# US 10,118,982 B2 · Graft copolymer and thermoplastic resin composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,118,982 B2 - Document ID: US10118982B2 - Status: Granted - Kind: B2 - Application number: 15/304,773 - Filed: 2015-04-17 - Published: 2017-02-09 - Granted: 2018-11-06 - Earliest claimed: 2014-04-18 - Assignees: Nippon A&L Inc. - Applicants: Nippon A&L Inc. - Inventors: Kazuhiro Ishigaki; Kiyoshi Ikawa; Taisuke Yukawa - Web page: https://patentgrep.com/patent/US10118982B2 ## CPC - C08F 255/02: on to polymers of olefins having two or three carbon atoms - C08F 255/00: Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00 - C08F 255/10: on to butene polymers - C08L 25/12: with unsaturated nitriles - C08L 51/06: grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond - C08L 69/00: Compositions of polycarbonates; Compositions of derivatives of polycarbonates - C08L 2205/035: containing four or more polymers in a blend - C08L 51/04: grafted on to rubbers - 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) ## Abstract Provided is a graft copolymer (A) obtainable by graft-polymerizing, in the presence of 30 to 80 parts by mass of an ethylene-based polymer (a), an aromatic vinyl-based monomer (b) and, if necessary, another vinyl-based monomer (c) copolymerizable with the aromatic vinyl-based monomer (b) in a total amount of 20 to 70 parts by mass (provided that the sum of the components (a), (b) and (c) is 100 parts by mass), in which the ethylene-based polymer (a) has a density of 0.900 g/cm3 or more and less than 0.966 g/cm3, a number average molecular weight of 10,000 to 50,000, and a molecular weight distribution of 5 to 15, and the proportion of the ethylene-based polymer (a) molecules having a molecular weight of 10,000 or less is 5.5% or more. ## Claims ### Claim 1 A graft copolymer (A) obtainable by graft-polymerizing: an aromatic vinyl-based monomer (b) in an amount of 20 to 70 parts by mass, in the presence of 30 to 80 parts by mass of an ethylene-based polymer (a) provided that the sum of components (a) and (b) is 100 parts by mass; or an aromatic vinyl-based monomer (b) and another vinyl-based monomer (c) copolymerizable with the aromatic vinyl-based monomer (b) in a total amount of 20 to 70 parts by mass, in the presence of 30 to 80 parts by mass of an ethylene-based polymer (a) provided that the sum of components (a), (b) and (c) is 100 parts by mass, wherein the ethylene-based polymer (a) has a density of 0.900 g/cm3 or more and less than 0.966 g/cm3, a number average molecular weight of 10,000 to 50,000, and a molecular weight distribution of 5 to 15, and the proportion of the ethylene-based polymer (a) molecules having a molecular weight of 10,000 or less is 5.5% or more. ### Claim 2 (depends on 1) The graft copolymer according to claim 1, wherein the graft ratio is 30% or higher. ### Claim 3 (depends on 1) The graft copolymer according to claim 1, wherein the ethylene-based polymer (a) is an ethylene-α-olefin copolymer containing ethylene and an α-olefin having 3 to 20 carbon atoms as copolymerization components. ### Claim 4 (depends on 1) The graft copolymer according to claim 1, wherein the number average particle size, [(long side+short side)/2], of the ethylene-based polymer (a) is 500 to 4,500 μm. ### Claim 5 A graft copolymer (A) obtainable by graft-polymerizing: an aromatic vinyl-based monomer (b) in an amount of 20 to 70 parts by mass, in the presence of 30 to 80 parts by mass of an ethylene-based polymer (a) provided that the sum of components (a) and (b) is 100 parts by mass; or an aromatic vinyl-based monomer (b) and another vinyl-based monomer (c) copolymerizable with the aromatic vinyl-based monomer (b) in a total amount of 20 to 70 parts by mass, in the presence of 30 to 80 parts by mass of an ethylene-based polymer (a) provided that the sum of the components (a), (b) and (c) is 100 parts by mass, wherein the ethylene-based polymer (a) has a density of 0.900 g/cm3 or more and less than 0.966 g/cm3 and a flow activation energy of 40 to 120 kJ/mol. ### Claim 6 (depends on 5) The graft copolymer according to claim 5, wherein the graft ratio is 30% or higher. ### Claim 7 (depends on 5) The graft copolymer according to claim 5, wherein the ethylene-based polymer (a) is an ethylene-α-olefin copolymer containing ethylene and an α-olefin having 3 to 20 carbon atoms as copolymerization components. ### Claim 8 (depends on 5) The graft copolymer according to claim 5, wherein the number average particle size, [(long side+short side)/2], of the ethylene-based polymer (a) is 500 to 4,500 μm. ### Claim 9 (depends on 1) A thermoplastic resin composition comprising the graft copolymer (A) according to claim 1 and a thermoplastic resin (B) other than the graft copolymer (A), wherein the content of the graft copolymer (A) is 1 to 50 parts by mass, and the content of the thermoplastic resin (B) is 50 to 99 parts by mass, with respect to a total amount of 100 parts by mass of the graft copolymer (A) and the thermoplastic resin (B). ### Claim 10 (depends on 9) The thermoplastic resin composition according to claim 9, wherein the thermoplastic resin (B) is a styrene-based resin. ### Claim 11 (depends on 9) The thermoplastic resin composition according to claim 9, wherein the thermoplastic resin (B) is a polycarbonate resin. ### Claim 12 (depends on 9) The thermoplastic resin composition according to claim 9, wherein the thermoplastic resin (B) includes a styrene-based resin and a polycarbonate resin. ### Claim 13 (depends on 2) The graft copolymer according to claim 2, wherein the ethylene-based polymer (a) is an ethylene-α-olefin copolymer containing ethylene and an α-olefin having 3 to 20 carbon atoms as copolymerization components. ### Claim 14 (depends on 2) The graft copolymer according to claim 2, wherein the number average particle size, [(long side+short side)/2], of the ethylene-based polymer (a) is 500 to 4,500 μm. ### Claim 15 (depends on 13) The graft copolymer according to claim 13, wherein the number average particle size, [(long side+short side)/2], of the ethylene-based polymer (a) is 500 to 4,500 μm. ### Claim 16 (depends on 6) The graft copolymer according to claim 6, wherein the ethylene-based polymer (a) is an ethylene-α-olefin copolymer containing ethylene and an α-olefin having 3 to 20 carbon atoms as copolymerization components. ### Claim 17 (depends on 6) The graft copolymer according to claim 6, wherein the number average particle size, [(long side+short side)/2], of the ethylene-based polymer (a) is 500 to 4,500 μm. ### Claim 18 (depends on 16) The graft copolymer according to claim 16, wherein the number average particle size, [(long side+short side)/2], of the ethylene-based polymer (a) is 500 to 4,500 μm. ### Claim 19 (depends on 5) A thermoplastic resin composition comprising the graft copolymer (A) according to claim 5 and a thermoplastic resin (B) other than the graft copolymer (A), wherein the content of the graft copolymer (A) is 1 to 50 parts by mass, and the content of the thermoplastic resin (B) is 50 to 99 parts by mass, with respect to a total amount of 100 parts by mass of the graft copolymer (A) and the thermoplastic resin (B). ### Claim 20 (depends on 19) The thermoplastic resin composition according to claim 19, wherein the thermoplastic resin (B) is a styrene-based resin. ### Claim 21 (depends on 19) The thermoplastic resin composition according to claim 19, wherein the thermoplastic resin (B) is a polycarbonate resin. ### Claim 22 (depends on 19) The thermoplastic resin composition according to claim 19, wherein the thermoplastic resin (B) includes a styrene-based resin and a polycarbonate resin.