# US 8,569,415 B2 · Graft copolymer, thermoplastic resin composition and molded product > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,569,415 B2 - Document ID: US8569415B2 - Status: Granted - Kind: B2 - Application number: 12/668,204 - Filed: 2008-07-10 - Published: 2010-07-29 - Granted: 2013-10-29 - Earliest claimed: 2007-07-13 - Assignees: Mitsubishi Rayon Co., Ltd.; Techno Polymer Co., Ltd. - Applicants: Tsuneki Wakita; Toshihiro Kasai; Masaki Maeda; Yasunobu Kaneko - Inventors: Tsuneki Wakita; Toshihiro Kasai; Masaki Maeda; Yasunobu Kaneko - Web page: https://patentgrep.com/patent/US8569415B2 ## CPC - C08F 285/00: Macromolecular compounds obtained by polymerising monomers on to preformed graft polymers - C08F 265/04: on to polymers of esters - C08F 283/12: on to polysiloxanes - C08F 291/00: Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds according to more than one of the groups C08F251/00 - C08F289/00 - C08L 51/04: grafted on to rubbers - C08L 51/085: {on to polysiloxanes} - C08L 53/005: {Modified block copolymers} - C23C 14/20: on organic substrates - C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04) ## Abstract There is provided a resin which, in spite of having excellent impact resistance because of containing a rubber ingredient, can be molded into a haze-free and beautiful state across the entire surface of molded products even if the molded products are large-sized injection molded products, and is suitable for molded products on which a vapor deposition layer is formed by the direct vapor deposition method, and is suitable for molded products which are joined by the hot plate welding method, particularly molded products such as housing members of automotive lamps, which require weatherability. Also provided is a graft copolymer (B) obtained by polymerizing a (meth)acrylate monomer (b1) a homopolymer of which has a glass transition temperature exceeding 0° C. in the presence of a composite rubber (A) containing a polyorganosiloxane (A1) and a poly(meth)acrylate (A2), and then polymerizing an aromatic vinyl monomer (b2) and a cyanided vinyl monomer (b3). ## Claims ### Claim 1 A graft copolymer (B), prepared by polymerizing a (meth)acrylate monomer (b1), a homopolymer of which has a glass transition temperature exceeding 0° C., in the presence of a composite rubber (A) containing a polyorganosiloxane (A1) and a poly(meth)acrylate (A2), and then polymerizing an aromatic vinyl monomer (b2) and a cyanided vinyl monomer (b3). ### Claim 2 (depends on 1, 99) A thermoplastic resin composition, containing 1 to 99% by mass of a graft copolymer (B) according to claim 1 and 99 to 1% by mass of a thermoplastic resin (C). ### Claim 3 (depends on 2) The thermoplastic resin composition according to claim 2, wherein the thermoplastic resin composition comprises a molded product on a surface of which a vapor deposition layer is formed by direct vapor deposition. ### Claim 4 (depends on 2) The thermoplastic resin composition according to claim 2, wherein the thermoplastic resin composition comprises a molded product to be used in a hot plate welding method. ### Claim 5 (depends on 2) A molded product comprising a thermoplastic resin composition according to claim 2. ### Claim 6 (depends on 3) A molded product comprising a thermoplastic resin composition according to claim 3. ### Claim 7 (depends on 4) A molded product comprising a thermoplastic resin composition according to claim 4. ### Claim 8 (depends on 5) An automotive lamp, obtained by joining a molded product according to claim 5 and a lens member by a hot plate welding method. ### Claim 9 (depends on 6) An automotive lamp, obtained by joining a molded product according to claim 6 and a lens member by a hot plate welding method. ### Claim 10 (depends on 7) An automotive lamp, obtained by joining a molded product according to claim 7 and a lens member by a hot plate welding method. ### Claim 11 (depends on 1) The graft copolymer according to claim 1, wherein the (meth)acrylate monomer (b1) is an alkyl methacrylate. ### Claim 12 (depends on 1) The graft copolymer according to claim 1, wherein the polyorganosiloxane (A1) is a cyclic organosiloxane which is linked through a graft crossing agent. ### Claim 13 (depends on 1) The graft copolymer according to claim 1, wherein the aromatic vinyl monomer (b2) is styrene, α-methylstyrene or vinyltoluene. ### Claim 14 (depends on 1) The graft copolymer according to claim 1, wherein the cyanided vinyl monomer (b3) is acrylonitrile or methacrylonitrile. ### Claim 15 (depends on 2) The thermoplastic resin composition according to claim 2, wherein the thermoplastic resin (C) comprises at least one member selected from the group consisting of polymethyl methacrylates, polycarbonate resins, polybutylene terephthalates, polyethylene terephthalates, polyethylene naphthalates, polyvinyl chlorides, polystyrenes, modified polyphenylene ethers, polyamides, acrylonitrile-styrene copolymers, acrylonitrile-α-methylstyrene copolymers, styrene-maleic anhydride copolymers, methyl methacrylate-styrene copolymers, acrylonitrile-styrene-N-substituted maleimide ternary copolymers, styrene-maleic anhydride-N-substituted maleimide ternary copolymers and acrylonitrile-styrene-methyl methacrylate copolymers. ### Claim 16 (depends on 1) A method of making the graft copolymer (B) according to claim 1, comprising: (1) polymerizing a (meth)acrylate monomer (b1), a homopolymer of which has a glass transition temperature exceeding 0° C., in the presence of a composite rubber (A) containing a polyorganosiloxane (A1) and a poly(meth)acrylate (A2), and then (2) polymerizing an aromatic vinyl monomer (b2) and a cyanided vinyl monomer (b3).