WO2023032408A1 - 樹脂組成物および成形品 - Google Patents
樹脂組成物および成形品 Download PDFInfo
- Publication number
- WO2023032408A1 WO2023032408A1 PCT/JP2022/023901 JP2022023901W WO2023032408A1 WO 2023032408 A1 WO2023032408 A1 WO 2023032408A1 JP 2022023901 W JP2022023901 W JP 2022023901W WO 2023032408 A1 WO2023032408 A1 WO 2023032408A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resin composition
- xylylenediamine
- polyamide resin
- dicarboxylic acid
- molded article
- Prior art date
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- 239000011342 resin composition Substances 0.000 title claims abstract description 76
- 229920006122 polyamide resin Polymers 0.000 claims abstract description 76
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims abstract description 38
- GKXVJHDEWHKBFH-UHFFFAOYSA-N [2-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=CC=C1CN GKXVJHDEWHKBFH-UHFFFAOYSA-N 0.000 claims abstract description 35
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical compound C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 claims abstract description 34
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims abstract description 34
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims abstract description 24
- 150000004985 diamines Chemical group 0.000 claims abstract description 19
- 125000001931 aliphatic group Chemical group 0.000 claims abstract description 16
- 238000002835 absorbance Methods 0.000 claims abstract description 12
- 125000004432 carbon atom Chemical group C* 0.000 claims description 31
- TVIDDXQYHWJXFK-UHFFFAOYSA-N dodecanedioic acid Chemical compound OC(=O)CCCCCCCCCCC(O)=O TVIDDXQYHWJXFK-UHFFFAOYSA-N 0.000 claims description 13
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 claims description 12
- 125000000217 alkyl group Chemical group 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 8
- 239000000835 fiber Substances 0.000 claims description 5
- 125000003545 alkoxy group Chemical group 0.000 claims description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 4
- 239000000470 constituent Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 21
- 239000000047 product Substances 0.000 description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- FDLQZKYLHJJBHD-UHFFFAOYSA-N [3-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=CC(CN)=C1 FDLQZKYLHJJBHD-UHFFFAOYSA-N 0.000 description 14
- 239000006096 absorbing agent Substances 0.000 description 14
- -1 aliphatic dicarboxylic acids Chemical class 0.000 description 14
- 229920005989 resin Polymers 0.000 description 14
- 239000011347 resin Substances 0.000 description 14
- 238000006243 chemical reaction Methods 0.000 description 13
- 238000000465 moulding Methods 0.000 description 11
- 229920002647 polyamide Polymers 0.000 description 11
- ISKQADXMHQSTHK-UHFFFAOYSA-N [4-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=C(CN)C=C1 ISKQADXMHQSTHK-UHFFFAOYSA-N 0.000 description 9
- 238000004132 cross linking Methods 0.000 description 9
- 230000014759 maintenance of location Effects 0.000 description 9
- 238000005259 measurement Methods 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- 239000004952 Polyamide Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 238000012360 testing method Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000000704 physical effect Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 229910052724 xenon Inorganic materials 0.000 description 5
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 5
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 4
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 4
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 229920005992 thermoplastic resin Polymers 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229920002292 Nylon 6 Polymers 0.000 description 3
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- 239000002253 acid Substances 0.000 description 3
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- 238000000071 blow moulding Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
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- 238000012545 processing Methods 0.000 description 3
- BYEAHWXPCBROCE-UHFFFAOYSA-N 1,1,1,3,3,3-hexafluoropropan-2-ol Chemical compound FC(F)(F)C(O)C(F)(F)F BYEAHWXPCBROCE-UHFFFAOYSA-N 0.000 description 2
- QFGCFKJIPBRJGM-UHFFFAOYSA-N 12-[(2-methylpropan-2-yl)oxy]-12-oxododecanoic acid Chemical compound CC(C)(C)OC(=O)CCCCCCCCCCC(O)=O QFGCFKJIPBRJGM-UHFFFAOYSA-N 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- IPRJXAGUEGOFGG-UHFFFAOYSA-N N-butylbenzenesulfonamide Chemical compound CCCCNS(=O)(=O)C1=CC=CC=C1 IPRJXAGUEGOFGG-UHFFFAOYSA-N 0.000 description 2
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 2
- 239000001361 adipic acid Substances 0.000 description 2
- 235000011037 adipic acid Nutrition 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- VHRGRCVQAFMJIZ-UHFFFAOYSA-N cadaverine Chemical compound NCCCCCN VHRGRCVQAFMJIZ-UHFFFAOYSA-N 0.000 description 2
- 238000012668 chain scission Methods 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- NNBZCPXTIHJBJL-UHFFFAOYSA-N decalin Chemical compound C1CCCC2CCCCC21 NNBZCPXTIHJBJL-UHFFFAOYSA-N 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 2
- 239000012770 industrial material Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 229920006111 poly(hexamethylene terephthalamide) Polymers 0.000 description 2
- 230000000379 polymerizing effect Effects 0.000 description 2
- KIDHWZJUCRJVML-UHFFFAOYSA-N putrescine Chemical compound NCCCCN KIDHWZJUCRJVML-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229920006012 semi-aromatic polyamide Polymers 0.000 description 2
- 239000001632 sodium acetate Substances 0.000 description 2
- 235000017281 sodium acetate Nutrition 0.000 description 2
- 239000012321 sodium triacetoxyborohydride Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- TYFQFVWCELRYAO-UHFFFAOYSA-N suberic acid Chemical compound OC(=O)CCCCCCC(O)=O TYFQFVWCELRYAO-UHFFFAOYSA-N 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 239000012463 white pigment Substances 0.000 description 2
- KJYSXRBJOSZLEL-UHFFFAOYSA-N (2,4-ditert-butylphenyl) 3,5-ditert-butyl-4-hydroxybenzoate Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OC(=O)C1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 KJYSXRBJOSZLEL-UHFFFAOYSA-N 0.000 description 1
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical group NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 description 1
- PWGJDPKCLMLPJW-UHFFFAOYSA-N 1,8-diaminooctane Chemical compound NCCCCCCCCN PWGJDPKCLMLPJW-UHFFFAOYSA-N 0.000 description 1
- JCUZDQXWVYNXHD-UHFFFAOYSA-N 2,2,4-trimethylhexane-1,6-diamine Chemical compound NCCC(C)CC(C)(C)CN JCUZDQXWVYNXHD-UHFFFAOYSA-N 0.000 description 1
- DPQHRXRAZHNGRU-UHFFFAOYSA-N 2,4,4-trimethylhexane-1,6-diamine Chemical compound NCC(C)CC(C)(C)CCN DPQHRXRAZHNGRU-UHFFFAOYSA-N 0.000 description 1
- HASUJDLTAYUWCO-UHFFFAOYSA-N 2-aminoundecanoic acid Chemical compound CCCCCCCCCC(N)C(O)=O HASUJDLTAYUWCO-UHFFFAOYSA-N 0.000 description 1
- JZUHIOJYCPIVLQ-UHFFFAOYSA-N 2-methylpentane-1,5-diamine Chemical compound NCC(C)CCCN JZUHIOJYCPIVLQ-UHFFFAOYSA-N 0.000 description 1
- WTKWFNIIIXNTDO-UHFFFAOYSA-N 3-isocyanato-5-methyl-2-(trifluoromethyl)furan Chemical compound CC1=CC(N=C=O)=C(C(F)(F)F)O1 WTKWFNIIIXNTDO-UHFFFAOYSA-N 0.000 description 1
- GGUFVZFOCZNPEG-UHFFFAOYSA-N 4,5,6-triphenyltriazine Chemical group C1=CC=CC=C1C1=NN=NC(C=2C=CC=CC=2)=C1C1=CC=CC=C1 GGUFVZFOCZNPEG-UHFFFAOYSA-N 0.000 description 1
- HLBLWEWZXPIGSM-UHFFFAOYSA-N 4-Aminophenyl ether Chemical group C1=CC(N)=CC=C1OC1=CC=C(N)C=C1 HLBLWEWZXPIGSM-UHFFFAOYSA-N 0.000 description 1
- DZIHTWJGPDVSGE-UHFFFAOYSA-N 4-[(4-aminocyclohexyl)methyl]cyclohexan-1-amine Chemical compound C1CC(N)CCC1CC1CCC(N)CC1 DZIHTWJGPDVSGE-UHFFFAOYSA-N 0.000 description 1
- BDBZTOMUANOKRT-UHFFFAOYSA-N 4-[2-(4-aminocyclohexyl)propan-2-yl]cyclohexan-1-amine Chemical compound C1CC(N)CCC1C(C)(C)C1CCC(N)CC1 BDBZTOMUANOKRT-UHFFFAOYSA-N 0.000 description 1
- SLXKOJJOQWFEFD-UHFFFAOYSA-N 6-aminohexanoic acid Chemical compound NCCCCCC(O)=O SLXKOJJOQWFEFD-UHFFFAOYSA-N 0.000 description 1
- 239000004953 Aliphatic polyamide Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 235000010469 Glycine max Nutrition 0.000 description 1
- 244000068988 Glycine max Species 0.000 description 1
- 101000576320 Homo sapiens Max-binding protein MNT Proteins 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
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- WPWNSTTVSOUHRP-UHFFFAOYSA-N [1-(aminomethyl)naphthalen-2-yl]methanamine Chemical group C1=CC=CC2=C(CN)C(CN)=CC=C21 WPWNSTTVSOUHRP-UHFFFAOYSA-N 0.000 description 1
- QLBRROYTTDFLDX-UHFFFAOYSA-N [3-(aminomethyl)cyclohexyl]methanamine Chemical compound NCC1CCCC(CN)C1 QLBRROYTTDFLDX-UHFFFAOYSA-N 0.000 description 1
- OXIKYYJDTWKERT-UHFFFAOYSA-N [4-(aminomethyl)cyclohexyl]methanamine Chemical compound NCC1CCC(CN)CC1 OXIKYYJDTWKERT-UHFFFAOYSA-N 0.000 description 1
- IUHFWCGCSVTMPG-UHFFFAOYSA-N [C].[C] Chemical group [C].[C] IUHFWCGCSVTMPG-UHFFFAOYSA-N 0.000 description 1
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- GEQHKFFSPGPGLN-UHFFFAOYSA-N cyclohexane-1,3-diamine Chemical compound NC1CCCC(N)C1 GEQHKFFSPGPGLN-UHFFFAOYSA-N 0.000 description 1
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- PWSKHLMYTZNYKO-UHFFFAOYSA-N heptane-1,7-diamine Chemical compound NCCCCCCCN PWSKHLMYTZNYKO-UHFFFAOYSA-N 0.000 description 1
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- KYTZHLUVELPASH-UHFFFAOYSA-N naphthalene-1,2-dicarboxylic acid Chemical compound C1=CC=CC2=C(C(O)=O)C(C(=O)O)=CC=C21 KYTZHLUVELPASH-UHFFFAOYSA-N 0.000 description 1
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- ABMFBCRYHDZLRD-UHFFFAOYSA-N naphthalene-1,4-dicarboxylic acid Chemical compound C1=CC=C2C(C(=O)O)=CC=C(C(O)=O)C2=C1 ABMFBCRYHDZLRD-UHFFFAOYSA-N 0.000 description 1
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- VAWFFNJAPKXVPH-UHFFFAOYSA-N naphthalene-1,6-dicarboxylic acid Chemical compound OC(=O)C1=CC=CC2=CC(C(=O)O)=CC=C21 VAWFFNJAPKXVPH-UHFFFAOYSA-N 0.000 description 1
- JSKSILUXAHIKNP-UHFFFAOYSA-N naphthalene-1,7-dicarboxylic acid Chemical compound C1=CC=C(C(O)=O)C2=CC(C(=O)O)=CC=C21 JSKSILUXAHIKNP-UHFFFAOYSA-N 0.000 description 1
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- SXJVFQLYZSNZBT-UHFFFAOYSA-N nonane-1,9-diamine Chemical compound NCCCCCCCCCN SXJVFQLYZSNZBT-UHFFFAOYSA-N 0.000 description 1
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- KOUDKOMXLMXFKX-UHFFFAOYSA-N sodium oxido(oxo)phosphanium hydrate Chemical compound O.[Na+].[O-][PH+]=O KOUDKOMXLMXFKX-UHFFFAOYSA-N 0.000 description 1
- UYCAUPASBSROMS-AWQJXPNKSA-M sodium;2,2,2-trifluoroacetate Chemical compound [Na+].[O-][13C](=O)[13C](F)(F)F UYCAUPASBSROMS-AWQJXPNKSA-M 0.000 description 1
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- HQHCYKULIHKCEB-UHFFFAOYSA-N tetradecanedioic acid Natural products OC(=O)CCCCCCCCCCCCC(O)=O HQHCYKULIHKCEB-UHFFFAOYSA-N 0.000 description 1
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- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000001721 transfer moulding Methods 0.000 description 1
- PXXNTAGJWPJAGM-UHFFFAOYSA-N vertaline Natural products C1C2C=3C=C(OC)C(OC)=CC=3OC(C=C3)=CC=C3CCC(=O)OC1CC1N2CCCC1 PXXNTAGJWPJAGM-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
- C08G69/265—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids from at least two different diamines or at least two different dicarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
- C08K5/3477—Six-membered rings
- C08K5/3492—Triazines
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
- D01F1/106—Radiation shielding agents, e.g. absorbing, reflecting agents
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/60—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyamides
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/78—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products
- D01F6/80—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products from copolyamides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2377/06—Polyamides derived from polyamines and polycarboxylic acids
Definitions
- the present invention relates to resin compositions and molded articles.
- Polyamide resin is known as a resin with excellent moldability, mechanical properties, and chemical resistance. Therefore, it is widely used as various parts materials for automobiles, electric and electronic products, industrial materials, industrial materials, and daily and household items. In particular, in recent years, the environment in which polyamide resins are used has become severe both thermally and mechanically. Therefore, there is a demand for a polyamide resin material that exhibits less deterioration in mechanical strength even when used outdoors.
- Patent Document 1 discloses (A) an aliphatic polyamide, (B) a semi-aromatic polyamide containing a diamine unit and a dicarboxylic acid unit, (C1) a flame retardant, (C2) a flame retardant aid, and (D) A polyamide composition containing a white pigment and (E) an ultraviolet absorber, wherein the polyamide composition has a tan ⁇ peak temperature of 90° C. or higher, and (D) the white pigment contained in the polyamide composition
- a polyamide composition is disclosed in which the mass ratio (E)/(D) of the (E) ultraviolet absorber to the (E) is 0.15 or more and less than 2.50.
- Patent Document 1 teaches that the resin composition can form molded articles having good weld strength and Rockwell hardness when water is absorbed, surface appearance, and weather discoloration resistance.
- a polyamide resin synthesized from xylylenediamine and an aliphatic dicarboxylic acid is a resin excellent in various physical properties, but its strength is greatly reduced by ultraviolet rays. In other words, the intensity decreased remarkably from the initial state when the ultraviolet light was irradiated for a long period of time.
- An object of the present invention is to solve such problems, and it is possible to provide a molded product that can suppress the increase in YI value and can maintain high strength even when irradiated with ultraviolet light for a long time.
- An object of the present invention is to provide a resin composition and a molded article formed from the resin composition.
- the triazine-based ultraviolet absorber has an absorbance of 0.50 or more at a wavelength of 290 nm in the state of a 10 mg / L chloroform solution, and the content of the triazine-based ultraviolet absorber is relative to the total mass of the resin composition. is 0.5% by mass or more, the resin composition.
- ⁇ 2> The resin composition according to ⁇ 1>, wherein the ⁇ , ⁇ -linear aliphatic dicarboxylic acid having 6 to 14 carbon atoms comprises an ⁇ , ⁇ -linear aliphatic dicarboxylic acid having 8 to 14 carbon atoms. . ⁇ 3>
- ⁇ 4> The resin composition according to ⁇ 1>, wherein the ⁇ , ⁇ -linear aliphatic dicarboxylic acid having 6 to 14 carbon atoms comprises dodecanedioic acid.
- ⁇ 5> The resin composition according to any one of ⁇ 1> to ⁇ 4>, wherein the triazine-based UV absorber contains a UV absorber represented by the following formula (1).
- formula (1) (In formula (1), R is each independently an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 15 carbon atoms, or a hydroxyl group, and n is each independently an integer of 0 to 4 is.)
- ⁇ 6> The resin composition according to any one of ⁇ 1> to ⁇ 5>, wherein the content of the xylylenediamine-based polyamide resin is 90.0% by mass or more relative to the total mass of the polyamide resin. .
- ⁇ 7> The resin composition according to any one of ⁇ 1> to ⁇ 6>, which is for extrusion molding.
- ⁇ 8> A molded article formed from the resin composition according to any one of ⁇ 1> to ⁇ 7>.
- ⁇ 9> The molded article according to ⁇ 8>, wherein the molded article is an extruded article.
- ⁇ 10> The molded article according to ⁇ 8>, wherein the molded article is a film.
- ⁇ 11> The molded article according to ⁇ 8>, wherein the molded article is a fiber.
- a resin composition that can provide a molded product that can suppress an increase in the YI value and maintain a high strength even when irradiated with ultraviolet light for a long time, and a molding formed from the resin composition. products became available.
- the resin composition of the present embodiment is a resin composition containing a polyamide resin and a triazine-based ultraviolet absorber, wherein the polyamide resin includes a structural unit derived from a diamine and a structural unit derived from a dicarboxylic acid, and is derived from the diamine. 70 mol% or more of the structural units are derived from xylylenediamine, and 70 mol% or more of the structural units derived from the dicarboxylic acid are derived from ⁇ , ⁇ -linear aliphatic dicarboxylic acids having 6 to 14 carbon atoms.
- An amine-based polyamide resin is included, and the triazine-based ultraviolet absorber has an absorbance of 0.50 or more at a wavelength of 290 nm in a 10 mg/L chloroform solution, and the content of the triazine-based ultraviolet absorber is greater than or equal to the resin composition. It is characterized by being 0.5% by mass or more with respect to the total mass of the product. With such a configuration, it is possible to obtain a resin composition that can provide a molded article that can suppress an increase in the YI value and maintain high strength even when irradiated with ultraviolet light for a long time.
- a triazine-based UV absorber having an absorbance of 0.50 or more at a wavelength of 290 nm in a 10 mg/L chloroform solution is sometimes referred to as a "specific triazine-based UV absorber.”
- Polyamide resins tend to lose strength when irradiated with light having a wavelength of 280 to 300 nm. It is presumed that this is because the main chain of the polyamide resin, especially the carbon-carbon chain next to the amide bond, is likely to be cut when this region is irradiated with light. In this embodiment, it is presumed that cutting of the main chain of the polyamide resin is suppressed by using an ultraviolet absorber having a high absorbability for light with a wavelength of 290 nm. In particular, when the main chain of the polyamide resin is cut by ultraviolet irradiation, the cross-linking reaction proceeds, resulting in brittleness and reduced strength.
- the resin composition of this embodiment contains a polyamide resin.
- the polyamide resin used in the present embodiment may be a crystalline polyamide resin or an amorphous polyamide resin, but is preferably a crystalline polyamide resin.
- a crystalline polyamide resin is one that exhibits a melting point as measured by a differential scanning calorimeter (DSC).
- the polyamide resin contains a diamine-derived structural unit and a dicarboxylic acid-derived structural unit, 70 mol% or more of the diamine-derived structural unit is derived from xylylenediamine, and 70 mol of the dicarboxylic acid-derived structural unit % or more of xylylenediamine-based polyamide resin derived from ⁇ , ⁇ -linear aliphatic dicarboxylic acid having 6 to 14 carbon atoms.
- xylylenediamine-based polyamide resin By containing the xylylenediamine-based polyamide resin, a molded article having excellent physical properties can be obtained.
- the diamine-derived structural unit of the xylylenediamine-based polyamide resin is preferably 80 mol% or more, more preferably 85 mol% or more, still more preferably 90 mol% or more, and still more preferably 95 mol% or more of xylylenediamine. derived from Further, 100 mol % or less of the diamine-derived constitutional units of the xylylenediamine-based polyamide resin may be derived from xylylenediamine.
- Xylylenediamine preferably contains 0 to 100 mol% meta-xylylenediamine and 100 to 0 mol% para-xylylenediamine, and preferably contains 10 to 100 mol% meta-xylylenediamine and 90 to 0 mol% para-xylylenediamine. More preferably, xylylenediamine is contained, more preferably 20 to 100 mol% of meta-xylylenediamine and 80 to 0 mol% of para-xylylenediamine, and 50 to 90 mol% of meta-xylylenediamine and 50 More preferably it contains ⁇ 10 mole % para-xylylenediamine. The total amount of meta-xylylenediamine and para-xylylenediamine is preferably 90 mol % or more, and does not exceed 100 mol %.
- the dicarboxylic acid-derived structural unit of the xylylenediamine-based polyamide resin preferably has a carbon number of 80 mol% or more, more preferably 85 mol% or more, still more preferably 90 mol% or more, and still more preferably 95 mol% or more. derived from 6-14 ⁇ , ⁇ -straight-chain aliphatic dicarboxylic acids. Further, 100 mol % or less of the dicarboxylic acid-derived constitutional units of the xylylenediamine-based polyamide resin may be derived from an ⁇ , ⁇ -straight-chain aliphatic dicarboxylic acid having 6 to 14 carbon atoms.
- the ⁇ , ⁇ -straight chain aliphatic dicarboxylic acid having 6 to 14 carbon atoms preferably includes ⁇ , ⁇ -straight chain aliphatic dicarboxylic acid having 8 to 14 carbon atoms.
- ⁇ , ⁇ -straight-chain aliphatic dicarboxylic acid having 8 or more carbon atoms By using an ⁇ , ⁇ -straight-chain aliphatic dicarboxylic acid having 8 or more carbon atoms, the number of amide bonds in the resin is relatively reduced, and the frequency of breaking of the main chain of the polyamide resin due to ultraviolet irradiation is reduced. can be done.
- Adipic acid, sebacic acid, suberic acid, dodecanedioic acid, eicodioic acid, and the like can be preferably used as ⁇ , ⁇ -straight-chain aliphatic dicarboxylic acids having 6 to 14 carbon atoms. Acids are more preferred, sebacic acid and/or dodecanedioic acid are more preferred, and dodecanedioic acid is even more preferred.
- diamines other than xylylenediamine that can be used as the raw material diamine component of the xylylenediamine-based polyamide resin include tetramethylenediamine, pentamethylenediamine, 2-methylpentanediamine, hexamethylenediamine, heptamethylenediamine, octamethylenediamine, Aliphatic diamines such as nonamethylenediamine, decamethylenediamine, dodecamethylenediamine, 2,2,4-trimethyl-hexamethylenediamine, 2,4,4-trimethylhexamethylenediamine, 1,3-bis(aminomethyl)cyclohexane , 1,4-bis(aminomethyl)cyclohexane, 1,3-diaminocyclohexane, 1,4-diaminocyclohexane, bis(4-aminocyclohexyl)methane, 2,2-bis(4-aminocyclohexyl)propan
- dicarboxylic acid components other than the ⁇ , ⁇ -linear aliphatic dicarboxylic acids having 6 to 14 carbon atoms include phthalic acid compounds such as isophthalic acid, terephthalic acid and orthophthalic acid, 1,2-naphthalenedicarboxylic acid, 1,3 -naphthalenedicarboxylic acid, 1,4-naphthalenedicarboxylic acid, 1,5-naphthalenedicarboxylic acid, 1,6-naphthalenedicarboxylic acid, 1,7-naphthalenedicarboxylic acid, 1,8-naphthalenedicarboxylic acid, 2,3-naphthalene Naphthalenedicarboxylic acid isomers such as dicarboxylic acid, 2,6-naphthalenedicarboxylic acid, and 2,7-naphthalenedicarboxylic acid can be exemplified, and one or a mixture of two or more thereof can be used.
- phthalic acid compounds such as isophthalic acid,
- the xylylenediamine-based polyamide resin used in the present embodiment is composed mainly of diamine-derived structural units and dicarboxylic acid-derived structural units, but does not completely exclude structural units other than these. - Needless to say, structural units derived from lactams such as caprolactam and laurolactam, and aliphatic aminocarboxylic acids such as aminocaproic acid and aminoundecanoic acid may be included.
- the term "main component" as used herein means that among the constituent units constituting the xylylenediamine-based polyamide resin, the total number of constituent units derived from diamine and constituent units derived from dicarboxylic acid is the largest among all constituent units.
- the sum of diamine-derived structural units and dicarboxylic acid-derived structural units in the xylylenediamine-based polyamide resin preferably accounts for 90% by mass or more of all structural units, and preferably 95% by mass or more. is more preferable, and more preferably 98% by mass or more of all structural units excluding terminal groups.
- All (100% by mass) of the polyamide resin contained in the resin composition of the present embodiment may be a xylylenediamine-based polyamide resin, or may contain other polyamide resins.
- Other polyamide resins include semi-aromatic polyamide resins such as terephthalic acid-based polyamide resins (polyamide 6T, polyamide 9T, polyamide 10T, polyamide 6T/6I), polyamide 6, polyamide 11, polyamide 12, polyamide 46, and polyamide 66. , polyamide 610, polyamide 612, polyamide 6/66, and polyamide 1010.
- polyamide 6 is a ring-opening polymer of caprolactam, but within the scope of the present invention (for example, 5% by mass or less, further 3% by mass or less, particularly 1% by mass or less of the total) This is to the effect that it may contain structural units derived from other monomers.
- Other polyamide resins such as polyamide 66 are considered in the same way.
- the content of the xylylenediamine-based polyamide resin is preferably 90.0% by mass or more with respect to the total mass of the polyamide resin contained in the resin composition, and 93.0% by mass or more. more preferably 97.0% by mass or more.
- the resin composition of the present embodiment may contain two or more types of xylylenediamine-based polyamide resins, and when two or more types are contained, the total amount is preferably within the above range.
- the weight average molecular weight (Mw) of the polyamide resin (preferably xylylenediamine-based polyamide resin) used in the present embodiment is preferably 8,000 or more, more preferably 10,000 or more, and 20,000. More preferably, it is 30,000 or more, and even more preferably 35,000 or more. Further, the weight average molecular weight (Mw) of the polyamide resin used in the present embodiment is preferably 100,000 or less, more preferably 96,000 or less, and further preferably 94,000 or less. It may be 60,000 or less.
- the number average molecular weight (Mn) of the polyamide resin used in the present embodiment is preferably 6,000 or more, more preferably 8,000 or more, and further preferably 10,000 or more. 000 or more is more preferable.
- the number average molecular weight (Mn) of the polyamide resin (preferably xylylenediamine-based polyamide resin) used in the present embodiment is preferably 50,000 or less, more preferably 48,000 or less, and 46 ,000 or less, and even more preferably 40,000 or less.
- the Mw/Mn of the polyamide resin used in the present embodiment is preferably 3.50 or less, more preferably 3.00 or less, further preferably 2.50 or less, and 2.30 or less. It is more preferably 2.20 or less.
- the molecular chains when processed into a film or fiber, are uniformly oriented, resulting in good toughness and various physical properties such as water absorption resistance, chemical resistance, and heat aging resistance.
- 1.5 is the limit in the method of polymerizing by dehydration polycondensation of an aqueous nylon salt solution and the method of polymerizing by dropping diamine into molten dicarboxylic acid, which are used in general manufacturing processes. close level.
- the resin composition of the present embodiment contains two or more polyamide resins, the mixture preferably falls within the above range.
- the resin composition in the resin composition of the present embodiment may contain a polyamide resin other than the xylylenediamine-based polyamide resin.
- the content of the polyamide resin in the resin composition of the present embodiment is preferably 85% by mass or more of the resin composition, more preferably 90% by mass or more, and even more preferably 93% by mass or more. , more preferably 96% by mass or more, and even more preferably 98% by mass or more.
- the upper limit of the content of the polyamide resin is when the total of the polyamide resin and the specific triazine-based ultraviolet absorber accounts for 100% by mass of the resin composition.
- the resin composition of the present embodiment may contain only one type of polyamide resin, or may contain two or more types. When two or more types are included, the total amount is preferably within the above range.
- the resin composition of the present embodiment contains a triazine-based ultraviolet absorber (specific triazine-based ultraviolet absorber) having an absorbance of 0.50 or more at a wavelength of 290 nm in the state of a 10 mg/L chloroform solution. It contains 0.5% by mass or more of the mass.
- a lower YI value can be maintained by using an ultraviolet absorber represented by formula (1) described later.
- the specific triazine-based ultraviolet absorber has an absorbance of 0.50 or more, preferably 0.60 or more, more preferably 0.65 or more at a wavelength of 290 nm in a 10 mg/L chloroform solution. , is more preferably 0.70 or more.
- an absorbance of 0.50 or more preferably 0.60 or more, more preferably 0.65 or more at a wavelength of 290 nm in a 10 mg/L chloroform solution.
- the specific triazine-based ultraviolet absorber has an absorbance of 0.50 or more, preferably 0.60 or more, more preferably 0.65 or more at a wavelength of 290 nm in a 10 mg/L chloroform solution. , is more preferably 0.70 or more.
- the absorbance of commercially available ultraviolet absorbers is usually 1.5 or less.
- the specific triazine-based ultraviolet absorber preferably contains a triphenyltriazine structure, and is more preferably a compound represented by formula (1).
- formula (1) R is each independently an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 15 carbon atoms, or a hydroxyl group, and n is each independently an integer of 0 to 4 is.
- each R is preferably an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 4 to 15 carbon atoms, or a hydroxyl group.
- Each n is preferably an integer of 0 to 3, more preferably an integer of 0 to 2, independently.
- the compound represented by Formula (1) preferably contains the compound represented by Formula (2).
- formula (2) (In formula (2), R 2 is an alkyl group having 1 to 15 carbon atoms, R 3 is each independently an alkyl group having 1 to 10 carbon atoms, n2 is each independently It is an integer from 0 to 4.)
- R 2 is preferably an alkyl group having 4 to 15 carbon atoms, more preferably an alkyl group having 4 to 12 carbon atoms.
- Each R 3 is independently preferably an alkyl group having 1 to 5 carbon atoms, more preferably a methyl group or an ethyl group, and even more preferably a methyl group.
- Each n2 is preferably an integer of 0 to 3, more preferably an integer of 0 to 2, independently.
- the molecular weight of the specific triazine-based ultraviolet absorber is preferably 310 or more, preferably 1000 or less, more preferably 800 or less, and may be 700 or less.
- the content of the specific triazine-based ultraviolet absorber in the resin composition of the present embodiment is 0.5% by mass or more, preferably 0.6% by mass or more, and 0.8% by mass in the resin composition. It is more preferably 1.0% by mass or more, still more preferably 1.4% by mass or more, and even more preferably 1.7% by mass or more.
- the amount is at least the above lower limit, the influence of ultraviolet light on the main chain scission of the polyamide resin can be remarkably suppressed, and the decrease in strength due to the decrease in molecular weight and progress of the crosslinking reaction can be suppressed more effectively.
- the content of the specific triazine-based ultraviolet absorber in the resin composition is preferably 5.0% by mass or less, more preferably 4.0% by mass or less, and 3.5% by mass or less. and more preferably 3.0% by mass or less.
- the resin composition of the present embodiment may contain only one type of specific triazine-based ultraviolet absorber, or may contain two or more types thereof. When two or more types are included, the total amount is preferably within the above range.
- the resin composition of the present embodiment may contain other components within the scope of the present embodiment.
- additives include thermoplastic resins other than polyamide resins, fillers, UV absorbers other than specific triazine-based UV absorbers, antioxidants, hydrolysis resistance improvers, weather stabilizers, matting agents, Fluorescent whitening agents, drip prevention agents, antistatic agents, antifog agents, antiblocking agents, fluidity improvers, plasticizers, dispersants, antibacterial agents, flame retardants and the like.
- These components may be used alone or in combination of two or more.
- Thermoplastic resins other than polyamide resins include polyolefin resins such as polyethylene and polypropylene, polyester resins such as polyethylene terephthalate and polybutylene terephthalate, polycarbonate resins, polyoxymethylene resins, polyetherketone, polyethersulfone, and thermoplastic polyetherimide. etc. are exemplified.
- polyolefin resins such as polyethylene and polypropylene
- polyester resins such as polyethylene terephthalate and polybutylene terephthalate
- polycarbonate resins polyoxymethylene resins
- polyetherketone polyetherketone
- polyethersulfone polyethersulfone
- thermoplastic polyetherimide thermoplastic polyetherimide. etc.
- the resin composition of the present embodiment does not substantially contain ultraviolet absorbers other than the specific triazine-based ultraviolet absorber.
- substantially free means that the ratio of UV absorbers other than the specific triazine-based UV absorber is 5% by mass or less among the UV absorbers contained in the resin composition of the present embodiment, and 3 mass % or less, and may be 1 mass % or less.
- plasticizer examples include hexyldecyl p-hydroxybenzoate (Exepar HD-PB manufactured by Kao Corporation), ethylhexyl p-hydroxybenzoate, ethylhexyl o-hydroxybenzoate, and N-butylbenzenesulfonamide. exemplified.
- paragraphs 0033 to 0038 of WO 2017/010389 can also be considered, and the contents thereof are incorporated herein.
- the contents of the polyamide resin, the triazine-based ultraviolet absorber, and other additives are adjusted so that the total of each component is 100% by mass.
- the total amount of the polyamide resin and the triazine-based ultraviolet absorber accounts for 98% by mass or more of the resin composition.
- the resin composition of the present embodiment preferably has a small change in Mw/Mn ( ⁇ Mw/Mn) before and after ultraviolet irradiation.
- the change in Mw/Mn ( ⁇ Mw/Mn) before and after irradiation with ultraviolet rays for 400 hours with a xenon lamp (JIS K 7350-2 A method, irradiation intensity: 60 W/m 2 ). is preferably 0.70 or less, more preferably 0.50 or less, still more preferably 0.40 or less, and even more preferably 0.35 or less.
- the lower limit of ⁇ Mw/Mn is ideally 0, but practically 0.01 or more.
- the ⁇ Mw/Mn is measured according to the description of the examples below.
- the resin composition of the present embodiment has a high strength retention before and after ultraviolet irradiation.
- a xenon lamp (according to JIS K 7350-2 A method, irradiation intensity: 60 W/m 2 ) is preferably used to maintain a tensile strength retention rate of 40% or more when irradiated with ultraviolet rays for 400 hours. It is more preferably 60% or more, still more preferably 65% or more, still more preferably 70% or more, more preferably 73% or more, and even more preferably 75% or more.
- the upper limit of the tensile strength retention rate is ideally 100%, but even 90% or less sufficiently satisfies the performance requirements. The tensile strength retention rate is measured in accordance with the description of Examples described later.
- the resin composition of the present embodiment can suppress a change in color before and after ultraviolet irradiation.
- the YI value after irradiation with ultraviolet rays for 400 hours by a xenon lamp (JIS K 7350-2 A method, irradiation intensity: 60 W/m 2 ) is preferably 15 or less, preferably 10 or less. more preferably 7 or less, even more preferably 6 or less, and even more preferably 5 or less.
- the lower limit of YI is ideally 0, but practically 0.10 or more.
- the YI value after irradiation with ultraviolet rays for 400 hours from the xenon lamp (in accordance with JIS K 7350-2 A method, irradiation intensity: 60 W/m 2 ) is measured in accordance with the description of Examples described later.
- the method for producing the resin composition of the present embodiment is not particularly limited, but a method using a single-screw or twin-screw extruder having equipment for devolatilization from a vent port as a kneader is preferred.
- the polyamide resin, the triazine-based ultraviolet absorber, and other additives that are blended as necessary may be supplied collectively to the kneader, or after supplying the polyamide resin component, other You may supply a compounding component one by one. Also, two or more components selected from each component may be mixed and kneaded in advance.
- the resin composition (for example, pellets) described above is molded by various molding methods to obtain molded articles. That is, the molded article of this embodiment is molded from the resin composition of this embodiment.
- the shape of the molded product is not particularly limited and can be appropriately selected according to the use and purpose of the molded product. , odd-shaped products, hollow products, frame-shaped products, box-shaped products, panel-shaped products, button-shaped products, and the like. Among them, film-shaped, frame-shaped, panel-shaped, and button-shaped ones are preferable, and the thickness of the frame-shaped and panel-shaped ones is, for example, about 1 mm to 5 mm.
- the method for molding the molded article is not particularly limited, and conventionally known molding methods can be employed, such as injection molding, injection compression molding, extrusion molding, profile extrusion, transfer molding, blow molding, Gas-assisted blow molding method, blow molding method, extrusion blow molding method, IMC (in-mold coating molding) method, rotational molding method, multi-layer molding method, two-color molding method, insert molding method, sandwich molding method, foam molding method , pressure molding, and the like.
- the resin composition of the present embodiment is suitable for molded articles obtained by injection molding, injection compression molding, and extrusion molding, and is further suitable for molded articles obtained by extrusion (extrusion molding).
- the resin composition of the present embodiment is not limited to the molded articles obtained therefrom.
- One embodiment of the molded article formed from the resin composition of this embodiment is a film. It is particularly preferable to use it as a stretched film.
- paragraphs 0036 to 0042 of JP-A-2020-200405 can be referred to, and the contents thereof are incorporated herein.
- Another embodiment of the molded article formed from the resin composition of this embodiment is a fiber (filament).
- a fiber filament
- the resin composition and molded article of the present embodiment are suitable for applications that are exposed to ultraviolet rays for a long time. It is widely used in building materials, housing related parts, medical equipment, leisure sports equipment, play equipment, defense and aerospace products, etc.
- PA-3 MXD6 (polyamide composed of MXDA and adipic acid), manufactured by Mitsubishi Gas Chemical Company, #6000
- the internal temperature was increased, and when the temperature reached 240°C, the pressure inside the reaction vessel was reduced, and the internal temperature was further increased to continue the melt polycondensation reaction at 250°C for 10 minutes. Thereafter, the inside of the system was pressurized with nitrogen, and the obtained polymer was taken out from the strand die and pelletized to obtain a polyamide resin.
- the internal temperature was increased, and when the temperature reached 240°C, the pressure inside the reaction vessel was reduced, and the internal temperature was further increased to continue the melt polycondensation reaction at 250°C for 10 minutes. Thereafter, the inside of the system was pressurized with nitrogen, and the obtained polymer was taken out from the strand die and pelletized to obtain a polyamide resin.
- ⁇ Number average molecular weight (Mn) and weight average molecular weight (Mw)> The number average molecular weight (Mn) and weight average molecular weight (Mw) of the polyamide resin and resin composition were measured according to GPC measurement. Specifically, "HLC-8320GPC” manufactured by Tosoh Corporation is used as an apparatus, two “TSK gel Super HM-H” manufactured by Tosoh Corporation are used as columns, and hexafluoroisopropanol having a sodium trifluoroacetate concentration of 10 mmol/L is used as an eluent. (HFIP), resin concentration 0.02% by mass, column temperature 40° C., flow rate 0.3 mL/min. A calibration curve was prepared by dissolving 6 levels of PMMA in HFIP and measuring.
- UVA-1 KEMISORB 102, manufactured by Chemipro Kasei Co., Ltd.
- UVA-2 TINUVIN 1577ED, manufactured by BASF
- UVA-3 ADEKA STAB LA-31, manufactured by ADEKA
- UVA-4 ADEKA STAB LA-F70, manufactured by ADEKA
- UV-3600Plus ultraviolet/visible/near-infrared spectrophotometer
- the resulting film was cut into 135 mm squares. After that, using a batch-type biaxial stretching device (tenter method, EX10-S5, manufactured by Toyo Seiki Seisakusho Co., Ltd.), while heating in an air atmosphere at 70 ° C., the stretching ratio is 4 times in MD (machine direction). , 2.25 times in the TD (transverse direction) and 9 times in the total draw ratio to obtain a stretched film having a thickness of 20 ⁇ m.
- the stretching temperature was 70°C. After stretching, heat setting was performed. The heat setting temperature was 180° C., and the heat setting time was 30 seconds.
- Mn number average molecular weight
- Mw weight average molecular weight
- YI ⁇ Yellowness index
- ⁇ Solubility in HFIP> The solubility of the resin composition in hexafluoro-2-propanol (HFIP) was evaluated as follows. After weighing 5 mg of sample (the resulting film) into a 13.5 cc vial, 5 g of HFIP was added. The mixture was shaken every 30 minutes, and the state after 2 hours from the addition of HFIP was visually confirmed to judge the solubility. As the cross-linking reaction progresses, the resin composition tends to become brittle. Therefore, the solubility of the sample during GPC measurement was determined as follows. A: dissolved without problems (no cross-linking observed) B: Other than A and C, for example, some undissolved substances are generated (crosslinking progresses in part), etc. C: Partly dissolved, but many undissolved substances (crosslinking reaction progresses in most parts)
- the tensile strength of the obtained stretched film was measured according to JIS K 7127 using a strip of 10 mm width at a test speed of 50 mm/min. For the measurement, a tensile test was performed on the MD of the stretched film, and the chuck-to-chuck distance was set to 50 mm. The tensile speed was set at 50 mm/min. The measurement environment was an atmosphere of 23° C. and a relative humidity (RH) of 50%. Then, the stretched film thus obtained was cut into 100 mm squares and continuously irradiated with ultraviolet light for 400 hours under the same conditions as for the unstretched film.
- RH relative humidity
- the molded article formed from the resin composition of the present invention had a suppressed increase in YI and had a high strength retention even after being irradiated with ultraviolet rays. In addition, it was found that the increase in ⁇ Mw/Mn was suppressed, and the progress of the cross-linking reaction of the molded article could be suppressed during the ultraviolet irradiation.
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Abstract
Description
一方、キシリレンジアミンと脂肪族ジカルボン酸から合成されるポリアミド樹脂は、各種物性に優れた樹脂であるが、紫外線による強度低下が大きい。すなわち、長時間紫外光を照射した際の初期状態からの強度低下が著しかった。
本発明では、かかる課題を解決することを目的とするものであって、長時間紫外光を照射しても、YI値の上昇が抑制され、かつ、強度を高く維持できる成形品を提供可能な樹脂組成物、および、前記樹脂組成物から形成された成形品を提供することを目的とする。
具体的には、下記手段により、上記課題は解決された。
<1>ポリアミド樹脂とトリアジン系紫外線吸収剤を含む樹脂組成物であって、前記ポリアミド樹脂は、ジアミン由来の構成単位とジカルボン酸由来の構成単位とを含み、前記ジアミン由来の構成単位の70モル%以上がキシリレンジアミンに由来し、前記ジカルボン酸由来の構成単位の70モル%以上が炭素数6~14のα,ω-直鎖脂肪族ジカルボン酸に由来するキシリレンジアミン系ポリアミド樹脂を含み、前記トリアジン系紫外線吸収剤は、10mg/Lのクロロホルム溶液の状態において、波長290nmにおける吸光度が0.50以上であり、前記トリアジン系紫外線吸収剤の含有量が、樹脂組成物の総質量に対して0.5質量%以上である、樹脂組成物。
<2>前記炭素数6~14のα,ω-直鎖脂肪族ジカルボン酸が、炭素数8~14のα,ω-直鎖脂肪族ジカルボン酸を含む、<1>に記載の樹脂組成物。
<3>前記炭素数6~14のα,ω-直鎖脂肪族ジカルボン酸が、セバシン酸および/またはドデカン二酸を含む、<1>に記載の樹脂組成物。
<4>前記炭素数6~14のα,ω-直鎖脂肪族ジカルボン酸が、ドデカン二酸を含む、<1>に記載の樹脂組成物。
<5>前記トリアジン系紫外線吸収剤が、下記式(1)で表される紫外線吸収剤を含む、<1>~<4>のいずれか1つに記載の樹脂組成物。
式(1)
<6>前記キシリレンジアミン系ポリアミド樹脂の含有量が、ポリアミド樹脂の総質量に対して90.0質量%以上である、<1>~<5>のいずれか1つに記載の樹脂組成物。
<7>押出成形用である、<1>~<6>のいずれか1つに記載の樹脂組成物。
<8><1>~<7>のいずれか1つに記載の樹脂組成物から形成された成形品。
<9>前記成形品が、押出成形品である、<8>に記載の成形品。
<10>前記成形品が、フィルムである、<8>に記載の成形品。
<11>前記成形品が、繊維である、<8>に記載の成形品。
なお、本明細書において「~」とはその前後に記載される数値を下限値および上限値として含む意味で使用される。
本明細書において、各種物性値および特性値は、特に述べない限り、23℃におけるものとする。
本明細書で示す規格が年度によって、測定方法等が異なる場合、特に述べない限り、2021年1月1日時点における規格に基づくものとする。
このような構成とすることにより、長時間紫外光を照射しても、YI値の上昇が抑制され、かつ、強度を高く維持できる成形品を提供可能な樹脂組成物が得られる。
本明細書においては、10mg/Lのクロロホルム溶液の状態において、波長290nmにおける吸光度が0.50以上であるトリアジン系紫外線吸収剤を、「特定トリアジン系紫外線吸収剤」ということがある。
特に、紫外線照射により、ポリアミド樹脂の主鎖の切断が起きると、架橋反応が進行し、もろくなり、強度が落ちてしまう。特に、ポリアミド樹脂の主鎖の切断が起きて、架橋反応が進行すると、Mwの値は高くなるが、Mnの値は変化が小さい。すなわち、ΔMw/Mnが大きくなってしまう。本実施形態では、長時間紫外線を照射しても、ΔMw/Mnの上昇を抑制することにより、高い強度保持率を達成していると推測される。
また、トリアジン系紫外線吸収剤を用いることにより、加工時、特に、押出成形時の耐熱性に優れたものとすることができる。
本実施形態の樹脂組成物は、ポリアミド樹脂を含む。本実施形態で用いるポリアミド樹脂は、結晶性ポリアミド樹脂であっても、非晶性ポリアミド樹脂であってもよいが、好ましくは結晶性ポリアミド樹脂である。結晶性ポリアミド樹脂とは、示差走査熱量計(DSC)測定で融点を示すものをいう。
前記ポリアミド樹脂は、ジアミン由来の構成単位とジカルボン酸由来の構成単位とを含み、前記ジアミン由来の構成単位の70モル%以上がキシリレンジアミンに由来し、前記ジカルボン酸由来の構成単位の70モル%以上が炭素数6~14のα,ω-直鎖脂肪族ジカルボン酸に由来するキシリレンジアミン系ポリアミド樹脂を含む。キシリレンジアミン系ポリアミド樹脂を含むことにより、各種物性に優れた成形品が得られる。
キシリレンジアミンは、0~100モル%のメタキシリレンジアミンと100~0モル%のパラキシリレンジアミンを含むことが好ましく、10~100モル%のメタキシリレンジアミンと90~0モル%のパラキシリレンジアミンを含むことがより好ましく、20~100モル%のメタキシリレンジアミンと80~0モル%のパラキシリレンジアミンを含むことがさらに好ましく、50~90モル%のメタキシリレンジアミンと50~10モル%のパラキシリレンジアミンを含むことが一層好ましい。また、メタキシリレンジアミンとパラキシリレンジアミンの合計が90モル%以上であることが好ましく、また、100モル%を超えることはない。
炭素数6~14のα,ω-直鎖脂肪族ジカルボン酸は、アジピン酸、セバシン酸、スベリン酸、ドデカン二酸、エイコジオン酸などが好適に使用でき、アジピン酸、セバシン酸、および、ドデカン二酸がより好ましく、セバシン酸および/またはドデカン二酸がさらに好ましく、ドデカン二酸が一層好ましい。
他のポリアミド樹脂としては、テレフタル酸系ポリアミド樹脂(ポリアミド6T、ポリアミド9T、ポリアミド10T、ポリアミド6T/6I)等の半芳香族ポリアミド樹脂や、ポリアミド6、ポリアミド11、ポリアミド12、ポリアミド46、ポリアミド66、ポリアミド610、ポリアミド612、ポリアミド6/66、ポリアミド1010等の脂肪族ポリアミド樹脂が挙げられる。
尚、例えば、ポリアミド6は、カプロラクタムの開環重合体であるが、本発明の趣旨を逸脱しない範囲(例えば、全体の5質量%以下、さらには3質量%以下、特には1質量%以下)で、他のモノマー由来の構成単位を含んでいてもよい趣旨である。ポリアミド66等他のポリアミド樹脂についても同様に考える。
本実施形態の樹脂組成物は、2種以上のキシリレンジアミン系ポリアミド樹脂を含んでいてもよく、2種以上含む場合、合計量が上記範囲となることが好ましい。
本実施形態で用いるポリアミド樹脂の数平均分子量(Mn)は、6,000以上であることが好ましく、8,000以上であることがより好ましく、10,000以上であることがさらに好ましく、19,000以上であることが一層好ましい。また、本実施形態で用いるポリアミド樹脂(好ましくはキシリレンジアミン系ポリアミド樹脂)の数平均分子量(Mn)は、50,000以下であることが好ましく、48,000以下であることがより好ましく、46,000以下であることがさらに好ましく、40,000以下であることが一層好ましい。
本実施形態で用いるポリアミド樹脂のMw/Mnは、3.50以下であることが好ましく、3.00以下であることがより好ましく、2.50以下であることがさらに好ましく、2.30以下であることが一層好ましく、2.20以下であることがより一層好ましい。前記上限値以下とすることにより、溶融時の流動性や溶融粘度の安定性が増し、溶融混練や溶融成形の加工性が良好となる。また、フィルムや繊維に加工した際に、分子鎖が均一に配向する為、靭性が良好となり、耐吸水性、耐薬品性、耐熱老化性といった諸物性も良好となる傾向にある。下限値は特にないが、一般的な製造プロセスに用いられる、ナイロン塩水溶液の脱水重縮合により重合する方法や溶融ジカルボン酸中にジアミンを滴下する方法により重合する方法では、1.5が限界に近いレベルである。
本実施形態の樹脂組成物が2種以上のポリアミド樹脂を含む場合、混合物が上記範囲となることが好ましい。
本実施形態の樹脂組成物は、ポリアミド樹脂を1種のみ含んでいてもよいし、2種以上含んでいてもよい。2種以上含む場合、合計量が上記範囲となることが好ましい。
本実施形態の樹脂組成物は、10mg/Lのクロロホルム溶液の状態において、波長290nmにおける吸光度が0.50以上であるトリアジン系紫外線吸収剤(特定トリアジン系紫外線吸収剤)を、樹脂組成物の総質量に対して0.5質量%以上含む。このような構成とすることにより、得られる成形品について、耐光性試験後も機械的強度を維持することができる。さらに、後述する式(1)で表される紫外線吸収剤を用いることにより、より低いYI値を維持できる。
特定トリアジン系紫外線吸収剤は、10mg/Lのクロロホルム溶液の状態において、波長290nmにおける吸光度が0.50以上であり、0.60以上であることが好ましく、0.65以上であることがより好ましく、0.70以上であることがさらに好ましい。前記下限値以上とすることにより、ポリアミド樹脂の主鎖切断に影響する紫外光を効率的に吸収することができ、分子量低下と架橋反応進行による強度低下を抑制する効果がより向上する傾向にある。また、前記吸光度の上限は特にないが、市販の紫外線吸収剤の吸光度は、通常、1.5以下である。
式(1)
式(2)
式(2)において、R2は、炭素数4~15のアルキル基であることが好ましく、炭素数4~12のアルキル基であることがより好ましい。R3は、それぞれ独立に、炭素数1~5のアルキル基であることが好ましく、メチル基またはエチル基であることがより好ましく、メチル基であることがさらに好ましい。n2は、それぞれ独立に、0~3の整数であることが好ましく、0~2の整数であることがさらに好ましい。
本実施形態の樹脂組成物は、特定トリアジン系紫外線吸収剤を1種のみ含んでいてもよいし、2種以上含んでいてもよい。2種以上含む場合、合計量が上記範囲となることが好ましい。
本実施形態の樹脂組成物は、本実施形態の趣旨を逸脱しない範囲で他の成分を含んでいてもよい。このような添加剤としては、ポリアミド樹脂以外の熱可塑性樹脂、充填材、特定トリアジン系紫外線吸収剤以外の紫外線吸収剤、酸化防止剤、耐加水分解性改良剤、耐候安定剤、艶消剤、蛍光増白剤、滴下防止剤、帯電防止剤、防曇剤、アンチブロッキング剤、流動性改良剤、可塑剤、分散剤、抗菌剤、難燃剤などが挙げられる。これらの成分は、1種のみを用いてもよいし、2種以上を併用してもよい。これらの詳細は、特許第4894982号公報の段落0130~0155の記載、特開2010-281027号公報の段落0021の記載、特開2016-223037号公報の段落0036の記載を参酌でき、これらの内容は本明細書に組み込まれる。
本実施形態においては、ポリアミド樹脂以外の熱可塑性樹脂は実質的に含まないことが好ましい。実質的に含まないとは、本実施形態の樹脂組成物に含まれる樹脂成分のうち、ポリアミド樹脂以外の熱可塑性樹脂の割合が5質量%以下であることをいい、3質量%以下であることが好ましく、1質量%以下であってもよい。
本実施形態の樹脂組成物は、紫外線照射前後のMw/Mnの変化(ΔMw/Mn)が小さいことが好ましい。
具体的には、キセノンランプ(JIS K 7350-2 A法に準拠、照射強度:60 W/m2)により、紫外線を400時間照射した場合における照射前後のMw/Mnの変化(ΔMw/Mn)が0.70以下であることが好ましく、0.50以下であることがより好ましく、0.40以下であることがさらに好ましく、0.35以下であることが一層好ましい。前記ΔMw/Mnの下限は0が理想であるが、0.01以上が実際的である。
前記ΔMw/Mnは、後述する実施例の記載に従って測定される。
具体的には、キセノンランプ(JIS K 7350-2 A法に準拠、照射強度:60 W/m2)により、紫外線を400時間照射した際の引張強度保持率40%以上であることが好ましく、60%以上であることがより好ましく、65%以上であることがさらに好ましく、70%以上であることが一層好ましく、73%以上であることがより好ましく、75%以上であることがさらに一層好ましい。前記引張強度保持率の上限は100%が理想であるが、90%以下でも十分に性能要求を満たすものである。
前記引張強度保持率は、後述する実施例の記載に従って測定される。
具体的には、キセノンランプ(JIS K 7350-2 A法に準拠、照射強度:60 W/m2)により、紫外線を400時間照射した後のYI値が15以下であることが好ましく、10以下であることがより好ましく、7以下であることがさらに好ましく、6以下であることが一層好ましく、5以下であることがより一層好ましい。前記YIの下限は0が理想であるが、0.10以上が実際的である。
前記キセノンランプ(JIS K 7350-2 A法に準拠、照射強度:60 W/m2)により、紫外線を400時間照射した後のYI値は、後述する実施例の記載に従って測定される。
本実施形態の樹脂組成物の製造方法は、特に制限されないが、ベント口から脱揮できる設備を有する単軸または2軸の押出機を混練機として使用する方法が好ましい。上記ポリアミド樹脂、トリアジン系紫外線吸収剤、および、その他の必要に応じて配合される他の添加剤を、混練機に一括して供給してもよいし、ポリアミド樹脂成分を供給した後、他の配合成分を順次供給してもよい。また、各成分から選ばれた2種以上の成分を予め混合、混練しておいてもよい。
上記した樹脂組成物(例えば、ペレット)は、各種の成形法で成形して成形品とされる。すなわち、本実施形態の成形品は、本実施形態の樹脂組成物から成形される。成形品の形状としては、特に制限はなく、成形品の用途、目的に応じて適宜選択することができ、例えば、フィルム状、ロッド状、円筒状、環状、円形状、楕円形状、多角形形状、異形品、中空品、枠状、箱状、パネル状、ボタン状のもの等が挙げられる。中でも、フィルム状、枠状、パネル状、ボタン状のものが好ましく、厚さは例えば、枠状、パネル状の場合1mm~5mm程度である。
実施例で用いた測定機器等が廃番等により入手困難な場合、他の同等の性能を有する機器を用いて測定することができる。
<ポリアミド樹脂>
PA-1:MP12(MXDA、PXDAおよびドデカン二酸からなるポリアミド、MXDA/PXDA=70モル%/30モル%)
PA-2:MP10(MXDA、PXDAおよびセバシン酸からなるポリアミド、MXDA/PXDA=70モル%/30モル%)
PA-3:MXD6(MXDAおよびアジピン酸からなるポリアミド)、三菱ガス化学社製、#6000
撹拌機、分縮器、全縮器、温度計、滴下ロートおよび窒素導入管、ストランドダイを備えた反応容器に、1,12-ドデカン二酸11377g(49.4mol)および酢酸ナトリウム/次亜リン酸ナトリウム・一水和物(モル比=1/1.5)11.66gを仕込み、十分に窒素置換した後、さらに少量の窒素気流下で系内を撹搾しながら170℃まで加熱溶融した。
メタキシリレンジアミンとパラキシリレンジアミンのモル比が70/30である混合キシリレンジアミン6647g(メタキシリレンジアミン34.16mol、パラキシリレンジアミン14.64mol、三菱ガス化学社製)を、反応容器内の溶融物に撹拌下で滴下し、生成する縮合水を系外に排出しながら、内温を連続的に2.5時間かけて235℃まで昇温した。滴下終了後、内温を上昇させ、240℃に達した時点で反応容器内を減圧にし、さらに内温を上昇させて250℃で10分間、溶融重縮合反応を継続した。その後、系内を窒素で加圧し、得られた重合物をストランドダイから取り出して、ペレット化することにより、ポリアミド樹脂を得た。
撹拌機、分縮器、全縮器、温度計、滴下ロートおよび窒素導入管、ストランドダイを備えた反応容器に、セバシン酸9991g(49.4mol)および酢酸ナトリウム/次亜リン酸ナトリウム・一水和物(モル比=1/1.5)11.66gを仕込み、十分に窒素置換した後、さらに少量の窒素気流下で系内を撹搾しながら170℃まで加熱溶融した。
メタキシリレンジアミンとパラキシリレンジアミンのモル比が70/30である混合キシリレンジアミン6647g(メタキシリレンジアミン34.16mol、パラキシリレンジアミン14.64mol、三菱ガス化学社製)を、反応容器内の溶融物に撹拌下で滴下し、生成する縮合水を系外に排出しながら、内温を連続的に2.5時間かけて235℃まで昇温した。滴下終了後、内温を上昇させ、240℃に達した時点で反応容器内を減圧にし、さらに内温を上昇させて250℃で10分間、溶融重縮合反応を継続した。その後、系内を窒素で加圧し、得られた重合物をストランドダイから取り出して、ペレット化することにより、ポリアミド樹脂を得た。
ポリアミド樹脂および樹脂組成物の数平均分子量(Mn)および重量平均分子量(Mw)は、GPC測定に従って測定した。
具体的には、装置として東ソー社製「HLC-8320GPC」、カラムとして、東ソー社製「TSK gel Super HM-H」2本を使用し、溶離液トリフルオロ酢酸ナトリウム濃度10mmol/Lのヘキサフルオロイソプロパノール(HFIP)、樹脂濃度0.02質量%、カラム温度40℃、流速0.3mL/分の条件で測定し、標準ポリメチルメタクリレート換算の値として求めた。また、検量線は6水準のPMMAをHFIPに溶解させて測定し作成した。
UVA-1:KEMISORB 102、ケミプロ化成社製
紫外線吸収剤の10mg/Lのクロロホルム溶液の状態における、波長290nmにおける吸光度は以下の通り測定した。
紫外線吸収剤を10.0mg秤量し、100mLのメスフラスコに加えた。そこへクロロホルム(関東化学社製)を加えて定容した。続けて、前記溶液を1.0mLはかり取り、10mLのメスフラスコに加えた後、クロロホルムを加えて定容することで10mg/Lのクロロホルム溶液を調製した。
調整したクロロホルム溶液10mg/Lを用いて、紫外・可視・近赤外分光光度計(島津製作所社製、UV-3600Plus)により、吸光度測定を実施した。なお、測定波長領域は250~600nmとした。
<フィルムの作製>
後述する表1に示す組成となるように、樹脂組成物中の紫外線吸収剤の量が表1に示す量となるように、ポリアミド樹脂と紫外線吸収剤をそれぞれ秤量し、ドライブレンドした後、Tダイ付き二軸押出機(プラスチック工学研究所社製、PTM-30)のスクリュー根元から材料を投入して溶融混練し、幅200mm、180μmの厚みのフィルムを得た。押出機の温度設定は、280℃とした。
得られたフィルムを135mm角にカットした。その後、バッチ式二軸延伸装置(テンター法、EX10-S5、株式会社東洋精機製作所製)を用いて、70℃の大気雰囲気下にて加熱しつつ、延伸倍率がMD(machine direction)で4倍、TD(transverse direction)で2.25倍、総合延伸倍率で9倍となるように、MDおよびTDにそれぞれ延伸を行って、厚さ20μmの延伸フィルムを得た。延伸温度は70℃とした。延伸後、熱固定を行った。熱固定温度は180℃、熱固定時間は30秒とした。
得られた未延伸フィルムについて、上述の方法に従って、数平均分子量(Mn)および重量平均分子量(Mw)を測定し、さらに、Mw/Mnの値を算出した。また、以下の方法に従って、YI値を測定した。
次いで、YI値測定に使用したフィルムに対し、耐光性試験装置(商品名:サンテストXXL+、アトラス社製)を用い、キセノンランプ(JIS K 7350-2 A法に準拠、照射強度:60 W/m2)により、紫外光を400時間連続照射した。なお、試験室内温度は38℃に設定し、相対湿度は50%RHに設定して試験を実施した。照射後のフィルムについて、YI値の測定を行った後、上述の方法に従って、数平均分子量(Mn)および重量平均分子量(Mw)を測定し、Mw/Mnの値を算出した。
さらに、紫外線照射前後のMw/Mnの差(ΔMw/Mn、照射後のMw/Mn-照射前のMw/Mn)を算出した。
得られた未延伸フィルムを40mm角にカットした後、色彩・濁度測定器(商品名:COH-400A、日本電色工業社製)を使用してYI値を測定した。
樹脂組成物のヘキサフルオロ-2-プロパノール(HFIP)に対する溶解性は、以下の通り評価した。
サンプル(得られたフィルム)5mgを13.5ccバイアルに量り取った後、HFIPを5g加えた。30分おきに振とうし、HFIPを加えてから2時間経過した時の状態を目視で確認し、溶解性を判断した。
架橋反応が進行することで、樹脂組成物が脆化する傾向にあることから、GPC測定の際のサンプルの溶解性に従い、以下の通り判断した。
A:問題なく溶解(架橋はみられない)
B:AおよびC以外、例えば、一部未溶解物が発生(架橋は一部で進行)等
C:一部は溶解するが、未溶解物が多い(大部分で架橋反応が進行)
得られた延伸フィルムについて、JIS K 7127に従い、10mm幅の短冊を用い、50mm/分の試験速度で引張強度を測定した。測定に際し、延伸フィルムのMDに引張り試験を行い、チャック間距離を50mmとした。引張速度50mm/分に設定した。測定環境は、23℃、相対湿度(RH)50%の雰囲気下とした。
次いで、得られた延伸フィルムを100mm角にカットし、未延伸フィルムと同様の条件にて、紫外光を400時間連続照射した。
照射後の延伸フィルムについて、照射前と同様の方法にて引張試験を行い、引張強度を測定し、次式によって引張強度保持率を算出した。
引張強度保持率(%)=(紫外光照射前の引張強度(MPa)-紫外光照射前の引張強度(MPa))/紫外光照射前の引張強度(MPa)×100
Claims (11)
- ポリアミド樹脂とトリアジン系紫外線吸収剤を含む樹脂組成物であって、
前記ポリアミド樹脂は、ジアミン由来の構成単位とジカルボン酸由来の構成単位とを含み、前記ジアミン由来の構成単位の70モル%以上がキシリレンジアミンに由来し、前記ジカルボン酸由来の構成単位の70モル%以上が炭素数6~14のα,ω-直鎖脂肪族ジカルボン酸に由来するキシリレンジアミン系ポリアミド樹脂を含み、
前記トリアジン系紫外線吸収剤は、10mg/Lのクロロホルム溶液の状態において、波長290nmにおける吸光度が0.50以上であり、
前記トリアジン系紫外線吸収剤の含有量が、樹脂組成物の総質量に対して0.5質量%以上である、樹脂組成物。 - 前記炭素数6~14のα,ω-直鎖脂肪族ジカルボン酸が、炭素数8~14のα,ω-直鎖脂肪族ジカルボン酸を含む、請求項1に記載の樹脂組成物。
- 前記炭素数6~14のα,ω-直鎖脂肪族ジカルボン酸が、セバシン酸および/またはドデカン二酸を含む、請求項1に記載の樹脂組成物。
- 前記炭素数6~14のα,ω-直鎖脂肪族ジカルボン酸が、ドデカン二酸を含む、請求項1に記載の樹脂組成物。
- 前記キシリレンジアミン系ポリアミド樹脂の含有量が、ポリアミド樹脂の総質量に対して90.0質量%以上である、請求項1~5のいずれか1項に記載の樹脂組成物。
- 押出成形用である、請求項1~6のいずれか1項に記載の樹脂組成物。
- 請求項1~7のいずれか1項に記載の樹脂組成物から形成された成形品。
- 前記成形品が、押出成形品である、請求項8に記載の成形品。
- 前記成形品が、フィルムである、請求項8に記載の成形品。
- 前記成形品が、繊維である、請求項8に記載の成形品。
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