JP2012255099A - Crosslinked polymer composition and method of producing the same - Google Patents
Crosslinked polymer composition and method of producing the same Download PDFInfo
- Publication number
- JP2012255099A JP2012255099A JP2011129211A JP2011129211A JP2012255099A JP 2012255099 A JP2012255099 A JP 2012255099A JP 2011129211 A JP2011129211 A JP 2011129211A JP 2011129211 A JP2011129211 A JP 2011129211A JP 2012255099 A JP2012255099 A JP 2012255099A
- Authority
- JP
- Japan
- Prior art keywords
- zinc
- mass
- crosslinking aid
- fine particles
- organic peroxide
- 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.)
- Granted
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 40
- 229920006037 cross link polymer Polymers 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title description 15
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 82
- 238000004132 cross linking Methods 0.000 claims abstract description 78
- 239000011701 zinc Substances 0.000 claims abstract description 58
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 49
- 239000011787 zinc oxide Substances 0.000 claims abstract description 41
- 239000002245 particle Substances 0.000 claims abstract description 37
- UOURRHZRLGCVDA-UHFFFAOYSA-D pentazinc;dicarbonate;hexahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Zn+2].[Zn+2].[Zn+2].[Zn+2].[Zn+2].[O-]C([O-])=O.[O-]C([O-])=O UOURRHZRLGCVDA-UHFFFAOYSA-D 0.000 claims abstract description 34
- 150000001451 organic peroxides Chemical class 0.000 claims abstract description 32
- 229920000642 polymer Polymers 0.000 claims abstract description 32
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000002156 mixing Methods 0.000 claims abstract description 14
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 9
- 239000010419 fine particle Substances 0.000 claims description 49
- 238000010438 heat treatment Methods 0.000 claims description 21
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 6
- RUYJNKYXOHIGPH-UHFFFAOYSA-N dialuminum;trioxido(trioxidosilyloxy)silane Chemical class [Al+3].[Al+3].[O-][Si]([O-])([O-])O[Si]([O-])([O-])[O-] RUYJNKYXOHIGPH-UHFFFAOYSA-N 0.000 claims description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 235000010755 mineral Nutrition 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- 235000014692 zinc oxide Nutrition 0.000 description 38
- 229920001971 elastomer Polymers 0.000 description 28
- 239000005060 rubber Substances 0.000 description 27
- 239000007864 aqueous solution Substances 0.000 description 25
- 230000000052 comparative effect Effects 0.000 description 22
- 230000032683 aging Effects 0.000 description 20
- 238000012360 testing method Methods 0.000 description 14
- 229920000459 Nitrile rubber Polymers 0.000 description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 11
- 238000012856 packing Methods 0.000 description 11
- 230000002378 acidificating effect Effects 0.000 description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 8
- 229920002379 silicone rubber Polymers 0.000 description 8
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 7
- 229920002943 EPDM rubber Polymers 0.000 description 7
- 239000004927 clay Substances 0.000 description 7
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 7
- 239000004945 silicone rubber Substances 0.000 description 7
- 238000004073 vulcanization Methods 0.000 description 7
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 235000021355 Stearic acid Nutrition 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 6
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 6
- 239000008117 stearic acid Substances 0.000 description 6
- 239000011593 sulfur Substances 0.000 description 6
- 229910052717 sulfur Inorganic materials 0.000 description 6
- 229920002725 thermoplastic elastomer Polymers 0.000 description 6
- 150000003751 zinc Chemical class 0.000 description 6
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 6
- 244000043261 Hevea brasiliensis Species 0.000 description 5
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 229920003052 natural elastomer Polymers 0.000 description 5
- 229920001194 natural rubber Polymers 0.000 description 5
- 229910052604 silicate mineral Inorganic materials 0.000 description 5
- 239000000377 silicon dioxide Substances 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000006229 carbon black Substances 0.000 description 4
- 238000013329 compounding Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- -1 fatty acid esters Chemical class 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 238000004898 kneading Methods 0.000 description 4
- 239000010734 process oil Substances 0.000 description 4
- 239000003566 sealing material Substances 0.000 description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 description 4
- 239000012756 surface treatment agent Substances 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- 229920003051 synthetic elastomer Polymers 0.000 description 4
- 239000005061 synthetic rubber Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000002671 adjuvant Substances 0.000 description 3
- 150000003863 ammonium salts Chemical class 0.000 description 3
- 239000007900 aqueous suspension Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 229920003193 cis-1,4-polybutadiene polymer Polymers 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 235000013305 food Nutrition 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000004014 plasticizer Substances 0.000 description 3
- 239000012266 salt solution Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000004381 surface treatment Methods 0.000 description 3
- 239000011592 zinc chloride Substances 0.000 description 3
- 235000005074 zinc chloride Nutrition 0.000 description 3
- OWRCNXZUPFZXOS-UHFFFAOYSA-N 1,3-diphenylguanidine Chemical compound C=1C=CC=CC=1NC(=N)NC1=CC=CC=C1 OWRCNXZUPFZXOS-UHFFFAOYSA-N 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N 1,4a-dimethyl-7-propan-2-yl-2,3,4,4b,5,6,10,10a-octahydrophenanthrene-1-carboxylic acid Chemical compound C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 2
- 239000004808 2-ethylhexylester Substances 0.000 description 2
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- KRADHMIOFJQKEZ-UHFFFAOYSA-N Tri-2-ethylhexyl trimellitate Chemical compound CCCCC(CC)COC(=O)C1=CC=C(C(=O)OCC(CC)CCCC)C(C(=O)OCC(CC)CCCC)=C1 KRADHMIOFJQKEZ-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 229920000800 acrylic rubber Polymers 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- HPTYUNKZVDYXLP-UHFFFAOYSA-N aluminum;trihydroxy(trihydroxysilyloxy)silane;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O[Si](O)(O)O HPTYUNKZVDYXLP-UHFFFAOYSA-N 0.000 description 2
- 239000001099 ammonium carbonate Substances 0.000 description 2
- 230000003712 anti-aging effect Effects 0.000 description 2
- 229910000420 cerium oxide Inorganic materials 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 239000010433 feldspar Substances 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 229910052621 halloysite Inorganic materials 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 229910052622 kaolinite Inorganic materials 0.000 description 2
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 229920000058 polyacrylate Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 229910052903 pyrophyllite Inorganic materials 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- ONDPHDOFVYQSGI-UHFFFAOYSA-N zinc nitrate Chemical compound [Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ONDPHDOFVYQSGI-UHFFFAOYSA-N 0.000 description 2
- WRXCBRHBHGNNQA-UHFFFAOYSA-N (2,4-dichlorobenzoyl) 2,4-dichlorobenzenecarboperoxoate Chemical compound ClC1=CC(Cl)=CC=C1C(=O)OOC(=O)C1=CC=C(Cl)C=C1Cl WRXCBRHBHGNNQA-UHFFFAOYSA-N 0.000 description 1
- RIPYNJLMMFGZSX-UHFFFAOYSA-N (5-benzoylperoxy-2,5-dimethylhexan-2-yl) benzenecarboperoxoate Chemical compound C=1C=CC=CC=1C(=O)OOC(C)(C)CCC(C)(C)OOC(=O)C1=CC=CC=C1 RIPYNJLMMFGZSX-UHFFFAOYSA-N 0.000 description 1
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 description 1
- XVYUHVUUDRFUNE-UHFFFAOYSA-N 1,3-bis(3-tert-butylperoxypropyl)benzene Chemical compound CC(C)(C)OOCCCC1=CC=CC(CCCOOC(C)(C)C)=C1 XVYUHVUUDRFUNE-UHFFFAOYSA-N 0.000 description 1
- XQUPVDVFXZDTLT-UHFFFAOYSA-N 1-[4-[[4-(2,5-dioxopyrrol-1-yl)phenyl]methyl]phenyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C(C=C1)=CC=C1CC1=CC=C(N2C(C=CC2=O)=O)C=C1 XQUPVDVFXZDTLT-UHFFFAOYSA-N 0.000 description 1
- ODBCKCWTWALFKM-UHFFFAOYSA-N 2,5-bis(tert-butylperoxy)-2,5-dimethylhex-3-yne Chemical compound CC(C)(C)OOC(C)(C)C#CC(C)(C)OOC(C)(C)C ODBCKCWTWALFKM-UHFFFAOYSA-N 0.000 description 1
- DMWVYCCGCQPJEA-UHFFFAOYSA-N 2,5-bis(tert-butylperoxy)-2,5-dimethylhexane Chemical compound CC(C)(C)OOC(C)(C)CCC(C)(C)OOC(C)(C)C DMWVYCCGCQPJEA-UHFFFAOYSA-N 0.000 description 1
- WFUGQJXVXHBTEM-UHFFFAOYSA-N 2-hydroperoxy-2-(2-hydroperoxybutan-2-ylperoxy)butane Chemical compound CCC(C)(OO)OOC(C)(CC)OO WFUGQJXVXHBTEM-UHFFFAOYSA-N 0.000 description 1
- BIISIZOQPWZPPS-UHFFFAOYSA-N 2-tert-butylperoxypropan-2-ylbenzene Chemical compound CC(C)(C)OOC(C)(C)C1=CC=CC=C1 BIISIZOQPWZPPS-UHFFFAOYSA-N 0.000 description 1
- FRIBMENBGGCKPD-UHFFFAOYSA-N 3-(2,3-dimethoxyphenyl)prop-2-enal Chemical compound COC1=CC=CC(C=CC=O)=C1OC FRIBMENBGGCKPD-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- FMRLDPWIRHBCCC-UHFFFAOYSA-L Zinc carbonate Chemical compound [Zn+2].[O-]C([O-])=O FMRLDPWIRHBCCC-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 235000012501 ammonium carbonate Nutrition 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 235000019400 benzoyl peroxide Nutrition 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 230000002612 cardiopulmonary effect Effects 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- YACLQRRMGMJLJV-UHFFFAOYSA-N chloroprene Chemical compound ClC(=C)C=C YACLQRRMGMJLJV-UHFFFAOYSA-N 0.000 description 1
- 229920003211 cis-1,4-polyisoprene Polymers 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229920005555 halobutyl Polymers 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 229920003192 poly(bis maleimide) Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920005989 resin Chemical class 0.000 description 1
- 239000011347 resin Chemical class 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- PNWOTXLVRDKNJA-UHFFFAOYSA-N tert-butylperoxybenzene Chemical compound CC(C)(C)OOC1=CC=CC=C1 PNWOTXLVRDKNJA-UHFFFAOYSA-N 0.000 description 1
- 229940070710 valerate Drugs 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 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
- UGZADUVQMDAIAO-UHFFFAOYSA-L zinc hydroxide Chemical compound [OH-].[OH-].[Zn+2] UGZADUVQMDAIAO-UHFFFAOYSA-L 0.000 description 1
- 229940007718 zinc hydroxide Drugs 0.000 description 1
- 229910021511 zinc hydroxide Inorganic materials 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 229960001763 zinc sulfate Drugs 0.000 description 1
- 229910000368 zinc sulfate Inorganic materials 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
本発明は、有機過酸化物を架橋剤として用い架橋させた架橋ポリマー組成物及びその製造方法に関するものである。 The present invention relates to a crosslinked polymer composition crosslinked using an organic peroxide as a crosslinking agent and a method for producing the same.
近年、自動車のエンジンルーム周辺の雰囲気温度の上昇や、コンピューターの情報処理速度の増加に伴い、耐熱性に優れたポリマーの要求が高まっている。 In recent years, with an increase in the ambient temperature around the engine room of an automobile and an increase in the information processing speed of a computer, a demand for a polymer having excellent heat resistance is increasing.
耐熱性を高めるため、架橋ポリマーにおいては、架橋剤として硫黄ではなく、有機過酸化物が採用されることが多くなってきている(特許文献1)。 In order to increase heat resistance, organic peroxides are increasingly used as cross-linking agents instead of sulfur in cross-linked polymers (Patent Document 1).
また、耐熱性を向上させるため、酸化セリウムなどの金属酸化物を配合させることが検討されている(特許文献2)。 Moreover, in order to improve heat resistance, mixing metal oxides, such as a cerium oxide, is examined (patent document 2).
自動車等の燃料の輸送等に用いられる燃料系ゴムホースにおいては、原料のポリマー自身に耐熱性の高いものが使用されている(特許文献3)。 In a fuel-based rubber hose used for transportation of fuel such as an automobile, a material polymer having high heat resistance is used (Patent Document 3).
本発明の目的は、耐熱老化性等に優れた架橋ポリマー組成物及びその製造方法を提供することにある。 An object of the present invention is to provide a crosslinked polymer composition excellent in heat aging resistance and the like and a method for producing the same.
本発明の架橋ポリマー組成物は、珪酸塩粒子の表面に酸化亜鉛微粒子または塩基性炭酸亜鉛微粒子を担持させた亜鉛系架橋助剤と、架橋剤としての有機過酸化物とをポリマーに配合し、有機過酸化物によって架橋させたことを特徴としている。 The crosslinked polymer composition of the present invention is prepared by blending a polymer with a zinc-based crosslinking aid in which zinc oxide fine particles or basic zinc carbonate fine particles are supported on the surface of silicate particles, and an organic peroxide as a crosslinking agent. It is characterized by being crosslinked with an organic peroxide.
本発明に従う架橋助剤を用いることにより、架橋密度を高めることができ、耐熱老化性等に優れた架橋ポリマー組成物とすることができる。 By using the crosslinking aid according to the present invention, the crosslinking density can be increased and a crosslinked polymer composition excellent in heat aging resistance and the like can be obtained.
本発明においては、ポリマー100質量部に対し、亜鉛系架橋助剤が0.5〜10質量部の範囲で配合されていることが好ましい。 In this invention, it is preferable that the zinc type crosslinking adjuvant is mix | blended in the range of 0.5-10 mass parts with respect to 100 mass parts of polymers.
また、本発明においては、ポリマー100質量部に対し、有機過酸化物が0.5〜10質量部の範囲で配合されていることが好ましい。 Moreover, in this invention, it is preferable that the organic peroxide is mix | blended in the range of 0.5-10 mass parts with respect to 100 mass parts of polymers.
本発明における亜鉛系架橋助剤中の酸化亜鉛微粒子または塩基性炭酸亜鉛微粒子の担持量は、金属亜鉛換算で6〜75質量%の範囲であることが好ましい。 The supported amount of zinc oxide fine particles or basic zinc carbonate fine particles in the zinc-based crosslinking aid in the present invention is preferably in the range of 6 to 75% by mass in terms of metallic zinc.
本発明において、珪酸塩粒子としては、例えば、無水珪酸アルミニウム塩鉱物粒子を挙げることができる。 In the present invention, examples of the silicate particles include anhydrous aluminum silicate mineral particles.
本発明の製造方法は、上記本発明の架橋ポリマー組成物を製造することができる方法であり、ポリマーに亜鉛系架橋助剤及び有機過酸化物を配合する工程と、亜鉛系架橋助剤及び有機過酸化物を配合したポリマーを加熱して、有機過酸化物によってポリマーを架橋する工程を備えることを特徴としている。 The production method of the present invention is a method capable of producing the above-mentioned crosslinked polymer composition of the present invention, a step of blending a polymer with a zinc-based crosslinking aid and an organic peroxide, a zinc-based crosslinking aid and an organic It is characterized by comprising a step of heating a polymer containing a peroxide and crosslinking the polymer with an organic peroxide.
本発明によれば、耐熱老化性等に優れた架橋ポリマー組成物とすることができる。 According to the present invention, a crosslinked polymer composition having excellent heat aging resistance and the like can be obtained.
本発明の製造方法によれば、耐熱老化性等に優れた架橋ポリマー組成物を効率良く製造することができる。 According to the production method of the present invention, a crosslinked polymer composition excellent in heat aging resistance and the like can be efficiently produced.
以下、本発明をさらに詳細に説明する。 Hereinafter, the present invention will be described in more detail.
<亜鉛系架橋助剤>
本発明において使用する亜鉛系架橋助剤としては、珪酸塩粒子の表面に酸化亜鉛微粒子または塩基性炭酸亜鉛微粒子を担持させたものが使用される。珪酸塩粒子の表面は、酸化亜鉛微粒子及び塩基性炭酸亜鉛微粒子に対して親和性を有しており、このため均一に酸化亜鉛微粒子または塩基性炭酸亜鉛微粒子を担持させることができる。
<Zinc-based crosslinking aid>
As the zinc-based crosslinking aid used in the present invention, those in which zinc oxide fine particles or basic zinc carbonate fine particles are supported on the surface of silicate particles are used. The surface of the silicate particles has an affinity for the zinc oxide fine particles and the basic zinc carbonate fine particles, and therefore, the zinc oxide fine particles or the basic zinc carbonate fine particles can be uniformly supported.
酸化亜鉛微粒子または塩基性炭酸亜鉛微粒子の担持量は、金属亜鉛換算で6〜75質量%の範囲であることが好ましい。ここで、金属亜鉛換算の担持量とは、担持している酸化亜鉛微粒子または塩基性炭酸亜鉛微粒子を金属亜鉛に換算したZn換算質量を算出し、この値を用いて、以下の式から算出することができる。 The supported amount of zinc oxide fine particles or basic zinc carbonate fine particles is preferably in the range of 6 to 75% by mass in terms of metallic zinc. Here, the supported amount in terms of metal zinc is calculated from the following equation using the calculated Zn equivalent mass obtained by converting the supported zinc oxide fine particles or basic zinc carbonate fine particles to metal zinc. be able to.
金属亜鉛換算の担持量(質量%)=〔(Zn換算質量)/(亜鉛系架橋助剤の質量)〕×100 Metal zinc equivalent loading (mass%) = [(Zn equivalent mass) / (mass of zinc-based crosslinking aid)] × 100
担持量が上記範囲よりも少ないと、十分に架橋密度を高めることができず、良好な耐熱老化性等を得ることができない場合がある。また、担持量が上記の範囲よりも多すぎても、それに伴う効果が得られず、経済的に不利になる場合がある。 If the supported amount is less than the above range, the crosslinking density cannot be sufficiently increased, and good heat aging resistance or the like may not be obtained. Moreover, even if there is too much carrying amount than said range, the effect accompanying it may not be acquired but it may become economically disadvantageous.
酸化亜鉛微粒子を担持した珪酸塩粒子のBET比表面積は、10〜55m2/gの範囲であることが好ましく、さらに好ましくは15〜50m2/gの範囲であり、さらに好ましくは20〜45m2/gの範囲である。 BET specific surface area of the silicate particles carrying the zinc oxide fine particles is preferably in the range of 10~55m 2 / g, more preferably in the range of 15 to 50 m 2 / g, more preferably 20~45M 2 / G.
塩基性炭酸亜鉛微粒子を担持した珪酸塩粒子のBET比表面積は、25〜90m2/gの範囲であることが好ましく、さらに好ましくは30〜85m2/gであり、さらに好ましくは35〜80m2/gの範囲である。 It is preferable that the BET specific surface area of the silicate particle | grains which carry | supported the basic zinc carbonate fine particle is the range of 25-90 m < 2 > / g, More preferably, it is 30-85 m < 2 > / g, More preferably, it is 35-80 m < 2 >. / G.
塩基性炭酸亜鉛微粒子の方が、酸化亜鉛微粒子よりも微細であり、BET比表面積の高い微粒子とすることができる。このため、上記のように、塩基性炭酸亜鉛微粒子を担持した場合、酸化亜鉛微粒子を担持した場合に比べ、BET比表面積が高くなっている。 Basic zinc carbonate fine particles are finer than zinc oxide fine particles, and can be fine particles having a high BET specific surface area. Therefore, as described above, when the basic zinc carbonate fine particles are supported, the BET specific surface area is higher than when the zinc oxide fine particles are supported.
BET比表面積は、BET比表面積測定装置を用い、窒素吸着法により求めることができる。珪酸塩粒子に担持させた酸化亜鉛微粒子及び塩基性炭酸亜鉛微粒子のBET比表面積(BETZn)は、以下の式により算出することができる。 The BET specific surface area can be determined by a nitrogen adsorption method using a BET specific surface area measuring device. The BET specific surface area (BET Zn ) of the zinc oxide fine particles and basic zinc carbonate fine particles supported on the silicate particles can be calculated by the following formula.
BETZn={(BETZn−Si×WZn)+WSi(BETZn−Si−BETSi)}/WZn
BETZn−Si:亜鉛系架橋助剤のBET比表面積
BETSi:珪酸塩粒子のBET比表面積
WZn:亜鉛系架橋助剤中に含まれる酸化亜鉛または塩基性炭酸亜鉛の質量%
WSi:亜鉛系架橋助剤中に含まれる珪酸塩粒子の質量%
BET Zn = {(BET Zn- Si × W Zn) + W Si (BET Zn-Si -BET Si)} / W Zn
BET Zn—Si : BET specific surface area of zinc-based crosslinking aid BET Si : BET specific surface area of silicate particles W Zn : Mass% of zinc oxide or basic zinc carbonate contained in zinc-based crosslinking aid
W Si : Mass% of silicate particles contained in zinc-based crosslinking aid
珪酸塩粒子の表面に担持される酸化亜鉛微粒子及び塩基性炭酸亜鉛微粒子のBET比表面積(BETZn)は、酸化亜鉛微粒子の場合、15〜100m2/gの範囲であることが好ましく、塩基性炭酸亜鉛微粒子の場合、15〜100m2/gの範囲であることが好ましい。 In the case of zinc oxide fine particles, the BET specific surface area (BET Zn ) of the zinc oxide fine particles and the basic zinc carbonate fine particles supported on the surface of the silicate particles is preferably in the range of 15 to 100 m 2 / g. In the case of zinc carbonate fine particles, the range is preferably from 15 to 100 m 2 / g.
亜鉛系架橋助剤に関し、そのBET比表面積が低くなりすぎると、十分な架橋が得られず、耐熱老化性等を十分に向上させることができない場合がある。また、BET比表面積が高くなりすぎると、担持されないフリーの酸化亜鉛微粒子または塩基性炭酸亜鉛微粒子が混在し、これが凝集粒子となり、均一な架橋構造を形成できない場合がある。また、相対的に酸化亜鉛または塩基性炭酸亜鉛の担持量が多くなるため、経済的なメリットが得られにくくなる場合がある。 Regarding the zinc-based crosslinking aid, if the BET specific surface area is too low, sufficient crosslinking may not be obtained, and the heat aging resistance and the like may not be sufficiently improved. Moreover, when the BET specific surface area becomes too high, free zinc oxide fine particles or basic zinc carbonate fine particles that are not supported are mixed, which become aggregated particles, and a uniform cross-linked structure may not be formed. Moreover, since the carrying amount of zinc oxide or basic zinc carbonate is relatively increased, it may be difficult to obtain an economic merit.
本発明における珪酸塩粒子としては、珪酸アルミニウム塩鉱物粒子が好ましく用いられる。また、珪酸アルミニウム塩鉱物粒子以外の珪酸塩粒子としては、タルク、マイカ、長石、ベントナイト、珪酸マグネシウム、シリカ、珪酸カルシウム(ワラストナイト)、珪藻土などが挙げられる。 As the silicate particles in the present invention, aluminum silicate mineral particles are preferably used. Examples of the silicate particles other than the aluminum silicate mineral particles include talc, mica, feldspar, bentonite, magnesium silicate, silica, calcium silicate (wollastonite), and diatomaceous earth.
本発明における珪酸アルミニウム塩鉱物粒子としては、例えば、カオリナイト、ハロイサイト、パイロフィライト、及びセリサイトから選ばれる少なくとも1種が挙げられる。 Examples of the aluminum silicate salt mineral particles in the present invention include at least one selected from kaolinite, halloysite, pyrophyllite, and sericite.
本発明において、珪酸アルミニウム塩鉱物粒子は、好ましくは無水珪酸アルミニウム塩鉱物粒子である。無水珪酸アルミニウム塩鉱物粒子としては、例えば、カオリナイト、ハロイサイト、パイロフィライト、及びセリサイトから選ばれる少なくとも1種を焼成したものが挙げられる。例えば、粒径2μm以下の含有率が80%以上である微細粒子からなるこれらの粘土鉱物を、500〜900℃の温度で焼成したものが挙げられる。 In the present invention, the aluminum silicate mineral particles are preferably anhydrous aluminum silicate mineral particles. Examples of anhydrous aluminum silicate salt particles include those obtained by firing at least one selected from kaolinite, halloysite, pyrophyllite, and sericite. For example, those obtained by firing these clay minerals composed of fine particles having a particle size of 2 μm or less having a content of 80% or more at a temperature of 500 to 900 ° C. can be mentioned.
本発明の亜鉛系架橋助剤は、例えば、珪酸塩粒子の存在下に、亜鉛塩の酸性水溶液とアルカリ性水溶液とを混合して、酸化亜鉛微粒子または塩基性炭酸亜鉛を析出させ、珪酸塩粒子の表面に、酸化亜鉛微粒子または塩基性炭酸亜鉛を担持させて製造することができる。 The zinc-based crosslinking aid of the present invention, for example, in the presence of silicate particles, by mixing an acidic aqueous solution and an alkaline aqueous solution of zinc salt to precipitate zinc oxide fine particles or basic zinc carbonate, It can be produced by supporting zinc oxide fine particles or basic zinc carbonate on the surface.
珪酸塩粒子の存在下に、亜鉛塩の酸性水溶液とアルカリ性水溶液を混合して、酸化亜鉛微粒子または塩基性炭酸亜鉛微粒子を析出させる方法としては、具体的には以下のような方法が挙げられる。 Specific examples of a method for depositing zinc oxide fine particles or basic zinc carbonate fine particles by mixing an acidic aqueous solution and an alkaline aqueous solution of zinc salt in the presence of silicate particles include the following methods.
(1)亜鉛塩の酸性水溶液中に珪酸塩粒子を分散させておき、この分散液に、アルカリ性水溶液を添加する。 (1) Silicate particles are dispersed in an acidic aqueous solution of zinc salt, and an alkaline aqueous solution is added to the dispersion.
(2)アルカリ性水溶液に珪酸塩粒子を分散させておき、この分散液に、亜鉛塩の酸性水溶液を添加する。 (2) Silicate particles are dispersed in an alkaline aqueous solution, and an acidic aqueous solution of zinc salt is added to the dispersion.
(3)水中に珪酸塩粒子を分散させておき、この分散液に、亜鉛塩の酸性水溶液とアルカリ性水溶液とを同時に添加する。 (3) Silicate particles are dispersed in water, and an acidic aqueous solution and an alkaline aqueous solution of zinc salt are simultaneously added to the dispersion.
上記の(1)〜(3)の方法の内、特に好ましくは(1)の方法が採用される。 Of the above methods (1) to (3), the method (1) is particularly preferably employed.
亜鉛塩の酸性水溶液は、例えば、酸性水溶液中に、酸化亜鉛、水酸化亜鉛、塩基性炭酸亜鉛、硫酸亜鉛、硝酸亜鉛などを添加して調製することができる。酸化亜鉛としては、各種工業原料として用いられている亜鉛華を用いてもよい。酸性水溶液としては、塩酸、硫酸、硝酸、炭酸などの水溶液が挙げられる。また、塩化亜鉛などの水溶性亜鉛化合物を酸性水溶液中に添加して調製してもよい。 The acidic aqueous solution of zinc salt can be prepared, for example, by adding zinc oxide, zinc hydroxide, basic zinc carbonate, zinc sulfate, zinc nitrate or the like to the acidic aqueous solution. As zinc oxide, zinc white used as various industrial raw materials may be used. Examples of the acidic aqueous solution include aqueous solutions of hydrochloric acid, sulfuric acid, nitric acid, carbonic acid, and the like. Moreover, you may prepare by adding water-soluble zinc compounds, such as a zinc chloride, in acidic aqueous solution.
アルカリ性水溶液としては、例えば、水酸化ナトリウム、水酸化カリウム、炭酸ナトリウムなどの水溶液が挙げられる。一般に、水酸化ナトリウム、水酸化カリウムなどをアルカリ性水溶液として用いた場合には、酸化亜鉛微粒子を析出させて担持させることができる。また、酸性水溶液として炭酸を用いた場合や、アルカリ性水溶液として炭酸ナトリウムなどを用いた場合には、塩基性炭酸亜鉛を析出させて担持させることができる。 Examples of the alkaline aqueous solution include aqueous solutions of sodium hydroxide, potassium hydroxide, sodium carbonate, and the like. In general, when sodium hydroxide, potassium hydroxide or the like is used as an alkaline aqueous solution, zinc oxide fine particles can be deposited and supported. Further, when carbonic acid is used as the acidic aqueous solution or when sodium carbonate or the like is used as the alkaline aqueous solution, basic zinc carbonate can be deposited and supported.
また、塩基性炭酸亜鉛を担持した珪酸塩粒子は、上述のように、酸化亜鉛微粒子を担持した珪酸塩粒子をアンモニウム塩水溶液で処理する方法または、酸化亜鉛微粒子を担持した珪酸塩粒子の水懸濁液に炭酸ガスを導入して炭酸化を行うなどの方法で処理することにより、担持された酸化亜鉛微粒子を塩基性炭酸亜鉛微粒子に変換することにより製造することができる。これら処理方法は単独で行ってもよいし、両方法を併用してもよい。 In addition, as described above, the silicate particles supporting basic zinc carbonate are prepared by a method of treating silicate particles supporting zinc oxide fine particles with an aqueous ammonium salt solution or water suspension of silicate particles supporting zinc oxide fine particles. It can be produced by converting the supported zinc oxide fine particles into basic zinc carbonate fine particles by treating with a method such as carbonation by introducing carbon dioxide into the suspension. These treatment methods may be carried out singly or in combination.
アンモニウム塩水溶液としては、水酸化アンモニウム、炭酸水素アンモニウム、炭酸アンモニウムなどの水溶液が挙げられる。これらは単独で用いてもよいし、2種以上を併用してもよい。 Examples of the aqueous ammonium salt solution include aqueous solutions of ammonium hydroxide, ammonium hydrogen carbonate, ammonium carbonate, and the like. These may be used alone or in combination of two or more.
上述のように、アンモニウム塩水溶液で処理し、酸化亜鉛微粒子を塩基性炭酸亜鉛微粒子に変換することにより、より微細な粒子として担持することができる。 As described above, it can be supported as finer particles by treating with an aqueous ammonium salt solution and converting the zinc oxide fine particles into basic zinc carbonate fine particles.
酸化亜鉛微粒子または塩基性炭酸亜鉛微粒子を珪酸アルミニウム塩鉱物粒子の表面に析出させて担持させた後、一般には十分に水洗を行い、脱水・乾燥した後、粉砕する。 After zinc oxide fine particles or basic zinc carbonate fine particles are deposited and supported on the surface of aluminum silicate salt mineral particles, they are generally washed thoroughly, dehydrated and dried, and then pulverized.
亜鉛系架橋助剤は、有機酸、脂肪酸、脂肪酸金属塩、脂肪酸エステル、樹脂酸、樹脂酸金属塩、樹脂酸エステル、珪酸、珪酸塩(Na塩等)、及びシランカップリング剤より選ばれる少なくとも1種で表面処理されていてもよい。表面の全部または一部を覆う構造であればよく、必ずしも表面全体を連続的に覆う必要はない。 The zinc-based crosslinking aid is at least selected from organic acids, fatty acids, fatty acid metal salts, fatty acid esters, resin acids, resin acid metal salts, resin acid esters, silicic acid, silicates (Na salts, etc.), and silane coupling agents. One type of surface treatment may be performed. Any structure that covers all or part of the surface may be used, and it is not always necessary to continuously cover the entire surface.
表面処理方法としては、亜鉛系架橋助剤が水系スラリーである場合、表面処理剤をそのままの状態、あるいは適切な温度、溶媒で溶解して、湿式で処理することができる。また、亜鉛系架橋助剤が粉末状であれば、表面処理剤をそのままの状態、あるいは適切な温度、溶媒で溶解して乾式で処理することができる。 As the surface treatment method, when the zinc-based crosslinking aid is an aqueous slurry, the surface treatment agent can be treated in a wet state by dissolving the surface treatment agent as it is or in an appropriate temperature and solvent. Further, if the zinc-based crosslinking aid is in a powder form, the surface treatment agent can be processed in a dry state by dissolving the surface treatment agent as it is or with an appropriate temperature and solvent.
<ポリマー>
本発明において使用するポリマーは、有機過酸化物によって架橋させることができるものであれば、特に限定されるものではない。例えば、天然ゴム、合成ゴム、及びプラスチックから選ばれる少なくとも1種が選ばれる。
<Polymer>
The polymer used in the present invention is not particularly limited as long as it can be crosslinked by an organic peroxide. For example, at least one selected from natural rubber, synthetic rubber, and plastic is selected.
合成ゴムとしては、架橋可能なゴムが用いられる。合成ゴムの具体的な例としては、例えば、シス−1,4−ポリイソプレン、乳化重合スチレンブタジエン共重合体、溶液重合スチレンブタジエン共重合体、低シス−1,4−ポリブタジエン、高シス−1,4−ポリブタジエン、エチレン−プロピレン−ジエン共重合体、エチレン−ポリプレンゴム、シリコーンゴム(HTV、RTV、LIM)、アクリルゴム、変性アクリルゴム、フッ素ゴム、クロロプレン、ハロゲン化ブチルゴム、アクリロニトリル−ブタジエンゴム、水素化添加アクリロニトリル−ブタジエンゴム等が挙げられる。 As the synthetic rubber, a crosslinkable rubber is used. Specific examples of the synthetic rubber include, for example, cis-1,4-polyisoprene, emulsion polymerized styrene butadiene copolymer, solution polymerized styrene butadiene copolymer, low cis-1,4-polybutadiene, and high cis-1. , 4-polybutadiene, ethylene-propylene-diene copolymer, ethylene-polyprene rubber, silicone rubber (HTV, RTV, LIM), acrylic rubber, modified acrylic rubber, fluoro rubber, chloroprene, halogenated butyl rubber, acrylonitrile-butadiene rubber, hydrogen And acrylonitrile-butadiene rubber and the like.
上述したゴム成分の中でも、天然ゴム、エチレンプロピレンゴム、エチレン−プロピレン−ジエン共重合体、シリコーンゴム、低シス−1,4−ポリブタジエン、及び高シス−1,4−ポリブタジエンが、特に好適に用いられる。 Among the rubber components described above, natural rubber, ethylene propylene rubber, ethylene-propylene-diene copolymer, silicone rubber, low cis-1,4-polybutadiene, and high cis-1,4-polybutadiene are particularly preferably used. It is done.
ゴム成分は、上述した天然ゴム又は合成ゴムを1種用いてもよく、また2種以上混合して用いてもよい。混合比は、要求される特性などに応じて、適宜設定することができる。 As the rubber component, one kind of natural rubber or synthetic rubber described above may be used, or two or more kinds thereof may be mixed and used. The mixing ratio can be appropriately set according to required characteristics.
プラスチックスとしては、架橋可能なものであれば使用でき、ポリエチレン(PE)、エチレン酢酸ビニル共重合体(EVA)などが例示される。 Any plastic can be used as long as it is crosslinkable, and examples thereof include polyethylene (PE) and ethylene vinyl acetate copolymer (EVA).
また、熱可塑性エラストマーも使用可能で、熱可塑性エラストマーとしては、ポリスチレン系熱可塑性エラストマー、ポリプロピレン系熱可塑性エラストマー、ポリジエン系熱可塑性エラストマー、塩素系熱可塑性エラストマー、エンジニアリングプラスチックス系エラストマーなどを例示することができる。 Thermoplastic elastomers can also be used. Examples of thermoplastic elastomers include polystyrene-based thermoplastic elastomers, polypropylene-based thermoplastic elastomers, polydiene-based thermoplastic elastomers, chlorine-based thermoplastic elastomers, and engineering plastic-based elastomers. Can do.
<有機過酸化物>
有機過酸化物としては、例えば、ベンゾイルパーオキサイド、ジクミルパーオキサイド、ジ−t−ブチルパーオキサイド、t−ブチルクミルパーオキサイド、メチルエチルケトンパーオキサイド、クメンハイドロパーオキサイド、2,5−ジメチル−2,5−ジ(t−ブチルパーオキシ)ヘキサン、2,5−ジメチル−2,5−ジ(ベンゾイルパーオキシ)ヘキサン、2,5−ジメチル−2,5−ジ(t−ブチルパーオキシ)ヘキシン−3、あるいは1,3−ビス(t−ブチルパーオキシプロピル)ベンゼン、ジ−t−ブチルパーオキシ−ジイソプロピルベンゼン、t−ブチルパーオキシベンゼン、2,4−ジクロロベンゾイルパーオキサイド、1,1−ジ−t−ブチルパーオキシ−3,3,5−トリメチルシロキサン、n−ブチル−4,4−ジ−t−ブチルパーオキシバレレート等が挙げられる。
<Organic peroxide>
Examples of the organic peroxide include benzoyl peroxide, dicumyl peroxide, di-t-butyl peroxide, t-butyl cumyl peroxide, methyl ethyl ketone peroxide, cumene hydroperoxide, 2,5-dimethyl-2, 5-di (t-butylperoxy) hexane, 2,5-dimethyl-2,5-di (benzoylperoxy) hexane, 2,5-dimethyl-2,5-di (t-butylperoxy) hexyne- 3, or 1,3-bis (t-butylperoxypropyl) benzene, di-t-butylperoxy-diisopropylbenzene, t-butylperoxybenzene, 2,4-dichlorobenzoyl peroxide, 1,1-di -T-butylperoxy-3,3,5-trimethylsiloxane, n-butyl-4,4 Di -t- butyl peroxy valerate, and the like.
<その他の添加剤>
本発明においては、架橋助剤として、上記亜鉛系架橋助剤以外に、他の架橋助剤を併用してもよい。例えば、酸化亜鉛、活性亜鉛華、塩基性炭酸亜鉛、微粒子酸化亜鉛、酸化セリウム、多官能性アクリルモノマー(TAIC)、ビスマレイミドなどが挙げられる。
<Other additives>
In the present invention, as the crosslinking aid, in addition to the zinc-based crosslinking aid, other crosslinking aids may be used in combination. For example, zinc oxide, activated zinc white, basic zinc carbonate, fine particle zinc oxide, cerium oxide, polyfunctional acrylic monomer (TAIC), bismaleimide and the like can be mentioned.
また、必要に応じてさらに公知の添加剤を含有してもよい。このようなものとして、例えば、湿式シリカ、乾式シリカ、アルカリシリカ、高分散性シリカ(HDS)、クレー、タルク、水酸化アルミニウム、水酸化マグネシウム、長石、塩基性炭酸マグネシウム、カーボンブラックなどを適宜併用して用いることができる。更に、プロセスオイル、酸化防止剤、老化防止剤、活性剤、ステアリン酸、酸化亜鉛、ワックスなどの添加剤、硫黄、加硫促進剤などの加硫剤等も、所望に応じて配合することができる。 Moreover, you may contain a well-known additive as needed. As such, for example, wet silica, dry silica, alkali silica, highly dispersible silica (HDS), clay, talc, aluminum hydroxide, magnesium hydroxide, feldspar, basic magnesium carbonate, carbon black, etc. are used in combination as appropriate. Can be used. Furthermore, process oils, antioxidants, anti-aging agents, activators, additives such as stearic acid, zinc oxide, wax, and vulcanizing agents such as sulfur and vulcanization accelerators may be added as desired. it can.
<架橋ポリマー組成物>
本発明の架橋ポリマー組成物は、亜鉛系架橋助剤と、有機過酸化物をポリマーに配合し、有機過酸化物によって架橋させたものである。
<Crosslinked polymer composition>
The cross-linked polymer composition of the present invention is obtained by blending a zinc-based cross-linking aid and an organic peroxide into a polymer and cross-linking with the organic peroxide.
亜鉛系架橋助剤の配合量は、ポリマー100質量部に対し、亜鉛系架橋助剤が0.5〜10質量部の範囲であることが好ましく、さらに好ましくは1〜5質量部の範囲である。亜鉛系架橋助剤の配合量が少ないと、耐熱老化性等を十分に向上させることができない場合がある。また、亜鉛系架橋助剤が多すぎると、配合量に比例した効果を得ることができないとともに、ポリマーの機械的特性等が低下するおそれがある。 The compounding amount of the zinc-based crosslinking aid is preferably in the range of 0.5 to 10 parts by mass, more preferably in the range of 1 to 5 parts by mass with respect to 100 parts by mass of the polymer. . If the blending amount of the zinc-based crosslinking aid is small, the heat aging resistance may not be sufficiently improved. Moreover, when there are too many zinc type crosslinking adjuvants, while being unable to acquire the effect proportional to the compounding quantity, there exists a possibility that the mechanical characteristic etc. of a polymer may fall.
有機過酸化物の配合量は、ポリマー100質量部に対し、0.5〜10質量部の範囲であることが好ましく、さらに好ましくは0.75〜5質量部の範囲である。有機過酸化物の量が少ないと、ポリマー組成物において十分な架橋構造を形成できない場合がある。また、有機過酸化物の配合量が多すぎると、ポリマーの機械的特性等が低下するおそれがある。 The compounding amount of the organic peroxide is preferably in the range of 0.5 to 10 parts by mass, more preferably in the range of 0.75 to 5 parts by mass with respect to 100 parts by mass of the polymer. If the amount of the organic peroxide is small, a sufficient crosslinked structure may not be formed in the polymer composition. Moreover, when there are too many compounding quantities of an organic peroxide, there exists a possibility that the mechanical characteristic etc. of a polymer may fall.
有機過酸化物に対する亜鉛系架橋助剤の割合は、有機過酸化物100質量部に対し、5〜2000質量部の範囲であることが好ましく、さらには20〜1333質量部の範囲であることが好ましい。有機過酸化物に対する亜鉛系架橋助剤の配合量が少なすぎると、耐熱老化性等を十分に向上させることができない場合がある。また、有機過酸化物に対する亜鉛系架橋助剤の割合が多すぎると、配合量に比例して耐熱老化性等を向上することができるという本発明の効果を十分に得ることができない場合があり、また機械的特性等が低下するおそれがある。 The ratio of the zinc-based crosslinking aid to the organic peroxide is preferably in the range of 5 to 2000 parts by mass and more preferably in the range of 20 to 1333 parts by mass with respect to 100 parts by mass of the organic peroxide. preferable. If the blending amount of the zinc-based crosslinking aid with respect to the organic peroxide is too small, the heat aging resistance and the like may not be sufficiently improved. Further, if the ratio of the zinc-based crosslinking aid to the organic peroxide is too large, the effect of the present invention that the heat aging resistance and the like can be improved in proportion to the blending amount may not be sufficiently obtained. In addition, the mechanical characteristics and the like may be deteriorated.
ポリマーに亜鉛系架橋助剤及び有機過酸化物を配合した後、有機過酸化物によってポリマーを架橋するため、ポリマー組成物を加熱する。加熱温度は、使用する有機過酸化物等により適宜調整されるが、一般には、120〜200℃の範囲であることが好ましく、さらに好ましくは150〜180℃の範囲である。また、加熱時間は、各温度におけるキュラストメーターで測定したtc(90)を参考にして決定する。 After blending the polymer with a zinc-based crosslinking aid and an organic peroxide, the polymer composition is heated in order to crosslink the polymer with the organic peroxide. Although heating temperature is suitably adjusted with the organic peroxide etc. to be used, generally it is preferable that it is the range of 120-200 degreeC, More preferably, it is the range of 150-180 degreeC. The heating time is determined with reference to tc (90) measured with a curast meter at each temperature.
ポリマーに亜鉛系架橋助剤及び有機過酸化物を配合する方法は、特に限定されるものではなく、従来公知の混練装置、具体的には、バンバリーミキサー(登録商標)、インターミックス(登録商標)、ニーダー、ロール等により行うことができる。 The method for blending the polymer with the zinc-based crosslinking aid and the organic peroxide is not particularly limited, and conventionally known kneading apparatuses, specifically, Banbury mixer (registered trademark), intermix (registered trademark). , Kneader, roll or the like.
以下、本発明を具体的な実施例により説明するが、本発明は以下の実施例に限定されるものではない。 Hereinafter, the present invention will be described with reference to specific examples, but the present invention is not limited to the following examples.
(合成例1)
5.5質量%濃度の焼成クレー水懸濁液847mlに、酸化亜鉛を91.5g加えて十分に攪拌した。ついで、10質量%濃度の炭酸ナトリウム水溶液を330gと、10質量%塩化亜鉛水溶液を340g加えてさらに攪拌した。これに30質量%濃度の炭酸ガスを、pHが7以下になるまで吹き込んで、焼成クレーの表面に塩基性炭酸亜鉛を析出させて亜鉛系架橋助剤を合成した。その後、脱水、乾燥、粉砕工程を経て粉末化し、架橋助剤Aを得た。
(Synthesis Example 1)
91.5 g of zinc oxide was added to 847 ml of a baked clay water suspension having a concentration of 5.5% by mass and sufficiently stirred. Subsequently, 330 g of a 10% by mass sodium carbonate aqueous solution and 340 g of a 10% by mass zinc chloride aqueous solution were added and further stirred. Carbon dioxide gas with a concentration of 30% by mass was blown into this until the pH became 7 or less, and basic zinc carbonate was precipitated on the surface of the baked clay to synthesize a zinc-based crosslinking aid. Thereafter, the mixture was pulverized through dehydration, drying, and pulverization steps to obtain a crosslinking aid A.
架橋助剤AのBET比表面積は50m2/gであった。また、架橋助剤Aにおいては、焼成クレーに塩基性炭酸亜鉛が金属亜鉛として45質量%担持されていた。従って、担持された塩基性炭酸亜鉛のBET比表面積は60m2/gであった。 The BET specific surface area of the crosslinking aid A was 50 m 2 / g. In the crosslinking aid A, 45% by mass of basic zinc carbonate as metal zinc was supported on the calcined clay. Therefore, the supported basic zinc carbonate had a BET specific surface area of 60 m 2 / g.
(合成例2)
7.3質量%濃度の焼成クレー水懸濁液847mlに、酸化亜鉛を25.5g加えて十分に攪拌した。ついで、10質量%濃度の炭酸ナトリウム水溶液を330gと、10質量%塩化亜鉛水溶液を340g加えてさらに攪拌した。これに30質量%濃度の炭酸ガスを、pHが7以下になるまで吹き込んで、焼成クレーの表面に塩基性炭酸亜鉛を析出させて亜鉛系架橋助剤を合成した。その後、脱水、乾燥、粉砕工程を経て粉末化し、架橋助剤Bを得た。
(Synthesis Example 2)
To 847 ml of the baked clay water suspension having a concentration of 7.3% by mass, 25.5 g of zinc oxide was added and sufficiently stirred. Subsequently, 330 g of a 10% by mass sodium carbonate aqueous solution and 340 g of a 10% by mass zinc chloride aqueous solution were added and further stirred. Carbon dioxide gas with a concentration of 30% by mass was blown into this until the pH became 7 or less, and basic zinc carbonate was precipitated on the surface of the baked clay to synthesize a zinc-based crosslinking aid. Thereafter, the mixture was pulverized through dehydration, drying, and pulverization steps to obtain a crosslinking aid B.
架橋助剤BのBET比表面積は38m2/gであった。また、架橋助剤Bにおいては、焼成クレーに塩基性炭酸亜鉛が金属亜鉛として30質量%担持されていた。従って、担持された塩基性炭酸亜鉛のBET比表面積は59m2/gであった。 The BET specific surface area of the crosslinking aid B was 38 m 2 / g. In the crosslinking aid B, 30% by mass of basic zinc carbonate as metal zinc was supported on the calcined clay. Therefore, the supported basic zinc carbonate had a BET specific surface area of 59 m 2 / g.
〔EPDMへの配合〕
(実施例1〜4及び比較例1〜5)
EPDM100質量部に、ステアリン酸1質量部、カーボンブラック(FEF)50質量部、プロセスオイル10質量部、架橋剤としてのDCP(ジクミルパーオキサイド)2.7質量部、架橋助剤A、B、C、D、またはEを、表1に示す添加量となるように配合し、ポリマー組成物を作製した。
[Formulation in EPDM]
(Examples 1-4 and Comparative Examples 1-5)
To 100 parts by weight of EPDM, 1 part by weight of stearic acid, 50 parts by weight of carbon black (FEF), 10 parts by weight of process oil, 2.7 parts by weight of DCP (dicumyl peroxide) as a crosslinking agent, crosslinking aids A and B, C, D, or E was blended so as to have the addition amount shown in Table 1 to prepare a polymer composition.
なお、EPDM、ステアリン酸、プロセスオイル、及びDCPとしては以下のものを用いた。 In addition, the following were used as EPDM, stearic acid, process oil, and DCP.
・EPDM:エチレンプロピレンジエンゴム(エチレン含有量61%)、JSR社製、EP21
・ステアリン酸:ルナックS−50、花王社製
・プロセスオイル:PW−380、出光興産社製
・DCP:パークミルD、日油社製
EPDM: ethylene propylene diene rubber (ethylene content 61%), manufactured by JSR, EP21
・ Stearic acid: LUNAC S-50, manufactured by Kao Corporation ・ Process oil: PW-380, manufactured by Idemitsu Kosan Co., Ltd. ・ DCP: Park Mill D, manufactured by NOF Corporation
架橋助剤A〜Fは以下の通りである。 The crosslinking aids A to F are as follows.
架橋助剤A:合成例1で調製した亜鉛系架橋助剤
架橋助剤B:合成例2で調製した亜鉛系架橋助剤
架橋助剤C:酸化亜鉛(酸化亜鉛2種、正同化学社製)
架橋助剤D:活性亜鉛華(活性亜鉛華AZO、正同化学社製)
架橋助剤E:微粒子酸化亜鉛(井上石灰社製、メタZ102)
架橋助剤F:架橋助剤A100質量部にビニルトリメトキシシランを乾式で0.5質量部表面処理したもの。
Crosslinking aid A: Zinc-based crosslinking aid prepared in Synthesis Example 1 Crosslinking aid B: Zinc-based crosslinking aid prepared in Synthesis Example 2 Crosslinking aid C: Zinc oxide (2 types of zinc oxide, manufactured by Shodo Chemical Co., Ltd.) )
Crosslinking aid D: activated zinc white (active zinc white AZO, manufactured by Shodo Chemical Co., Ltd.)
Crosslinking aid E: Fine particle zinc oxide (Inoue Lime, Meta Z102)
Crosslinking aid F: Crosslinking aid A 100 parts by mass of vinyl trimethoxysilane surface-treated by 0.5 parts by mass.
本実施例及び本比較例、並びに以下の実施例及び比較例においては、8インチロールを用いてポリマー及び添加剤を混練し配合した。 In this example and this comparative example, and in the following examples and comparative examples, the polymer and additive were kneaded and blended using an 8-inch roll.
得られたポリマー組成物について、キュラストメーターを用いて、最適加硫時間tc(90)を求め、得られたデータを基に、所定時間加熱し、架橋させて、厚さ2mmの試験シートを作製した。 About the obtained polymer composition, the optimal vulcanization time tc (90) was calculated | required using the curast meter, based on the obtained data, it heated for a predetermined time, was made to bridge | crosslink, and the test sheet of thickness 2mm was obtained. Produced.
EPDMについては、160℃×30分間の加熱を行った。 EPDM was heated at 160 ° C. for 30 minutes.
〔耐熱老化性の評価〕
得られたゴムシートについて、以下の方法で、耐熱老化性を評価した。具体的には、試験前後の引張強さ及び伸びの変化率を求めた。
[Evaluation of heat aging resistance]
About the obtained rubber sheet, the heat aging resistance was evaluated by the following method. Specifically, the tensile strength and elongation change rate before and after the test were obtained.
引張強さ及び伸びについては、JIS K 6251に規定された方法に従って、ショッパー抗張力試験機を用い、23℃における引っ張り強さ及び伸びを測定した。加熱条件は、150℃×72時間とし、加熱試験前及び加熱試験後のそれぞれの引張強さ及び伸びの測定を行い、以下のようにして、TB変化率及びEB変化率を求めた。 For tensile strength and elongation, tensile strength and elongation at 23 ° C. were measured using a shopper tensile tester according to the method defined in JIS K 6251. The heating conditions were 150 ° C. × 72 hours, the tensile strength and elongation before and after the heating test were measured, and the TB change rate and EB change rate were determined as follows.
TB変化率(%)=〔(加熱試験後の引張強さ)−(加熱試験前の引張強さ)/(加熱試験前の引張強さ)〕×100 TB change rate (%) = [(tensile strength after heating test) − (tensile strength before heating test) / (tensile strength before heating test)] × 100
EB変化率(%)=〔(加熱試験後の伸び)−(加熱試験前の伸び)/(加熱試験前の伸び)〕×100 EB change rate (%) = [(Elongation after heating test) − (Elongation before heating test) / (Elongation before heating test)] × 100
〔導電率の評価〕
実施例1〜3及び比較例1〜5について、厚さ2mmで直径6cmのゴムシートを作製し、このゴムシートを200mlのイオン交換水に80℃で30日間浸漬させた。浸漬させた後のイオン交換水の導電率を測定し、表1に示した。
[Evaluation of conductivity]
For Examples 1 to 3 and Comparative Examples 1 to 5, rubber sheets having a thickness of 2 mm and a diameter of 6 cm were prepared, and the rubber sheets were immersed in 200 ml of ion exchange water at 80 ° C. for 30 days. The conductivity of ion-exchanged water after the immersion was measured and shown in Table 1.
表1に示すように、本発明に従う実施例1〜4の架橋ポリマー組成物は、比較例1〜5の架橋ポリマー組成物に比べ、TB変化率及びEB変化率が小さくなっている。従って、耐熱老化性が大幅に改善されている。 As shown in Table 1, the crosslinked polymer compositions of Examples 1 to 4 according to the present invention have a smaller TB change rate and EB change rate than the crosslinked polymer compositions of Comparative Examples 1 to 5. Therefore, the heat aging resistance is greatly improved.
本発明に従い、亜鉛系架橋助剤を用いることにより、架橋密度を高めることができるため、耐熱老化性を向上させることができたものと考えられる。本発明の架橋ポリマーはシール材(例えばOリング、Dリング、Xリング、ガスケット)、パッキング、電線、ゴム板、ゴムシート、防振ゴム、ベルト(伝動ベルトなど)、ホース(ラジエーターホースなど)、スポンジ、などに好適に用いることができる。 According to the present invention, it is considered that the heat aging resistance can be improved because the crosslink density can be increased by using a zinc-based crosslinking aid. The crosslinked polymer of the present invention includes a sealing material (for example, O-ring, D-ring, X-ring, gasket), packing, electric wire, rubber plate, rubber sheet, anti-vibration rubber, belt (power transmission belt, etc.), hose (radiator hose, etc.), It can be suitably used for sponges and the like.
また、本発明に従う実施例1〜3の架橋ポリマー組成物は、比較例2〜5の架橋ポリマー組成物に比べ、導電率が小さくなっている。これは、本発明に従い架橋助剤として、本発明の亜鉛系架橋助剤を用いることにより、Znの溶出量が低減できたためであると思われる。従って、本発明の架橋ポリマー組成物は、例えば、燃料電池用パッキングなどに好適に用いることができる。 In addition, the cross-linked polymer compositions of Examples 1 to 3 according to the present invention have a lower electrical conductivity than the cross-linked polymer compositions of Comparative Examples 2 to 5. This seems to be because the elution amount of Zn could be reduced by using the zinc-based crosslinking aid of the present invention as the crosslinking aid according to the present invention. Therefore, the crosslinked polymer composition of the present invention can be suitably used, for example, for packing for fuel cells.
〔NRゴムへの配合〕
(実施例5及び比較例6〜9)
ポリマーとして、NRゴム(天然ゴム)を用い、架橋ポリマー組成物を調製した。
[Combination with NR rubber]
(Example 5 and Comparative Examples 6-9)
As the polymer, NR rubber (natural rubber) was used to prepare a crosslinked polymer composition.
NR100質量部に対し、ステアリン酸1質量部、カーボンブラック(FEF)50質量部を配合し、さらに架橋剤、架橋助剤及び加硫促進剤を表2に示すように配合した。 With respect to 100 parts by mass of NR, 1 part by mass of stearic acid and 50 parts by mass of carbon black (FEF) were blended, and a crosslinking agent, a crosslinking aid and a vulcanization accelerator were blended as shown in Table 2.
比較例8及び9においては、架橋剤として、有機過酸化物に代えて、硫黄を用いている。 In Comparative Examples 8 and 9, sulfur is used as the crosslinking agent instead of the organic peroxide.
NRゴム及び加硫促進剤D及び加硫促進剤DMとしては、以下のものを用いた。 The following were used as NR rubber, vulcanization accelerator D, and vulcanization accelerator DM.
・NRゴム:天然ゴム、SML♯3
・加硫促進剤D:商品名ノクセラーD、大内新興化学工業社製
・加硫促進剤DM:商品名ノクセラーDM、大内新興化学工業社製
NR rubber: natural rubber, SML # 3
・ Vulcanization accelerator D: Product name Noxeller D, manufactured by Ouchi Shinsei Chemical Co., Ltd. ・ Vulcanization accelerator DM: Product name Noxeller DM, manufactured by Ouchi Shinsei Chemical Industry Co., Ltd.
上記実施例1と同様に、8インチロールを用いて混練した後、架橋させた。DCPによる架橋における加熱条件は、架橋助剤を配合していない比較例6において160℃×60分間とし、実施例5及び比較例7においては、160℃×30分間とした。 In the same manner as in Example 1, the mixture was kneaded using an 8-inch roll and then crosslinked. The heating conditions for crosslinking by DCP were 160 ° C. × 60 minutes in Comparative Example 6 in which no crosslinking assistant was blended, and 160 ° C. × 30 minutes in Example 5 and Comparative Example 7.
また、硫黄を用いた架橋の場合には、150℃×10分間の加熱とした。 In the case of crosslinking using sulfur, heating was performed at 150 ° C. × 10 minutes.
〔耐熱老化性の評価〕
加熱試験における加熱条件を、120℃×72時間とする以外は、上記と同様にして、TB変化率及びEB変化率を測定し、結果を表2に示した。
[Evaluation of heat aging resistance]
The TB change rate and the EB change rate were measured in the same manner as described above except that the heating conditions in the heating test were 120 ° C. × 72 hours, and the results are shown in Table 2.
表2に示すように、本発明に従う実施例5は、比較例6、7に比べ、TB変化率が小さくなっており、耐熱老化性が大幅に改善されていることがわかる。 As shown in Table 2, Example 5 according to the present invention has a smaller TB change rate than Comparative Examples 6 and 7, and it can be seen that the heat aging resistance is greatly improved.
比較例8及び比較例9においては、硫黄による架橋を行っており、比較例9は、本発明の亜鉛系架橋助剤を用い、比較例8は、従来の架橋助剤である酸化亜鉛を用いている。比較例8と比較例9の比較から明らかなように、硫黄による架橋では、本発明の効果が得られないことがわかる。本発明の架橋ポリマーはシール材(例えばOリング、Dリング、Xリング、ガスケット)、パッキング、電線、ゴム板、ゴムシート、防振ゴム、ベルト(伝動ベルトなど)、ホース(エアーホース、ガスホースなど)、スポンジ、などに好適に用いることができる。 In Comparative Example 8 and Comparative Example 9, crosslinking with sulfur is performed, Comparative Example 9 uses the zinc-based crosslinking aid of the present invention, and Comparative Example 8 uses zinc oxide, which is a conventional crosslinking aid. ing. As is clear from the comparison between Comparative Example 8 and Comparative Example 9, it can be seen that the effect of the present invention cannot be obtained by crosslinking with sulfur. The crosslinked polymer of the present invention is a sealing material (for example, O-ring, D-ring, X-ring, gasket), packing, electric wire, rubber plate, rubber sheet, anti-vibration rubber, belt (power transmission belt, etc.), hose (air hose, gas hose, etc.) ), Sponge, and the like.
〔NBRゴムへの配合〕
(実施例6及び比較例10〜11)
ここでは、NBRゴムに配合した。NBR100質量部に対し、ステアリン酸1質量部、カーボンブラック(FEF)50質量部、ノクラックCD1質量部、ノクラックMBZ1質量部、可塑剤(TOTM)5質量部、DCP3.2質量部を配合し、さらに架橋助剤を表3に示すように配合して架橋ポリマー組成物を調製した。
[Combination with NBR rubber]
(Example 6 and Comparative Examples 10-11)
Here, it mix | blended with the NBR rubber | gum. To 100 parts by weight of NBR, 1 part by weight of stearic acid, 50 parts by weight of carbon black (FEF), 1 part by weight of Nocrak CD, 1 part by weight of Nocrack MBZ, 5 parts by weight of plasticizer (TOTM), 3.2 parts by weight of DCP, A crosslinking aid was blended as shown in Table 3 to prepare a crosslinked polymer composition.
NBRゴム、ノクラックCD、ノクラックMBZ、及び可塑剤は以下の通りである。 The NBR rubber, no crack CD, no crack MBZ, and plasticizer are as follows.
・NBRゴム:中高ニトリルゴム(アクリルニトリル含有量31%以上36%未満)、日本ゼオン社製、Nipol 1042
・老化防止剤CD:商品名ノクラックCD、大内新興化学工業製
・老化防止剤MBZ:商品名ノクラックMBZ、大内新興化学工業製
・可塑剤TOTM:商品名トリメリックスT−08、花王製
NBR rubber: Medium-high nitrile rubber (acrylonitrile content of 31% or more and less than 36%), manufactured by Nippon Zeon Co., Ltd., Nipol 1042
・ Anti-aging agent CD: Trade name NOCRACK CD, manufactured by Ouchi Shinsei Chemical Industries ・ Aging inhibitor MBZ: Trade name NOCRACK MBZ, manufactured by Ouchi Shinsei Chemical Industries ・ Plasticizer TOTM: Trade name Trimerix T-08, manufactured by Kao
混練は、上記と同様に8インチロールを用いて行い、架橋のための加熱条件は160℃×20分間とした。 Kneading was performed using an 8-inch roll in the same manner as described above, and the heating conditions for crosslinking were 160 ° C. × 20 minutes.
〔耐熱老化性の評価〕
上記(EPDM配合)と同様にして、TB変化率及びEB変化率を測定し、表3に示した。
[Evaluation of heat aging resistance]
The TB change rate and EB change rate were measured in the same manner as in the above (EPDM blend), and are shown in Table 3.
表3に示すように、NBRゴムに配合した場合にも、本発明の亜鉛系架橋助剤を用いた実施例6は、比較例10及び比較例11に比べ、耐熱老化性が著しく向上している。本発明の架橋ポリマーは耐油性を要求される用途で利用でき、シール材(例えばOリング、Dリング、Xリング、ガスケット)、パッキング、電線、ゴム板、ゴムシート、防振ゴム、ベルト(伝動ベルトなど)、ホース(燃料ホースなど)、スポンジ、などに好適に用いることができる。 As shown in Table 3, even when blended with NBR rubber, Example 6 using the zinc-based crosslinking aid of the present invention has significantly improved heat aging resistance as compared with Comparative Example 10 and Comparative Example 11. Yes. The crosslinked polymer of the present invention can be used in applications that require oil resistance, such as sealing materials (for example, O-rings, D-rings, X-rings, gaskets), packing, electric wires, rubber plates, rubber sheets, anti-vibration rubbers, belts (power transmission) Belts, etc.), hoses (fuel hoses etc.), sponges, etc.
〔シリコーンゴムへの配合〕
(実施例7〜10及び比較例12〜15)
シリコーンゴム100質量部に対し、RC−4(5OP)0.75質量部を配合し、さらに架橋助剤を、表4に示すように配合した。
[Formulation in silicone rubber]
(Examples 7 to 10 and Comparative Examples 12 to 15)
RC-4 (5OP) 0.75 mass part was mix | blended with respect to 100 mass parts of silicone rubbers, and also the crosslinking adjuvant was mix | blended as shown in Table 4.
シリコーンゴム及びRC−4(5OP)は、以下の通りである。 Silicone rubber and RC-4 (5OP) are as follows.
・シリコーンゴム:商品名SH831U、ミラブル型シリコーンゴム、東レ・ダウコーニング社製
・架橋剤:商品名RC−4(5OP)、東レ・ダウコーニング社製
・ Silicone rubber: Trade name SH831U, Millable silicone rubber, manufactured by Toray Dow Corning ・ Crosslinking agent: Trade name RC-4 (5OP), manufactured by Toray Dow Corning
8インチロールを用いて混練し、混練後、1次架橋の加熱条件を170℃×15分間、2次架橋の加熱条件を200℃×4時間として、架橋させた。 Kneading was performed using an 8-inch roll, and after the kneading, crosslinking was performed by setting the heating conditions for primary crosslinking to 170 ° C. for 15 minutes and the heating conditions for secondary crosslinking to 200 ° C. for 4 hours.
シリコーンゴムでは、耐熱老化試験において架橋密度による違いが現れにくいので、加熱条件下での圧縮永久ひずみを測定した。 For silicone rubber, the difference in crosslink density hardly appears in the heat aging test, so the compression set under heating conditions was measured.
〔圧縮永久ひずみの評価〕
JIS K 6262に規定された方法に従って、圧縮装置を用いて試験した。圧縮割合は25%とし、試験温度(恒温槽温度)を150℃、試験時間を72時間とした。150℃の恒温槽に72時間入れたのち、試験片を取り出して室温で30分間静置した後、圧縮永久ひずみを測定した。
[Evaluation of compression set]
According to the method specified in JIS K 6262, it was tested using a compression apparatus. The compression ratio was 25%, the test temperature (constant temperature) was 150 ° C., and the test time was 72 hours. After putting in a thermostat of 150 ° C. for 72 hours, the test piece was taken out and allowed to stand at room temperature for 30 minutes, and then the compression set was measured.
測定結果を表4に示す。 Table 4 shows the measurement results.
表4に示す結果から明らかなように、本発明に従い亜鉛系架橋助剤を用いた実施例7〜10は、比較例12〜15に比べ、圧縮永久ひずみが小さくなっている。従って、耐熱老化性が著しく向上していることがわかる。さらに実施例10は、ビニルトリメトキシシランを表面処理することでロール加工性が向上した。 As is clear from the results shown in Table 4, Examples 7 to 10 using the zinc-based crosslinking aid according to the present invention have a smaller compression set than Comparative Examples 12 to 15. Therefore, it can be seen that the heat aging resistance is remarkably improved. Further, in Example 10, roll processability was improved by subjecting vinyltrimethoxysilane to a surface treatment.
本発明の架橋ポリマーは、E&E、OA機器、重電、電線の分野では、パッキング、ガスケット、テープ、チューブ、シート類、ヒーター発熱体エレメント、デフロスターワイヤー、TV部品、センサー類、コネクタ、キーボードスイッチ、ロール、発熱シート、ケーブル、アノードキャップ、デフロスター、ホットエアブラシ、ターンベルト、O−リング、バルブ、ハーネス末端絶縁、ジャーポット用パッキング、自動車、輸送分野では、ダイヤフラム、ローリング、プラグブーツ、防水コネクタ、ラジエーターホース、ターボチャージホース、インタークーラーホース、オイルシール、イグニッションフード、パッキング、ガケット、熱収縮チューブ、ジョイントホース、ケーブルジョイントコネクタ、プラグカバー、端子板、高電圧成形品、EGRホース、リアフランジシャフト用オイルシール、産業機械分野では、ホース類、ロール類、防振ゴム、バルブ、パッキング、チューブ、治具、耐熱メカ部品、医療・食品分野では、パッキング、ルミカー、乳首、各種カテーテル、輸血用チューブ、シャント、保存容器、人工心肺、人工皮膚、ガスケット、栓、O−リング、搾乳機チューブ、家庭用調理器具の口栓、食品製造機器部品、コンベアベルト、ピペッタースポット、その他分野では、水中メガネ、シュノーケル、マウスピース、ゴーグルバンド、建築用ガスケットなどで好適に用いられる。 In the fields of E & E, OA equipment, heavy electricity, and electric wires, the crosslinked polymer of the present invention is packing, gasket, tape, tube, sheets, heater heating element, defroster wire, TV parts, sensors, connectors, keyboard switches, Rolls, heat generating sheets, cables, anode caps, defrosters, hot air brushes, turn belts, O-rings, valves, harness end insulation, packing for jar pots, automobiles, in the transportation field, diaphragms, rolling, plug boots, waterproof connectors, radiators Hose, turbocharge hose, intercooler hose, oil seal, ignition hood, packing, gacket, heat shrink tube, joint hose, cable joint connector, plug cover, terminal plate, high voltage generator Products, EGR hoses, oil seals for rear flange shafts, in the industrial machinery field, hoses, rolls, anti-vibration rubber, valves, packing, tubes, jigs, heat-resistant mechanical parts, in the medical / food field, packing, lumicar, Nipples, various catheters, tubes for blood transfusion, shunts, storage containers, cardiopulmonary, artificial skin, gaskets, stoppers, O-rings, milking machine tubes, plugs for household cooking utensils, food production equipment parts, conveyor belts, pipettor spots In other fields, it is suitably used in underwater glasses, snorkels, mouthpieces, goggles bands, architectural gaskets and the like.
また、耐水蒸気性の向上も期待できることから、食品パッキング(ジャー、炊飯器、ポット)、ガスケット、O−リングに用いられるシール材、パッキングに好適に用いることが期待できる。 Moreover, since improvement in water vapor resistance can also be expected, it can be suitably used for food packing (jars, rice cookers, pots), gaskets, sealing materials used for O-rings, and packing.
Claims (6)
ポリマーに亜鉛系架橋助剤及び有機過酸化物を配合する工程と、
亜鉛系架橋助剤及び有機過酸化物を配合したポリマーを加熱して、有機過酸化物によってポリマーを架橋する工程とを備えることを特徴とする架橋ポリマー組成物の製造方法。 A method for producing the crosslinked polymer composition according to any one of claims 1 to 5,
Blending a polymer with a zinc-based crosslinking aid and an organic peroxide;
And heating the polymer containing the zinc-based crosslinking aid and the organic peroxide to crosslink the polymer with the organic peroxide.
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R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |