are also suitable.
- An example is the azeotrope of hexane and methyl ethyl ketone (MEK) in a weight ratio of 72:28.
- MEK methyl ethyl ketone
- the polymer or polymer mixture suitable as wall material is used in the non-water-miscible solvent as a 1 to 50% strength by weight solution.
- the polymer solution prepared in this way is preferably a 2 to 30% by weight solution, in particular a 5 to 20% by weight solution in the non-water-miscible solvent.
- an emulsion is selected from a solution of at least one polymer or a polymer mixture suitable as wall material.
- Preferred is an emulsion from a solution of the polymer or polymer mixture suitable as wall material, the at least one polyester, in particular at least one aliphatic-aromatic polyester and especially a mixture of at least one aliphatic-aromatic polyester with a further polymer that is not an aliphatic-aromatic Is polyester and in particular is an aliphatic-aliphatic polyester such as polylactic acid.
- the solution used to produce the microparticles can be obtained by mixing the individual polymer solutions or by dissolving a polymer mixture together.
- the polymer or polymer suitable as wall material lymer mix is the wall material of the later microparticle.
- the wall material of the microparticles preferably has a solubility at 25 ° C. and 1 bar of at least 50 g / l in dichloromethane.
- the continuous phase produced under a) essentially consists of the solution of an aliphatic-aromatic polyester in a water-immiscible solvent.
- the continuous phase particularly preferably consists of at least 95% by weight, in particular at least 99% by weight, based on the continuous phase, of the solution of an aliphatic-aromatic polyester in a non-water-miscible solvent.
- the continuous phase produced under a) consists essentially, ie at least 95% by weight, in particular at least 99% by weight, of the aliphatic-aromatic polyester and the water-immiscible solvent.
- the continuous phase produced under a) contains the aliphatic-aromatic polyester and at least one further dissolved polymer which is not an aliphatic-aromatic polyester and in particular among the preferred or particularly preferred polymers and whose mixtures is selected.
- the mass ratio of aliphatic-aromatic polyester to the at least one further polymer, which is different from aliphatic-aromatic polyesters is preferably in the range from 30:70 to 99: 1 or in the range from 30:70 to 80: 20, in particular in the range from 35:65 to 75:25 and especially in the range from 40:60 to 70:30 or in the range from 30:70 to 70:30 and especially in the range from 45:55 to 70:30.
- the polymers used to prepare the continuous phase comprise a combination of or consist of i) at least one aliphatic-aromatic polyester which is selected from polybutylene azealate-co-butylene terephthalate (PBAzeT), polybutylene brassylate-co-butylene terephthalate (PBBrasT) ), Polybutylene adipate terephthalate (PBAT), polybutylene sebacate terephthalate (PBSeT) and polybutylene succinate terephthalate (PBST); and
- PBAzeT polybutylene azealate-co-butylene terephthalate
- PBBrasT polybutylene brassylate-co-butylene terephthalate
- PBAT Polybutylene adipate terephthalate
- PBSeT polybutylene sebacate terephthalate
- PBST polybutylene succinate terephthalate
- At least one aliphatic polyester which is selected from aliphatic polyesters, in particular from polyhydroxy fatty acids including poly-C6-Ci2-lactones, polyhydroxyacetic acid, polylactic acid and aliphatic-aliphatic Polyesters and their mixtures and especially among polylactic acid, aliphatic-aliphatic polyesters and poly-C6-Ci2-lactones.
- the polymers used to produce the continuous phase comprise a combination of or consist of
- At least one aliphatic-aromatic polyester which is selected from polybutylene azealate-co-butylene terephthalate (PBAzeT), polybutylene brassylate-co-butylene terephthalate (PBBrasT), polybutylene adipate terephthalate (PBAT), polybutylene lensebacate terephthalate (PBSeTthalate) (PBSeTthalate (PBSeT) phthalate (PBSeT) phthalate) and and and
- At least one aliphatic polyester selected from polycaprolactones, polylactic acid (PLA), polylactide glycolide, polybutylene succinate adipate, polybutylene succinate, polybutylene sebacate, polybutylene succinate sebacate.
- the polymers used to produce the continuous phase comprise a combination of or consist of iii) 30 to 80% by weight, preferably 35 to 75% by weight, more preferably 40 to
- aliphatic-aromatic polyester which is selected from polybutylene azealate-co-butylene terephthalate (PBAzeT), polybutylene brassylate-co- butylene terephthalate (PBBrasT), polybutylene adipate terephthalate (PBAT), polybutylene sebacate terephthalate (PBSeT) and polybutylene succinate terephthalate (PBST); and iv) 20 to 70% by weight, preferably 25 to 65% by weight, more preferably 30 to
- aliphatic polyester which is selected from aliphatic polyesters, in particular from polyhydroxy fatty acids including poly-C6- Ci2-lactones, polyhydroxyacetic acid, polylactic acid and aliphatic-aliphatic polyesters and their mixtures and especially among polylactic acid, aliphatic-aliphatic polyesters and poly-C6-Ci2-lactones.
- the polymers used to produce the continuous phase comprise a combination of or consist of
- aliphatic-aromatic polyester which is selected from polybutylene azealate-co- Butylene terephthalate (PBAzeT), polybutylene brassylate-co-butylene terephthalate (PBBrasT), polybutylene adipate terephthalate (PBAT), polybutylene sebacate terephthalate (PBSeT) and polybutylene succinate terephthalate (PBST); and iv) 20 to 70% by weight, preferably 25 to 65% by weight, more preferably 30 to
- polystyrene resin 60% by weight and especially 30 to 55% by weight, in each case based on the total mass of the polymer combination used, of at least one aliphatic polyester which is selected from polycaprolactones, polylactic acid (PLA), polylacetide glycolide, polybutylene succinate adipate, Polybutylene succinate, polybutylene sebacate, polybutylene succinate sebacate.
- PVA polylactic acid
- PALS polylacetide glycolide
- polybutylene succinate adipate Polybutylene succinate, polybutylene sebacate, polybutylene succinate sebacate.
- the polymers used to produce the continuous phase consist of a combination of 30 to 80% by weight, preferably 35 to 75% by weight, more preferably 40 to 70% by weight and especially 45 to 70% %
- PBSeT and 20 to 70% by weight based in each case on the total mass of the combination, PBSeT and 20 to 70% by weight, preferably 25 to 65% by weight, more preferably 30 to 60% by weight and especially 30 to 55% by weight , each based on the total mass of the combination, polycaprolactone or from a combination of 30 to 80% by weight, preferably 35 to 75% by weight, more preferably 40 to 70% by weight and especially 45 to 70% by weight , each based on the total mass of the combination, PBAT and 20 to 70 wt .-%, preferably 25 to 65 wt .-%, more preferably 30 to 60 wt .-% and especially 30 to
- the polymers used to produce the continuous phase consist of a combination of 55% by weight of PBAT and 45% by weight of polycaprolactone, in each case based on the total mass of the combination, or of a combination of 55% by weight.
- process step a water or an aqueous solution of the pore former is emulsified in this polymer solution.
- the aqueous solution of the pore former is preferably a 0.1 to 10% by weight aqueous solution of the pore former, in particular a pore former selected from ammonium bicarbonate and ammonium carbonate.
- Ammonium carbonate in particular a 0.1 to 1% strength by weight solution of ammonium carbonate in water, is particularly preferably used as the pore-forming solution.
- the polymers forming the wall material preferably consist of at least one polyester or a mixture of several polyesters, or at least one polyester and min. at least one polymer different from a polyester, in particular from at least one aliphatic-aromatic polyester, at least one additional polymer different from an aliphatic-aromatic polyester, for example an aliphatic polyester, and optionally at least one further polymer.
- 1 to 5 parts by weight, in particular 1, 3 to 3 parts by weight, of the pore former based on 100 parts by weight of the buzzer of the polymers forming the wall material are preferably used.
- the emulsification in process step a) is usually carried out with the aid of a dispersant, e.g. a rotor stator or rotor-rotor disperser or with the help of a high-pressure disperser or high-pressure homogenizer or an ultrasonic homogenizer or a gear rim dispersing machine.
- a dispersant e.g. a rotor stator or rotor-rotor disperser or with the help of a high-pressure disperser or high-pressure homogenizer or an ultrasonic homogenizer or a gear rim dispersing machine.
- the aforementioned homogenizing or dispersing machines are particularly suitable for producing the w / o emulsion, since these can introduce high shear energy into the system and thus small droplet sizes are obtained.
- the mean droplet size, i.e. the D [4,3] value, the emulsion drop is generally 0.2 to 50 pm.
- the w / o emulsion produced in process step a) can be stabilized with one or more dispersants.
- Dispersants suitable for w / o emulsions are generally known and are mentioned, for example, in EP 2794085 and EP 3007815, the teaching of which is expressly incorporated by reference.
- one or more emulsifiers can be used to prepare and stabilize the w / o emulsion in step a), which preferably have an HLB value according to Griffin in the range from 2 to 10. in particular in the range from 3 to 8.
- HLB value HLB
- Hydrophilic-Lipophilic-Balance according to Griff in (WC Griffin: Classification of surface active agents by HLB. In: J. Soc. Cosmet. Chem. 1, 1949, pp. 31 1-326) interposes a dimensionless number 0 and 20 represent which statements about the water and oil solubility of a connection.
- They are preferably nonionic emulsifiers with an HLB value according to Griffin in the range from 2 to 10, in particular in the range from 3 to 8.
- anionic and zwitterionic emulsifiers with an HLB value according to Griffin in the range from are also suitable 2 to 10, in particular in the range from 3 to 8.
- such emulsifiers are used in an amount of 0.1 to 5% by weight, in particular 0.5 to 4% by weight, based on the total weight of the emulsion prepared in step a).
- Suitable emulsifiers with an HLB value according to Griff in in the range from 2 to 10 are:
- Sorbitan fatty acid esters especially sorbitan mono-, di- and trifatty acid esters and mixtures thereof, such as sorbitan monostearate, sorbitan monooleate, sorbitan anmonolaurate, sorbitan tristearate, sorbitan sesquioleate, sorbitan dioleate, sorbitan antrioleate;
- Fatty acid esters of glycerol or polyglycerol such as glycerol monostearate, glycerol distearate, glycerol monooleate, glycerol dioleate, glycerol monostearate monoacetate, glycerol monoacetate monooleate, polyglycerol polyrinoleate (E476), e.g. the commercially available emulsifier PGPR 90
- Ci 2 -C 22 alkanols with degrees of alkoxylation in the range from 2 to 10 for example stearyl alcohol ethoxylate with a degree of ethoxylation in the range from 2 to 5, stearyl alcohol ethoxylate-co-propoxylate with degrees of alkoxylation in the range from 2 to 8, isotridecyl ethoxylates with degrees of ethoxylation in the range from 2 to 3 and isotridecylethoxylate-co-propoxylates with degrees of alkoxylation in the range from 2 to 5,
- C4-Ci6 alkylphenols with degrees of alkoxylation in the range from 2 to 10, e.g. Nonylphenol ethoxylate with degrees of ethoxylation in the range from 2 to 5 and octylphenol ethoxylate with degrees of ethoxylation in the range from 2 to 5.
- the w / o emulsion is emulsified in water to form the w / o / w emulsion in process step b) by stirring or shearing in the presence of a dispersant.
- An aqueous solution of the dispersant can be added to the w / o emulsion.
- the dispersant is preferably introduced in the form of an aqueous solution and the w / o emulsion is metered in.
- the dispersant affects the size of the emulsion droplet in equilibrium.
- the concentration of the dispersant in the aqueous dispersant solution is typically in the range from 0.1 to 8.0% by weight, in particular in the range from 0.3 to 5.0% by weight and especially in the range from 0.5 to 4 , 0 wt .-%, based on the total weight of the aqueous solution.
- the weight ratio of the w / o emulsion to water provided in step a), preferably in the form of the aqueous dispersant solution, is typically in the range from 15:85 to 55:45, in particular in the range from 25:75 to 50:50, and especially in the range from 30: 70 to 45: 55.
- the amount of dispersant used is typically at least 0.1% by weight, in particular at least 0.2% by weight, based on the total weight of the w / o / w emulsion, and in particular is Range of 0.1 to 2 wt .-% and especially in the range of 0.2 to 1 wt .-%, based on the total weight of the w / o / w emulsion.
- stirrer examples include propeller stirrer, impeller stirrer, disc stirrer, blade stirrer, anchor stirrer, inclined blade stirrer, cross bar stirrer, spiral stirrer, screw stirrer and others.
- Suitable devices for generating a high shear field are comminution machines operating according to the rotor-stator principle, such as gear rim dispersing machines, colloid and corundum disk mills as well as high-pressure and ultrasound homogenizers.
- the gear rim dispersing machines operating according to the rotor-stator principle are preferably used to generate the shear field.
- the diameter of the rotors and stators is usually in the range between 2 and 40 cm, depending on the machine size and dispersion performance.
- the speed of such dispersing machines is generally in the range from 500 to 20,000 rpm (revolutions per minute), depending on the type.
- Knives are usually operated in the range of high speeds.
- the distance between the rotating parts and the fixed parts of the dispersing tool is usually 0.1 to 3 mm.
- the final size of the emulsion droplets of the w / o / w emulsion should be an average diameter D [4.3] (determined by means of light scattering) from 100 to 600 ⁇ m. This final size is usually achieved by stirring.
- the final size of the emulsion droplets of the w / o / w emulsion should have an average diameter of 10 to 100 pm, preferably 10 to 30 pm. This final size is usually achieved with scissors.
- the shear energy introduced can be derived directly from the power consumption of the device for generating a shear field, taking into account the heat loss.
- the shear energy introduced into the w / o / w emulsion is preferably 250 to 25,000 watt h / m 3 batch size.
- the w / o / w emulsion is prepared in the presence of at least one dispersant.
- the w / o / w emulsion can be prepared in the presence of a mixture of different dispersants. Likewise, only one dispersant can be used.
- Suitable dispersants are, for example, cellulose derivatives, such as hydroxyethyl cellulose, methyl hydroxyethyl cellulose, methyl cellulose and carboxymethyl cellulose, polyvinyl pyrrolidone, copolymers of vinyl pyrrolidone, gelatin, gum arabic, xanthan, casein, polyethylene glycols, and partially or completely hydrolysed and vinyl hydroxylated cellulosics (as well as polyvinyl alcohols) and polyvinyl alcohols (polyvinyl alcohols) and polyvinyl alcohols (polyvinyl alcohol) cellulose and polyvinyl alcohols (polyvinyl alcohol) and (polyvinyl alcohol) cellulosic (polyvinyl alcohol) cellulose and polyvinyl alcohols (polyvinyl alcohol) and polyvinyl alcohols (polyvinyl alcohol) as well .
- cellulose derivatives such as hydroxyethyl cellulose, methyl hydroxyethy
- Preferred dispersants are partially or fully hydrolyzed polyvinyl acetates (polyvinyl alcohols) and methylhydroxy (Ci-C4) alkyl cellulose and mixtures thereof.
- Partially hydrolyzed polyvinyl acetates which are also referred to as partially hydrolyzed polyvinyl alcohols (PVA) are particularly preferred, preferably those with a degree of hydrolysis of 79 to 99.9%.
- PVA copolymers as described in WO 2015/165836 are also suitable.
- Methylhydroxy- (Ci-C4) -alkylcellulose means methylhydroxy- (Ci-C4) -alkylcellulose with different degrees of methylation as well as degrees of alkoxylation.
- the preferred methylhydroxy (Ci-C4) alkyl celluloses have an average degree of substitution DS of 1.1 to 2.5 and a molar degree of substitution MS of 0.03 to 0.9.
- Suitable methylhydroxy- (Ci-C4) -alkylcellulose are, for example, methylhydroxyethylcellulose or methylhydroxypropylcellulose.
- a particularly preferred dispersant is methyl hydroxypropyl cellulose.
- Very particularly preferred dispersants are polyvinyl alcohols, in particular polyvinyl alcohols with a degree of hydrolysis of 79 to 99.9%.
- a special dispersant for step b) is a carboxy-modified anionic PVA with a carboxyl group fraction of 1 to 6 mol% and a degree of hydrolysis of 85 to 90 mol%, and very particularly such a carboxy-modified anionic PVA, the 4 wt. -% aqueous solution at 20 ° C has a viscosity of 20.0 to 30.0 mPa-s.
- the dispersant is added in particular to the aqueous phase.
- concentration of the dispersant in the aqueous phase is typically in the range from 0.1 to 8.0% by weight, in particular in the range from 0.3 to 5.0% by weight and especially in the range from 0.5 up to 4.0% by weight, based on the total weight of the aqueous phase.
- the weight ratio of the w / o emulsion provided in step a) to the aqueous phase containing the dispersant is typically in the range from 15:85 to 55:45, in particular in the range from 25:75 to 50:50, and especially in the range from 30: 70 to 45: 55.
- carboxy-modified anionic PVA (with a degree of hydrolysis of 85 to 90 mol% and a viscosity of 20.0 to 30.0 mPa-s (4% by weight aqueous solution at 20 ° C.) and a carboxyl group - Part of 1 to 6 mol%) as 0.1 to 8.0% by weight aqueous solution, in particular as 0.1 to 5.0% by weight aqueous solution and especially as 0.3 to 4 , 0 wt .-% aqueous solution used.
- aqueous solutions with a PVA content of 0.3 to 2.5% by weight, in particular with a PVA content of 0.5 to 1.5% by weight can be used.
- the emulsification to the w / o / w emulsion is carried out with a stirrer at a stirring speed of 5000 to 15,000 rpm over a period of 1 to 30 minutes.
- the droplets thus produced have an average diameter of 0.2 to 30 pm.
- the emulsion is produced at a stirring speed of 100 to 1000 rpm over a period of 1 to 30 minutes.
- the mean diameter of the droplets produced in this way is preferably 100 to 600 ⁇ m.
- the mixture is kept at a temperature in the range from 10 to 80 ° C.
- the temperature of the mixture is preferably chosen so that it is below the glass transition temperature of the lowest softening amorphous polymer or below the melting point of the lowest melting crystalline polymer of the composition forming the wall material. Higher temperatures are possible, but can lead to a partial closure of the pores over a long period of time.
- the mixture is preferably kept at a temperature in the range from 20 to 45 ° C., in particular from 20 to ⁇ 40 ° C.
- a vacuum can also be applied. For example, work can be carried out in the range from 600 to 800 mbar or below 200 mbar.
- both the stirring / shearing and the temperature result in the non-water-miscible solvent of the at least one aliphatic-aromatic polyester evaporating and the microparticles remaining. If it is a solvent with a vapor pressure> 450 hPa at 20 ° C, it is sufficient to stir the w / o / w emulsion obtained from b) at room temperature 20 ° C. Depending on the amount of solvent and the ambient temperature, such a process takes a few hours. Depending on the solvent, it is possible to facilitate the removal of the solvent by increasing the temperature to a temperature of up to 80 ° C. and / or by applying a vacuum.
- microparticles formed by separating off the water-immiscible solvent are separated off in process step c) and preferably dried.
- Dried means that the microparticles contain a residual water content of ⁇ 5% by weight, preferably ⁇ 1% by weight, based on the microparticles. Drying can be carried out, for example, in an air stream and / or by applying a vacuum. gene, if necessary with heating.
- convective dryers such as spray dryers, fluidized beds and cyclone dryers, contact dryers such as plate dryers, paddle dryers, contact belt dryers, vacuum drying cupboards or radiation blocks such as infrared rotary tube dryers and microwave mix dryers.
- the spherical microparticles obtained in this way are distinguished, inter alia, by the fact that they are easy to fill, for example by suspending them in a solution.
- a particularly preferred method for producing the microparticles is in
- the microparticles are loaded with at least one organic active substance.
- the organic, low molecular weight active substance is preferably liquid at 22 ° C. and 1013 mbar or has a melting point below 100 ° C. Active substances which are liquid at 22 ° C. and 1013 mbar are particularly preferred.
- Both an active substance and a mixture of active substances can be used or used in the process according to the invention. This can be a mixture of active substances of one class as well as a mixture of active substances of different classes.
- the microparticles can also be loaded with a mixture of different active substances.
- the organic, low molecular weight active substance is an aroma chemical, in particular an aroma chemical that is liquid at 22 ° C. and 1013 mbar or a mixture of two or more aroma chemicals that is liquid at 22 ° C. and 1013 mbar.
- Preferred aroma chemicals are hydrophobic and, particularly at 25 ° C., have a water solubility in deionized water of not more than 100 mg / L.
- the term “aroma chemical” is understood by the expert to refer to organic compounds that can be used as “fragrance and / or as“ flavor ”.
- fragment is understood to mean natural or synthetic substances with their own odor.
- the "smell” or the "olfactory perception” is the interpretation of the sensory stimuli that are delivered to the brain of a living being by the chemoreceptors of the nose or other olfactory organs. The smell can therefore be a sensory sensation of the nose of fragrance substances that occurs when inhaled.
- the air serves as an odor carrier.
- Preferred aroma chemicals for loading the microparticles are selected, for example, from the following compounds:
- volatile fragrances are fragrances that have a high vapor pressure at room temperature.
- a fragrance is particularly considered to be a volatile fragrance if it has the following property: if you drop a drop of the volatile fragrance on a strip of paper and let it evaporate at room temperature (22 ° C) under ambient conditions, its smell is at the latest for an experienced perfumer Not noticeable 2 hours after application.
- the proportion of the volatile fragrance is generally at least 1% by weight, in particular at least 5% by weight, for example 1 to 99% by weight. in particular 5 to 95% by weight, based on the total weight of the aroma chemical mixture used for loading.
- Further fragrances or aroma chemicals, with which the said fragrances can be combined to form a fragrance composition can be found, for example, in S. Arctander, Perfume and Flavor Chemicals, Vol. I and II, Montclair, NJ, 1969, Edverlag or K. Bauer , D. Garbe and H. Surburg, Common Fragrance and Flavor Materials,
- Extracts from natural raw materials such as essential oils, concretes, absolute, resin, resinoids, balms, tinctures such as
- fragrances are, for example, those from the group hydrocarbons such as 3-carene; alpha-pinene; beta-pinene; alpha terpinene; gamma terpinene; p-cymene; Bisabolene; Camphene; Caryophyllene; Cedren; Farnese; Lime; Longifolene; Myrcene; Ocimen; Valencene; (E, Z) -1, 3,5- undecatriene; Styrene; Diphenylmethane;
- aliphatic alcohols such as e.g. Hexanol; Octanol; 3-octanol; 2,6-dimethyl-heptanol; 2-methyl-2-heptanol; 2-methyl-2-octanol; (E) -2-hexenol; (E) - and (Z) -3- hexenol; 1-octen-3-ol; Mixture of 3,4,5,6,6-pentamethyl-3/4-hepten-2-ol and
- aliphatic aldehydes and their acetals such as e.g. Hexanal; Heptanal;
- aliphatic sulfur-containing compounds such as e.g. 3-methylthiohexanol
- aliphatic nitriles such as e.g. 2-nonenonitrile; 2-undecenonitrile;
- ester of aliphatic carboxylic acids such as e.g. (E) - and (Z) -3-hexenyl formate; Ethyl acetoacetate; Isoamyl acetate; Hexyl acetate; 3,5,5-trimethylhexyl acetate;
- Methyl 2-octinate Methyl 2-noninate; Allyl-2-isoamyloxyacetate; Methyl-3,7-dimethyl-
- acyclic terpene alcohols e.g. Geraniol; Nerol; Linalool; Lavadulol; Nerolidol; Farnesol; Tetrahydrolinalool; 2,6-dimethyl-7-octen-2-ol; 2,6-dimethyloctan-2-ol; 2-methyl-6-methylene-7-octen-2-ol; 2,6-dimethyl-5,7-octadien-2-ol;
- acyclic terpene aldehydes and ketones such as e.g. Geranial; Neral; Citronellal;
- Vetiverol Vetiverol; Guajol; as well as their formates, acetates, propionates, isobutyrates, butylates, isovalerianates, pentanoates, hexanoates, crotonates, tiglinates and 3-methyl
- cyclic terpene aldehydes and ketones such as e.g. Menthon; Isomenthon;
- 8-mercaptomenthan-3-one Carvon; Camphor; Fenchone; alpha-lonon; beta-lonon; alpha-n-methyl ionone; beta-n-methyl ionone; alpha-isomethylionone; beta-isomethyl ionone; alpha-lron; alpha damascon; beta-damascon; beta-damascene; delta-damascon; gamma-damascon; 1- (2,4,4-trimethyl-2-cyclohexen-1-yl) -2-buten-1-one; 1, 3,4,6,7,8a-hexahydro-1,1,5,5-tetramethyl-2H-2,4a-methanonaphthalene-8 (5H) -one; 2-methyl-4- (2,6,6-trimethyl-1-cyclohexen-1-yl) -2-butenal; Nootcat; Dihydronootcatone; 4,6,8-megastigatrien-3-one; alpha-s
- cyclic alcohols such as e.g. 4-fe / 7-butylcyclohexanol; 3,3,5-trimethylcyclohexanol; 3-isocamphylcyclohexanol; 2,6,9-trimethyl-Z2, Z5, E9-cyclododecatrien-1-ol; 2-I sobutyl-4-methyl-tetrahydro-2 H-pyran-4-ol;
- cycloaliphatic alcohols such as e.g. alpha-3,3-trimethylcyclohexylmethanol; 1- (4-isopropylcyclohexyl) ethanol; 2-methyl-4- (2,2,3-trimethyl-3-cyclopent-1-yl) butanol; 2-methyl-4- (2,2,3-trimethyl-3-cyclopent-1-yl) -2-buten-1-ol; 2-ethyl-4- (2,2,3-trimethyl-3-cyclopent-1-yl) -2-buten-1-ol; 3-methyl-5- (2,2,3-rimethyl-3-cyclopent-1-yl) pentan-2-ol; 3-methyl-5- (2,2,3-trimethyl-3-cyclopent-1-yl) -4-penten-2-ol; 3,3-dimethyl-5- (2,2,3-trimethyl-3-cyclopent-1-yl) -4-penten-2-ol;
- cyclic and cycloaliphatic ethers such as e.g. Cineol; Cedryl methyl ether; Cyclododecyl methyl ether; 1, 1-dimethoxycyclododecane; 1,4-bis (ethoxymethyl) cyclohexane; (Ethoxymethoxy) cyclododecane; alpha-cedrenepoxide;
- cycloaliphatic aldehydes such as e.g. 2,4-dimethyl-3-cyclohexenecarbaldehyde; 2-methyl-4- (2,2,6-trimethylcyclohexen-1-yl) -2-butenal; 4- (4-hydroxy-4-methylpentyl) -3-cyclohexenecarbaldehyde; 4- (4-methyl-3-penten-1-yl) -3-cyclohexenecarbaldehyde;
- cycloaliphatic ketones such as e.g. 1- (3,3-dimethylcyclohexyl) -4-penten-1-one;
- esters of cyclic alcohols such as e.g. 2-fe / 7-butylcyclohexyl acetate; 4-fe / 7-butylcyclohexyl acetate; 2-fe / 7-pentylcyclohexyl acetate; 4-th / 7-pentylcyclohexyl acetate;
- 6-indenyl propionate 4,7-methano-3a, 4,5,6,7,7a-hexahydro-5 or
- 6-indenyl isobutyrate; 4,7-methanooctahydro-5 or 6-indenyl acetate;
- ester of cycloaliphatic alcohols such as 1-cyclohexylethyl crotonate
- esters of cycloaliphatic carboxylic acids such as e.g. Allyl 3-cyclohexyl propionate; Allylcyclohexyloxyacetate; cis and / ra / 7s methyl dihydrojasmonate; cis and trans methyl jasmonate; Methyl 2-hexyl-3-oxocyclopentane carboxylate; Ethyl 2-ethyl-6,6-dimethyl-2-cyclohexenecarboxylate; Ethyl 2,3,6,6-tetramethyl-2-cyclohexene carboxylate; Ethyl 2-methyl-1, 3-dioxolane-2-acetate;
- araliphatic alcohols such as e.g. Benzyl alcohol; 1-phenylethyl alcohol, 2-phenylethyl alcohol, 3-phenylpropanol; 2-phenylpropanol; 2-phenoxyethanol;
- 2-phenylethyl isovalerate; 1 -phenylethyl acetate; alpha-trichloromethylbenzyl acetate; alpha, alpha-dimethylphenylethyl acetate; alpha, alpha-dimethyl-phenyl-ethyl butyrate; Cinnamate acetate; 2-phenoxyethyl isobutyrate; 4-methoxybenzyl acetate; the araliphatic ether such as e.g.
- aromatic and araliphatic aldehydes such as e.g. Benzaldehyde; Phenylacetaldehyde; 3-phenylpropanal; Hydratropaaldehyde; 4-methylbenzaldehyde; 4-methylphenylacetaldehyde; 3- (4-ethylphenyl) -2,2-dimethylpropanal; 2-methyl-3-
- aromatic and araliphatic ketones such as e.g. Acetophenone;
- aromatic and araliphatic carboxylic acids and their esters such as e.g.
- phenols, phenyl ethers and phenyl esters such as e.g. Estragol; Anethole; Eugenol; Eugenyl methyl ether; Isoeugenol; Isoeugenyl methyl ether; Thymol; Carvacrol; Diphenyl ether; beta-naphthyl methyl ether; beta-naphthyl ethyl ether; beta-naphthyl isobutyl ether; 1,4-dimethoxybenzene; Eugenyl acetate; 2-methoxy-4-methylphenol; 2-ethoxy-5- (1-propenyl) phenol; p-cresylphenylacetate;
- heterocyclic compounds such as e.g. 2,5-dimethyl-4-hydroxy-2H-furan-3-one; 2-ethyl-4-hydroxy-5-methyl-2H-furan-3-one; 3-hydroxy-2-methyl-4H-pyran-4-one; 2-ethyl-3-hydroxy-4H-pyran-4-one;
- lactones such as 1,4-octanolide; 3-methyl-1,4-octanolide; 1,4-nonanolide;
- 1,4-decanolide 8-decen-1,4-olide; 1,4-undecanolide; 1,4-dodecanolide;
- 1,5-decanolide 1,5-dodecanolide; 4-methyl-1,4-decanolide; 1, 15-pentadecanolide; cis- and trans-L 1-pentadecen-1, 15-olide; cis- and ra / 7s-12-pentadecen-1, 15-olide;
- Macrocyclic carbaldehyde compounds as described in WO 2016/050836 are also suitable as aroma chemicals.
- L-menthone, L-menthyl acetate, or L-isopulegol which are in great demand as analogues or substitutes for so-called synthetic dementholized oils (DMO).
- the mixtures of these minty compositions are preferably in a ratio of L-menthol or DL-menthol 20-40% by weight, L-menthone 20-40% and L-menthyl acetate 0-20% or in a ratio 20-40% by weight. %, L-menthone 20-40% and L-isopulegol 0-20%.
- flavoring agents and flavoring agent mixtures can be used as such or in a solvent, which is not a flavoring agent in itself.
- Typical solvents for flavorings are in particular those with a boiling point at normal pressure above 150 ° C and which do not dissolve the wall material, for example diols such as Propanediol and dipropylene glycol, C8-C22 fatty acid Ci-Cio-alkyl esters such as isopropyl myristate, Di-C 6 -Cio-alkyl ether, for example dicapryl ether (Cetiol® OE from BASF SE), D1-C1-C10-alkyl ester more aliphatic, more aromatic or cycloaliphatic di- or tricarboxylic acids, for example dialkyl phthalate such as dimethyl and diethyl phthalate and mixtures thereof, dialkyl hexahydrophthalate, for example dimethyl cyclohexane-1, 2-dicarbox
- Cetiol® B from BASF SE C8-C22 fatty acid triglycerides, e.g. vegetable oils or cosmetic oils such as octanoyl / decanoyl triglyceride (e.g. the commercial product Myritol® 318 from BASF SE), dimethyl sulfoxide and white oils.
- C8-C22 fatty acid triglycerides e.g. vegetable oils or cosmetic oils such as octanoyl / decanoyl triglyceride (e.g. the commercial product Myritol® 318 from BASF SE), dimethyl sulfoxide and white oils.
- the organic, low-molecular active substance is a pharmaceutical active substance, which is also referred to as an “active pharmaceutical ingredient”, or API for short.
- Pharmaceutical active substances are typically therapeutic active substances, diagnostic active substances and prophylactic active substances as well as corresponding combinations of active substances.
- the pharmaceutical active ingredient (s) can be in an amorphous state, a crystalline state or a mixture thereof.
- the pharmaceutical active ingredient (s) can be labeled with a detectable label such as a fluorescent label, a radioactive label or an enzymatic or chromatographically detectable agent and as a mixture with this marker for loading the microparticles be used.
- the API can have high water solubility, e.g. a water solubility in deionized water of more than 10 mg / ml at 25 ° C.
- Active pharmaceutical ingredients with low water solubility can also be used as active ingredients, e.g. those with a water solubility in deionized water of less than 10 mg / ml at 25 ° C.
- APIs that are suitable for parenteral administration.
- suitable API are the following categories and examples of API and alternative forms of this API such as alternative salt forms, free acid forms, free base forms and hydrates:
- Suitable pharmaceutical active ingredients are mentioned, for example, in WO 2007/070852, in particular on pages 15 to 19.
- suitable active ingredients and agents are listed in Martindale: The Extra Pharmacopoeia, 30th edition, The Pharmaceutical Press, London 1993.
- the organic, low molecular weight active substance is an organic crop protection active substance.
- Organic crop protection agents for loading the microparticles are, for example, pesticides, in particular selected from the group consisting of fungicides, insecticides, nematicides and herbicides, but also safeners, and growth regulators which can be used for loading the microparticles, also as mixtures , e.g. as mixtures of several herbicides, mixtures of several fungicides, mixtures of several insecticides, mixtures of insecticides and fungicides, mixtures of one or more herbicides with a safener and mixtures of one or more fungicides with a safener.
- the pesticides are liquid or solid at 20 ° C and 1013 mbar and are usually not volatile.
- the vapor pressure is usually below 0.1 mbar at 20 ° C., in particular below 0.01 mbar.
- Plant protection agents which are particularly suitable for loading are hydrophobic and, in particular at 25 ° C., have a water solubility in deionized water of not more than 10 g / L and in particular not more than 1 g / L.
- Plant protection agents are known to the person skilled in the art, for example from The Pesticide Manual, 17th edition, The British Crop Protection Council, London, 2015. Suitable plant protection agents are listed in particular in WO 2018/019629 on pages 10 to 15.
- suitable insecticides are compounds from the classes of carbamates, organophosphates, organochlorine insecticides, phenylpyrazoles, pyrethroids, neonicotinoids, spinosines, avermectins, milbemycins, juvenile hormone analogs, alkyl halides, organotin compounds, nereistoxin analogs, diacylhydrazines, benzoyl urea acids, benzoyl urethane substances, benzoyl urea acids, benzoyl urea compounds, and unclassified insecticides such as chloropicrin, pymetrozine, floni- camid, clofentezin, hexythiazox, etoxazole, diafenthiur
- fungicides are compounds from the classes of dinitroanilines, allylamines, anilinopyrimidines, antibiotic fungicides, aromatic hydrocarbons, benzenesulfonamides, benzimidazoles, benzisothiazoles, benzophenones, benzothiadiazoles, benzotriazines, benzylcarbamates, carbamides, carbamates, carbamates, carbamates, carbamates, carbamates, carbamates, carbamates, carbamates, carbamates , Chloronitrile, Cyanoacetamidoxime, Cyanoimidazole, Cyclopropanecarboxamide, Dicarboximide, Dihydrodioxazine, Dinitrophenylcrotonate, Dithiocarbamate, Dithiolane, Ethylphosphonate, Ethylaminothiazolecarboxamide, Guanidine, Hydroxy- (Azidoilidone), Hydroxy- (Azidilidone),
- fungicides are compounds from the classes of acetamides, amides, aryloxyphenoxypropionates, benzamides, benzofurans, benzoic acids, benzothiadiazinones, bipyridylium salts, carbamates, chloroacetamides, chlorocarboxylic acids, cyclohexanediones, dinitroanilines, dinitrophidazoles, diphenyl, neophenylphenol, diphenylphenol, diphenylphenyl, diphenyl ether, diphenylphenol, diphenyl ether, diphenylphenol, diphenyl ether, diphenylphenol, diphenyl ether, diphenylphenol, diphenyl ether, diphenyl ether Isoxazoles, isoxazolidinones, nitriles, N-phenylphthalimides, oxadiazoles, oxazolidinedi- one, oxyace
- the crop protection active ingredient is a crop protection active ingredient which is liquid at 22 ° C. and 1013 mbar or a mixture of two or more crop protection active ingredients which is liquid at 22 ° C. and 1013 mbar.
- active ingredients which are liquid at room temperature are dimethenamide, in particular its enantiomer Dimethenamid-P, clomazone, metholachlor, in particular its enantiomer S-metolachlor.
- the crop protection active ingredient is a crop protection active ingredient with low water solubility and a melting point of not more than 110 ° C. or a mixture of such active ingredients.
- the organic, low molecular weight active substance is an organic active substance suitable for cosmetic applications or an active substance mixture which is different from the previously mentioned aromatic substances.
- Preferred cosmetic active ingredients for loading the microparticles are, in particular, herbal active ingredients and plant extracts.
- cosmetic active substances are skin and hair pigmentation agents, tanning agents, bleaching agents, keratin-hardening substances, antimicrobial substances, light filter substances, repellent substances, hyperemising substances, keratolytic and keratoplastic substances, anti-dandruff substances, anti-inflammatory substances, keratinizing substances or active substances which act as radical scavengers, substances which moisturize or moisturize the skin, lipid-replenishing substances, deodorizing substances, sebostatic substances, plant extracts, anti-inflammatory or anti-allergic substances and mixtures thereof.
- Artificially tanning active ingredients that are suitable for tanning the skin without natural or artificial radiation with UV rays are, for. B. dihydroxyacetone, alloxane and walnut shell extract.
- Suitable keratin-curing substances are usually active substances, such as those used in antiperspirants, such as. As potassium aluminum sulfate, aluminum hydroxychloride, aluminum lactate, etc.
- Antimicrobial agents are used to destroy microorganisms or to inhibit their growth and thus serve both as a preservative and as a deodorant substance, which affects the development or intensity of body odor reduced. These include e.g. B.
- Suitable light filter agents are substances that absorb UV rays in the UV-B and / or UV-A range. Suitable UV filters are those mentioned above.
- Suitable repellent active ingredients are compounds that are able to deter or distribute certain animals, especially insects, from humans. This includes e.g. B. 2-ethyl-1, 3-hexanediol, N, N-diethyl-m-toluamide, etc. Suitable hyperemising substances that stimulate the blood flow to the skin are, for. B.
- essential oils such as mountain pine, lavender, rosemary, juniper berry, horse chestnut extract, birch leaf extract, hay flower extract, ethyl acetate, camphor, menthol, peppermint oil, rosemary extract, eucalyptus oil, etc.
- Suitable keratolytic and keratoplastic substances B. salicylic acid, calcium thioglycolate, thioglycolic acid and its salts, sulfur, etc.
- Suitable anti-dandruff agents are, for. B. sulfur, sulfur polyethylene glycol sorbitan monooleate, sulfur ricinol polyethoxylate, zinc pyrithione, aluminum pyrithione, etc.
- Suitable anti-inflammatory drugs that counteract skin irritation are, for. B. allantoin, bisabolol, dragosantol, chamomile extract, panthenol, etc.
- cosmetic active ingredients are aspalatin, glycyrrhizin, caffeine, proanthocianidin, hesperitin, rutin, luteolin, oleuropin, theobromine, bioflavanoids and polyphenols.
- plant extracts are also acai extract (Euterpe oleracea), acerola extract (Malpighia glabra), horsetail extract (Equisetum arvense, horsetail), agarius extract (Agarius blazei murill), aloe extract (Aloe vera, aloe barba densis), apple extract (malus), artichoke leaf extract (Cynara scolymus), artichoke flower extract (Cynara edulis), arnica extract (Arni ca Montana), oyster extract (Ostrea edulis), valerian root extract (Valeriana officinalylus) and bearberry leaf oysteri extract (u.
- John's wort extract (St. John's Wort, Hyperi- cum Perforatum), coffee concentrate, cocoa bean extract (Theobroma cacao), cactus flower extract, chamomile flower extract, Chamomomile recutita ria Chamomilla), carrot extract (Daucus carota), kiwi extract (Aperygidae), kudzu extract (Pueraria lobata), coconut milk extract, pumpkin seed extract ( Curcurbita pepo), Cornflower extract (Centaurea cyanus), Lotus flower extract, Dandelion root extract (Taraxacum officinale), Maca extract (Lepidium peruvianum), Magnolia flower extract, Mango extracts, Milk thistle extract (Silybumgianisumum) (Offisbumgianisumum) (Offsilybum maricum extract) (Sililybum maricum extract) (Sililybum maricum extract) Butcher's broom extract (Rugcus aculeatus),
- Possible polymerization catalysts are those which are suitable for curing reactive resins, in particular addition resins, condensation resins or oxidation-curing resins.
- the polymerization catalyst is a catalyst for a radical polymerization, a polycondensation and / or a polyaddition.
- Suitable catalysts for radical polymerization include, in particular, peroxide splitters, and also the catalysts known as so-called dryers or siccatives from coating technology for oxidatively drying oil and alkyd resins.
- Catalysts of silicone condensation and crosslinking are suitable as polycondensation catalysts.
- polyaddition catalysts e.g. Catalysts are used to harden epoxy resins.
- polyaddition catalysts e.g. Urethanization catalysts commonly used in polyurethane chemistry are used. These are compounds that accelerate the reaction of the reactive hydrogen atoms of isocyanate-reactive components with the organic polyisocyanates.
- Particularly suitable polymerization catalysts are amines, phosphines and organic metal salts.
- Suitable polymerization catalysts are, in particular, tertiary amines such as triethylamine, tributylamine, N, N-dimethylcyclohexylamine (DMCHA), N-methyldicyclohexylamine,
- BDMA N-dimethylbenzylamine
- N-methylmorpholine N-ethylmorpholine
- DMDEE 2,2'-dimorpholinodiethyl ether
- N, N, N ', N'-tetramethyl-1,6-hexylenediamine N, N, N', N ", N" -pentamethyldiethylene triamine (PMDETA), N, N, N ', N ", N" -pentamethyldipropylenetriamine (PMDPTA), N, N, N-tris (3-dimethylaminopropyl) amine, bis (2-dimethylaminoethyl) ether (BDMAEE),
- DBU 1,8-diazabicyclo [5.4.0] undec-7-ene
- DBN 1,5-diazabicyclo [4.3.0] non-7-ene
- Other possible polymerization catalysts are: tris (dialkylamino) -s-hexahydrotriazines, in particular 1,3,5-tris (3- [dimethylamino] propyl) hexahydro-triazine.
- Polymerization catalysts which are reactive toward isocyanates, in particular for polyadditions can also be used. In addition to at least one tertiary amino group, they contain a primary or secondary amino group or a hydroxyl group.
- Phosphines which are suitable as polymerization catalysts, in particular for polyadditions are preferably tertiary phosphines, such as triphenylphosphine or methyldiphenylphosphine.
- Organic metal salts which are suitable as polymerization catalysts preferably have the general formula
- the ligand L is an organic radical or an organic compound is selected from alkyl, alkenyl, alkynyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, alkyl heteroaryl and acyl, the ligand L having 1 to 20 carbon atoms, and the m Ligands L can be the same or different,
- n 0, 1, 2, 3, 4, 5 or 6
- M stands for a metal
- n 1, 2, 3 or 4
- the anion A- stands for a carboxylate ion, alkoxylate ion or enolate ion.
- the metal M is preferably selected from lithium, potassium, cesium, magnesium, calcium, strontium, barium, boron, aluminum, indium, tin, lead, bismuth, cerium, cobalt, iron, copper, lanthanum, manganese, mercury, scandium, titanium , Zinc and zirconium; especially among lithium, potassium, cesium, tin, bismuth, titanium, zinc and zirconium.
- the ligand L is preferably alkyl having 1 to 20 carbon atoms.
- L particularly preferably represents alkyl having 1 to 10 carbon atoms, in particular 1 to 4 carbon atoms, for example methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl or tert-butyl .
- the carboxylate ion preferably has the formula R 1 -COO, where R 1 is selected from H, alkyl, alkenyl, alkynyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, alkylheteroaryl and acyl, and the radical R 1 up to Has 20 carbon atoms, preferably 6 to 20 carbon atoms.
- Particularly preferred carboxylate ions are selected from the anions of natural and synthetic fatty acids, such as neodecanoate, isooctanoate and laurate, and the anions of resin acids and naphthenic acids.
- the enolate ion is preferably derived from one
- 1, 3-diketone with five to eight carbon atoms examples include acetylacetonate, the enolate of 2,4-hexanedione, the enolate of 3,5-heptanedione and the enolate of 3,5-octanedione.
- the alkoxylate ion preferably has the formula R 4 -0, where R 4 is selected from alkyl, alkenyl, alkynyl, aryl, arylalkyl, alkylaryl, heteroaryl, heteroarylalkyl, alkyl heteroaryl and acyl, and the radical R 4 up to 20 C atoms.
- the organic metal compound is selected from:
- Alkali carboxylates such as lithium ethylhexanoate, lithium neodecanoate, potassium acetate, potassium ethylhexanoate, cesium ethylhexanoate;
- Aluminum compounds such as aluminum acetylacetonate, aluminum dionate (e.g. K-KAT® 5218 from King Industries);
- Zinc compounds for example zinc (II) diacetate, zinc (II) ethylhexanoate and zinc (II) octoate, zinc neodecanoate, zinc acetylacetonate;
- Tin compounds such as tin (II) carboxylates, for example tin (II) acetate, tin (II) octoate, tin (II) ethylhexanoate, tin (II) neodecanoate, tin (II) isononanoate, tin (II) -Aurate and dialkyltin (IV) salts of organic carbon acids, for example dimethyltin diacetate, dibutyltin diacetate, dibutyltin dibutyrate, dibutyltin bis (2-ethylhexanoate), dibutyltin dilaurate, dibutyltin maleate, dioctyltin dilaurate and dioctyltin dilaurate;
- tin (II) carboxylates for example tin (II) acetate, tin (II) octo
- Titanium compounds such as tetra (2-ethylhexyl) titanate
- Zirconium compounds such as zirconium ethyl hexanoate, zirconium neodecanoate, zirconium acetylacetonate (e.g. K-KAT® 4205 from King Industries); Zirconium dionates (e.g. K-KAT® XC-9213; XC-A 209 and XC-6212 from King Industries); Zircon-2,2,6,6-tetramethyl-3,5-heptanedionate;
- Bismuth compounds such as bismuth carboxylates, in particular bismuth octoate,
- Bismuth ethylhexanoate, bismuth neodecanoate or bismuth pivalate e.g. K-KAT® 348, XC-B221; XC-C227, XC 8203 from King Industries, TIB KAT 716, 716LA, 716XLA, 718, 720, 789 from TIB Chemicals and those from Shepherd Lausanne);
- Manganese salts such as manganese neodecanoate, manganese naphthenate
- Cobalt salts such as cobalt neodecanoate, cobalt ethylhexanoate, cobalt naphthenate;
- Iron salts such as iron ethyl hexanoate
- Mercury compounds such as phenyl mercury carboxylate.
- Preferred organic metal compounds are dibutyltin dilaurate, dioctyltin dilaurate, zinc (II) diacetate, zinc (II) dioctoate, zirconium acetylacetonate and zirconium 2, 2,6,6-tetramethyl-3,5-heptanedionate, bismuth neodecanoate, Bismuth dioctoate and bismuth ethyl hexanoate.
- the present invention relates to a method for loading microparticles with at least one organic active substance according to method (a).
- a second group B of embodiments the present invention relates to a method for loading microparticles with at least one organic active substance according to method (b).
- the present invention relates to a method for loading microparticles with at least one organic active substance according to method (c).
- the present invention relates to a method for loading microparticles with at least one organic active substance according to method (d).
- groups A, B, C and D are preferred.
- Groups A and D are particularly preferred.
- the present invention relates to a method for loading microparticles with at least one organic active substance according to method (a) in combination with step (d2) of method (d).
- the liquid (d1) which is used for loading contains, in addition to the active substance, at least one substance A which is solid at room temperature and which is present in the liquid as a melt, emulsified, suspended or dissolved, and optionally one or more solvents.
- the active substance is typically present in these liquids in dissolved form, in emulsified form or as a melt.
- the present invention relates to a method for loading microparticles with at least one organic active substance according to method (b) in combination with step (d2) of method (d).
- the liquid (d 1) which is used for loading contains, in addition to the active substance, at least one polymerizable substance B, which is emulsified or dissolved in the liquid, and optionally one or more solvents.
- the active substance is typically present in these liquids in dissolved form, in emulsified form or as a melt.
- the present invention relates to a method for loading microparticles with at least one organic active substance according to method (c) in combination with step (d2) of method (d).
- the liquid (d1) which is used for loading contains, in addition to the active substance, at least one substance C which is dissolved or melted in the liquid and which can be solidified by adding polyvalent ions, and optionally one or more solvents .
- the active substance is typically present in these liquids in dissolved form, in emulsified form or as a melt.
- Group AD is preferred among the aforementioned groups AD, BD and CD.
- the microparticles are impregnated with a liquid (1a), (1b), (1c) or (1d), i.e. treated in such a way that the cavity present in the unfilled microparticles is partially, in particular largely, generally at least 50%, in particular at least 70%, or completely filled by the liquid (1 a), or a part, in particular that Most of the gas contained in the microparticles is displaced by the liquid.
- the liquids contain the active substance, so that when treated with the liquid, the active substance penetrates through the pores into the cavities and thus into the interior of the microparticles.
- the substance A, or B or C contained in the composition simultaneously penetrates into the cavities and thus into the interior of the Microparticles.
- the microparticles to be loaded are usually with the respective liquid which contains the active substance Bring either (1a) or (1b) or (1c) or (1d) into contact.
- the contacting can in principle take place in any desired manner, with the proviso that the contact time is sufficient that the liquid at least wets the microcapsules to be loaded and can thus penetrate into the hollow space or cavities via the pores.
- the microparticles are impregnated by suspending the microparticles in the liquid containing the active substance, usually one of the liquids (1 a), (1 b), (1 c) or (1 d).
- the microparticles are impregnated by a method in which the liquid containing the active substance, as a rule one of the liquids (1 a), (1 b), (1c) or (1 d), in finely distributed form, in particular in the form of droplets, onto which unloaded microparticles are applied.
- the microparticles will naturally be used in solid form, in particular in the form of a powder.
- the unloaded microparticles can be dripped or sprayed as a powder with the respective liquid which contains the active substance. Over- Surprisingly, the liquid droplets are quickly absorbed by the unloaded microparticles.
- the liquid used for impregnation and thus the aroma chemical can be metered precisely in this way, so that a separation of excess liquid can be avoided or the effort involved can be reduced.
- the microparticles are typically impregnated with the respective liquid (1 a), (1 b), (1 c) or (1 d) at temperatures below the melting or softening point or range of the wall material, which the person skilled in the art knows in a manner known per se, for example using dynamic differential calorimetry (DSC, differential scanning calorimetry).
- the treatment is typically carried out at temperatures which are at least 5 K, in particular at least 10 K below the melting or softening point or range of the wall material, e.g. at a maximum of 80 ° C, in particular a maximum of 70 ° C, especially a maximum of 60 ° C, e.g.
- the treatment time is typically in the range of 1 min. up to 10 h, especially in the range of 5 min. up to 8 h and especially in the range from 0.5 to 6 h.
- the active substance in the liquids (1a), (1b), (1c) or (1d) can be liquid or melted or in the presence of a solvent, a polymerizable substance B or a substance C that can be solidified by polyvalent ions are present in the liquid in liquid or molten form, in emulsified or suspended form or preferably in dissolved form.
- the active substance can also be present as such in the liquid (1d) provided that it is liquid at the temperature at which the loading takes place, e.g. in the case of an active substance or mixture of active substances which is liquid at room temperature (22 ° C.).
- the active substance is present in the liquid in liquid form or as a melt, it can be completely or partially melted.
- the active substance is preferably completely melted and in particular has a temperature of more than 5 ° C. above its melting point during loading. If the active substance is emulsified in the liquid, it can be present both as a disperse and as a continuous phase. If the active substance is in suspension, it preferably has a particle size that is smaller than the average pore radius.
- the active substance is present in solution, it can be completely or partially dissolved.
- the active substance is preferably completely dissolved.
- the solution of the active substance can in principle be brought about by all components of the liquid in which the active substance dissolves. is, for example substances (A) or (B), a solvent or solvent mixture or an optional further active substance.
- organic solvents or water or mixtures of water and water-miscible organic solvents can also be used.
- Suitable organic solvents are in particular those in which the wall material is not soluble.
- Suitable organic solvents are in particular C1-C4 alkanols such as methanol, ethanol, n-propanol, isopropanol, n-butanol, 2-butanol, tert.
- -Butanol and aliphatic and cycloaliphatic hydrocarbons such as n-pentane, n-hexane, hexane mixtures, n-heptane, cyclohexane, cycloheptane, methylcyclohexane, petroleum ether, white oils, diols such as propanediol and dipropylene glycol, C8-C22-fatty acid-Ci-Cio- alkyl esters such as isopropyl myristate, di-C 6 -Cio-alkyl ethers, for example dicapryl ether (Cetiol® OE from BASF SE), di-C i-Cio-alkyl esters of aliphatic, aromatic or cycloaliphatic di- or tricarboxylic acids, for example phthalic acid dialkyl esters such as dimethyl and Diethyl phthalate and its mixtures, dialkyl hexahydr
- the microparticles to be loaded with the active substance can be used in the form of a powder or as a suspension in a solvent in which the wall material is not soluble.
- the microparticles to be treated are preferably used in the form of a powder. This can be suspended in the respective liquid (1a), (1b), (1c) or (1d) and is preferably dripped or sprayed with the liquid. However, it is also possible to mix a suspension of the microparticles to be loaded with the liquid (1a), (1b), (1c) or (1d).
- Magnetic stirrers, rollers, shakers and various stirring elements near the wall are suitable for producing the suspension.
- the duration of the mixing process depends on the viscosity of the liquid at the loading temperature and thus on the rate of diffusion of the liquid into the microparticles and is usually 5 minutes to 12 hours.
- (1d) suspended suspended.
- the suspension comprising the microparticles and the respective liquid (1 a), (1 b), (1 c) or (1d) is generally at a temperature in the range from 0 to 80 ° C. for 1 minute to 10 Held for an hour.
- the suspension is preferably at a temperature in the range from 10 to 70 ° C. and especially in Range kept from 20 to 60 ° C for 0.5 hour to 10 hours. If necessary, the microparticles are separated from the respective liquid (1 a), (1 b), (1 c) or (1 d) added in excess.
- suitable methods are e.g. B. Filtration, centrifugation, decanting, and drying, for example contact drying, fluidized bed drying, vacuum drying or spray drying.
- the unloaded microparticles will be mixed with a liquid containing the active ingredient, e.g. impregnate one of the aforementioned liquids (1 a), (1 b), (1 c) or (1 d) by a method which is different from suspending the unloaded microparticles in a liquid which contains the active substance.
- a liquid containing the active substance e.g. Apply one of the aforementioned liquids (1 a), (1 b), (1 c) or (1 d), in finely divided form, in particular in the form of droplets, to the unloaded microparticles.
- the microparticles will be used in solid form, especially in the form of a powder.
- the unloaded microparticles will be powdered with the respective liquid containing the active substance, e.g. drop or spray the aforementioned liquids (1 a), (1 b), (1 c) or (1 d).
- the unloaded microparticles in solid form are placed in a mixer for mixing solids with liquids and the desired liquid containing the active substance, e.g. one of the aforementioned liquids (1 Add a), (1 b), (1 c) or (1 d), preferably in finely divided form, in particular in the form of droplets, for example in the form of discrete droplets or as a spray.
- the respective liquid which contains the active substance for example one of the abovementioned liquids (1 a), (1 b), (1 c) or (1 d), in finely divided form, in particular in the form of droplets, Apply to the moving microparticles to be loaded.
- the microparticles to be loaded can be moved in a suitable manner, in particular producing a fluidized bed or a fluidized bed of the microparticles to be loaded, and the respective liquid containing the active substance, for example, on the moving microparticles or in the fluidized bed or fluidized bed Apply one of the aforementioned liquids (1 a), (1 b), (1 c) or (1 d) in a finely divided form, for example by spraying or dripping on.
- the spraying on or dripping on can be carried out in a manner known per se by means of one or more nozzles, for example by means of one-substance or two-substance nozzles or by means of dripping devices.
- Suitable mixing devices are dynamic mixers, in particular compulsory mixers, or those with a mixer shaft, for example paddle mixers, paddle mixers or ploughshare mixers, but also such free-fall mixers, for example drum mixers, and fluidized bed mixers.
- the duration of the mixing process depends on the type of mixer and the viscosity of the active ingredient. the liquid at the loading temperature and thus from the rate of diffusion of the liquid into the microparticles.
- the duration required for loading can easily be determined by a person skilled in the art. It is usually 1 minute to 5 hours, in particular 2 minutes to 2 hours or 5 minutes to 1 hour.
- the particular liquid which contains the active substance is preferred, for example one of the aforementioned liquids (1 a), (1 b), (1c) or (1 d) in an amount of 0.2 to 5% by weight. Parts, preferably 0.5 to 4 parts by weight, based on 1 part by weight of the unloaded microparticles. Spraying or dropping is usually carried out at a temperature in the range from 0 to 80 ° C., in particular in the range from 10 to 70 ° C. and especially in the range from 20 to 60 ° C.
- micro-particles it is advantageous to remove any water residues still present on the micro-particles. This can e.g. by flushing with ethanol or acetone and / or the microparticles are blown dry with an inert gas such as air, nitrogen or argon. Optionally, pre-dried and / or preheated inert gases can also be used for this.
- the filled microparticles are preferably subsequently washed, preferably with an aqueous propanediol solution, for example as a 10% strength by weight solution.
- the particles can be dried by means of convective dryers such as spray dryers, fluidized bed dryers, cyclone dryers, contact dryers such as plate dryers, contact belt dryers, vacuum drying ovens or radiation dryers such as infrared rotary tube dryers and microwave mixing dryers.
- convective dryers such as spray dryers, fluidized bed dryers, cyclone dryers, contact dryers such as plate dryers, contact belt dryers, vacuum drying ovens or radiation dryers such as infrared rotary tube dryers and microwave mixing dryers.
- the liquid (1a) comprises, in addition to the active substance and the optional solvent, at least one non-polymerizable substance A which is solid at room temperature.
- the non-polymerizable substance A is selected in particular from
- organic polymers especially those that melt at a temperature in the range of 30 to 150 ° C,
- organic polymers which can be solubilized in the solvent which may be present and especially in aqueous solvents
- organic polymers that melt in the range from 30 to 150 ° C. are, in particular, aliphatic polyamides, polyethylenes, insofar as these are not waxes, polyalkylene glycols, polyisobutenes, aliphatic polyesters, polyvinyl aceta- te, poly-Ci-Cio-alkyl acrylates and aliphatic polyurethanes.
- Such polymers preferably have a number average molecular weight Mn in the range from 800 to 10,000 daltons.
- organic polymers which can be solubilized in the solvent which may be present and especially in aqueous solvents include, in particular, water-soluble neutral polymers;
- solubility data here refer to the solubility at 25 ° C and 1 bar.
- a polymer is considered to be soluble in water at the respective pH if it dissolves to at least 1 g / L.
- water-soluble neutral polymers examples are:
- poly-C2-C3-alkylene glycols such as polyethylene glycols, polypropylene glycols and polyethylene-co-polypropylene glycols, in particular block copolymers (poloxamers), graft and comb polymers with poly-C2-C3-alkylene glycols such as polyethylene glycol, polypropylene glycol or polyethylene-co-polypropylene glycol Side chains, e.g.
- Neutral modified celluloses such as hydroxypropyl methyl cellulose (HPMC), hydroxypropyl cellulose (HPC) and methyl cellulose (MC);
- Neutral, water-soluble bio-polymers in particular polysaccharide-based polymers such as alginates, pectins, gellans, carragenes, and degraded starches, as well as water-soluble proteins such as gelatin, zein and milk proteins.
- the polymers which are soluble in water at neutral or basic pH but are insoluble in water at a pH below pH 6 include, in particular, polymers with acid groups, in particular carboxylic acid groups, e.g.
- HPMCAS hydroxypropylmethylcellulose acetate succinate
- HPMCAP hydroxypropylmethylcellulose acetate phthalate
- Acidic biolpolymers especially acidic polysaccharide-based polymers such as gum arabic.
- the polymers which are insoluble in water at neutral or basic pH but soluble in water at a pH below pH 6 include, in particular, polymers with basic groups, in particular amino groups, e.g.
- Basic bio-polymers especially basic polysaccharide-based polymers such as chitosan.
- the waxes include, for example, vegetable waxes, animal waxes, mineral or fossil waxes, semi-synthetic waxes and synthetic waxes.
- Animal waxes are, for example, wool wax, china wax, beeswax and glandular fat, but also tallow and other insect waxes.
- Vegetable waxes are, for example, sugar cane wax, carnauba wax (Carnuba wax palm), candelilla wax (from various Euphorbiaceae), cork wax, guaruma wax (Calathea lutea), ouricuri wax (Syagrus coronata), Cuba palm wax (Copernicia hospita), Espartowachs , Stipa tenacissima), cotton wax, rice bran wax, flax wax, peat wax and rose wax, jasmine wax or the peetha wax from the wax squash, as well as myrtle wax (Myrica cerifera) and wax fig wax (Ficus variegata).
- mineral or fossil waxes examples include mineral oil waxes, montan waxes, ozokerite and paraffin wax.
- partially synthetic waxes are chemically treated natural waxes, for example natural waxes modified by oxidation, hydrogenation, esterification or amidation, further reaction products of wax acids with monohydric fatty or wax alcohols, amides of fatty and wax acids, reaction products of di- or triamines with vegetable or animal fatty acids, alcohol waxes and the like.
- Examples of synthetic waxes are Fischer-Tropsch waxes, polyethylene waxes, oxidized polyethylene waxes, polyvinyl ether waxes, polypropylene waxes and the like.
- Polyalkylene glycols include, for example, homopolymers and copolymers containing a large number of repeating units of the formula - (OR 1 ) -, R 1 being selected independently of one another from groups of the forms C n H2 n , where n is an integer in the range from 2 to 12, in particular represents 2, 3 or 4 and which are referred to below as poly-C2-C 4 -alkylene glycols.
- Examples of poly-C2-C 4 -alkylene glycols are polyethylene glycols and polypropylene glycols and copolymers containing polyethylene glycol and / or polypropylene glycol, in particular block copolymers of polyethylene glycol with polypropylene glycol.
- the non-polymerizable substance A is preferably selected from waxes, in particular vegetable waxes, animal waxes, polyalkylene glycols, in particular poly-C2-C 4 -alkylene glycols, and mixtures thereof.
- the non-polymerisable substance A is selected from water-soluble polymers and waxes and mixtures thereof.
- the non-polymerisable substance A is particularly preferably selected from waxes, and very particularly from beeswax, carnauba wax and polyethylene glycol.
- the mass ratio of the at least one active substance to the non-polymerisable substance A will preferably be in the range from 10:90 to 99: 1, more preferably in the range from 20:80 to 95: 5.
- the liquid (1a) preferably consists of at least 90% by weight, particularly preferably at least 98% by weight, based on the liquid
- liquid (1a) consists of
- the non-polymerisable substance A is an organic polymer that melts at a temperature in the range from 30 to 150 ° C. or is a wax
- the liquid (1 a) particularly preferably consists of at least 90% by weight. , very particularly preferably at least 98% by weight, based on the liquid, of i) the active substance and the
- the liquid (1 a) is particularly preferably at least 90% by weight, very particularly preferably at least 98% by weight, based on the liquid, out
- microparticles are treated with the liquid (1a) in the manner generally described above, in particular by spraying or dropping.
- a melt is used as the liquid (1 a), which essentially consists of at least one active substance and at least one organic polymer and / or at least one wax, the wax or the organic polymer in the Liquid in the melt or in the form of a solution in the active substance.
- the microparticles are then treated with the respective liquid (1 a) preferably at temperatures in the range from 20 to 80 ° C., in particular in the range from 30 to 70 ° C., in particular in the range from 35 to 65 ° C. and especially in the range from 40 to 60 ° C.
- a mixture of an aqueous solution or emulsion of the water-soluble polymer and the active substance is used as the liquid (1 a).
- the liquid (1b) comprises, in addition to the active substance and the optional solvent, at least one polymerizable substance B.
- the polymerizable substance B is preferably liquid at room temperature.
- the polymerizable substance B is selected, for example, from ethylenically unsaturated monomers, hydroxyl or alkoxyl groups-containing silanes and oxidatively polymerizable aromatic compounds.
- ethylenically unsaturated monomers are: i) hydrophobic monoethylenically unsaturated monomers (monomers M1), e.g .:
- esters of monoethylenically unsaturated Cs-Cs-monocarboxylic acids with C1-C30 alkanols or Cs-Cs-cycloalkanols (monomers M1.1), in particular esters of acrylic acid and / or methacrylic acid with alkanols containing 1 to 12 carbon atoms or Cycloalkanols containing 5 to 8 carbon atoms such as methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, n-butyl acrylate, n-butyl methacrylate, tert-butyl acrylate, tert-butyl methacrylate, n-hexyl acrylate, octyl acrylate, 2-ethylhexyl acrylate, 2-propylhexyl acrylate and cyclohexyl acrylate;
- esters of monoethylenically unsaturated C 4 -C 8 dicarboxylic acids with C1-C30 alkanols such as the diesters of maleic acid and fumaric acid such as diethyl maleate and diethyl fumarate;
- Cyanoacrylates (Monomers M1.3), i.e. Esters of 2-cyanopropenoic acid, for example with Ci-Cso-alkanols or Cs-Cs-cycloalkanols, e.g. Methyl cyanoacrylate and ethyl cyanoacrylate;
- vinyl aromatic hydrocarbons such as styrene
- Olefins and halogen olefins such as ethylene, propene, vinyl chloride and vinylidene chloride;
- Vinyl esters and allyl esters of saturated Ci-C30 monocarboxylic acids (monomers M1.7), such as vinyl acetate, vinyl propionate, vinyl hexanoate, vinyl octanoate and vinyl esters of versatic acids; hydrophilic monoethylenically unsaturated monomers (monomers M2), for example: monoethylenically unsaturated monocarboxylic acids with 3 to 8 carbon atoms (monomers M2.1) such as acrylic acid and methacrylic acid;
- monoethylenically unsaturated dicarboxylic acids with 4 to 8 carbon atoms such as maleic acid, itaconic acid and citraconic acid;
- N-vinyl lactams such as N-vinyl pyrrolidone, N-vinyl piperidone, N-vinyl morpholinone and N-vinyl caprolactam;
- Monoethylenically unsaturated monomers (monomers M2.5) bearing urea or keto groups such as (meth) acrylic acid [2- (2-oxo-imidazolidin-1-yl) ethyl ester, 2-ureido (meth) acrylate, N- [2 - (2-oxo-oxazolidin-3-yl) ethyl] methacrylate, acetoacetoxyethyl acrylate, acetoacetoxypropyl methacrylate, acetoacetoxybutyl methacrylate, 2- (acetoacetoxy) ethyl methacrylate, diacetone acrylamide (DAAM) and diacetone methacrylamide;
- DAAM diacetone acrylamide
- Monoethylenically unsaturated sulfonic acids and their salts such as vinylsulfonic acid, allylsulfonic acid, sulfoethyl acrylate, sulfoethyl methacrylate, sulfopropylacrylate, sulfopropyl methacrylate, 2-hydroxy-3-acryloxypropylsulfonic acid, 2-hydroxy-3-methacryloxypropylsulfonic acid, 2-styrenesulfonic acid and styrenesulfonic acid, styrenesulfonic acid, styrenesulfonic acid, styrenesulfonic acid, 2-styrenesulfonic acid, styrenesulfonic acid, 2-styrenesulfonic acid and 2-styrenesulfonic acid, -methylpropanesulfonic acid, especially its salts, especially its sodium salts; Monoethylenically unsaturated s
- esters of ethylenically unsaturated monocarboxylic acids such as acrylic acid or methacrylic acid with polyhydroxy compounds (monomers M3.1), especially aliphatic polyhydroxy compounds, with 2 to 6 OH groups, e.g. Diesters of acrylic acid with ethylene glycol, 1, 3-propanediol,
- Suitable monomers are, in particular, trimethylol propane diacrylate, trimethylol propane triacrylate, ethylene glycol diacrylate, butanediol diacrylate, hexanediol diacrylate, dipropylene glycol diacrylate, tripropylene glycol diacarylate,
- Di- and polyvinyl ethers and di- and polyallyl ethers of polyhydroxy compounds (monomers M3.2), in particular of aliphatic polyhydroxy compounds, with 2 to 6 OH groups, such as butanediol divinyl ether,
- Trimethylolpropane diallyl ether Aromatic divinyl compounds (monomers M3.3), such as divinylbenzene.
- Preferred ethylenically unsaturated monomers are those from groups M1.1,
- Silanes containing hydroxyl or alkoxyl groups are in particular compounds of the following formula (I):
- m represents a number in the range from 0 to 50;
- n 0 or 1
- p 0, 1 or 2;
- R represents H or Ci-C4-alkyl and in particular H, CH3 or C2H5;
- R stands for Ci-C4-alkyl and in particular means CH3. Preferred among these are those compounds in which k is 2 or 3 and m and n are 0, e.g. Triethoxymethylsilane, trimethoxymethylsilane, tetraethyl silicate and tetramethyl silicate.
- Aromatic compounds which can be polymerized by oxidation are those which polymerize on contact with oxygen. These include in particular phenol and compounds with a phenol structure, e.g. Phenol, hydroquinone, catechol and dopamine, and aromatic amines such as aniline and diaminobenzenes.
- the method according to the invention is carried out in such a way that the microparticles are treated such that after the cavities in the microparticles have been filled with the liquid (1b) or after the gas contained in the cavities in the microparticles has been displaced by the liquid (1b ) polymerization of substance B is effected. Any solvent contained in the liquid (1 b) is removed. The solvent, if present, can be removed before, during or after the polymerization. The polymerization leads to a solidification of substance B, in particular in the area of the pore openings, and thus to an effective sealing of the microparticles loaded with the active substance.
- the microparticles are treated with the liquid (1b) in the manner generally described above. In particular, the liquid (1 b) is sprayed or dripped onto the microparticles.
- the polymerization of substance B can be effected in a manner known per se, for example
- radical polymerization in the case of the ethylenically unsaturated compounds, e.g. by using UV radiation, optionally in the presence of photoinitiators, or by using polymerization initiators with a low decomposition temperature, e.g. by redox initiators;
- the polymerization of substance B is preferably carried out at temperatures below 80 ° C, in particular a maximum of 70 ° C, particularly preferably a maximum of 60 ° C and especially a maximum of 50 ° C, e.g. in the range from 0 to 80 ° C, in particular in the range from 0 to 70 ° C, particularly preferably in the range from 5 to 60 ° C and especially in the range from 10 to 50 ° C.
- alpha-hydroxyalkylphenones and alpha-dialkoxyacetophenones such as
- Phenylglyoxalic acid esters such as methyl phenylglyoxalate
- Benzophenones such as benzophenone, 2-hydroxybenzophenone,
- 3-hydroxybenzophenone 4-hydroxybenzophenone, 2-methylbenzophenone, 3_methylbenzophenone, 4-methylbenzophenone, 2,4-dimethylbenzophenone, 3,4-dimethylbenzophenone, 2,5-dimethylbenzophenone, 4-benzoylbiphenyl, or
- Benzene derivatives such as benzil, 4,4'-dimethylbenzil and benzil dimethyl ketal;
- Benzoins such as benzoin, benzoin ethyl ether, benzoin isopropyl ether and benzoin methyl ether; Acylphosphine oxides such as 2,4,6-trimethylbenzoyl-diphenylphosphine oxide,
- Titanocenes such as the product sold by BASF SE under the name Irgacure® 784;
- Oxime esters such as the product sold by BASF SE under the name Irgacure® OXE01 and OXE02;
- alpha-aminoalkylphenones such as 2-methyl-1- [4 (methylthio) phenyl-2-morpholino-propan-1-one, 2- (4-methylbenzyl) -2-dimethylamino-1 - (4-morpholinophenyl) -1-butanone or 2-benzyl-2-dimethylamino-1 - (4-morpholinophenyl) -1-butanone.
- Preferred photoinitiators are especially selected from the groups of alpha-hydroxyalkylphenones, alpha-dialkoxyacetophenones, phenylglyoxalic acid esters, benzophenones, benzoins and acylphosphine oxides.
- Photoinitiators are typically used in an amount of 0.1 to 5% by weight, based on the substances to be polymerized.
- Polymerization initiators are typically used in an amount of 0.1 to 5% by weight, based on the substances to be polymerized.
- Acidic catalysts are typically used in an amount of 0.01 to 3% by weight, based on the substances to be polymerized.
- Peroxides include both inorganic peroxides such as hydrogen peroxide or peroxodisulfates, for example mono- or dialkali metal or ammonium salts of peroxodisulfuric acid, for example their mono- or disodium salts, their mono- or dipotassium salts or their mono- or diammionius salts, and also organic peroxides, such as alkyl hydroperoxides and aryl hydroperoxides, for example tert-butyl hydroperoxide, p-menthyl hydroperoxide or cumyl hydroperoxide, dialkyl or diaryl peroxides, for example di-tert-butyl or dicumyl peroxides.
- inorganic peroxides such as hydrogen peroxide or peroxodisulfates, for example mono- or dialkali metal or ammonium salts of peroxodisulfuric acid, for example their mono- or disodium salts, their mono- or dipotassi
- azo compounds are, in particular, 2,2'-azobis (isobutyronitrile), 2,2'-azobis (2,4-dimethylvaleronitrile) and 2,2'-azobis (amidinopropyl) dihydrochloride (AIBA).
- Redox initiators typically include a reducing component and an oxidizing component. Examples of the latter are in particular the aforementioned peroxides, in particular hydrogen peroxide and tert-butyl hydroperoxide.
- Reducing components are, for example, sulfur compounds in which the sulfur has an oxidation number below VI, for example alkali metal sulfites, for example potassium or sodium sulfite, aluminum Potassium hydrogen sulfites, for example potassium or sodium hydrogen sulfite, alkali metal bisulfites, for example potassium or sodium metabisulfite, formaldehyde sulfoxylates, for example sodium or potassium formaldehyde sulfoxylates, alkali metal salts, especially sodium and potassium salts, aliphatic sulfinic acids and endogenous acidic acids, such as dihydric acid, di-acidic acids, such as dihydric acids, such as di-acidic acids, such as dihydric acid, eg sorbose, glucose, fructose or dihydroxyacetone.
- alkali metal sulfites for example potassium or sodium sulfite
- aluminum Potassium hydrogen sulfites for example potassium or sodium hydrogen sulfite
- iron (II) salts such as iron (II) sulfate, iron (II) ammonium sulfate or iron (II) phosphates.
- Suitable acidic catalysts are Brönstedt acids and Lewis acids, in particular aliphatic and aromatic carboxylic acids such as benzoic acid, formic acid, acetic acid, dichloroacetic acid, trifluoroacetic acid, organic sulfonic acids such as methanesulfonic acid, benzenesulfonic acid and toluenesulfonic acid, and furthermore tin (IV) compound - Genes such as dibutyltin dioctanoate, dibutyltin dilaurate and dibutyltin diethylhexanoate.
- aliphatic and aromatic carboxylic acids such as benzoic acid, formic acid, acetic acid, dichloroacetic acid, trifluoroacetic acid, organic sulfonic acids such as methanesulfonic acid, benzenesulfonic acid and toluenesulfonic acid, and furthermore tin (IV) compound - Genes such as
- the mass ratio of the at least one active substance to the polymerizable substance B in the liquid (1b) is preferably in the range from 10:90 to 99: 1, more preferably in the range from 20: 80 to 95: 5.
- the liquid (1b) preferably consists of at least 90% by weight, particularly preferably at least 98% by weight, based on the liquid
- liquid (1 b) consists of
- the liquid (1b) particularly preferably consists of at least 90% by weight, very particularly preferably at least 98% by weight, based on the liquid, of i) the active substance and the
- the liquid (1b) used is preferably an emulsion or solution which consists essentially of at least one active substance and at least one polymerizable substance B, which is preferably selected from silanes containing ethylenically unsaturated monomers, silanes containing hydroxyl or alkoxyl groups and oxidative po- polymerizable aromatic compounds, and wherein the polymerizable substance B is in the molten form or in the form of a solution in the active substance, or the active substance is dissolved in the polymerizable substance B.
- a polymerizable substance B which is preferably selected from silanes containing ethylenically unsaturated monomers, silanes containing hydroxyl or alkoxyl groups and oxidative po- polymerizable aromatic compounds, and wherein the polymerizable substance B is in the molten form or in the form of a solution in the active substance, or the active substance is dissolved in the polymerizable substance B.
- the liquid (1b) can optionally comprise a non-polymerisable substance A, the substance A being selected as described here for the liquid (1a).
- the treatment of the microparticles with the liquid (1b) is basically carried out in the manner generally described above.
- the microparticles in the liquid (1b) will be sprayed or dripped.
- the treatment of the microparticles with the liquid (1 b) is typically carried out at temperatures below the polymerization temperature of the respective system, often at a maximum of 80 ° C, in particular a maximum of 60 ° C, particularly preferably a maximum of 50 ° C and especially a maximum of 40 ° C, e.g. in the range from 0 to 80 ° C, in particular in the range from 10 to 60 ° C, in particular in the range from 15 to 50 ° C and especially in the range from 15 to 40 ° C.
- the liquid (1 c) comprises, in addition to the active substance and the optional solvent, at least one substance C which can be solidified by adding polyvalent ions.
- Substance C is typically a polymer that has a large number of anionic or acidic groups, for example carboxyl groups or sulfonic acid groups, which forms insoluble salts or complexes on contact with polyvalent ions such as Ca 2+ .
- Typical examples of such polymers are polysaccharides which carry carboxyl groups or sulfonic acid groups, for example alginates, pectins and carragens, which form and solidify on contact with polyvalent ions, for example Ca 2+ chelates.
- Further examples of such substances C are water-soluble inorganic salts which form insoluble salts with polyvalent ions, such as Ca 2+ , for example alkali metal carbonates and ammonium carbonate.
- the liquid (1 c) can optionally additionally comprise a non-polymerisable substance A, the substance A being selected as described here for the liquid (1 a).
- the mass ratio of the at least one active substance to the substance C will preferably be in the range from 10:90 to 99: 1, more preferably in the range from 20:80 to 95: 5.
- a solution of substance C in a solvent which contains the active substance in dissolved or emulsified form is preferably used as the liquid (1 c).
- the liquid (1 c) essentially consists, preferably at least 90% by weight, particularly preferably at least 98% by weight, based on the liquid, of i) the active substance,
- solvents optionally one or more solvents, in particular at least one solvent for dissolving substance C, in particular if substance C is not soluble in the active substance.
- liquid (1 c) consists of
- the liquid (1c) particularly preferably consists of at least 90% by weight, very particularly preferably at least 98% by weight, based on the liquid, of i) the active substance and the
- Suitable solvents for the liquid C are, in particular, water and aqueous mixtures which, in addition to water, contain one or more water-miscible solvents.
- Suitable organic solvents are in particular C1-C4 alkanols such as methanol, ethanol, n-propanol, isopropanol, n-butanol, 2-butanol, tert-butanol.
- the process of these groups C or CD of embodiments takes place in such a way that the microparticles are treated in such a way that, after the gas has been displaced by the liquid (1 c), they are loaded with the active substance and the substance C Microparticles a solution of multivalent ions is added to cause the precipitation of the substance C and thus its solidification. Any solvent present will be removed in a manner known per se, for example under reduced pressure.
- microparticles are treated beforehand with a solution which contains the polyvalent metal ions, in particular calcium ions, if appropriate solvents, so that solvent-free microparticles which contain the polyvalent ions are obtained, and then the treatment with the Liquid (1 c).
- the treatment of the microparticles with the liquid (1c) is basically carried out in the manner generally described above.
- the microparticles in the liquid (1 c) will be sprayed or dripped.
- the microparticles are treated with the liquid (1 c) in particular under the temperature conditions mentioned above. It is preferably carried out at temperatures of at most 80 ° C., often at most 70 ° C., preferably at most 60 ° C., in particular at most 50 ° C., for example in the range from 0 to 80 ° C., in particular in the range from 10 to 70 ° C, especially in the range of 15 to 60 ° C and especially in the range of 15 to
- the loaded microparticles will generally be brought into contact with the solution.
- the contacting can in principle take place in any desired manner, with the proviso that the contact time is sufficient, that the solution at least wets the microcapsules and can thus penetrate into the pores.
- the loaded microparticles and the solution are typically mixed together, e.g. by spraying or dropping the loaded microparticles with the solution or in particular by suspending the loaded microparticles in the solution of the polyvalent metal ions.
- the substance C is preferably solidified at temperatures of at most 80 ° C, often at most 70 ° C, preferably at most 60 ° C, in particular at most 50 ° C, e.g. in the range from 0 to 80 ° C, in particular in the range from 10 to 70 ° C, in particular in the range from 15 to 60 ° C and especially in the range from 15 to 50 ° C.
- substance C will be solidified, for example by treating the microparticles treated with the liquid (1 c) with a solution of a salt of the polyvalent ions, in particular an aqueous solution of a salt of the polyvalent ions.
- a solution of a salt of the polyvalent ions in particular an aqueous solution of a salt of the polyvalent ions.
- substance C solidifies and thus effectively seals the microparticles loaded with the active substance.
- Suitable polyvalent ions are in particular Ca 2+ , Zn 2+ , Fe 2+ and Fe 3+ , especially Ca 2+ .
- Suitable salts are in particular the halides, especially the chlorides, and the sulfates.
- the microparticles are first impregnated with the liquid (1d) in order to introduce the active substance contained therein into the cavity or cavities of the microparticles.
- the liquid (1d) contains the active substance and optionally, in particular if the active substance is solid at room temperature, additionally one or more solvents.
- the liquid (1d) can optionally additionally comprise a non-polymerisable substance A, the substance A being selected as described here for the liquid (1a).
- the liquid (1 d) can optionally be a polymerizable one Include substance B, substance B being selected as described here for the liquid (1b).
- the liquid (1d) can optionally additionally comprise a substance C, the substance C being selected as described here for the liquid (1c).
- the liquid (1d) preferably contains neither the substance (B) nor the substance (C). In particular, the liquid (1 d) contains neither substance (A), substance (B) or substance (C).
- the liquid (1d) essentially consists, preferably at least 90% by weight, particularly preferably at least 98% by weight, based on the liquid, of i) the active substance,
- the liquid (1 d) consists in particular of at least 90% by weight, particularly preferably at least 98% by weight, based on the liquid, of the active substance, which is preferably an at room temperature, i.e. at 22 ° C and 1016 mbar, is liquid active substance.
- the liquid (1d) consists of at least 90% by weight, particularly preferably at least 98% by weight, based on the liquid:
- Suitable organic solvents for the liquid (1d) are in particular those in which the wall material is not soluble.
- Suitable organic solvents are in particular Ci-C4-alkanols such as methanol, ethanol, n-propanol, isopropanol, n-butanol, 2-butanol, tert.
- -Butanol and aliphatic and cycloaliphatic hydrocarbons such as n-pentane, n-hexane, hexane mixtures, n-heptane, cyclohexane, cycloheptane, methylcyclohexane, petroleum ether, white oils, diols such as propanediol and dipropylene glycol, C8-C22 fatty acid- Ci-Cio-alkyl esters such as isopropyl myristate, di-C 6 -Cio-alkyl ether, for example dicapryl ether (Cetiol® OE from BASF SE), di-Ci-Cio-alkyl esters of aliphatic, aromatic or cycloaliphatic di- or tricarboxylic acids, for example phthal - acid dialkyl esters such as dimethyl and diethyl phthalate and their mixtures, hexahydrophthalic acid dial
- Cetiol® B from BASF SE Cs-C22 fatty acid triglycerides, e.g. vegetable oils or cosmetic oils such as octanoyl / diglyan product (cer Myritol® 318 from BASF SE), and dimethyl sulfoxide and their mixtures.
- Cs-C22 fatty acid triglycerides e.g. vegetable oils or cosmetic oils such as octanoyl / diglyan product (cer Myritol® 318 from BASF SE)
- dimethyl sulfoxide and their mixtures dimethyl sulfoxide and their mixtures.
- microparticles are treated with the liquid (1d) in the manner generally described above. In particular, you will spray or drip the microparticles in the liquid (1d).
- the microparticles are treated with the liquid (1 d) in particular under the temperature conditions mentioned above. It is preferably carried out at temperatures of at most 80 ° C, often at most 70 ° C, preferably at most 60 ° C, in particular at most 50 ° C, e.g. in the range from 0 to 80 ° C, in particular in the range from 10 to 70 ° C, in particular in the range from 15 to 60 ° C and especially in the range from 15 to 50 ° C.
- microparticles are then closed by applying a substance to the surface of the microparticles loaded with the active substance, which substance closes the pores of the loaded microparticles.
- the procedure is preferably such that a solid coating is applied to the surface of the microparticles loaded with the active substance. This coating closes the pores.
- the procedure is preferably such that this solid coating has an average layer thickness in the range from 0.005 to 0.75 times, in particular 0.025 to 0.65 times the average diameter, i.e. of the D [4,3] value, the untreated microparticles, or 0.01 to 1.5 times, in particular 0.05 to 1.3 times, the average radius of the untreated microparticles.
- the average layer thickness is usually in the range from 50 nm to 25 pm and preferably in the range from 80 nm to 8 pm.
- the mean layer thickness is preferably in the range from 0.5 pm to 25 pm.
- the mean layer thickness is preferably in the range from 50 nm to 1 pm.
- a substance can be applied to the surface of the loaded microparticles which causes the polymerisable substance B to polymerize, or a solution which contains polyvalent ions which cause the substance C to solidify. With such a procedure, the polymerization / solidification will generally take place in the area of the pore openings and thus bring about an efficient closure of the pores.
- a solid coating will be applied to the surface of the microparticles loaded with the active substance by treating the microparticles with a liquid (2d) containing a film-forming substance D in such a way that a solid layer arises on the surface of the microparticles.
- the liquid (2d) consists essentially of, preferably at least 90% by weight, particularly preferably at least 98% by weight, based on the liquid
- the liquid (2d) particularly preferably consists of at least 90% by weight, particularly preferably at least 98% by weight, based on the liquid
- ii 0 to 90% by weight, based on the liquid, of one or more solvents.
- the liquid (2d) consists in particular of at least 90% by weight, particularly preferably at least 98% by weight, based on the liquid, of the film-forming substance D.
- the liquid (2d) consists of at least 90% by weight, particularly preferably at least 98% by weight, based on the liquid:
- Suitable solvents for the liquid (2d) are those in which the film-forming substance D is soluble or solubilizable, dispersible or emulsifiable.
- solvent of the liquid should be limited to those solvents in which the wall material is not soluble. These include water and organic solvents in which the wall material is not soluble, as well as their mixtures. Suitable organic solvents are in particular Ci-C4-alkanols such as methanol, ethanol, n-propanol, isopropanol, n-butanol, 2-butanol, tert.
- -Butanol and aliphatic and cycloaliphatic hydrocarbons such as n-pentane, n-hexane, hexane mixtures, n-heptane, cyclohexane, cycloheptane, methylcyclohexane and petroleum ether, white oils, diols such as propanediol and dipropylene glycol, C8-C22-fatty acid-Ci-Cio- alkyl esters such as isopropyl myristate, di-C 6 -cio-alkyl ethers, for example dicapryl ether (Cetiol® OE from BASF SE), di-C cio-alkyl esters of aliphatic, aromatic or cycloaliphatic di- or tricarboxylic acids, for example phthalic acid dialkyl esters such as dimethyl and Diethyl phthalate and mixtures thereof, dialkyl hexahydrophthal
- film-forming substance D it can be present in the liquid (2d) in dissolved, dispersed, or liquid or melted form.
- Suitable film-forming substances D are, for example, the substances A, B and C mentioned above.
- the film-forming substance D is selected from the aforementioned non-polymerizable substances A, in particular below
- organic polymers which can be solubilized in the solvent which may be present and especially in aqueous solvents, - organic polymers which are dispersible in the solvent which may be present and particularly in aqueous solvents, and
- the film-forming substance D is preferably selected from
- Waxes in particular under vegetable waxes or animal waxes, polyalkylene glycols, in particular poly-C2-C4-alkylene glycols,
- the film-forming substance D is used in particular as a solution in a suitable solvent or as a melt.
- the film-forming substance D is selected from polymers which can be solubilized or dispersed in water.
- substance D is used in particular as a solution, emulsion or dispersion in water.
- the polymers which can be solubilized in aqueous solvents and are suitable as film-forming substances D include, in particular, those mentioned as component A.
- the polymers which are dispersible in aqueous solvents and are suitable as film-forming substances D include
- Vinyl acetate homopolymers and copolymers such as polyvinyl acetate (for example Collicoat® SR30 D from BASF SE), vinyl acetate-ethylene copolymers, vinyl acetate-vinylpyrrolidone copolymers, vinyl acetate-vinylcaprolactam copolymers, methyl methacrylate-diethylaminoethyl methacrylate copolymers, and in particular in aqueous form Polymer dispersion can be used;
- water-dispersible waxes which are typically used in the form of aqueous wax emulsions or dispersions;
- water-dispersible or swellable polysaccharides such as starch or cellulose, including modified starches and water-insoluble cellulose derivatives, e.g. hydrophobically modified starches, e.g. Ethyl cellulose and chitin and which are used in particular in the form of an aqueous suspension;
- Proteins insofar as they are not soluble in water, for example denatured proteins, e.g. Milk proteins such as casein and whey protein, wheat protein, egg protein, soy protein, peanut protein and keratin, furthermore coacervates of proteins such as gelatin A + gelatin B, gelatin B + gum arabic, gelatin A + pectin, casein + gum arabic.
- denatured proteins e.g. Milk proteins such as casein and whey protein, wheat protein, egg protein, soy protein, peanut protein and keratin, furthermore coacervates of proteins such as gelatin A + gelatin B, gelatin B + gum arabic, gelatin A + pectin, casein + gum arabic.
- the film-forming substance D is particularly preferably selected from vegetable or animal waxes, polyalkylene glycols, polyvinyl acetate and mixtures thereof, which are mentioned here. Then it is especially a wax, especially beeswax or carnauba wax.
- the film-forming substance D can, for example, also be selected from the aforementioned polymerizable substances B, the film formation then comprising a polymerization of the substance B.
- the polymerizable substance B is preferably selected from the aforementioned ethylenically unsaturated monomers, the hydroxyl or alkoxyl group-containing silanes, in particular those of the general formula (I), and oxidatively polymerizable aromatic compounds.
- the liquid (2d) consists in particular of at least 90% by weight, particularly preferably at least 98% by weight, based on the liquid, of substance B and optionally contains a substance which brings about the polymerization, for example one Photo initiator or a polymerization initiator.
- the film-forming substance D can also be selected from substances C which can be solidified by adding polyvalent metal ions, in which case the film formation requires the presence of polyvalent metal ions.
- the substance is preferably selected from alginates, pectins, and carrageenans.
- the microparticles are separated from the excess liquid (1 d) before treatment with the liquid (2d).
- the suitable methods are e.g. Filtration, centrifugation, decanting, and drying e.g. by means of convective dryers such as spray dryers, fluidized bed dryers, cyclone dryers, contact dryers such as plate dryers, contact belt dryers, vacuum drying cabinets or radiation dryers such as infrared rotary tube dryers and microwave mixing dryers.
- the amount of substance D applied and the type of treatment in step (d2) are selected so that this solid layer covers the entire surface of the respective microparticle.
- the application rate of substance D and the type of treatment are selected such that this solid layer has an average layer thickness in the range from 0.005 to 0.75 times, in particular 0.025 to 0.65 times the average diameter, i.e. of the D [4,3] value, which has microparticles, or 0.01 to 1.5 times, in particular 0.05 to 1.3 times, the average radius of the microparticles.
- the average layer thickness is usually in the range from 50 nm to 25 pm and preferably in the range from 80 nm to 8 pm.
- the mean layer thickness is preferably in the range from 0. 5 pm to 25 pm.
- the mean is preferably in the range from 0. 5 pm to 25 pm.
- Layer thickness preferably in the range from 50 nm to 1 pm.
- the amount of substance D and the type of treatment are preferably selected such that the mass ratio of the loaded microparticles used to the film-forming substance is obtained D on the particles is in the range from 95: 5 to 20:80 and in particular in the range from 90:10 to 50:50.
- the loaded microparticles will generally be brought into contact with the liquid (2d).
- the contact can be made in any way, provided that the contact time is sufficient so that the liquid (2d) at least wets the microcapsules.
- the loaded microparticles and the liquid (2d) are typically mixed together, e.g. by spraying or dropping the loaded microparticles with the liquid (2d).
- the loaded microparticles are placed in a mixer for mixing solids with liquids and the desired liquid (2d) is added, preferably in finely divided form, e.g. in the form of droplets or as a spray.
- the liquid (2d) will be applied to the loaded microparticles that are in motion.
- the microparticles can be suitably moved mechanically, e.g. by shaking or with the help of moving mixing elements, or generate a fluidized bed or a fluidized bed of the loaded microparticles and onto the micro particles so moved, e.g. to the microparticles in the fluidized bed or the fluidized bed, which apply liquid (2d) in finely divided form, in particular in droplet form, e.g.
- the fluidized bed or the fluidized bed can be mechanically e.g. be generated by rotating mixing elements or by means of a gas stream.
- Suitable mixing devices are dynamic mixers, in particular compulsory mixers, or those with a mixer shaft, e.g. Paddle mixers, paddle mixers or ploughshare mixers, but also such free-fall mixers, e.g. Drum mixers and fluid bed mixers.
- the microparticles used in step (d2) can be used in the form of a suspension of microparticles as obtained from step (d1).
- the microparticles used in step (d2) can also be used in the form of a powder.
- the powder is then preferably obtained by drying the microparticles obtained in step (d1).
- the microparticles can also be rinsed and / or washed and / or transferred to another liquid medium and / or brought into contact with them before drying.
- the untreated micro-particles are first impregnated with the liquid (1 d) in step (d1), if necessary subsequently dried, and then immediately treated with the liquid (2d).
- the microparticles in step (d1) with the liquid (1d) spray or drip and then spray or drip on the loaded microparticles thus obtained, preferably in the same device with the liquid (2d).
- the microparticles loaded with the active substance will be treated with a melt or a solution of the non-polymerisable substance A or a dispersion, in particular an aqueous dispersion of the water-insoluble film-forming polymer, e.g. by suspending the microparticles loaded with the active ingredient in the solution or the melt, or in particular by dropping or spraying the microparticles prepared in step (d1) containing the active ingredient with the solution, dispersion or melt .
- the melt cools or when the solvent is removed, the layer of the non-polymerisable substance A or of the film-forming polymer forms on the microparticles.
- the microparticles loaded with the active substance will be treated with a melt or a solution of the polymerizable substance B, e.g. by suspending the microparticles loaded with the active substance in step (d1) in the solution or the melt, or in particular by dropping the microparticles loaded with the active substance in step (d1) with the solution or the melt or sprayed.
- the polymerization of substance B is then initiated, e.g.
- the microparticles treated with it are irradiated with UV light of the appropriate wavelength, or in the case of a conventionally polymerizable composition, the microparticles treated with the liquid (2d) meet the necessary subject to agile polymerization conditions, e.g. Entry of moisture or oxygen or heating to the polymerization temperature.
- the microparticles loaded with the active substance will be treated with the liquid (2d) which contains the substance C, ie with a melt or a solution of the substance C, for example by treating the in step (d1 ) produced, loaded with the active substance microparticles in the solution or the melt of the substance C or in particular by dropping or spraying the microparticles loaded with the active substance in step (d1) with the solution or the melt of the substance C or spraying.
- substance C will be solidified, for example by treating the microparticles treated with the liquid (2d) with a solution of a salt of the polyvalent ions, in particular an aqueous solution of a salt of the polyvalent ions.
- Treatment with the solution of the polyvalent ions is typically carried out by spray the microparticles treated with the liquid (2d), or by suspending the microparticles treated with the liquid (2d) in a solution of the multivalent ions.
- Suitable polyvalent ions are in particular Ca 2+ , Zn 2+ , Fe 2+ and Fe 3+ , especially Ca 2+ .
- Suitable salts are in particular the halides, especially the chlorides, and the sulfates.
- a solid coating is applied to the surface of the microparticles loaded with the active substance by powdering the microparticles with a finely divided solid and then causing the finely divided solid to form a film.
- gel-forming organic materials for example polysaccharides such as starch, starch derivatives, cellulose, cellulose derivatives, the biodegradable polyesters mentioned above, in particular the aliphatic or partially aromatic polyesters mentioned above, e.g. PBAT and PBSeT, as well as gel-forming inorganic materials, for example pyrogenic silica, precipitated silica or phyllosilicate, in particular clay minerals, which can also be used in the form of so-called nanosilicates.
- polysaccharides such as starch, starch derivatives, cellulose, cellulose derivatives, the biodegradable polyesters mentioned above, in particular the aliphatic or partially aromatic polyesters mentioned above, e.g. PBAT and PBSeT
- gel-forming inorganic materials for example pyrogenic silica, precipitated silica or phyllosilicate, in particular clay minerals, which can also be used in the form of so-called nanosilicates.
- the particulate substances used for powdering have average particle sizes that are significantly smaller than the average diameter of the microparticles.
- the D [4, 3] value is in the range from 0.5 pm to 20 pm.
- microparticles with a D [4,3] value in the range from 2 to 50 pm, in particular with a D [4,3] value in the range from 5 to 30 pm it is preferred to use finely divided solids whose D [4, 3] is in the range of 50 nm to 1 pm.
- the loaded microparticles are placed in a mixer for the mixing of solids and the desired finely divided solid is added, for example by means of a gas stream.
- the finely divided solid will be applied to the loaded microparticles that are in motion.
- a fluidized bed or a fluidized bed of the loaded microparticles can be produced in a suitable manner and the desired finely divided solid can be applied to the microparticles located in the fluidized bed or fluidized bed.
- Suitable mixing devices are dynamic mixers, in particular compulsory mixers, or those with a mixer shaft, for example paddle mixers, paddle mixers or ploughshare mixers, but also such free-fall mixers, for example drum mixers, and fluidized bed mixers
- the film formation of the finely divided solid can be brought about, for example, by applying a substance in the manner described for liquid (2d) which causes the finely divided solid to swell or crosslink and thus form a film.
- a substance in the manner described for liquid (2d) which causes the finely divided solid to swell or crosslink and thus form a film.
- the film can be formed in a simple manner by spraying with water.
- one of the liquids (2d) described above can also be applied to the surface of the microparticles powdered with the finely divided solid, and so on cause film formation on the surface.
- a solid coating will be applied to the surface of the microparticles loaded with the active substance by separating a volatile substance from the gas phase on the surface of the microparticles and this from the surface by chemical reaction converted into a solid.
- Solid coatings can be applied to surfaces by separating volatile substances from the gas phase with chemical conversion of the volatile substance into a solid, in analogy to processes known per se, e.g. by so-called chemical vapor deposition (CVD, Chemical Vapor Deposition) or the atomic layer deposition related to it (ALD, Atomic Layer Deposition).
- CVD chemical vapor deposition
- ALD Atomic Layer Deposition
- the coating is produced via a chemical reaction of at least one volatile precursor, a so-called precursor, with another reactive substance, the coreagent, on the surface of the material to be coated, here the microparticles.
- a so-called precursor with another reactive substance, the coreagent, on the surface of the material to be coated, here the microparticles.
- the coreagent and the precursor are in the same gas phase.
- ALD the starting materials are let into the reaction chamber one after the other. Between the gas inlets of the starting materials, the reaction chamber is normally flushed with an inert gas (eg argon). In this way, the partial reactions can be clearly separated from one another and limited to the surface.
- an inert gas eg argon
- the precursor is selected such that when it reacts with the coreagent, an inorganic solid, for example an oxide, hydroxide, hydride, carbide or nitride of a metal or semimetal, or a metal or semimetal in elemental form on the surface of the Microparticle is formed.
- Typical loading Layers that can be deposited using such methods essentially consist of Al2O3, S1O2, T1O2, ZrC> 2, Hf02, Ta2C> 3, WO3, tungsten carbide, titanium carbide or silicon nitride.
- precursors are metal alkyl compounds such as trimethyl aluminum, amino metal compounds such as tetrakis (dimethylamino) titanium (TDMAT), pentakis (dimethylamino) tantalum (PDMAT) and tetrakis (dimethylamido) zirconium (TDMAZ)
- TDMAT tetrakis
- PDMAT pentakis
- PDMAT pentakis
- PDMAT pentakis
- TDMAT tetrakis (dimethylamino) tantalum
- TDMAZ tetrakis (dimethylamido) zirconium
- metal alkoxides such as tetramethylorthosilicate , Tetraethyl orthosilicate (TEOS) and zirconium tert-butoxide
- metal halides such as SnCI 4 , SÜ-I2CI2, SiHC, HfCU, WF6, TaCIs or TiCU, as well as metal
- a reaction is typically caused on the surface of the particles by a coreagent, which causes the precursor to be converted into the solid coating.
- a coreagent which causes the precursor to be converted into the solid coating.
- the type of coreagent depends in a manner known per se on the precursor and the desired coating. Examples of core agents are H2O,
- the conversion takes place at temperatures in the range of 25 to 100 ° C.
- the conversion can be promoted by plasma excitation.
- plasma excitation Such methods are familiar to the person skilled in the art. An overview of such processes can be found in K.L. Choy, Progress in Materials Science, 48 (2003), pp. 57-170.
- microparticles thus obtained contain the active substance in a form bound by the optionally polymerized substances A, B or C or in a form of the microparticles which is sealed by the application of a further substance.
- the microparticles loaded with the active substance can therefore be stored for a longer period of time without loss of active substance.
- choice of the respective substance A, B, C or D enables the targeted control of the release characteristics of the active substance from the microparticles and thus its controlled release.
- the active substance is continuously released to the surrounding medium over a longer period of time, the active substance being released to a greater extent as a rule at higher temperatures and therefore promoted by heating can be.
- the release can also be promoted by adding the microparticles with water or an aqueous solution, optionally at a pH at which the water-solubilizable polymer is soluble, is brought into contact.
- a protein is used in embodiment A, this can also be degraded enzymatically by proteases.
- the release can be promoted by damaging and / or partially or completely removing the coating or the closure of the pores produced in step (d2). This can be done, for example, with the following measures:
- the coating or the pore seal is a water-soluble polymer or a polymer that is above a certain pH or below a certain pH. Value is soluble in water.
- the destruction of the layer of the polymer and thus the release can be achieved specifically by changing the pH value;
- thermal treatment for example if substance D is a low-melting polymer or a polymer which is destroyed when heated;
- microparticle compositions Due to environmental conditions, such as occur when using the microparticle compositions or when using preparations containing the microparticle compositions, e.g. upon contact with body fluids such as sweat or urine, through exposure to light or through contact with microorganisms; such as
- the loaded microparticle compositions according to the invention are to be used in enzyme-containing preparations, for example in detergents or cleaning agents, in which the enzyme action only occurs under conditions of use.
- the Active substance for example a flavoring substance, can be released in a targeted and controlled manner during use.
- the loaded microparticle compositions according to the invention are formulated in compositions which, when used, come into contact with aqueous liquids, for example in crop protection agents or pharmaceutical dosage forms.
- aqueous liquids for example in crop protection agents or pharmaceutical dosage forms.
- the release can be achieved specifically in the stomach or intestine if the layer of film-forming substance D contains a polymer which is soluble either at acidic pH values or at basic pH values.
- Measure 4 can take place, for example, with IR radiation or by means of microwave radiation.
- the heating leads to the destruction of the layer formed by substance D, e.g. by melting or at least partially destroying substance D.
- This measure is of particular interest if the active substance is to be released by heating, e.g. the release of an aroma substance with a heating pad.
- Measure 6 is of particular interest for compositions in which a release of the active substance is only desired when the composition containing the microparticles loaded with the active substance is used. This can be, for example, in the case of microparticles which contain an aroma substance, but also clothing in the case of cosmetics which come into contact with body heat or body fluids. Measure 6 is also of interest for crop protection formulations which contain microparticles loaded with the active ingredient and for which release in the soil or on the plant is desired.
- the present invention further provides compositions of the microparticles filled with at least one active substance, which can be obtained by the process according to the invention.
- the compositions according to the invention preferably contain the active substance in a total amount of 5 to 95% by weight, based on the total weight of the microparticles loaded with the active substances, ie the constituents of the composition other than solvents.
- the constituents of the microparticles, ie the constituents of the composition that differ from solvents are essentially the active substance, the polymer which forms the wall material, the solidified substances A, B, C or D, and, if appropriate, auxiliaries which in the production of the microparticles or that are used in the loading of the microparticles and are not separated.
- the compositions according to the invention can NEN exist both as a suspension and in the form of a powder, with powder being preferred.
- the present invention further relates to agents which contain a composition according to the invention.
- Agents are preferred which contain the compositions according to the invention in a proportion by weight of 0.01 to 80% by weight, based on the total weight of the agent.
- the nature of the agent depends on the nature of the active ingredient and can be an agent that typically contains a flavoring agent, for example a perfume, a detergent, a cleaning agent, a cosmetic agent, a personal care product, a hygiene article, a food, a nutritional supplement or a fragrance dispenser.
- a flavoring agent for example a perfume, a detergent, a cleaning agent, a cosmetic agent, a personal care product, a hygiene article, a food, a nutritional supplement or a fragrance dispenser.
- the agent can also be a pharmaceutical agent, a crop protection agent or an additive intended for use in building materials.
- compositions according to the invention are used in the aforementioned agents.
- the use of compositions according to the invention in an agent is preferably selected from perfumes, detergents, cleaning agents, cosmetic agents, personal care agents, hygiene articles, foods, nutritional supplements, fragrance dispensers and fragrances.
- compositions according to the invention which contain a fragrance as an active ingredient can be used in the manufacture of perfumed articles.
- the olfactory properties as well as the material properties and the toxicological harmlessness of the compositions according to the invention underline their particular suitability for the purposes mentioned.
- compositions in conjunction with top notes of compositions, for example in the case of perfume compositions which contain dihydrorosane, rose oxides or other more volatile fragrances such as, for example, is particularly advantageous.
- B. contain iso-amyl acetate, prenyl acetate or methylheptenone. The release of the important and wished top note is effectively delayed.
- the fragrance or aroma compositions are dosed accordingly in the required amount at the required time.
- a cooling effect is also applied in a targeted manner, for example in chewing gum, confectionery, cosmetic products, technical applications such as in textiles, superabsorbents.
- Another advantage is the high material compatibility of the compositions according to the invention. with self-reactive or more unstable components such as aldehydes, esters, pyra- nes / ethers, which can show secondary reactions on the surfaces.
- compositions according to the invention are particularly preferably used in perfume products, personal care products, hygiene articles, textile detergents and in cleaning agents for solid surfaces.
- the perfumed article is e.g. selected from perfume products, personal care products, hygiene articles, textile detergents and cleaning agents for solid surfaces.
- Preferred perfumed articles according to the invention are also selected from:
- Perfume products selected from perfume extracts, eau de perfumes, eau de toilettes, eau de colognes, eau de solide, 1% perfume, air fresheners in liquid, gel-like or solid form, aerosol sprays, fragrance cleaners and oils ;
- Personal care products selected from aftershave, pre-shave products, splash colognes, solid and liquid soaps, shower gels, shampoos, shaving soaps, shaving foams, bath oils, cosmetic emulsions from oil-in-water, from water-in-oil - And of the water-in-oil-in-water type such as Skin creams and lotions, face creams and lotions, sun protection creams and lotions, after-sun creams and lotions, hand creams and lotions, foot creams and lotions, depilatory creams and lotions, after-shave creams and - lotions, tanning creams and lotions, hair care products such as Hair sprays, hair gels, setting hair lotions, hair rinses, hair shampoos, permanent and semi-permanent hair colorants, hair shaping agents such as cold waves and hair straightening agents, hair lotions, hair creams and lotions, deodorants and antiperspirants such as e.g. Armpit sprays, roll-ons, deodorant sticks, deodorant
- Hygiene articles selected from candles, lamp oils, incense sticks, fuels, rust removers, scented refreshing tissues, armpit pads, baby diapers, sanitary napkins, toilet paper, facial tissues, handkerchiefs, dishwasher ends;
- Detergents for solid surfaces selected from perfumed acidic, alkaline and neutral detergents, such as floor cleaners, window glass cleaners, dishwashing detergents, bathroom and sanitary cleaners, scouring milk, solid and liquid toilet cleaners, powder and foam-shaped carpet cleaners, waxes and polishes such as furniture polishes, floor waxes, shoe creams, disinfectants, surface disinfectants and sanitary cleaners, brake cleaners, pipe cleaners, limescale, grill and oven cleaners, algae and moss removers, mold removers, facade cleaning agents;
- perfumed acidic, alkaline and neutral detergents such as floor cleaners, window glass cleaners, dishwashing detergents, bathroom and sanitary cleaners, scouring milk, solid and liquid toilet cleaners, powder and foam-shaped carpet cleaners, waxes and polishes such as furniture polishes, floor waxes, shoe creams, disinfectants, surface disinfectants and sanitary cleaners, brake cleaners, pipe cleaners, limescale, grill and oven cleaners, algae and moss remove
- Textile detergents selected from liquid detergents, powder detergents, laundry pretreatment agents such as bleaching agents, soaking agents and stain removers, fabric softeners, washing soaps, washing tablets.
- compositions according to the invention are suitable for use in surfactant-containing perfumed articles. This is because, especially for the perfuming of formulations containing surfactants, such as cleaning agents (in particular dishwashing detergents and all-purpose cleaners), the search is frequently made for fragrances and / or fragrance compositions with a rose head note and pronounced naturalness.
- surfactants such as cleaning agents (in particular dishwashing detergents and all-purpose cleaners)
- compositions according to the invention can be used as an agent for providing (a) hair or (b) textile fibers with a rosy odor.
- compositions according to the invention are therefore particularly suitable for use in surfactant-containing perfumed articles.
- the perfumed article is one of the following:
- an acidic, alkaline or neutral cleaning agent that is selected in particular from the group consisting of all-purpose cleaners, floor cleaners, window glass cleaners, dishwashing detergents, bathroom and sanitary cleaners, scouring milk, solid and liquid toilet cleaners, powder and foam-shaped carpet cleaners, liquid Detergents, powder detergents, laundry pretreatment agents such as bleach, soaking agents and stain removers, fabric softeners, laundry soaps, washing tablets, disinfectants, surface disinfectants,
- a wax or a polish that is selected in particular from the group consisting of furniture polishes, floor waxes and shoe creams, or a personal care product that is selected in particular from the group consisting of shower gels and shampoos, shaving soaps, shaving foams, bath oils, cosmetic emulsions from oil in-water, of water-in-oil and of water-in-oil-in-water type such as Skin creams and lotions, face creams and lotions, sunscreen creams and lotions, after-sun creams
- hair care products such as hair sprays, hair gels, firm hair lotions, hair rinses, permanent and semi-permanent hair colorants, hair shaping agents such as cold waves and hair straightening agents, Hair creams and lotions, deodorants and antiperspirants such as armpit sprays, roll-ons, deodorants, deodorant creams, decorative cosmetics products.
- fragrances used according to the invention or fragrance compositions according to the invention can be combined are generally known and are described, for example, in WO 2016/050836, the teaching of which is expressly incorporated by reference.
- compositions according to the invention for the controlled release of active substances such as crop protection active substances and pharmaceutical active substances.
- Figures Figure 1 shows a scanning electron micrograph of the microparticles from Example 1.
- Figure 2 shows a scanning electron micrograph of the microparticles from preparation example 1.
- Figure 3 shows a scanning electron micrograph of the microparticles from Example 5.
- PBSA Polybutylene succinate adipinate
- PCL Polycaprolactone
- Aroma chemical mixture A water-immiscible fragrance mixture that has a fruity, pear-like note and that at 25 ° C and
- 1 bar is characterized by the following evaporation rate:
- Triglyceride mixture Myritol® 318 from BASF SE
- Polyvinyl alcohol degree of hydrolysis 88 mol%, viscosity 25 mPa * s (4% aqueous solution at 20 ° C), carboxyl group content 3 mol%
- the particle diameter of the w / o / w emulsion or the particle suspension is determined using a Malvern Mastersizer 2000 from Malvern Instruments, England, sample dispersing unit Hydro 2000S according to a standard measuring method which is documented in the literature.
- the value D [4,3] stands for the volume-weighted mean.
- microparticles are determined as powder using a Malvern Mastersizer 2000 from Fairma Malvern Instruments, England, including the Scirocco 2000 powder feed unit, according to a standard measurement method that is documented in the literature.
- the value D [4,3] stands for the volume-weighted mean.
- Production Example 1 Production of spherical fillable microparticles
- Spherical fillable microparticles were produced analogously to example 8 of WO 2018/065481.
- a polymer blend of 70% by weight of polybutylene sebacate terephthalate (PBSeT; product Ecoflex TM FS Blend A1300 from BASF SE) and 30% by weight of polylactic acid (PLA) was used as the matrix-forming polymer. The procedure was as follows:
- Pore-forming solution 0.54 kg of ammonium carbonate were dissolved in 53.5 kg of water (pore-forming agent).
- Aliphatic-aromatic polyester solution 15.1 kg of PBSeT and 6.5 kg of PLA were stirred into 270.0 kg of dichloromethane and dissolved at 25 ° C. with stirring.
- the pore-forming solution in the solution of the aliphatic-aromatic polyester was emulsified at 170 rpm with a double-stage crossbar stirrer for 15 minutes.
- the w / o emulsion obtained in this way was transferred to 423 kg of a 0.8% strength by weight aqueous polyvinyl alcohol solution and likewise emulsified with shear and energy input (one minute at 120 rpm with an impeller stirrer).
- the w / o / w emulsion thus produced was then stirred further with an impeller stirrer at 120 rpm, the pressure being reduced to 800 mbar and the jacket temperature slowly warmed to 40 ° C. and kept at this temperature for 4 hours.
- the microparticle suspension was then cooled to room temperature, filtered and dried at 37 ° C.
- the bulk density was determined in accordance with DIN EN ISO 60: 1999 and was 0.15 g / cm 3 .
- the pore size was 8.5 pm and was determined by means of mercury porosimetry. An optical evaluation was also carried out and shows an average pore size on the surface of 7 pm.
- Production Example 2 Production of spherical fillable microparticles
- Spherical fillable microparticles were produced analogously to example 8 of WO 2018/065481.
- a polymer blend of 70% by weight PBSeT and 30% by weight PBSA was used as the matrix-forming polymer. The procedure was as follows:
- Pore-forming solution 0.54 kg of ammonium carbonate were dissolved in 53.5 kg of water (pore-forming agent).
- Solution of the aliphatic-aromatic polyester 15.1 kg of PBSeT and 6.5 kg of PBSA were stirred into 270.0 kg of dichloromethane and dissolved at 25 ° C. with stirring.
- the pore-forming solution in the solution of the aliphatic-aromatic polyester was emulsified at 170 rpm with a double-stage crossbar stirrer for 15 minutes.
- the w / o emulsion obtained in this way was transferred to 423 kg of a 2.4% strength by weight aqueous polyvinyl alcohol solution and likewise emulsified with shear and energy input (one minute at 120 rpm with a round anchor stirrer).
- the w / o / w emulsion thus produced was then stirred further at 120 rpm with an impeller stirrer.
- the pressure was reduced to 800 mbar and the jacket temperature slowly warmed to 40 ° C. and held at this temperature for 4 hours.
- the microparticle suspension was then cooled to room temperature, filtered and dried at 37 ° C.
- the average particle diameter D [4,3], determined from the aqueous suspension, was 130 pm.
- Spherical fillable microparticles were produced analogously to example 8 of WO 2018/065481.
- a polymer blend of 70% by weight PBSeT and 30% by weight PCL was used as the matrix-forming polymer. The procedure was as follows:
- Pore-forming solution 0.54 kg of ammonium carbonate were dissolved in 53.5 kg of water (pore-forming agent).
- Solution of the aliphatic-aromatic polyester 15.1 kg of PBSeT and 6.5 kg of PCL were stirred into 270.0 kg of dichloromethane and dissolved at 25 ° C. with stirring.
- the pore-forming solution in the solution of the aliphatic-aromatic polyester was emulsified at 170 rpm with a double-stage crossbar stirrer for 15 minutes.
- the w / o emulsion obtained in this way was transferred to 423 kg of a 0.8% strength by weight aqueous polyvinyl alcohol solution and likewise emulsified with shear and energy input (one minute at 120 rpm with a round anchor stirrer).
- the w / o / w emulsion thus produced was then stirred further at 120 rpm with an impeller stirrer.
- the pressure was reduced to 800 mbar, and the jacket temperature was slowly warmed to 40 ° C. and held at this temperature for 4 hours.
- the microparticle suspension was then cooled to room temperature, filtered and dried at 37 ° C.
- the average particle diameter D [4,3], determined from the aqueous suspension, was 110 pm.
- a homogeneous mixture of beeswax and an aroma chemical mixture was produced by melting 5.0 g of beeswax in a water bath at 85 ° C. and adding 5.0 g of the aroma chemical mixture.
- microparticles from preparation example 1 were filled with the aroma chemical mixture in analogy to the specification of example 1, but without substance A.
- the quantitative ratios of microparticles to aroma chemical were chosen so that the same mass ratio between aroma chemical mixture and spherically fillable microparticle was obtained as in Example 1.
- 0.15 g of the aroma chemical mixture from Example 1 was added to 0.29 g of the fillable spherical Microparticles from preparation example 1 dripped while stirring. Investigation of storage stability
- Example 1 The microparticle compositions of Example 1 and Comparative Example 1 were stored together at 25.degree. C. and a relative atmospheric humidity of 50% in a climatic chamber. The decrease in mass of the aroma chemical mixture was determined by the decrease in weight of the sample. The results are summarized in Table 1. Table 1
- a homogeneous mixture of polyethylene glycol (PEG9000) and the aroma chemical mixture was produced by melting 5.0 g of PEG9000 in a water bath at 85 ° C. and adding 5.0 g of the aroma chemical mixture. From the melt produced in this way, 0.29 g was added dropwise to 0.29 g of the fillable spherical microparticles from Example 1 with stirring. The composition thus obtained was then cooled to room temperature.
- PEG9000 polyethylene glycol
- the aroma chemical mixture was produced by melting 5.0 g of PEG9000 in a water bath at 85 ° C. and adding 5.0 g of the aroma chemical mixture. From the melt produced in this way, 0.29 g was added dropwise to 0.29 g of the fillable spherical microparticles from Example 1 with stirring. The composition thus obtained was then cooled to room temperature.
- Example 2 The microparticle composition of Example 2 was stored together with the microparticle composition of Comparative Example 1 at 25 ° C. and a relative atmospheric humidity of 50% in a climatic chamber. The decrease in mass of the aroma chemical mixture was determined by the decrease in weight of the sample. The results are summarized in Table 2. Table 2
- Comparative Example 2 5.0 g of the microparticles from preparation example 1 were mixed with 20.0 g of the aroma chemical mixture on a roller mixer for five hours. The suspension was then filtered and the filter cake was rinsed three times with 10% by weight aqueous propanediol solution and then dried overnight at room temperature. The filled microparticles thus obtained, containing the aroma chemical mixture in an amount of 60%, based on the total weight of the particles, were removed and used to investigate the storage stability.
- microparticle compositions of Examples 3 and 4 were stored together with the microparticle composition of Comparative Example 2 at 25 ° C. and a relative atmospheric humidity of 50% in a climatic chamber.
- the mass decrease in the aroma chemical mixture was determined by the weight decrease in the sample.
- the mass decrease of the pure, non-encapsulated aroma chemical was examined as a reference. The results are summarized in Table 3.
- Examples 5a - 5f a) 500 g of the microparticles from preparation example 1 were placed in a ploughshare mixer and at 20 ° C. by means of a single-component nozzle with a nozzle diameter of 0.5 mm (spray pressure 2 bar) sprayed within 2 min (flow rate 500 ml / min) with 1000 g of a triglyceride mixture. 400 g of the filled microparticles obtained in this way were again placed in a ploughshare mixer and tempered by means of a single-component nozzle (spray pressure 4 bar, flow rate 100 ml / min) within 10 min at 70 ° C.
- Example 5a can be carried out in the same way with a mixture of the flavoring mixture with the triglyceride mixture. c) Example 5a can be carried out in the same way with the pure flavor mixture. d) Example 5a can in the same way with a 10 wt .-% solution of
- L-menthol can be carried out in 1, 2-propanediol.
- Example 5a can be carried out in the same way with a 10% by weight solution of Roxe oxide in 1,2-propanediol.
- Example 5a can be carried out in the same way with a 10% by weight solution of dihydro-rosan in 1,2-propanediol.
- Example 6a can be carried out in the same way with a mixture of the flavoring mixture with the triglyceride mixture. c) Example 6a can be carried out in the same way with the pure flavor mixture. d) Example 6a can in the same way with a 10 wt .-% solution of
- L-menthol can be carried out in 1, 2-propanediol.
- Example 6a can be carried out in the same way with a 10% by weight solution of Roxe oxide in 1,2-propanediol.
- Example 6a can be carried out in the same way with a 10% strength by weight solution of dihydro-rosan in 1,2-propanediol.
- Examples 7a-f a) 500 g of the microparticles from preparation example 3 were sprayed with 1000 g of a triglyceride mixture in accordance with the instructions of example 5a. 400 g of the filled microparticles obtained in this way were again placed in a ploughshare mixer and by means of a single-component nozzle (spray pressure 4 bar, flow rate 100 ml / min) within 10 min at 70 ° C. with 100 g of a beeswax melt (tempered to 75 ° C) sprayed so that a wax film forms on the microparticles. The microparticles thus obtained were cooled and discharged from the mixer.
- Example 7a can be carried out in the same way with a mixture of the flavoring mixture with the triglyceride mixture. c) Example 7a can be carried out in the same way with the pure flavor mixture. d) Example 7a can in the same way with a 10 wt .-% solution of
- L-menthol can be carried out in 1, 2-propanediol.
- Example 7a can be carried out in the same way with a 10% by weight solution of Roxe oxide in 1,2-propanediol.
- Example 7a can be carried out in the same way with a 10% by weight solution of dihydro-rosan in 1,2-propanediol.
- Example 8 500 g of the microparticles from preparation example 1 were prepared according to the instructions of example 5a with 1000 g of a mint flavor mixture consisting of 2.3% by weight of L-isopulegol and 3.1% by weight of L-methyl acetate , 36.4% by weight of L-methone and 58.2% by weight of L-menthol. 400 g of the filled microparticles thus obtained were again placed in a ploughshare mixer and by means of a single-component nozzle (spray pressure 4 bar, flow rate 100 ml / min) are sprayed within 10 min at 70 ° C with 100 g of a beeswax melt (tempered to 75 ° C), so that a wax film forms on the microparticles. The microparticles thus obtained were cooled and discharged from the mixer.
- a mint flavor mixture consisting of 2.3% by weight of L-isopulegol and 3.1% by weight of L-methyl acetate , 36.4% by weight of L-methone and
- an aroma chemical mixture was used which has a comparable evaporation characteristic to that of the aroma chemical mixture used in the other examples, but deviating from it a fruity, apple-like note.
- the microparticle composition thus obtained was stored together with the uncapsulated aroma chemical mixture at 25 ° C. and a relative atmospheric humidity of 50% in a climatic cabinet.
- the decrease in mass of the aroma chemical mixture was determined by the decrease in weight of the sample.
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Abstract
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EP4255495A1 (de) | 2020-12-03 | 2023-10-11 | Battelle Memorial Institute | Polymernanopartikel- und dna-nanostrukturzusammensetzungen und verfahren zur nichtviralen abgabe |
US20220305719A1 (en) * | 2021-03-23 | 2022-09-29 | Xerox Corporation | Piezoelectric composite filaments and use thereof in additive manufacturing |
US12031128B2 (en) | 2021-04-07 | 2024-07-09 | Battelle Memorial Institute | Rapid design, build, test, and learn technologies for identifying and using non-viral carriers |
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GB9014689D0 (en) | 1990-07-02 | 1990-08-22 | Tioxide Group Services Ltd | Supports for active entities |
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DE4440850A1 (de) | 1994-11-15 | 1996-05-23 | Basf Ag | Biologisch abbaubare Polymere, Verfahren zu deren Herstellung sowie deren Verwendung zur Herstellung bioabbaubarer Formkörper |
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DE4440858A1 (de) | 1994-11-15 | 1996-05-23 | Basf Ag | Biologisch abbaubare Polymere, Verfahren zu deren Herstellung sowie deren Verwendung zur Herstellung bioabbaubarer Formkörper |
DE19500756A1 (de) | 1995-01-13 | 1996-07-18 | Basf Ag | Biologisch abbaubare Polymere, Verfahren zu deren Herstellung sowie deren Verwendung zur Herstellung bioabbaubarer Formkörper |
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CN103894122B (zh) * | 2014-04-14 | 2015-09-16 | 浙江大学 | 可溶型药物负载微胶囊的制备方法 |
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CN108136358B (zh) * | 2015-10-22 | 2021-09-10 | 巴斯夫欧洲公司 | 制备微粒的水分散体的方法 |
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JP7069137B2 (ja) | 2016-10-07 | 2022-05-17 | ビーエーエスエフ ソシエタス・ヨーロピア | 球状微粒子 |
-
2019
- 2019-10-29 MX MX2021005126A patent/MX2021005126A/es unknown
- 2019-10-29 US US17/290,669 patent/US20210387156A1/en not_active Abandoned
- 2019-10-29 BR BR112021007656-5A patent/BR112021007656A2/pt not_active Application Discontinuation
- 2019-10-29 CN CN201980071485.4A patent/CN113164897A/zh active Pending
- 2019-10-29 EP EP19790561.5A patent/EP3873658A1/de not_active Withdrawn
- 2019-10-29 JP JP2021523299A patent/JP2022506128A/ja not_active Withdrawn
- 2019-10-29 WO PCT/EP2019/079449 patent/WO2020089191A1/de unknown
Also Published As
Publication number | Publication date |
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MX2021005126A (es) | 2021-06-15 |
WO2020089191A1 (de) | 2020-05-07 |
BR112021007656A2 (pt) | 2021-07-27 |
CN113164897A (zh) | 2021-07-23 |
JP2022506128A (ja) | 2022-01-17 |
US20210387156A1 (en) | 2021-12-16 |
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