WO2022195973A1 - 熱可塑性樹脂組成物およびその成形品 - Google Patents
熱可塑性樹脂組成物およびその成形品 Download PDFInfo
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- WO2022195973A1 WO2022195973A1 PCT/JP2021/044080 JP2021044080W WO2022195973A1 WO 2022195973 A1 WO2022195973 A1 WO 2022195973A1 JP 2021044080 W JP2021044080 W JP 2021044080W WO 2022195973 A1 WO2022195973 A1 WO 2022195973A1
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- vinyl
- resin composition
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- thermoplastic resin
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- 239000004645 polyester resin Substances 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920001955 polyphenylene ether Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 229940096992 potassium oleate Drugs 0.000 description 1
- 229940114930 potassium stearate Drugs 0.000 description 1
- MLICVSDCCDDWMD-KVVVOXFISA-M potassium;(z)-octadec-9-enoate Chemical compound [K+].CCCCCCCC\C=C/CCCCCCCC([O-])=O MLICVSDCCDDWMD-KVVVOXFISA-M 0.000 description 1
- MQOCIYICOGDBSG-UHFFFAOYSA-M potassium;hexadecanoate Chemical compound [K+].CCCCCCCCCCCCCCCC([O-])=O MQOCIYICOGDBSG-UHFFFAOYSA-M 0.000 description 1
- ANBFRLKBEIFNQU-UHFFFAOYSA-M potassium;octadecanoate Chemical compound [K+].CCCCCCCCCCCCCCCCCC([O-])=O ANBFRLKBEIFNQU-UHFFFAOYSA-M 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- FZYCEURIEDTWNS-UHFFFAOYSA-N prop-1-en-2-ylbenzene Chemical compound CC(=C)C1=CC=CC=C1.CC(=C)C1=CC=CC=C1 FZYCEURIEDTWNS-UHFFFAOYSA-N 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 239000002265 redox agent Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 description 1
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- 235000019333 sodium laurylsulphate Nutrition 0.000 description 1
- 229940048086 sodium pyrophosphate Drugs 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 229920006249 styrenic copolymer Polymers 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000010558 suspension polymerization method Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 238000003878 thermal aging Methods 0.000 description 1
- 238000012719 thermal polymerization Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- BNCXNUWGWUZTCN-UHFFFAOYSA-N trichloro(dodecyl)silane Chemical compound CCCCCCCCCCCC[Si](Cl)(Cl)Cl BNCXNUWGWUZTCN-UHFFFAOYSA-N 0.000 description 1
- RYPYGDUZKOPBEL-UHFFFAOYSA-N trichloro(hexadecyl)silane Chemical compound CCCCCCCCCCCCCCCC[Si](Cl)(Cl)Cl RYPYGDUZKOPBEL-UHFFFAOYSA-N 0.000 description 1
- PYJJCSYBSYXGQQ-UHFFFAOYSA-N trichloro(octadecyl)silane Chemical compound CCCCCCCCCCCCCCCCCC[Si](Cl)(Cl)Cl PYJJCSYBSYXGQQ-UHFFFAOYSA-N 0.000 description 1
- OYGYKEULCAINCL-UHFFFAOYSA-N triethoxy(hexadecyl)silane Chemical compound CCCCCCCCCCCCCCCC[Si](OCC)(OCC)OCC OYGYKEULCAINCL-UHFFFAOYSA-N 0.000 description 1
- FZMJEGJVKFTGMU-UHFFFAOYSA-N triethoxy(octadecyl)silane Chemical compound CCCCCCCCCCCCCCCCCC[Si](OCC)(OCC)OCC FZMJEGJVKFTGMU-UHFFFAOYSA-N 0.000 description 1
- JXUKBNICSRJFAP-UHFFFAOYSA-N triethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCOCC1CO1 JXUKBNICSRJFAP-UHFFFAOYSA-N 0.000 description 1
- 238000007666 vacuum forming Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Classifications
-
- 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
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
-
- 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
- C08K3/34—Silicon-containing compounds
-
- 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
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
-
- 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
- C08L101/12—Compositions of unspecified macromolecular compounds characterised by physical features, e.g. anisotropy, viscosity or electrical conductivity
-
- 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
- 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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—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 a halogen; Compositions of derivatives of such polymers
- C08L27/02—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 a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—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 a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08L27/18—Homopolymers or copolymers or tetrafluoroethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Definitions
- the present invention is a thermoplastic resin composition in which wollastonite is added as an inorganic filler to a polycarbonate resin in order to increase rigidity and reduce linear thermal expansion. , and a thermoplastic resin composition that has improved high rigidity, low coefficient of linear thermal expansion and high impact resistance in a well-balanced manner at a high level.
- the present invention also relates to molded articles obtained by molding this thermoplastic resin composition.
- Polycarbonate resins particularly aromatic polycarbonate resins, are excellent in moldability, mechanical properties such as impact resistance, dimensional stability, and excellent appearance of molded products.
- resin compositions obtained by alloying resins and AS resins they are used as molding materials in a wide range of industrial fields such as electric/electronic parts and vehicles.
- Vehicle parts such as automobiles, especially resin compositions for exterior parts, are required to have high rigidity, high impact resistance, high heat resistance, low coefficient of linear thermal expansion, good molded appearance, and good painted appearance.
- the actual situation is that no resin composition has been provided that satisfies all the required properties in a well-balanced manner.
- the rigidity can be increased by adding an inorganic filler.
- molding appearance and coating appearance are also impaired.
- the present invention provides a thermoplastic resin composition that satisfies the required characteristics of high rigidity, high impact resistance, high heat resistance, low coefficient of linear thermal expansion, good molding appearance, and good coating appearance at a high level and in good balance. and to provide a molded product using the same.
- the present inventors have found that by using wollastonite treated with a specific silane coupling agent as a reinforcing inorganic filler for polycarbonate resin, it is possible to achieve both high rigidity and high impact resistance at a high level.
- the present inventors have found that by blending a specific ultra-high molecular weight resin or a Teflon-based resin in a resin composition, it is possible to improve the molding appearance and coating appearance, thereby solving the above-mentioned problems.
- the gist of the present invention is as follows.
- thermoplastic resin composition containing a polycarbonate resin (A) and a wollastonite (B), a silane coupling agent in which the wollastonite (B) contains a linear alkyl group having 12 or more carbon atoms
- a thermoplastic resin composition characterized by being treated with.
- the graft copolymer (C) is obtained by graft polymerizing a monomer mixture containing at least an aromatic vinyl monomer and a vinyl cyanide monomer in the presence of a diene rubbery polymer.
- thermoplastic resin composition according to [2] or [3], which contains 0 to 20 parts by mass of coalescence (D) so that the total thereof is 100 parts by mass.
- an ultra-high molecular weight resin (E) with a weight average molecular weight of 2 million or more which is different from the polycarbonate resin (A), the graft copolymer (C) and the vinyl copolymer (D), or a Teflon-based
- thermoplastic resin composition obtained by molding the thermoplastic resin composition according to any one of [1] to [5].
- thermoplastic resin composition of the present invention the required properties such as high rigidity, high impact resistance, high heat resistance, low linear thermal expansion coefficient, good molding appearance, and good coating appearance are satisfied at a high level and in a well-balanced manner.
- Thermoplastic molded articles can be provided.
- the thermoplastic resin composition of the present invention is a thermoplastic resin composition comprising a polycarbonate (A) and a wollastonite (B), wherein the wollastonite (B) is a linear alkyl group having 12 or more carbon atoms. It is characterized by being treated with a silane coupling agent containing.
- the thermoplastic resin composition of the present invention further comprises a graft copolymer (C), a vinyl copolymer (D), an ultrahigh molecular weight resin (E) or a Teflon resin (F), and a wollastonite other than (B). of inorganic fillers.
- (co)polymerization means homopolymerization and copolymerization.
- (Meth)acrylate means at least one of acrylate and methacrylate. The same applies to "(meth)acrylic acid”.
- the polycarbonate resin (A) is obtained by an interfacial polycondensation method between a dihydroxy compound such as a dihydroxyaryl compound and phosgene, or by an ester exchange reaction (melt polycondensation) between a dihydroxy compound such as a dihydroxyaryl compound and a carbonate compound such as diphenyl carbonate. Anything obtained by a known polymerization method can be used. From the viewpoint of mechanical strength such as impact resistance, the polycarbonate resin (A) is preferably an aromatic polycarbonate resin (A).
- dihydroxyaryl compound examples include bis(4-hydroxyphenyl)methane, 1,1-bis(4-hydroxyphenyl)ethane, 2,2-bis(4-hydroxyphenyl)butane, 2,2-bis(4- hydroxyphenyl)octane, bis(4-hydroxyphenyl)propane, 2,2-bis(4-hydroxy-3-t-butylphenyl)propane, 2,2-bis(4-hydroxy-3-t-butylphenyl) Propane, 1,1-bis(4-hydroxyphenyl)cyclopentane, 1,1-bis(4-hydroxyphenyl)cyclohexane, 4,4'-dihydroxyphenyl ether, 4,4'-dihydroxyphenyl sulfide, 4,4 '-dihydroxyphenyl sulfone, 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfone, hydroquinone, resorcinol and the like.
- hydroxyaryloxy-terminated polyorganosiloxanes see, eg, US Pat. No. 3,419,634. These can be used individually by 1 type or in combination of 2 or more types. Among these, 2,2-bis(4-hydroxyphenylpropane (bisphenol A) is preferred.
- the viscosity average molecular weight of the polycarbonate resin (A) is preferably 12,000 to 40,000, more preferably 15,000 to 35,000, and particularly preferably 18,000 to 30,000.
- Two or more polycarbonate resins (A) having different molecular weights can be used as the component (A).
- the polycarbonate resin (A) obtained by interfacial polycondensation may contain various chlorine compounds. This chlorine compound may adversely affect the durability of the thermoplastic resin composition of the present invention. For this reason, the chlorine compound content of the polycarbonate resin (A) is generally 300 ppm or less, preferably 100 ppm or less, in terms of chlorine atoms.
- the untreated wollastonite used for the wollastonite (B) is not particularly limited, and any one generally used industrially can be used.
- Wollastonite (B) treated with a silane coupling agent has a mass reduction rate of 0.2 to 1.7% by mass, particularly 0.3 to 1.2 when heated from 30°C to 600°C. % by mass is preferred. If the mass reduction rate is within the above range, a sufficient effect of treatment with the silane coupling agent can be obtained, and excellent impact resistance can be exhibited.
- the wollastonite (B) used in the present invention is characterized by being treated with a silane coupling agent containing a linear alkyl group having 12 or more carbon atoms.
- the rigidity and impact resistance of the present invention can be improved at a high level. It is not possible to obtain a compatible effect.
- the alkyl group contained in the silane coupling agent preferably has 12 to 20 carbon atoms.
- Silane coupling agents containing such alkyl groups include, for example, dodecyltriethoxysilane, dodecyltrimethoxysilane, dodecyltrichlorosilane, chlorododecyldimethylsilane, hexadecyltriethoxysilane, hexadecyltrimethoxysilane, trichlorohexadecyl silane, octadecyltriethoxysilane, octadecyltrimethoxysilane, methoxydimethyloctadecylsilane, dimethyloctadecylchlorosilane, trichlorooctadecylsilane and the like. These silane coupling agents may be used alone or in combination of two or more.
- the method of surface treatment with a silane coupling agent is not particularly limited, and dry, wet, and integral blend methods can be used. Any method may be used, but a dry method or a wet method is preferred.
- the amount of wollastonite (B) treated with the silane coupling agent is not particularly limited as long as the effects of the present invention can be obtained, but the silane coupling agent is 0.3 to 3% by mass relative to the untreated wollastonite. , particularly preferably 0.5 to 2% by mass. If the amount of treatment with the silane coupling agent is within the above range, the effect of the treatment with the silane coupling agent can be sufficiently obtained, and excellent impact resistance can be exhibited.
- the graft copolymer (C) is rubber-reinforced styrene obtained by polymerizing an aromatic vinyl-based monomer and a vinyl cyanide-based monomer in the presence of a rubbery polymer. Acrylonitrile-based resins are preferred.
- rubber polymers examples include diene rubbers such as polybutadiene, polyisoprene, butadiene/styrene copolymers, butadiene/acrylonitrile copolymers, ethylene/propylene copolymers, ethylene/propylene/nonconjugated diene copolymers, ethylene Olefin rubber such as butene-1 copolymer, ethylene/butene-1/non-conjugated diene copolymer; acrylic rubber; silicone rubber; polyurethane rubber; silicone/acrylic IPN rubber; natural rubber; block copolymers; hydrogenated conjugated diene-based block copolymers; and the like.
- diene rubbers such as polybutadiene, polyisoprene, butadiene/styrene copolymers, butadiene/acrylonitrile copolymers, ethylene/propylene copolymers, ethylene/propylene/nonconjugated diene cop
- the rubbery polymer used in the present invention is preferably a diene rubbery polymer such as a polybutadiene monomer or a butadiene/styrene copolymer.
- the volume average particle size of the rubbery polymer is preferably 50 to 3000 nm, more preferably 50 to 2000 nm. If the volume average particle size is less than the above lower limit, the impact resistance tends to be poor, and if it exceeds the above upper limit, the surface appearance of the molded product tends to be poor.
- a diene-based rubber-reinforced styrene acrylonitrile-based graft copolymer suitable for the present invention comprises at least an aromatic vinyl-based monomer and a vinyl cyanide-based monomer in the presence of the diene-based rubbery polymer. It is obtained by graft polymerizing the monomer mixture contained.
- the monomer mixture may contain other copolymerizable vinyl-based monomers in addition to the aromatic vinyl-based monomer and the vinyl cyanide-based monomer.
- a diene-based rubber-reinforced styrene acrylonitrile-based graft copolymer is a monomer containing an aromatic vinyl-based monomer and a vinyl cyanide-based monomer in the presence of 20 to 70 parts by mass of the diene-based rubbery polymer. It is preferably obtained by polymerizing 80 to 30 parts by mass of the mixture (provided that the total of the diene rubbery polymer and the monomer mixture is 100 parts by mass). More preferably, the ratio is 30 to 60 parts by mass of the diene rubbery polymer and 70 to 40 parts by mass of the monomer mixture.
- aromatic vinyl monomers used here include styrene, t-butylstyrene, ⁇ -methylstyrene, p-methylstyrene, hydroxystyrene, vinylxylene, monochlorostyrene, dichlorostyrene, monobromostyrene, di Bromstyrene, fluorostyrene, pt-butylstyrene, ethylstyrene, vinylnaphthalene, divinylbenzene, 1,1-diphenylstyrene, N,N-diethyl-p-aminoethylstyrene, N,N-diethyl-p-amino Ethylstyrene, vinylpyridine and the like can be mentioned. These can be used individually by 1 type or in combination of 2 or more types. Among these, styrene and ⁇ -methylstyrene are preferred, and styrene
- Vinyl cyanide-based monomers can be mentioned as vinyl cyanide-based monomers. These can be used individually by 1 type or in combination of 2 or more types. Chemical resistance is imparted by using a vinyl cyanide monomer.
- vinyl-based monomers copolymerizable with aromatic vinyl-based monomers and vinyl cyanide-based monomers include (meth)acrylic acid ester compounds, maleimide compounds, and other unsaturated compounds containing various functional groups. etc.
- various functional group-containing unsaturated compounds include unsaturated acid compounds, epoxy group-containing unsaturated compounds, hydroxyl group-containing unsaturated compounds, acid anhydride group-containing unsaturated compounds, oxazoline group-containing unsaturated compounds, substituted or unsubstituted and amino group-containing unsaturated compounds.
- These other vinyl monomers can be used singly or in combination of two or more.
- (Meth)acrylic acid ester compounds include methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, and the like. These can be used individually by 1 type or in combination of 2 or more types. Surface hardness is improved by using a (meth)acrylic acid ester compound.
- the amount of the (meth)acrylic acid ester compound used is usually 0 to 75% by mass as a proportion in the monomer mixture.
- Maleimide compounds include maleimide, N-phenylmaleimide, N-cyclohexylmaleimide, N-cyclohexylmaleimide and the like. These can be used individually by 1 type or in combination of 2 or more types. In order to introduce maleimide units, maleic anhydride may be copolymerized and then imidized. Heat resistance is imparted by using a maleimide compound. The maleimide compound is used in an amount of generally 0 to 30% by mass as a proportion of the total amount of the monomer mixture.
- unsaturated acid compounds include acrylic acid, methacrylic acid, ethacrylic acid, maleic acid, fumaric acid, itaconic acid, crotonic acid, and cinnamic acid. These can be used individually by 1 type or in combination of 2 or more types.
- epoxy group-containing unsaturated compounds examples include glycidyl acrylate, glycidyl methacrylate, and allyl glycidyl ether. These can be used individually by 1 type or in combination of 2 or more types.
- hydroxyl group-containing unsaturated compounds examples include 3-hydroxy-1-propene, 4-hydroxy-1-butene, cis-4-hydroxy-2-butene, trans-4-hydroxy-2-butene, 3-hydroxy-3- methyl-1-propene, 2-hydroxyethyl methacrylate, 2-hydroxyethyl acrylate, N-(4-hydroxyphenyl)maleimide and the like. These can be used individually by 1 type or in combination of 2 or more types.
- oxazoline group-containing unsaturated compounds examples include vinyloxazoline. These can be used individually by 1 type or in combination of 2 or more types.
- acid anhydride group-containing unsaturated compounds examples include maleic anhydride, itaconic anhydride, and citraconic anhydride. These can be used individually by 1 type or in combination of 2 or more types.
- substituted or unsubstituted amino group-containing unsaturated compounds include aminoethyl acrylate, propylaminoethyl acrylate, dimethylaminoethyl methacrylate, phenylaminoethyl methacrylate, N-vinyldiethylamine, N-acetylvinylamine, and acrylamine. , N-methylacrylamine, acrylamide, N-methylacrylamide, p-aminostyrene and the like. These can be used individually by 1 type or in combination of 2 or more types.
- the amount of other various functional group-containing unsaturated compounds used is usually the total amount of the functional group-containing unsaturated compounds relative to the total amount of the graft copolymer (C) and the vinyl copolymer (D). 0.1 to 20% by mass, preferably 0.1 to 10% by mass.
- the graft copolymer (C) such as a diene-based rubber-reinforced styrene-acrylonitrile-based graft copolymer is produced by known polymerization methods such as emulsion polymerization, bulk polymerization, solution polymerization, suspension polymerization, and polymerization methods in which these are combined. be able to.
- the rubber-like polymer obtained by emulsion polymerization can also be produced by emulsion polymerization in the production of the graft copolymer (C).
- the graft copolymer (C) is generally and preferably produced by bulk polymerization, solution polymerization or suspension polymerization.
- the graft copolymer (C) can be produced by emulsion polymerization by emulsifying the rubber-like polymer by a known method. Even a rubbery polymer produced by emulsion polymerization can be coagulated and isolated, and then the graft copolymer (C) can be produced by bulk polymerization, solution polymerization, or suspension polymerization.
- polymerization initiators When manufacturing by emulsion polymerization, polymerization initiators, chain transfer agents, emulsifiers, etc. are used. All of these known ones can be used.
- polymerization initiators examples include cumene hydroperoxide, p-menthane hydroperoxide, diisopropylbenzene hydroperoxide, tetramethylbutyl hydroperoxide, tert-butyl hydroperoxide, potassium persulfate, azobisisobutyronitrile and the like. mentioned.
- redox agents such as various reducing agents, sugar-containing iron pyrophosphate formulations, and sulfoxylate formulations.
- chain transfer agents examples include octylmercaptan, n-dodecylmercaptan, t-dodecylmercaptan, n-hexylmercaptan, and terpinolene.
- Emulsifiers include alkylbenzene sulfonates such as sodium dodecylbenzene sulfonate, aliphatic sulfonates such as sodium lauryl sulfate, higher fatty acid salts such as potassium laurate, potassium stearate, potassium oleate and potassium palmitate, and rosin acid. Rosinates such as potassium can be used.
- the method of using the rubbery polymer and the monomer mixture may be polymerization by adding the monomer mixture all at once in the presence of the total amount of the rubbery polymer, or polymerization by dividing or continuously adding. may Part of the rubbery polymer may be added during the polymerization.
- the resulting latex is usually coagulated with a coagulant. Thereafter, by washing with water and drying, a powder of graft copolymer (C) is obtained.
- a powder of graft copolymer (C) is obtained.
- two or more kinds of latexes of the graft copolymer (C) obtained by emulsion polymerization may be appropriately blended and then coagulated.
- the mixture may be coagulated.
- the coagulant inorganic salts such as calcium chloride, magnesium sulfate and magnesium chloride, and acids such as sulfuric acid, acetic acid, citric acid and malic acid can be used.
- a powder of the graft copolymer (C) can also be obtained by spray-drying the latex.
- the solvent that can be used when producing the graft copolymer (C) by solution polymerization is an inert polymerization solvent that is used in normal radical polymerization.
- examples thereof include aromatic hydrocarbons such as ethylbenzene and toluene, ketones such as methyl ethyl ketone and acetone, acetonitrile, dimethylformamide and N-methylpyrrolidone.
- the polymerization temperature is usually in the range of 80-140°C, preferably 85-120°C.
- a polymerization initiator may be used, or the polymerization may be carried out by thermal polymerization without using a polymerization initiator.
- organic peroxides such as ketone peroxide, dialkyl peroxide, diacyl peroxide, peroxyester, hydroperoxide, azobisisobutyronitrile, and benzoyl peroxide are preferably used.
- a chain transfer agent for example, mercaptans, terpinolene, ⁇ -methylstyrene dimer and the like can be used.
- the graft copolymer (C) is produced by bulk polymerization or suspension polymerization
- the polymerization initiator, chain transfer agent, etc. described in the solution polymerization can be used.
- the amount of monomers remaining in the graft copolymer (C) obtained by each of the above polymerization methods is usually 10,000 ppm or less, preferably 5,000 ppm or less.
- the graft copolymer (C) obtained by graft-polymerizing the monomer mixture in the presence of the rubber-like polymer contains a copolymer obtained by graft-copolymerizing the vinyl-based monomer of the monomer mixture to the rubber-like polymer. It includes a polymer and an ungrafted component ((co)polymer of a vinyl-based monomer) that is not grafted to the rubbery polymer.
- the graft ratio of the graft copolymer (C) such as a diene-based rubber-reinforced styrene-acrylonitrile-based graft copolymer is usually 10 to 150% by mass, preferably 20 to 130% by mass, more preferably 30 to 110% by mass, particularly Preferably, it is adjusted to 40 to 100% by mass. Grafting rate depends on type and amount of polymerization initiator used, type and amount of chain transfer agent used, polymerization method, contact time between vinyl monomer and rubbery polymer during polymerization, type of rubbery polymer, and polymerization temperature. It can be changed by various factors such as.
- T represents 1 g of diene rubber-reinforced styrene acrylonitrile graft copolymer in 20 ml of acetone, shaken with a shaker for 2 hours, and then centrifuged (rotation speed: 23,000 rpm) for 60 minutes. It is the mass (g) of the insoluble matter obtained by centrifuging to separate the insoluble matter and the soluble matter.
- S is the mass (g) of the diene-based rubbery polymer contained in 1 g of the diene-based rubber-reinforced styrene-acrylonitrile-based graft copolymer.
- the intrinsic viscosity [ ⁇ ] of the acetone-soluble portion of the graft copolymer (C) such as a diene-based rubber-reinforced styrene-acrylonitrile-based graft copolymer (measured at 30°C using methyl ethyl ketone as a solvent) is usually 0.15. ⁇ 1.2 dl/g, preferably 0.2 to 1.0 dl/g, more preferably 0.2 to 0.8 dl/g.
- the average particle size of the grafted rubbery polymer particles dispersed in the graft copolymer (C) such as a diene-based rubber-reinforced styrene-acrylonitrile-based graft copolymer is usually 50 to 3,000 nm, preferably 50 to 2,000 nm. 500 nm, particularly preferably 50 to 2,000 nm. If the rubber particle size is less than 50 nm, the impact resistance tends to be poor, and if it exceeds 3,000 nm, the surface appearance of the molded product tends to be poor.
- One of these graft copolymers (C) may be used alone, or two or more of them having different copolymer compositions and physical properties may be mixed and used.
- the vinyl copolymer (D) is obtained by copolymerizing at least an aromatic vinyl monomer and a vinyl cyanide monomer.
- the vinyl-based copolymer (D) may be obtained by further copolymerizing other vinyl-based monomers other than aromatic vinyl-based monomers and vinyl cyanide-based monomers.
- the aromatic vinyl-based monomer the vinyl cyanide-based monomer, and other vinyl-based monomers, all those described in the description of the graft copolymer (C) can be used.
- the vinyl-based monomer in the graft copolymer (C) and the vinyl-based monomer in the vinyl-based copolymer (D) may be the same or different.
- the total content of the vinyl-based monomers other than the aromatic vinyl-based monomer and the vinyl cyanide-based monomer used in the copolymerization of the vinyl-based copolymer (D) was 100% by mass. In that case, it is usually 75% by mass or less, preferably 50% by mass or less, and more preferably 25% by mass or less.
- Preferred vinyl-based copolymers (D) include styrene/acrylonitrile copolymers, styrene/acrylonitrile/methyl methacrylate copolymers, and copolymers of these with the functional group-containing unsaturated compounds.
- the vinyl-based copolymer (D) can be produced by emulsion polymerization, bulk polymerization, solution polymerization, suspension polymerization, or a combination thereof, which are known polymerization methods described in the production method of the graft copolymer (C). can be manufactured.
- the weight average molecular weight of the vinyl copolymer (D) is generally 40,000 to 300,000, preferably 60,000 to 200,000. If the weight average molecular weight of the vinyl copolymer (D) is within the above range, mechanical strength and moldability are further improved.
- the weight average molecular weight of the vinyl copolymer (D) is a value converted to standard polystyrene measured by gel permeation chromatography (GPC).
- the vinyl-based copolymer (D) may be used singly or in combination of two or more having different copolymer compositions and physical properties.
- thermoplastic resin composition of the present invention may contain inorganic fillers other than wollastonite (B) as long as the objects of the present invention are not impaired.
- inorganic fillers include inorganic compound powders such as talc, calcium carbonate, mica, kaolin, diatomaceous earth, silica, titania, and zeolite, and glass fibers. These may use only 1 type and may use 2 or more types.
- Other inorganic fillers may be surface-treated with a silane coupling agent, a titanate-based coupling agent, or the like.
- thermoplastic resin composition of the present invention in addition to the polycarbonate resin (A), the graft copolymer (C), and the vinyl copolymer (D), has a weight average molecular weight of 2,000,000 or more, which is different from these resins. of high molecular weight resin (E).
- high molecular weight resin (E) By containing the high-molecular-weight resin (E), it is possible to improve the appearance of the resulting molded product and the appearance of the coating.
- the weight-average molecular weight of the high-molecular-weight resin (E) is not particularly limited as long as it is 2,000,000 or more, but it is preferably a thermoplastic resin.
- a (co)polymer resin containing a structural unit derived from an acid alkyl ester compound (hereinafter referred to as "resin (E2)”), a (co)polymer resin of an ⁇ -olefin having 2 to 6 carbon atoms, a polycarbonate, and the like. be done.
- resin (E1) and resin (E2) are preferred.
- the weight average molecular weight of the high-molecular-weight resin (E) is preferably 2,500,000 or more, more preferably 3,000,000 or more. If the weight-average molecular weight of the high-molecular-weight resin (E) is excessively large, the thermoplastic resin composition of the present invention becomes uneven. is less than 5 million.
- the weight average molecular weight of the high molecular weight resin (E) can be measured by gel permeation chromatography (GPC) using standard polystyrene and dimethylformamide as a solvent.
- the aromatic vinyl-based monomers forming the resin (E1) include the aromatic vinyl-based monomers exemplified in the graft copolymer (C). Of these, styrene and ⁇ -methylstyrene are preferred.
- the resin (E1) may have structural units derived from polymerizable compounds other than aromatic vinyl monomers.
- vinyl cyanide-based monomers, (meth)acrylic acid ester compounds, maleimide-based compounds, acid anhydrides, and functional groups such as hydroxyl groups, amino groups, epoxy groups, amide groups, carboxyl groups, and oxazoline groups may have a structural unit derived from a vinyl-based monomer or the like having Other structural units may be contained singly or in combination of two or more.
- the other polymerizable compounds also include various vinyl-based monomers exemplified in the graft copolymer (C).
- Acrylonitrile is preferred as the vinyl cyanide monomer.
- the (meth)acrylate compound methyl methacrylate and n-butyl acrylate are preferred.
- Preferred maleimide compounds are N-phenylmaleimide and N-cyclohexylmaleimide.
- Maleic anhydride is preferred as the acid anhydride.
- 2-Hydroxyethyl methacrylate is preferred as the hydroxyl group-containing vinyl compound.
- Glycidyl methacrylate is preferred as the epoxy group-containing vinyl compound.
- Acrylamide is preferable as the amide group-containing vinyl compound.
- styrene copolymer containing an aromatic vinyl monomer unit and a vinyl cyanide monomer unit is used.
- This styrenic copolymer may be a binary copolymer, or may be a terpolymer, a quaternary copolymer, or the like further containing other structural units.
- the resin (E1) has the following composition, it is possible to obtain a molded product that has a good balance between good molded product appearance and heat resistance without deteriorating moldability.
- the aromatic vinyl-based monomer unit and the vinyl cyanide-based monomer are preferably 50 to 95% by mass and 5 to 50% by mass, more preferably 60 to 90% by mass and 10 to 40% by mass, respectively, when the total of both is 100% by mass. , and more preferably 70 to 80% by mass and 20 to 30% by mass. If the content of the vinyl cyanide-based monomer unit is too high, the heat resistance of the obtained molded article may be lowered, and the molded article may be colored.
- the upper limit of the amount of the polymerizable compound that forms the other structural unit is preferably 50% by mass, more preferably 25% by mass, based on 100% by mass of all vinyl-based monomers including aromatic vinyl-based monomers and vinyl cyanide-based monomers. If the amount used exceeds 50% by mass, the processability of the thermoplastic resin composition tends to deteriorate.
- the resin (E1) is composed of aromatic vinyl-based monomer units, vinyl cyanide-based monomer units, and other structural units, the total of these structural units is preferably is 55 to 90% by weight, 5 to 40% by weight and 0 to 25% by weight.
- the resin (E2) is a (co)polymer containing a (meth)acrylic acid alkyl ester compound unit in which the alkyl group has 1 to 4 carbon atoms, preferably polymethyl methacrylate.
- the resins (E1) and (E2) can be produced in the same manner as the above-described graft copolymer (C) and vinyl copolymer (D).
- thermoplastic resin composition of the present invention only one type of ultrahigh molecular weight resin (E) may be used, or two or more types having different resin types and physical properties may be blended.
- thermoplastic resin composition of the present invention may contain a Teflon resin (F) in addition to the polycarbonate resin (A), the graft copolymer (C) and the vinyl copolymer (D).
- Teflon resin (F) By containing the Teflon-based resin (F), the appearance of the molded article obtained and the appearance of the coating can be improved.
- the Teflon-based resin (F) may be homo-PTFE consisting only of tetrafluoroethylene (TFE) units, or modified PTFE containing modified monomer units based on modified monomers copolymerizable with TFE units and TFE. good too.
- acrylic-modified PTFE may be used as the PTFE.
- acrylic-modified PTFE include a resin obtained by dispersing PTFE and an acrylic resin in the same dispersion medium and drying and solidifying the solid content. The use of acrylic-modified PTFE makes it easier to uniformly disperse PTFE in the resin composition.
- thermoplastic resin composition of the present invention only one type of Teflon-based resin (F) may be used, or two or more types having different resin types and physical properties may be blended.
- the polycarbonate resin (A), the inorganic filler containing the wollastonite (B), the graft copolymer (C), and the vinyl copolymer (D) total 100 parts by mass.
- the content of the resin (A) is 45 to 65 parts by mass
- the content of the inorganic filler containing wollastonite (B) is 15 to 40 parts by mass
- the content of the graft copolymer (C) is 7 to 20 parts by mass.
- the content of the vinyl copolymer (D) is preferably 0 to 20 parts by mass.
- the content of the polycarbonate resin (A) is at least the above lower limit, high impact resistance and high heat resistance can be exhibited, and if it is at most the above upper limit, deterioration of moldability can be prevented.
- the content of the inorganic filler containing wollastonite (B) is at least the above lower limit, effects such as high rigidity and low linear thermal expansion coefficient due to the inclusion of the inorganic filler can be sufficiently obtained. It is possible to prevent deterioration of moldability and decrease of impact resistance.
- an inorganic filler other than wollastonite (B) is contained as an inorganic filler, the use of wollastonite (B) treated with a specific silane coupling agent is effective in obtaining the effects of the present invention more effectively.
- the ratio of wollastonite (B) treated with a specific silane coupling agent in 100% by mass of the inorganic filler is preferably 40% by mass or more, more preferably 60 to 100% by mass, and 100% by mass % is most preferred.
- the content of the graft copolymer (C) is at least the above lower limit, excellent impact resistance can be exhibited, and if it is at most the above upper limit, deterioration of moldability and molding appearance can be prevented.
- the content of the vinyl copolymer (D) is equal to or less than the above upper limit, it is possible to prevent deterioration of impact resistance and heat resistance.
- thermoplastic resin composition of the present invention further contains an ultrahigh molecular weight resin (E) or a Teflon resin (F)
- the content of the ultrahigh molecular weight resin (E) or the Teflon resin (F) is the polycarbonate resin ( A), an inorganic filler containing wollastonite (B), a graft copolymer (C), and a vinyl copolymer (D), preferably 0.1 to 10 parts by mass, more preferably 100 parts by mass in total. is 0.3 to 8 parts by mass, more preferably 0.5 to 5 parts by mass.
- the content of the ultra-high molecular weight resin (E) or Teflon-based resin (F) is at least the above lower limit, appearance of the molded product and coating appearance by blending the ultra-high-molecular weight resin (E) or Teflon-based resin (F) It is possible to sufficiently obtain the improvement effect of When the content of the ultra-high molecular weight resin (E) or the Teflon-based resin (F) is equal to or less than the above upper limit, it is possible to prevent deterioration of moldability due to excessive blending of the ultra-high molecular weight resin (E).
- the thermoplastic resin composition of the present invention comprises a polycarbonate resin (A), a graft copolymer (C), a vinyl copolymer (D) and an ultra-high molecular weight resin (E) blended as necessary, a Teflon-based
- the content of the rubbery polymer derived from the graft copolymer (C) is 3.5 parts per 100 parts by mass of the resin component corresponding to the sum of the resin (F) and other resins described later. ⁇ 20 parts by weight, preferably 5 to 15 parts by weight.
- the content of the rubbery polymer with respect to 100 parts by weight of the resin component is at least the above lower limit, excellent impact resistance can be exhibited even in a notched impact test, and if it is below the above upper limit, good moldability can be obtained. .
- the thermoplastic resin composition of the present invention may contain a heat antioxidant.
- a heat aging inhibitor phenol-based, phosphorus-based, sulfur-based, etc. can be mentioned, and a mixed system selected from these three is preferable. When such a mixed system is used as a heat aging inhibitor, the effect of retaining the tensile elongation when exposed to high temperatures for a long period of time can be obtained.
- phenolic compounds include 2,6-di-t-butylphenol derivatives, 2-methyl-6-t-butylphenol derivatives, octadecyl 3(3,5-di-t-butyl-4-hydroxy phenyl)propionate, 4,4′-butylidene-bis(6-t-butyl-m-cresol), pentaerythrityl tetrakis[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate] , 2[1-(2hydroxy-3,5-di-t-pentylphenyl)-ethyl]-4,6-di-t-pentylphenyl acrylate, 2-t-butyl-6(3-t-butyl- 2-hydroxy-5-methylbenzyl)-4-methylphenyl acrylate and the like.
- Phosphorus includes tris(2,4-di-t-butylphenyl)phosphite, cyclic neopentanetetraylbis(2,4-di-t-butylphenylphosphite), distearylpentaerythritol diphosphite , sodium dihydrogen phosphate, disodium monohydrogen phosphate, and the like.
- the content of the heat antioxidant in the thermoplastic resin composition of the present invention is usually 0-5% by mass, preferably 0-3% by mass.
- the graft copolymer (C) and the vinyl copolymer (D) other than the polycarbonate resin (A) have improved heat aging properties by adding a heat aging inhibitor.
- the thermal anti-aging agent may act as a catalyst to promote hydrolysis, and deterioration tends to be suppressed when no thermal anti-aging agent is added. In view of these conflicting effects, if the above heat aging inhibitor is added with an upper limit of 5% by mass, the optimum heat aging prevention effect can be obtained.
- the thermoplastic resin composition of the present invention may contain known additives such as weather resistant agents, lubricants, colorants, flame retardants, flame retardant aids, antistatic agents and silicone oils.
- weather resistant agents such as weather resistant agents, lubricants, colorants, flame retardants, flame retardant aids, antistatic agents and silicone oils.
- benzotriazole-based, triazine-based, benzophenone-based, and the like are preferable as the weather resistant agent.
- an ester-based lubricant such as hardened castor oil is preferred.
- coloring agents include carbon black and red iron oxide.
- antistatic agents include polyethers and sulfonates having alkyl groups.
- thermoplastic resin composition of the present invention contains, for example, a polycarbonate resin (A), a graft copolymer (C), a vinyl copolymer (D) and other Other thermoplastic resins other than these resins can be blended in the range of 20 parts by mass or less in 100 parts by mass in total with the resin.
- Thermoplastic resins that can be blended in the thermoplastic resin composition of the present invention include polyolefin resins, vinyl chloride resins, acrylic resins, polyester resins, polyamide resins, polyacetal resins, polyphenylene ether resins, and polyarylene. sulfide-based resins, and the like. These thermoplastic resins can be used singly or in combination of two or more.
- thermoplastic resin composition of the present invention can be produced by kneading each component using various extruders, Banbury mixers, kneaders, rolls, and the like.
- polycarbonate resin (A), wollastonite (B), graft copolymer (C), vinyl copolymer (D) and optionally used ultrahigh molecular weight resin (E) or Teflon resin ( F) and other additives can be kneaded to obtain pellets of the thermoplastic resin composition of the present invention.
- the polycarbonate resin (A), wollastonite (B), graft copolymer (C), vinyl copolymer (D) and other additives used as necessary are processed by a twin-screw extruder. and the like.
- the wollastonite (B) is preferably added by side feeding in order to efficiently develop a high rigidity and a low coefficient of linear thermal expansion.
- the heating temperature during this melt-kneading is appropriately selected depending on the composition of the thermoplastic resin composition, but is usually 230 to 300°C.
- the molded article of the present invention is obtained by molding the thermoplastic resin composition of the present invention.
- thermoplastic resin composition of the present invention examples include injection molding (including insert molding of films, glass plates, etc.), injection foam molding, injection compression molding, extrusion, and blow molding. , a vacuum forming method, a pressure forming method, a calendar forming method, an inflation forming method, and the like.
- injection molding method, the injection foam molding method, and the injection compression molding method are preferable because they are excellent in mass productivity and can obtain a molded product with high dimensional accuracy.
- the molded article of the present invention made of the thermoplastic resin composition of the present invention is excellent in rigidity, impact resistance, and heat resistance, has a low coefficient of linear thermal expansion, and can also have good molded appearance and painted appearance. can. Therefore, the molded article of the present invention can be used both as an uncoated molded article and as a coated molded article.
- the molded article of the present invention includes, for example, personal computers (including notebook and tablet types), projectors (including liquid crystal projectors), televisions, printers, facsimiles, copiers, audio equipment, game machines, cameras (video (including cameras, digital cameras, etc.), video equipment (video, etc.), musical instruments, mobile devices (electronic notebooks, personal digital assistants (PDA), etc.), lighting equipment, communication equipment (telephones (including mobile phones, smartphones) etc.), fishing gear, playground equipment (pachinko goods, etc.), vehicle products, furniture products, sanitary products, building material products, and the like.
- PDA personal digital assistants
- the effect of the present invention is particularly exhibited, and therefore, it is suitable as vehicle exterior parts for automobiles and the like.
- thermoplastic resin compositions In the following examples and comparative examples, resin components produced by the following method and the following commercially available products were used as raw materials for the thermoplastic resin compositions.
- PC-1 Mitsubishi Engineering-Plastics Co., Ltd. aromatic polycarbonate resin "Novarex 7022PJ” (viscosity average molecular weight: 21,000)
- PC-2 Mitsubishi Engineering-Plastics Co., Ltd. aromatic polycarbonate resin "Novarex 7022PJ-LH1" (viscosity average molecular weight: 19,000)
- Wollastonite As wollastonite, "NYGLOS 4W” manufactured by IMERYS Wollastonite Co., Ltd. having an average length of 63 ⁇ m and an average diameter of 7 ⁇ m was used after being surface-treated with various silane coupling agents. Table 1 below shows untreated wollastonite-1 and surface-treated wollastonite-2 to -4. Wollastonite-4 corresponds to Wollastonite (B) according to the present invention.
- raw material particles L1 diene polymer particles
- Laser Doppler/frequency analysis was performed using Nikkiso's "Microtrac UPA150 Particle Size Analyzer” to measure the volume average particle size of the raw material particles L1.
- the volume average particle size of the raw material particles L1 was 300 nm.
- ABS resin had a polymerization conversion rate of 94%, a graft rate of 51%, and a weight average molecular weight of 80,000 of the acetone-soluble matter.
- AS resin styrene/acrylonitrile copolymer
- AS-2 styrene/acrylonitrile copolymer
- 75 parts of styrene, 25 parts of acrylonitrile and 20 parts of toluene were continuously added to the reactor.
- a solution of 0.4 parts of tert-dodecylmercaptan and 5 parts of toluene as a molecular weight modifier, and a solution of 0.1 part of 1,1′-azobis(cyclohexane-1-carbonitrile) and 5 parts of toluene as a polymerization initiator. was continuously supplied. Polymerization was carried out by controlling the temperature at 110°C.
- the obtained copolymer solution was directly devolatilized by using a twin-screw three-stage vented extruder to devolatilize unreacted monomers and solvent, and had a weight average molecular weight of 80, 000 of AS resin (A-2) was obtained.
- E Ultrahigh molecular weight resin
- E-1 High molecular weight acrylic resin manufactured by Mitsubishi Chemical Corporation "Metabrene (registered trademark) P-531A" (weight average molecular weight: 4.5 million)
- E-2 General Electric Specialty Chemicals high molecular weight acrylonitrile/styrene copolymer "Blendex 869" (weight average molecular weight: 3.8 million)
- Teflon resin (F) The following commercially available products were used as the Teflon-based resin (F).
- F Mitsubishi Chemical Corporation acrylic-modified Teflon polymer "Metabrene (registered trademark) A-3000"
- Talc-1 Talc with an average particle size of 4.75 ⁇ m (manufactured by Hayashi Kasei Co., Ltd.: Upn HS-T0.5)
- Talc-2 Talc with an average particle size of 4.5 ⁇ m (manufactured by Nippon Talc Co., Ltd.: Micro Ace P-4) treated with 3-glycidoxypropyltriethoxysilane
- GF-1 Average fiber length 40 ⁇ m, average fiber Glass fiber with a diameter of 11 ⁇ m (manufactured by Nittobo: PF 40E-001)
- GF-2 Epoxysilane-treated glass fiber with an average fiber length of 3 mm and an average fiber diameter of 13 ⁇ m (CS 3PE 937S manufactured by Nittobo Co., Ltd.)
- Examples 1 to 12, Comparative Examples 1 to 9 Of the raw materials shown in Tables 2 and 3, the raw materials excluding the inorganic filler were blended at the ratios shown in Tables 2 and 3, blended in a Henschel mixer, and then a vented twin-screw extruder TEM26SS manufactured by Shibaura Kikai Co., Ltd. was used to extrude at 260°C. The amount of the inorganic filler added was controlled by a weight feeder so that the proportions shown in Tables 2 and 3 were obtained, and the mixture was added by side feeding to obtain pellets of the thermoplastic resin composition. The obtained resin pellets were dried at 120° C. for about 5 hours to reduce the moisture content in the pellets to 200 ppm or less.
- an injection molding machine manufactured by Shibaura Machine Co., Ltd.: IS-100GN
- a dumbbell shape ISO3167: test piece A type
- an injection molding machine manufactured by Shibaura Kikai Co., Ltd.: EC130SX
- a cylinder temperature of 260 ° C. a mold temperature of 80 ° C.
- a molding cycle of 50 seconds a molding cycle of 50 seconds
- an injection speed of 50 mm / sec Plate specimens of 150 x 150 x 3 mm were continuously injection molded.
- the test piece was left for 24 hours in an environment of a temperature of 23° C. and a relative humidity of 50%.
- Tables 2 and 3 also show the rubbery polymer content derived from the ABS resin in 100 parts of the resin component.
- Charpy impact strength was measured according to ISO 179-1:2013 edition. This value is preferably 20 kJ/m 2 or more.
- the flexural modulus was measured according to ISO 178:2013 edition.
- the flexural modulus is an index of the stiffness of a molded article. This value is preferably 4000 MPa or more.
- ⁇ Appearance of molded product> The appearance of the obtained plate test piece was visually observed and evaluated according to the following evaluation criteria.
- ⁇ Paint appearance> The obtained plate test piece was coated according to the following procedure, and the coating appearance on the surface was visually observed and evaluated according to the following criteria.
- a paint for painting consisting of 80 parts by mass of urethane-based paint base agent, 40 parts of synthetic resin paint thinner and 20 parts of curing agent is sprayed (paint thickness: 20 to 30 ⁇ m). and left at 23° C. for 5 minutes.
- ⁇ Evaluation criteria for coating appearance> ⁇ : Good with no coating unevenness. x: There is coating unevenness.
- the deflection temperature was measured by the flatwise method under a load of 1.80 MPa according to ISO 75-2: 2013 edition. This value is preferably 100° C. or higher.
- MVR Melt volume rate
- Comparative Example 1 containing no inorganic filler has high impact resistance, but low rigidity and a large coefficient of linear thermal expansion.
- Comparative Example 2 using untreated wollastonite and Comparative Examples 3 and 4 using wollastonite treated with other treatment agents the rigidity was improved and the coefficient of linear thermal expansion was reduced, but impact resistance was reduced. sex is markedly reduced.
- Comparative Examples 5 to 9 using talc and glass fibers other than wollastonite also show a large decrease in impact resistance.
- Comparative Example 1 containing no inorganic filler is excellent in molded appearance and painted appearance, but Comparative Examples 2 to 9 are all inferior in molded appearance and painted appearance.
- Examples 1 to 12 in which wollastonite treated with hexadecylsilane was used, deterioration in impact resistance was suppressed, rigidity was increased, and linear thermal expansion coefficient was also reduced.
- Examples 1, 3 to 5, and 8 to 12 in which the ultra-high molecular weight resin (E) or the Teflon resin (F) was blended, the molded appearance and the painted appearance are good.
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Abstract
Description
従来技術では、無機フィラーの配合で剛性を高めることができるが、より剛性を高めるべく無機フィラーの配合量を多くすると、耐衝撃性が極端に低下する。また、成形外観、塗装外観も損なわれる。
本発明は以下を要旨とする。
本発明の熱可塑性樹脂組成物は、ポリカーボネート(A)、およびワラストナイト(B)を含有してなる熱可塑性樹脂組成物において、ワラストナイト(B)が炭素数12以上の直鎖アルキル基を含むシランカップリング剤で処理されていることを特徴とする。
本発明の熱可塑性樹脂組成物は、さらにグラフト共重合体(C)、ビニル系共重合体(D)、超高分子量樹脂(E)又はテフロン系樹脂(F)、ワラストナイト(B)以外の無機フィラーを含んでいてもよい。
ポリカーボネート樹脂(A)は、ジヒドロキシアリール化合物等のジヒドロキシ化合物とホスゲンとの界面重縮合法、ジヒドロキシアリール化合物等のジヒドロキシ化合物とジフェニルカーボネート等のカーボネート化合物とのエステル交換反応(溶融重縮合)によって得られるもの等、公知の重合法によって得られるものが全て使用できる。
耐衝撃性等の機械的強度の観点から、ポリカーボネート樹脂(A)としては芳香族ポリカーボネート樹脂(A)が好ましい。
粘度平均分子量=(〔η〕×8130)1.205
ここで、〔η〕=〔(ηsp×1.12+1)1/2-1〕/0.56Cである。Cは濃度を示す。
ワラストナイト(B)に用いる未処理ワラストナイトとしては特に制限はなく、一般的に工業的に使用されているものをいずれも用いることができる。
これらの効果の観点からシランカップリング剤に含まれるアルキル基の炭素数は特に12~20であることが好ましい。
これらのシランカップリング剤は1種のみを用いてもよく、2種以上を混合して用いてもよい。
グラフト共重合体(C)としては、高耐衝撃性の観点から、ゴム質重合体の存在下に、芳香族ビニル系単量体とシアン化ビニル系単量体を重合してなるゴム強化スチレンアクリロニトリル系樹脂が好ましい。
グラフト率(質量%)={(T-S)/S}×100
上記式中、Tはジエン系ゴム強化スチレンアクリロニトリル系グラフト共重合体1gをアセトン20mlに投入し、振とう機により2時間振とうした後、遠心分離機(回転数;23,000rpm)で60分間遠心分離し、不溶分と可溶分とを分離して得られる不溶分の質量(g)である。Sはジエン系ゴム強化スチレンアクリロニトリル系グラフト共重合体1gに含まれるジエン系ゴム質重合体の質量(g)である。
ビニル系共重合体(D)は、少なくとも芳香族ビニル系単量体とシアン化ビニル系単量体を共重合してなるものである。ビニル系共重合体(D)は、芳香族ビニル系単量体およびシアン化ビニル系単量体以外のこれらと共重合可能なその他のビニル系がさらに共重合されたものであってもよい。
グラフト共重合体(C)中のビニル系単量体とビニル系共重合体(D)中のビニル系単量体とは同一であってもよく、異なるものであってもよい。
ビニル系共重合体(D)の重量平均分子量は、ゲル浸透クロマトグラフィー(GPC)により測定された標準ポリスチレン換算の値である。
本発明の熱可塑性樹脂組成物は、本発明の目的を損なわない範囲において、ワラストナイト(B)以外のその他の無機フィラーを含んでいてもよい。
その他の無機フィラーは、シランカップリング剤やチタネート系カップリング剤等で表面処理されたものであってもよい。
本発明の熱可塑性樹脂組成物は、ポリカーボネート樹脂(A)、グラフト共重合体(C)、ビニル系共重合体(D)に加えて、これらの樹脂とは異なる、重量平均分子量が200万以上の高分子量樹脂(E)を含有してもよい。高分子量樹脂(E)を含有することで、得られる成形品の外観及び塗装外観を良好なものとすることができる。
シアン化ビニル系単量体としては、アクリロニトリルが好ましい。
(メタ)アクリル酸エステル化合物としては、メタクリル酸メチル及びアクリル酸n-ブチルが好ましい。
マレイミド系化合物としては、N-フェニルマレイミド及びN-シクロヘキシルマレイミドが好ましい。
酸無水物としては、無水マレイン酸が好ましい。
ヒドロキシル基含有ビニル系化合物としては、2-ヒドロキシエチルメタクリレートが好ましい。
エポキシ基含有ビニル系化合物としては、グリシジルメタクリレート好ましい。
アミド基含有ビニル系化合物としては、アクリルアミドが好ましい。
樹脂(E1)が、芳香族ビニル系単量体単位、シアン化ビニル系単量体単位、及び他の構造単位からなる場合、これらの構造単位の合計を100質量%に対して、それぞれ、好ましくは55~90質量%、5~40質量%及び0~25質量%である。
本発明の熱可塑性樹脂組成物は、ポリカーボネート樹脂(A)、グラフト共重合体(C)、ビニル系共重合体(D)に加えて、テフロン系樹脂(F)を含有してもよい。テフロン系樹脂(F)を含有することで得られる成形品の外観及び塗装外観を良好なものとすることができる。
本発明の熱可塑性樹脂組成物において、ポリカーボネート樹脂(A)、ワラストナイト(B)を含む無機フィラー、グラフト共重合体(C)、ビニル系共重合体(D)の合計100質量部に対するポリカーボネート樹脂(A)の含有量は45~65質量部、ワラストナイト(B)を含む無機フィラーの含有量は15~40質量部、グラフト共重合体(C)の含有量は7~20質量部、ビニル系共重合体(D)の含有量は0~20質量部であることが好ましい。
無機フィラーとしてワラストナイト(B)以外の他の無機フィラーを含む場合、特定のシランカップリング剤で処理されたワラストナイト(B)を用いることによる本発明の効果をより有効に得る上で、無機フィラー100質量%中の特定のシランカップリング剤で処理されたワラストナイト(B)の割合は40質量%以上であることが好ましく、より好ましくは60~100質量%であり、100質量%であることが最も好ましい。
ビニル系共重合体(D)の含有量が上記上限以下であれば耐衝撃性と耐熱性の低下を防ぐことができる。
<熱老化防止剤>
本発明の熱可塑性樹脂組成物には、熱老化防止剤を配合することができる。熱老化防止剤としては、フェノール系、リン系、硫黄系などが挙げられ、これら3種から選ばれる混合系が好ましい。熱老化防止剤として、このような混合系を用いると、長時間、高温下に曝された時の、引張り伸び率を保持するという効果が得られる。
本発明の熱可塑性樹脂組成物には、公知の耐候剤、滑剤、着色剤、難燃剤、難燃助剤、帯電防止剤、シリコーンオイルなどの添加剤を配合することができる。このうち、耐候剤としては、ベンゾトリアゾール系、トリアジン系、ベンゾフェノン系などが好ましい。滑剤としては、硬化ヒマシ油などのエステル系滑剤が好ましい。着色剤としては、カーボンブラック、ベンガラなどが挙げられる。帯電防止剤としては、ポリエーテル、アルキル基を有するスルホン酸塩などが挙げられる。
本発明の熱可塑性樹脂組成物には、本発明の目的とする性能を損なわない範囲で、例えばポリカーボネート樹脂(A)、グラフト共重合体(C)、ビニル系共重合体(D)と他の樹脂との合計100質量部中に20質量部以下の範囲で、これらの樹脂以外の他の熱可塑性樹脂を配合することができる。本発明の熱可塑性樹脂組成物に配合し得る熱可塑性樹脂としては、ポリオレフィン系樹脂、塩化ビニル系樹脂、アクリル系樹脂、ポリエステル系樹脂、ポリアミド系樹脂、ポリアセタール系樹脂、ポリフェニレンエーテル系樹脂、ポリアリーレンスルフィド系樹脂等が挙げられる。これらの熱可塑性樹脂は1種を単独で又は2種以上を組み合わせて使用することができる。
本発明の熱可塑性樹脂組成物は、各種押出機、バンバリーミキサー、ニーダー、ロールなどを用いて各成分を混練することで製造することができる。
例えば、ポリカーボネート樹脂(A)、ワラストナイト(B)、グラフト共重合体(C)、ビニル系共重合体(D)及び必要に応じて用いられる超高分子量樹脂(E)又はテフロン系樹脂(F)、その他の添加剤を混練することにより本発明の熱可塑性樹脂組成物のペレットを得ることができる。具体的には、2軸押出機によってポリカーボネート樹脂(A)、ワラストナイト(B)、グラフト共重合体(C)、ビニル系共重合体(D)及び必要に応じて用いられるその他の添加剤を溶融させる方法などが挙げられる。この溶融混練の際、高剛性、低線熱膨張係数を効率的に発現するためにワラストナイト(B)はサイドフィードにより添加されるのが好ましい。この溶融混練の際の加熱温度は、熱可塑性樹脂組成物の配合によって適宜選択されるが、通常230~300℃である。
本発明の成形品は、本発明の熱可塑性樹脂組成物を成形してなるものである。
以下において、「部」は「質量部」、「%」は「質量%」を意味する。
以下の実施例及び比較例において、熱可塑性樹脂組成物の原材料は、以下の方法により製造した樹脂成分及び以下の市販品を用いた。
PC-1:三菱エンジニアリングプラスチックス社製 芳香族ポリカーボネート樹脂「ノバレックス 7022PJ」(粘度平均分子量:21,000)
PC-2:三菱エンジニアリングプラスチックス社製 芳香族ポリカーボネート樹脂「ノバレックス 7022PJ-LH1」(粘度平均分子量:19,000)
ワラストナイトは平均長さ63μm、平均径7μmのIMERYS Wollastonite社製「NYGLOS 4W」を各種シランカップリング剤で表面処理して用いた。下記表1に、未処理ワラストナイト-1と表面処理ワラストナイト-2~4を示す。ワラストナイト-4が本発明に係るワラストナイト(B)に該当する。
<ABS樹脂(ブタジエン系ゴム質重合体/スチレン/アクリロニトリル共重合体)(ABS)の製造>
撹拌装置、加熱冷却装置、温度計及び各原料添加装置を備えたステンレス鋼製オートクレーブに、イオン交換水80部、1,3-ブタジエン100部、tert-ドデシルメルカプタン0.5部、ロジン酸カリウム1.8部、炭酸ナトリウム0.8部、水酸化カリウム0.075部及び過硫酸カリウム0.15部を仕込み、80℃で24時間反応させ、ジエン系重合体粒子(以下、「原料粒子L1」という)の水分散体(ラテックス)を得た。
日機装社製「マイクロトラックUPA150粒度分析計」を用いてレーザードップラー/周波数解析を行い、原料粒子L1の体積平均粒子径を測定した結果、原料粒子L1の体積平均粒子径は300nmであった。
ABS樹脂(ABS)の重合転化率は94%であり、グラフト率は51%、アセトン可溶分の重量平均分子量は80,000であった。
<AS樹脂(スチレン/アクリロニトリル共重合体)(AS-1)の製造>
リボン翼を備えたステンレス製オートクレーブを窒素置換した後、反応容器にスチレン75部、アクリロニトリル25部、トルエン20部を連続的に添加した。分子量調節剤としてtert-ドデシルメルカプタン0.16部及びトルエン5部の溶液、及び重合開始剤として、1,1’-アゾビス(シクロヘキサン-1-カーボニトリル)0.1部、及びトルエン5部の溶液を連続的に供給した。温度は110℃にコントロールして重合を行った。重合転化率が75%に到達した後、得られた共重合溶液は、2軸3段ベント付き押出機を使用して、直接未反応単量体と溶剤を脱揮し、重量平均分子量135,000のAS樹脂(AS-1)を得た。
リボン翼を備えたステンレス製オートクレーブを、窒素置換した後、反応容器にスチレン75部、アクリロニトリル25部、トルエン20部を連続的に添加した。分子量調節剤としてtert-ドデシルメルカプタン0.4部及びトルエン5部の溶液、及び重合開始剤として、1,1’-アゾビス(シクロヘキサン-1-カーボニトリル)0.1部、及びトルエン5部の溶液を連続的に供給した。温度は、110℃にコントロールして重合を行った。重合転化率が75%に到達した後、得られた共重合溶液は、2軸3段ベント付き押出機を使用して、直接未反応単量体と溶剤を脱揮し、重量平均分子量80,000のAS樹脂(A-2)を得た。
超高分子量樹脂(E)としては以下の市販品を用いた。
E-1:三菱ケミカル社製高分子量アクリル系樹脂「メタブレン(登録商標)P-531A」(重量平均分子量:450万)
E-2:General Electric Specialty Chemicals社製高分子量アクリロニトリル・スチレン共重合体「Blendex 869」(重量平均分子量:380万)
テフロン系樹脂(F)としては以下の市販品を用いた。
F:三菱ケミカル社製アクリル変性テフロン重合体「メタブレン(登録商標)A-3000」
タルク-1:平均粒子径が4.75μmのタルク(林化成社製:Upn HS-T0.5)
タルク-2:平均粒子径が4.5μmのタルク(日本タルク社製:ミクロエース P-4)を3-グリシドキシプロピルトリエトキシシランで処理したタルク
GF-1:平均繊維長40μm、平均繊維径11μmのガラス繊維(日東紡社製:PF 40E-001)
GF-2:平均繊維長3mm、平均繊維径13μmのエポキシシラン処理ガラス繊維(日東紡社製 CS 3PE 937S)
表2,3に示す原材料のうち無機フィラーを除いた原材料を表2,3に示す割合で配合し、これらをヘンシエルミキサーにてブレンドした後、芝浦機械社製のベント式二軸押出機TEM26SSを用いて、260℃にて押し出した。無機フィラーは表2,3に示す割合となるように重量フィーダーで添加量を制御し、サイドフィードにより添加し、熱可塑性樹脂組成物のペレットを得た。得られた樹脂ペレットを120℃にて約5時間乾燥させペレット中の水分率を200ppm以下にした。その後、射出成形機(芝浦機械社製:IS-100GN)によりシリンダー温度260℃、金型温度70℃、成形サイクル50秒、射出速度40mm/secの条件で、ダンベル形状(ISO3167:試験片A形)の試験片を連続的に射出成形した。また成形外観評価、塗装外観評価用試験片として、射出成形機(芝浦機械社製:EC130SX)によりシリンダー温度260℃、金型温度80℃、成形サイクル50秒、射出速度50mm/secの条件で、150×150×3mmのプレート試験片を連続的に射出成形した。該試験片を温度23℃、相対湿度50%の環境下で24時間放置したものを試験片とし、以下の評価を行い、結果を表2,3に示した。
表2,3には、樹脂成分100部中のABS樹脂由来のゴム質重合体含有量を併記した。
ISO 179-1:2013年度版に準じ、シャルピー衝撃強度を測定した。この値は20kJ/m2以上が好ましい。
ISO 178:2013年度版に準じ、曲げ弾性率を測定した。曲げ弾性率は成形品の剛性の指標である。この値は4000MPa以上が好ましい。
ダンベル試験片の中央より、樹脂の流れ方向(MD方向)に10mm長となるよう切断し、測定サンプルとした。日立ハイテクサイエンス社製TMA SS7100装置を用いて、圧縮モードで荷重5g、窒素雰囲気下、室温から100℃まで5℃/min.で昇温した後、25℃まで5℃/min.で降温し、再び25℃から100℃まで5℃/min.で昇温した。この際、2度目の昇温時における30℃~70℃の間の平均の線熱膨張率を測定した。この値は5×10-5/K以下が好ましい。
得られたプレート試験片の外観を目視観察し、以下の評価基準で評価した。
○:表面が滑らかで欠陥がない。
×:表面に異物感やフローマークなどの欠陥がある。
得られたプレート試験片へ以下の手順で塗装を行いその表面における塗装外観を目視観察し、以下の基準で評価した。
(1)塗装
プレート試験片の表面に、ウレタン系塗料主剤80質量部、合成樹脂塗料用シンナー40部及び硬化剤20部からなる塗装用塗料の吹き付け塗装(塗膜厚さ:20~30μm)を行い、23℃で5分間放置した。
(2)乾燥
その後、80℃で、30分間乾燥し、塗装試験片を得た。
<塗装外観の評価基準>
○:塗装ムラがなく良好。
×:塗装ムラがある。
ISO 75-2:2013年度版に準じ、1.80MPa荷重フラットワイズ法での撓み温度を測定した。この値は100℃以上が好ましい。
ISO 1133規格に従い、260℃-98Nの条件でペレットのMVRを測定した。MVRは熱可塑性樹脂組成物の成形性の目安となる。
無機フィラーを配合していない比較例1は、耐衝撃性は大きいが、剛性が低く、線熱膨張係数も大きい。
未処理ワラストナイトを用いた比較例2、他の処理剤で処理されたワラストナイトを用いた比較例3,4では、剛性が向上し、線熱膨張係数も低減されたが、耐衝撃性が著しく低下している。ワラストナイト以外のタルクやガラス繊維を用いた比較例5~9でも耐衝撃性の低下が大きい。
無機フィラーを配合していない比較例1は、成形外観、塗装外観に優れるが、比較例2~9はいずれも成形外観、塗装外観が劣る。
特に、超高分子量樹脂(E)又はテフロン系樹脂(F)を配合した実施例1,3~5,8~12では成形外観、塗装外観も良好である。
本出願は、2021年3月17日付で出願された日本特許出願2021-043782に基づいており、その全体が引用により援用される。
Claims (7)
- ポリカーボネート樹脂(A)、およびワラストナイト(B)を含有してなる熱可塑性樹脂組成物において、ワラストナイト(B)が炭素数12以上の直鎖アルキル基を含むシランカップリング剤で処理されていることを特徴とする熱可塑性樹脂組成物。
- さらに、グラフト共重合体(C)、或いはグラフト共重合体(C)と少なくとも芳香族ビニル系単量体およびシアン化ビニル系単量体を共重合してなるビニル系共重合体(D)とを含む請求項1に記載の熱可塑性樹脂組成物。
- グラフト共重合体(C)が、ジエン系ゴム質重合体の存在下に、少なくとも芳香族ビニル系単量体およびシアン化ビニル系単量体を含有する単量体混合物をグラフト重合してなるゴム強化スチレンアクリロニトリル系グラフト共重合体である請求項2に記載の熱可塑性樹脂組成物。
- ポリカーボネート樹脂(A)45~65質量部と、ワラストナイト(B)を含む無機フィラー15~40質量部と、グラフト共重合体(C)7~20質量部と、ビニル系共重合体(D)0~20質量部とを、これらの合計が100質量部となるように含む請求項2又は3に記載の熱可塑性樹脂組成物。
- さらに、ポリカーボネート樹脂(A)、グラフト共重合体(C)およびビニル系共重合体(D)とは異なる、重量平均分子量が200万以上の超高分子量樹脂(E)、又はテフロン系樹脂(F)を含有する請求項2ないし4のいずれか1項に記載の熱可塑性樹脂組成物。
- 請求項1ないし5のいずれか1項に記載の熱可塑性樹脂組成物を成形してなる成形品。
- 車両外装部品である請求項6に記載の成形品。
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JP7463990B2 (ja) | 2024-04-09 |
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US20230391987A1 (en) | 2023-12-07 |
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