# US 11,299,623 B2 · Thermoplastic resin composition, molded resin article thereof, and coated article > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,299,623 B2 - Document ID: US11299623B2 - Status: Granted - Kind: B2 - Application number: 16/624,657 - Filed: 2018-06-18 - Published: 2020-06-11 - Granted: 2022-04-12 - Earliest claimed: 2017-06-26 - Assignees: Techno-Umg Co., Ltd. - Applicants: Techno-UMG Co., Ltd. - Inventors: Shinji Yamashita; Hiroshi Sakai - Web page: https://patentgrep.com/patent/US11299623B2 ## CPC - C08L 69/00: Compositions of polycarbonates; Compositions of derivatives of polycarbonates - C08F 212/10: with nitriles - C08F 279/04: Vinyl aromatic monomers and nitriles as the only monomers - C08L 25/12: with unsaturated nitriles - C08L 51/04: grafted on to rubbers - C08L 2203/20: use in electrical or conductive gadgets - C08L 2205/035: containing four or more polymers in a blend - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS ## Abstract The present invention provides a thermoplastic resin composition in which occurrence of an absorption phenomenon in a coating step can be suppressed and which is excellent in terms of impact resistance, heat resistance, and fluidity during a molding step; a coated article; and a molded resin article obtained by molding the thermoplastic resin composition. The thermoplastic resin composition contains: 35 to 75 parts by mass of an aromatic polycarbonate resin (A); 15 to 35 parts by mass of a rubber-containing graft copolymer (B) obtained by copolymerizing a monomer mixture comprising an aromatic vinyl compound and a vinyl cyanide compound in the presence of a rubbery polymer; and 10 to 50 parts by mass of a rigid copolymer mixture (C) containing a rigid copolymer (C-I) and a rigid copolymer (C-II), in which in the rigid copolymer mixture (C), an amount of the rigid copolymer (C-II) is 20% to 80% by mass in the mixture. ## Claims ### Claim 1 A thermoplastic resin composition comprising: 35 to 75 parts by mass of an aromatic polycarbonate resin (A); 15 to 35 parts by mass of a rubber-containing graft copolymer (B) obtained by copolymerizing a monomer mixture containing an aromatic vinyl compound and a vinyl cyanide compound in the presence of a rubber polymer; and 10 to 50 parts by mass of a rigid copolymer mixture (C) containing a rigid copolymer (C-I) and a rigid copolymer (C-II), wherein the thermoplastic resin composition does not comprise phosphorus-based flame retardants, in the rigid copolymer mixture (C), an amount of the rigid copolymer (C-II) is 20% to 80% by mass in the mixture, the rigid copolymer (C-I) is a polymer containing a monomer unit derived from an aromatic vinyl compound and a monomer unit derived from a vinyl cyanide compound and is a rigid copolymer in which 20% by mass or more and less than 35% by mass of a total mass of the rigid copolymer (C-I) is the monomer unit derived from the vinyl cyanide compound, the rigid copolymer (C-II) is a polymer containing a monomer unit derived from an aromatic vinyl compound and a monomer unit derived from a vinyl cyanide compound and is a rigid copolymer in which 40% to 50% by mass of a total mass of the rigid copolymer (C-II) is the monomer unit derived from the vinyl cyanide compound, the thermoplastic resin composition contains an acetone soluble component of which reduced viscosity (ηsp/c) is 0.3 to 0.8 dl/g, and a component content of the vinyl cyanide compound in the acetone soluble component is 25% to 40%, wherein the thermoplastic resin composition is configured to suppress absorption of a coating material applied to the thermoplastic resin composition. ### Claim 2 A molded resin article obtained by molding a thermoplastic resin composition, wherein the thermoplastic resin composition comprises: 35 to 75 parts by mass of an aromatic polycarbonate resin (A); 15 to 35 parts by mass of a rubber-containing graft copolymer (B) obtained by copolymerizing a monomer mixture containing an aromatic vinyl compound and a vinyl cyanide compound in the presence of a rubber polymer; and 10 to 50 parts by mass of a rigid copolymer mixture (C) containing a rigid copolymer (C-I) and a rigid copolymer (C-II), wherein the thermoplastic resin composition does not comprise phosphorus-based flame retardants, in the rigid copolymer mixture (C), an amount of the rigid copolymer (C-II) is 20% to 80% by mass in the mixture, the rigid copolymer (C-I) is a polymer containing a monomer unit derived from an aromatic vinyl compound and a monomer unit derived from a vinyl cyanide compound and is a rigid copolymer in which 20% by mass or more and less than 35% by mass of a total mass of the rigid copolymer (C-I) is the monomer unit derived from the vinyl cyanide compound, the rigid copolymer (C-II) is a polymer containing a monomer unit derived from an aromatic vinyl compound and a monomer unit derived from a vinyl cyanide compound and is a rigid copolymer in which 40% to 50% by mass of a total mass of the rigid copolymer (C-II) is the monomer unit derived from the vinyl cyanide compound, the thermoplastic resin composition contains an acetone soluble component of which reduced viscosity (ηsp/c) is 0.3 to 0.8 dl/g, and a component content of the vinyl cyanide compound in the acetone soluble component is 25% to 40%, wherein the molded resin article is configured to suppress absorption of a coating material applied to the molded resin article. ### Claim 3 A coated article formed of a molded resin article obtained by molding a thermoplastic resin composition, wherein the thermoplastic resin composition comprises: 35 to 75 parts by mass of an aromatic polycarbonate resin (A); 15 to 35 parts by mass of a rubber-containing graft copolymer (B) obtained by copolymerizing a monomer mixture containing an aromatic vinyl compound and a vinyl cyanide compound in the presence of a rubber polymer; and 10 to 50 parts by mass of a rigid copolymer mixture (C) containing a rigid copolymer (C-I) and a rigid copolymer (C-II), wherein the thermoplastic resin composition does not comprise phosphorus-based flame retardants, in the rigid copolymer mixture (C), an amount of the rigid copolymer (C-II) is 20% to 80% by mass in the mixture, the rigid copolymer (C-I) is a polymer containing a monomer unit derived from an aromatic vinyl compound and a monomer unit derived from a vinyl cyanide compound and is a rigid copolymer in which 20% by mass or more and less than 35% by mass of a total mass of the rigid copolymer (C-I) is the monomer unit derived from the vinyl cyanide compound, the rigid copolymer (C-II) is a polymer containing a monomer unit derived from an aromatic vinyl compound and a monomer unit derived from a vinyl cyanide compound and is a rigid copolymer in which 40% to 50% by mass of a total mass of the rigid copolymer (C-II) is the monomer unit derived from the vinyl cyanide compound, the thermoplastic resin composition contains an acetone soluble component of which reduced viscosity (ηsp/c) is 0.3 to 0.8 dl/g, and a component content of the vinyl cyanide compound in the acetone soluble component is 25% to 40%. ### Claim 4 (depends on 1) The thermoplastic resin composition of claim 1, wherein the absorption suppression occurs during a coating step. ### Claim 5 (depends on 3) The coated article of claim 3, wherein the coated article comprises a urethane-based coating material.