JP7174032B2 - 熱可塑性樹脂組成物及びこれから製造された成形品 - Google Patents
熱可塑性樹脂組成物及びこれから製造された成形品 Download PDFInfo
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- 229920005992 thermoplastic resin Polymers 0.000 title claims description 73
- 239000011342 resin composition Substances 0.000 title claims description 59
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 137
- 239000011787 zinc oxide Substances 0.000 claims description 69
- 239000000178 monomer Substances 0.000 claims description 52
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 claims description 44
- 229910000165 zinc phosphate Inorganic materials 0.000 claims description 43
- 229920002554 vinyl polymer Polymers 0.000 claims description 37
- 230000000844 anti-bacterial effect Effects 0.000 claims description 34
- 239000011248 coating agent Substances 0.000 claims description 21
- 238000000576 coating method Methods 0.000 claims description 21
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 20
- 229920000578 graft copolymer Polymers 0.000 claims description 19
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 18
- 229920006026 co-polymeric resin Polymers 0.000 claims description 18
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 17
- 239000002245 particle Substances 0.000 claims description 13
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 12
- 229920001971 elastomer Polymers 0.000 claims description 10
- 239000011347 resin Substances 0.000 claims description 10
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 8
- 229920006164 aromatic vinyl copolymer Polymers 0.000 claims description 7
- 238000011156 evaluation Methods 0.000 claims description 7
- 241000588724 Escherichia coli Species 0.000 claims description 6
- 241000191967 Staphylococcus aureus Species 0.000 claims description 6
- 229920000642 polymer Polymers 0.000 claims description 6
- 238000012258 culturing Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 239000004416 thermosoftening plastic Substances 0.000 claims 1
- RNWHGQJWIACOKP-UHFFFAOYSA-N zinc;oxygen(2-) Chemical compound [O-2].[Zn+2] RNWHGQJWIACOKP-UHFFFAOYSA-N 0.000 claims 1
- 229940077935 zinc phosphate Drugs 0.000 description 36
- 239000002253 acid Substances 0.000 description 17
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 9
- 230000000704 physical effect Effects 0.000 description 8
- -1 poly(styrene-butadiene) Polymers 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000002411 thermogravimetry Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 239000008188 pellet Substances 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- GYCMBHHDWRMZGG-UHFFFAOYSA-N Methylacrylonitrile Chemical compound CC(=C)C#N GYCMBHHDWRMZGG-UHFFFAOYSA-N 0.000 description 3
- 238000010306 acid treatment Methods 0.000 description 3
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 239000003242 anti bacterial agent Substances 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- KYPOHTVBFVELTG-OWOJBTEDSA-N (e)-but-2-enedinitrile Chemical compound N#C\C=C\C#N KYPOHTVBFVELTG-OWOJBTEDSA-N 0.000 description 2
- WAEOXIOXMKNFLQ-UHFFFAOYSA-N 1-methyl-4-prop-2-enylbenzene Chemical group CC1=CC=C(CC=C)C=C1 WAEOXIOXMKNFLQ-UHFFFAOYSA-N 0.000 description 2
- IGGDKDTUCAWDAN-UHFFFAOYSA-N 1-vinylnaphthalene Chemical compound C1=CC=C2C(C=C)=CC=CC2=C1 IGGDKDTUCAWDAN-UHFFFAOYSA-N 0.000 description 2
- CYLVUSZHVURAOY-UHFFFAOYSA-N 2,2-dibromoethenylbenzene Chemical compound BrC(Br)=CC1=CC=CC=C1 CYLVUSZHVURAOY-UHFFFAOYSA-N 0.000 description 2
- CISIJYCKDJSTMX-UHFFFAOYSA-N 2,2-dichloroethenylbenzene Chemical compound ClC(Cl)=CC1=CC=CC=C1 CISIJYCKDJSTMX-UHFFFAOYSA-N 0.000 description 2
- SBYMUDUGTIKLCR-UHFFFAOYSA-N 2-chloroethenylbenzene Chemical compound ClC=CC1=CC=CC=C1 SBYMUDUGTIKLCR-UHFFFAOYSA-N 0.000 description 2
- OYUNTGBISCIYPW-UHFFFAOYSA-N 2-chloroprop-2-enenitrile Chemical compound ClC(=C)C#N OYUNTGBISCIYPW-UHFFFAOYSA-N 0.000 description 2
- TVONJMOVBKMLOM-UHFFFAOYSA-N 2-methylidenebutanenitrile Chemical compound CCC(=C)C#N TVONJMOVBKMLOM-UHFFFAOYSA-N 0.000 description 2
- RLFXJQPKMZNLMP-UHFFFAOYSA-N 2-phenylprop-2-enenitrile Chemical compound N#CC(=C)C1=CC=CC=C1 RLFXJQPKMZNLMP-UHFFFAOYSA-N 0.000 description 2
- JLBJTVDPSNHSKJ-UHFFFAOYSA-N 4-Methylstyrene Chemical compound CC1=CC=C(C=C)C=C1 JLBJTVDPSNHSKJ-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 2
- 239000005062 Polybutadiene Substances 0.000 description 2
- QROGIFZRVHSFLM-QHHAFSJGSA-N [(e)-prop-1-enyl]benzene Chemical compound C\C=C\C1=CC=CC=C1 QROGIFZRVHSFLM-QHHAFSJGSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- MPMBRWOOISTHJV-UHFFFAOYSA-N but-1-enylbenzene Chemical compound CCC=CC1=CC=CC=C1 MPMBRWOOISTHJV-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 229920003244 diene elastomer Polymers 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- WSUTUEIGSOWBJO-UHFFFAOYSA-N dizinc oxygen(2-) Chemical compound [O-2].[O-2].[Zn+2].[Zn+2] WSUTUEIGSOWBJO-UHFFFAOYSA-N 0.000 description 2
- 238000007720 emulsion polymerization reaction Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000005227 gel permeation chromatography Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920002857 polybutadiene Polymers 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 238000010557 suspension polymerization reaction Methods 0.000 description 2
- 238000002076 thermal analysis method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 229920000800 acrylic rubber Polymers 0.000 description 1
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 238000012662 bulk polymerization Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- WCZUJLAJKYMHOK-UHFFFAOYSA-J dizinc hydrogen phosphate Chemical compound [Zn++].[Zn++].OP([O-])([O-])=O.OP([O-])([O-])=O WCZUJLAJKYMHOK-UHFFFAOYSA-J 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000010559 graft polymerization reaction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229920003049 isoprene rubber Polymers 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 238000004949 mass spectrometry Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000013081 microcrystal Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen(.) Chemical compound [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002959 polymer blend Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- SPDJAIKMJHJYAV-UHFFFAOYSA-H trizinc;diphosphate;tetrahydrate Chemical compound O.O.O.O.[Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O SPDJAIKMJHJYAV-UHFFFAOYSA-H 0.000 description 1
- 229940077934 zinc phosphate tetrahydrate Drugs 0.000 description 1
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers
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- C—CHEMISTRY; METALLURGY
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- 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
- C08L25/08—Copolymers of styrene
- C08L25/12—Copolymers of styrene with unsaturated nitriles
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
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Description
本発明の熱可塑性樹脂は、(A1)ゴム変性ビニル系グラフト共重合体及び(A2)芳香族ビニル系共重合体樹脂を含むゴム変性ビニル系共重合体樹脂であってもよい。
本発明の一具体例に係るゴム変性ビニル系グラフト共重合体は、熱可塑性樹脂組成物の耐衝撃性、成形加工性などを向上できるものであって、ゴム質重合体に芳香族ビニル系単量体及びシアン化ビニル系単量体を含む単量体混合物がグラフト重合されたものであってもよい。例えば、前記ゴム変性ビニル系グラフト共重合体は、ゴム質重合体に芳香族ビニル系単量体及びシアン化ビニル系単量体を含む単量体混合物をグラフト重合して得ることができ、必要に応じて、前記単量体混合物に加工性及び耐熱性を付与する単量体をさらに含ませてグラフト重合してもよい。前記重合は、乳化重合、懸濁重合などの公知の重合方法によって行われ得る。また、前記ゴム変性ビニル系グラフト共重合体は、コア(ゴム質重合体)-シェル(単量体混合物の共重合体)の構造を形成できるが、これに制限されない。
本発明の一具体例に係る芳香族ビニル系共重合体樹脂は、通常のゴム変性ビニル系共重合体樹脂に使用される芳香族ビニル系共重合体樹脂であってもよい。例えば、前記芳香族ビニル系共重合体樹脂は、芳香族ビニル系単量体、及びシアン化ビニル系単量体などの前記芳香族ビニル系単量体と共重合可能な単量体を含む単量体混合物の重合体であってもよい。
本発明の一具体例に係る酸化亜鉛(zinc oxide)は、熱可塑性樹脂組成物の抗菌性、耐候性などを向上できるものであって、抗菌剤として使用される通常の酸化亜鉛であってもよい。
本発明の一具体例に係るリン酸亜鉛(zinc phosphate)は、熱可塑性樹脂組成物の耐酸性などを向上できるものであって、通常のリン酸亜鉛であってもよく、例えば、酸化亜鉛とリン酸を反応させて製造したリン酸亜鉛、製品化されたリン酸亜鉛などであってもよい。
本発明の一具体例に係る表面コーティング酸化亜鉛は、前記酸化亜鉛及びリン酸亜鉛と共に、熱可塑性樹脂組成物の耐酸性、抗菌性などを向上できるものであって、前記酸化亜鉛の表面の一部又は全部がリン酸亜鉛でコーティングされたものである。
(A1)ゴム変性ビニル系グラフト共重合体
45重量%のZ-平均が310nmであるブタジエンゴムに55重量%のスチレン及びアクリロニトリル(重量比:75/25)がグラフト共重合されたg-ABSを使用した。
スチレン71重量%及びアクリロニトリル29重量%が重合されたSAN樹脂(重量平均分子量:130,000g/mol)を使用した。
平均粒子の大きさ1.2μm、BET表面積4m2/g、純度99%の値を有する酸化亜鉛を使用した。
前記酸化亜鉛をアセトン(酸化亜鉛100重量部に対して、1,000重量部)に投入及び撹拌した後、前記酸化亜鉛100重量部に対して、リン酸70重量部及び水1重量部を投入し、3分間反応させることによってリン酸亜鉛(C1):表面コーティング酸化亜鉛(D)の重量比が1:0.03になるように製造し、これを使用した。また、製造された表面コーティング酸化亜鉛(D)の透過電子顕微鏡(transmission electron microscope:TEM)写真を図1に示した。ここで、中央の濃い色部分(コア)が酸化亜鉛で、酸化亜鉛を薄く取り囲んだ淡い色部分(シェル)がリン酸亜鉛コーティング層である。
製品化されたリン酸亜鉛(zinc phosphate tetrahydrate、製造社:SBC、製品名:zinc phosphate)を使用した。
(1)平均粒子の大きさ(単位:μm):粒度分析機(ベックマン・コールター株式会社のレーザー回折式粒度分布測定装置(Laser Diffraction Particle Size Analyzer) LS I3 320装備)を用いて平均粒子の大きさ(体積平均)を測定した。
前記各構成成分を下記の表1に記載した含量で添加した後、230℃で押出しを行うことによってペレットを製造した。押出しは、L/D=36、直径45mmである二軸押出機を用いて行い、製造されたペレットは80℃で2時間以上乾燥した後、6Oz射出機(成形温度:230℃、金型温度:60℃)で射出することによって試験片を製造した。製造された試験片に対して下記の方法で物性を評価し、その結果を下記の表1に示した。
(1)抗菌活性値:JIS Z 2801抗菌評価法に基づいて、5cm×5cmの大きさの試験片に黄色ブドウ球菌及び大腸菌を接種し、35℃、RH90%の条件で24時間培養した後で測定した。
Claims (9)
- (A)(A1)ゴム変性ビニル系グラフト共重合体15重量%~50重量%及び(A2)芳香族ビニル系共重合体樹脂50重量%~85重量%を含む熱可塑性樹脂100重量部;
(B)酸化亜鉛0.1重量部~30重量部;
(C)リン酸亜鉛0.1重量部~30重量部;及び
(D)表面の一部又は全部がリン酸亜鉛でコーティングされた表面コーティング酸化亜鉛0.01重量部~3重量部;を含み、
前記熱可塑性樹脂組成物は、JIS Z 2801抗菌評価法に基づいて、3%の酢酸溶液に16時間浸漬させた5cm×5cmの大きさの試験片に黄色ブドウ球菌及び大腸菌を接種し、35℃、RH90%の条件で24時間培養した後で測定した抗菌活性値がそれぞれ独立的に2~7である ことを特徴とする熱可塑性樹脂組成物。 - 前記ゴム変性ビニル系グラフト共重合体(A1)は、ゴム質重合体に芳香族ビニル系単量体及びシアン化ビニル系単量体を含む単量体混合物がグラフト重合されたものであることを特徴とする、請求項1に記載の熱可塑性樹脂組成物。
- 前記芳香族ビニル系共重合体樹脂(A2)は、芳香族ビニル系単量体及び前記芳香族ビニル系単量体と共重合可能な単量体の重合体であることを特徴とする、請求項1に記載の熱可塑性樹脂組成物。
- 前記酸化亜鉛(B)は、平均粒子の大きさが0.5μm~3μmで、比表面積BETが1m2/g~10m2/gであることを特徴とする、請求項1に記載の熱可塑性樹脂組成物。
- 前記リン酸亜鉛(C)及び表面コーティング酸化亜鉛(D)は、前記酸化亜鉛をリン酸溶液と反応させて製造したことを特徴とする、請求項1に記載の熱可塑性樹脂組成物。
- 前記酸化亜鉛(B)とリン酸亜鉛(C)の重量比(B:C)は1:0.1~1:5であることを特徴とする、請求項1に記載の熱可塑性樹脂組成物。
- 前記リン酸亜鉛(C)と表面コーティング酸化亜鉛(D)の重量比(C:D)は1:0.01~1:0.5であることを特徴とする、請求項1に記載の熱可塑性樹脂組成物。
- 酸化亜鉛及びリン酸を反応させることによって、リン酸亜鉛と、表面に一部又は全部がリン酸亜鉛でコーティングされた表面コーティング酸化亜鉛との混合物を製造する段階;及び
前記混合物に、ゴム変性ビニル系グラフト共重合体及び芳香族ビニル系共重合体樹脂を含む熱可塑性樹脂及び酸化亜鉛をブレンディングする段階;を含む熱可塑性樹脂組成物の製造方法。 - 請求項1から7のいずれか1項による熱可塑性樹脂組成物から形成されることを特徴とする成形品。
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