JP7426344B2 - 樹脂組成物及び成形体 - Google Patents
樹脂組成物及び成形体 Download PDFInfo
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- JP7426344B2 JP7426344B2 JP2020563184A JP2020563184A JP7426344B2 JP 7426344 B2 JP7426344 B2 JP 7426344B2 JP 2020563184 A JP2020563184 A JP 2020563184A JP 2020563184 A JP2020563184 A JP 2020563184A JP 7426344 B2 JP7426344 B2 JP 7426344B2
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- styrene
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- 239000011342 resin composition Substances 0.000 title claims description 38
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 59
- 229920005989 resin Polymers 0.000 claims description 37
- 239000011347 resin Substances 0.000 claims description 37
- 229920001225 polyester resin Polymers 0.000 claims description 33
- 239000004645 polyester resin Substances 0.000 claims description 33
- 239000000178 monomer Substances 0.000 claims description 26
- 239000004925 Acrylic resin Substances 0.000 claims description 23
- 229920000178 Acrylic resin Polymers 0.000 claims description 23
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 12
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 11
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 11
- 239000004626 polylactic acid Substances 0.000 claims description 11
- 229920000098 polyolefin Polymers 0.000 claims description 8
- 229920002554 vinyl polymer Polymers 0.000 claims description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 4
- 150000002148 esters Chemical class 0.000 claims description 4
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 4
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- 125000004432 carbon atom Chemical group C* 0.000 claims description 3
- 150000001735 carboxylic acids Chemical class 0.000 claims description 3
- 150000002825 nitriles Chemical class 0.000 claims description 3
- 239000004711 α-olefin Substances 0.000 claims description 3
- -1 fatty acid alkali metal salt Chemical class 0.000 description 19
- 238000000034 method Methods 0.000 description 16
- 238000000465 moulding Methods 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 10
- 229920000642 polymer Polymers 0.000 description 10
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
- 238000001125 extrusion Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000001993 wax Substances 0.000 description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 4
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 4
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- 230000000379 polymerizing effect Effects 0.000 description 4
- 239000000047 product Substances 0.000 description 4
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- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- 229930182843 D-Lactic acid Natural products 0.000 description 3
- JVTAAEKCZFNVCJ-UWTATZPHSA-N D-lactic acid Chemical compound C[C@@H](O)C(O)=O JVTAAEKCZFNVCJ-UWTATZPHSA-N 0.000 description 3
- QZRGKCOWNLSUDK-UHFFFAOYSA-N Iodochlorine Chemical compound ICl QZRGKCOWNLSUDK-UHFFFAOYSA-N 0.000 description 3
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 3
- 229920001890 Novodur Polymers 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 3
- 229920001400 block copolymer Polymers 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 229940022769 d- lactic acid Drugs 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 150000002009 diols Chemical class 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- 229920002857 polybutadiene Polymers 0.000 description 3
- 229920002223 polystyrene Polymers 0.000 description 3
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 3
- 229920005604 random copolymer Polymers 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000012488 sample solution Substances 0.000 description 3
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 3
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 2
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 2
- WDQMWEYDKDCEHT-UHFFFAOYSA-N 2-ethylhexyl 2-methylprop-2-enoate Chemical compound CCCCC(CC)COC(=O)C(C)=C WDQMWEYDKDCEHT-UHFFFAOYSA-N 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 2
- JVTAAEKCZFNVCJ-REOHCLBHSA-N L-lactic acid Chemical compound C[C@H](O)C(O)=O JVTAAEKCZFNVCJ-REOHCLBHSA-N 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- 239000005062 Polybutadiene Substances 0.000 description 2
- 239000002174 Styrene-butadiene Substances 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 2
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 2
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- OIWOHHBRDFKZNC-UHFFFAOYSA-N cyclohexyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC1CCCCC1 OIWOHHBRDFKZNC-UHFFFAOYSA-N 0.000 description 2
- KBLWLMPSVYBVDK-UHFFFAOYSA-N cyclohexyl prop-2-enoate Chemical compound C=CC(=O)OC1CCCCC1 KBLWLMPSVYBVDK-UHFFFAOYSA-N 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 238000010097 foam moulding Methods 0.000 description 2
- 229920000578 graft copolymer Polymers 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
- 229940057995 liquid paraffin Drugs 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
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- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
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- 238000006116 polymerization reaction Methods 0.000 description 2
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- 239000012744 reinforcing agent Substances 0.000 description 2
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 239000011115 styrene butadiene Substances 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- TYFQFVWCELRYAO-UHFFFAOYSA-N suberic acid Chemical compound OC(=O)CCCCCCC(O)=O TYFQFVWCELRYAO-UHFFFAOYSA-N 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- DNIAPMSPPWPWGF-VKHMYHEASA-N (+)-propylene glycol Chemical compound C[C@H](O)CO DNIAPMSPPWPWGF-VKHMYHEASA-N 0.000 description 1
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- YPFDHNVEDLHUCE-UHFFFAOYSA-N 1,3-propanediol Substances OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 1
- OEVVKKAVYQFQNV-UHFFFAOYSA-N 1-ethenyl-2,4-dimethylbenzene Chemical compound CC1=CC=C(C=C)C(C)=C1 OEVVKKAVYQFQNV-UHFFFAOYSA-N 0.000 description 1
- NVZWEEGUWXZOKI-UHFFFAOYSA-N 1-ethenyl-2-methylbenzene Chemical compound CC1=CC=CC=C1C=C NVZWEEGUWXZOKI-UHFFFAOYSA-N 0.000 description 1
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- 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 1
- 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 1
- GPOGMJLHWQHEGF-UHFFFAOYSA-N 2-chloroethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCCl GPOGMJLHWQHEGF-UHFFFAOYSA-N 0.000 description 1
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- SCUZVMOVTVSBLE-UHFFFAOYSA-N prop-2-enenitrile;styrene Chemical compound C=CC#N.C=CC1=CC=CC=C1 SCUZVMOVTVSBLE-UHFFFAOYSA-N 0.000 description 1
- BOQSSGDQNWEFSX-UHFFFAOYSA-N propan-2-yl 2-methylprop-2-enoate Chemical compound CC(C)OC(=O)C(C)=C BOQSSGDQNWEFSX-UHFFFAOYSA-N 0.000 description 1
- LYBIZMNPXTXVMV-UHFFFAOYSA-N propan-2-yl prop-2-enoate Chemical compound CC(C)OC(=O)C=C LYBIZMNPXTXVMV-UHFFFAOYSA-N 0.000 description 1
- NHARPDSAXCBDDR-UHFFFAOYSA-N propyl 2-methylprop-2-enoate Chemical compound CCCOC(=O)C(C)=C NHARPDSAXCBDDR-UHFFFAOYSA-N 0.000 description 1
- PNXMTCDJUBJHQJ-UHFFFAOYSA-N propyl prop-2-enoate Chemical compound CCCOC(=O)C=C PNXMTCDJUBJHQJ-UHFFFAOYSA-N 0.000 description 1
- 235000013772 propylene glycol Nutrition 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 125000003011 styrenyl group Chemical group [H]\C(*)=C(/[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- HIFJUMGIHIZEPX-UHFFFAOYSA-N sulfuric acid;sulfur trioxide Chemical compound O=S(=O)=O.OS(O)(=O)=O HIFJUMGIHIZEPX-UHFFFAOYSA-N 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
- C08L101/16—Compositions of unspecified macromolecular compounds the macromolecular compounds being biodegradable
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
1.(A)スチレン系樹脂と(B)ポリエステル系樹脂とを含有する樹脂組成物であって、(A)スチレン系樹脂と(B)ポリエステル系樹脂の合計100質量部に対し、0.1質量部以上2質量部以下の(C)アクリル系樹脂と、0.1質量部以上1.5質量部以下の(D)ポリオレフィン系ワックスと、を含有し、
前記(C)アクリル系樹脂が、重量平均分子量Mwが5万以上40万以下であって、かつ炭素数が1以上20以下のアルキル基を有するアクリル系単量体と、前記アクリル系単量体と共重合可能なα-オレフィン、ビニル芳香族、不飽和ニトリル、不飽和カルボン酸又はそのエステル、エチレングリコールジ(メタ)アクリレートから選択される単量体とから構成される共重合体であることを特徴とする樹脂組成物。
2.前記(B)ポリエステル系樹脂がポリ乳酸であることを特徴とする上記1に記載の樹脂組成物。
3.前記(A)スチレン系樹脂と(B)ポリエステル系樹脂の合計100質量部において、(A)スチレン系樹脂が55質量部以上90質量部以下、(B)ポリエステル系樹脂が10質量部以上45質量部以下であることを特徴とする上記1または2に記載の樹脂組成物。
4.上記1~3のいずれかに記載の樹脂組成物からなることを特徴とする成形体。
本発明の樹脂組成物の製造方法は、特に限定されず、公知の混合技術を適用することが出来る。例えば、ミキサー型混合機、V型ブレンダー、及びタンブラー型混合機等の混合装置を用いて、各種原料を予め混合しておき、その混合物を溶融混練することによって、均一な樹脂組成物を製造することが出来る。溶融混練装置も、特に限定されないが、例えばバンバリー型ミキサー、ニーダー、ロール、単軸押出機、特殊単軸押出機、及び二軸押出機等が挙げられる。更に、押出機等の溶融混練装置の途中から他の添加剤を別途添加する方法もある。
〔材料〕
(A)スチレン系樹脂
ゴム変性耐衝撃性ポリスチレン樹脂(ゴム状重合体がポリブタジエンゴム、マトリックス部分の還元粘度0.70dl/g、ゴム状重合体含有量9.2質量%)
(B)ポリエステル系樹脂
ポリ乳酸:浙江海正生物材料社(Zhejiang Hisun Biomaterials Co.,Ltd)製「REVODE190」(D-乳酸成分の比率0.5モル%、重量平均分子量(Mw)20万)
PET:イーストマン社製「PET-G GN001」
(C)アクリル系樹脂
三菱ケミカル株式会社製「メタブレン L-1000」(重量平均分子量(Mw)25万)
三菱ケミカル株式会社製「メタブレン P-700」(重量平均分子量(Mw)45万)
(D)ポリオレフィン系ワックス
イノスペック社(Innospec Inc.)製「viscowax115」
(E)ステアリン酸亜鉛
日油株式会社製「ジンクステアレートGP」
(A)スチレン系樹脂1gにメチルエチルケトン17.5mlとアセトン17.5mlの混合溶媒を加え、温度25℃で2時間振とう溶解した後、遠心分離で不溶分を沈降させ、デカンテーションにより上澄み液を取り出し、250mlのメタノールを加えて樹脂分を析出させ、不溶分を濾過乾燥した。同操作で得られた樹脂分をトルエンに溶解してポリマー濃度0.4%(質量/体積)の試料溶液を作製した。この試料溶液、及び純トルエンを温度30℃の恒温でウベローデ型粘度計により溶液流下秒数を測定して、下式にて算出した。
ηsp/C=(t1/t0-1)/C
t0:純トルエン流下秒数
t1:試料溶液流下秒数
C:ポリマー濃度
スチレン系樹脂をクロロホルムに溶解させ、一定量の一塩化ヨウ素/氷酢酸溶液を加え暗所に約30分放置後、15質量%のヨウ化カリウム溶液と純水50mlを加え、過剰の一塩化ヨウ素を0.1Nチオ硫酸ナトリウム溶液で滴定し、付加した一塩化ヨウ素量から算出した。
樹脂組成物を二軸押出機にて50kg押出した後、ダイス出口部の目視観察により判定した。下の判定基準のうちA、Bを合格とし、Cを不合格とした。
A:メヤニが全く観察されなかった。
B:微量のメヤニが観察された。
C:明らかに問題となる量のメヤニが観察された。
上記〔材料〕に挙げた(A)スチレン系樹脂、(B)ポリエステル系樹脂、(C)アクリル系樹脂、(D)ポリオレフィン系ワックス、及び(E)ステアリン酸亜鉛を、表1、表2に示す配合量(質量部)で、ヘンシェルミキサー(三井三池化工社製「FM20B」)にて予備混合し、二軸押出機(東芝機械社製「TEM26SS」)に供給してストランドとし、水冷してからペレタイザーへ導きペレット化した。上記工程において、前記した評価方法でメヤニの発生状況を観察した。結果を表1、表2に示す。
Claims (4)
- (A)スチレン系樹脂と(B)ポリエステル系樹脂とを含有する樹脂組成物であって、(A)スチレン系樹脂と(B)ポリエステル系樹脂の合計100質量部に対し、0.1質量部以上2質量部以下の(C)アクリル系樹脂と、0.1質量部以上1.5質量部以下の(D)ポリオレフィン系ワックスと、を含有し、
前記(C)アクリル系樹脂が、重量平均分子量Mwが5万以上40万以下であって、かつ炭素数が1以上20以下のアルキル基を有するアクリル系単量体と、前記アクリル系単量体と共重合可能なα-オレフィン、ビニル芳香族、不飽和ニトリル、不飽和カルボン酸又はそのエステル、エチレングリコールジ(メタ)アクリレートから選択される単量体とから構成される共重合体であることを特徴とする樹脂組成物。 - 前記(B)ポリエステル系樹脂がポリ乳酸であることを特徴とする請求項1に記載の樹脂組成物。
- 前記(A)スチレン系樹脂と(B)ポリエステル系樹脂の合計100質量部において、(A)スチレン系樹脂が55質量部以上90質量部以下、(B)ポリエステル系樹脂が10質量部以上45質量部以下であることを特徴とする請求項1または2に記載の樹脂組成物。
- 請求項1~3のいずれか1項に記載の樹脂組成物からなることを特徴とする成形体。
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