# US 11,299,615 B2 · 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 11,299,615 B2 - Document ID: US11299615B2 - Status: Granted - Kind: B2 - Application number: 17/047,374 - Filed: 2019-09-05 - Published: 2021-04-22 - Granted: 2022-04-12 - Earliest claimed: 2018-09-05 - Assignees: LG Chem, Ltd. - Applicants: LG Chem, Ltd. - Inventors: Jeong Su Choi; Keun Hoon Yoo; Won Seok Lee; Roo Da Lee; Jong Ju Lee - Web page: https://patentgrep.com/patent/US11299615B2 ## CPC - C08L 51/003: {grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds (C08L51/04, C08L51/06 take precedence)} - C08L 51/04: grafted on to rubbers - C08F 279/02: on to polymers of conjugated dienes - C08F 285/00: Macromolecular compounds obtained by polymerising monomers on to preformed graft polymers - C08L 25/14: with unsaturated esters - C08L 33/08: Homopolymers or copolymers of acrylic acid esters - C08L 33/12: Homopolymers or copolymers of methyl methacrylate - C08L 33/18: Homopolymers or copolymers of nitriles - C08F 220/14: Methyl esters {, e.g. methyl (meth)acrylate} - C08L 2205/025: containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure - C08L 2205/035: containing four or more polymers in a blend - C08L 2205/22: Mixtures comprising a continuous polymer matrix in which are dispersed crosslinked particles of another polymer - C08L 2207/53: Core-shell polymer - 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 which includes: A-1) a first copolymer including a first conjugated diene-based polymer, an alkyl (meth)acrylate-based monomer unit, and an aromatic vinyl-based monomer unit, wherein the first conjugated diene-based polymer has an average particle diameter of 0.05 to 0.2 μm; A-2) a second copolymer including a second conjugated diene-based polymer, an alkyl (meth)acrylate-based monomer unit, and an aromatic vinyl-based monomer unit, wherein the second conjugated diene-based polymer has an average particle diameter of 0.23 to 0.5 μm; B) a third copolymer including an alkyl (meth)acrylate-based monomer unit and an aromatic vinyl-based monomer unit; and C) a plasticizer having a viscosity of 700 to 10,000 cP, wherein the plasticizer is included at 0.3 to 5 wt %. The thermoplastic resin composition is excellent in all of transparency, impact resistance, and flowability. ## Claims ### Claim 1 A thermoplastic resin composition comprising: A-1) a first copolymer including a first conjugated diene-based polymer, an alkyl (meth)acrylate-based monomer unit, and an aromatic vinyl-based monomer unit, wherein the first conjugated diene-based polymer has an average particle diameter of 0.05 to 0.2 μm; A-2) a second copolymer including a second conjugated diene-based polymer, an alkyl (meth)acrylate-based monomer unit, and an aromatic vinyl-based monomer unit, wherein the second conjugated diene-based polymer has an average particle diameter of 0.23 to 0.5 μm; B) a third copolymer including an alkyl (meth)acrylate-based monomer unit and an aromatic vinyl-based monomer unit; and C) a plasticizer having a viscosity of 700 to 10,000 cP, wherein the plasticizer is included at 0.3 to 5 wt %. ### Claim 2 (depends on 1) The thermoplastic resin composition of claim 1, wherein C) the plasticizer has a refractive index of 1.45 or more. ### Claim 3 (depends on 1) The thermoplastic resin composition of claim 1, wherein C) the plasticizer includes an aliphatic dicarboxylic acid-based monomer unit and an aliphatic dihydroxy-based monomer unit. ### Claim 4 (depends on 3) The thermoplastic resin composition of claim 3, wherein C) the plasticizer further includes one or more selected from the group consisting of an aliphatic ester-based monomer unit and an acetate-based monomer unit. ### Claim 5 (depends on 1) The thermoplastic resin composition of claim 1, wherein A-1) the first copolymer has a degree of grafting of 40 to 80%. ### Claim 6 (depends on 1) The thermoplastic resin composition of claim 1, wherein A-2) the second copolymer has a degree of grafting of 35 to 70%. ### Claim 7 (depends on 1) The thermoplastic resin composition of claim 1, wherein the refractive indices of the first to third copolymers differ by 0.01 or less. ### Claim 8 (depends on 1) The thermoplastic resin composition of claim 1, wherein the first to third copolymers further includes a vinyl cyan-based monomer unit. ### Claim 9 (depends on 1) The thermoplastic resin composition of claim 1, which includes: A-1) the first copolymer at 5 to 40 wt %; A-2) the second copolymer at 10 to 40 wt %; B) the third copolymer at 20 to 75 wt %; and C) the plasticizer at 0.3 to 5 wt %. ### Claim 10 (depends on 1) The thermoplastic resin composition of claim 1, which includes: the first conjugated diene-based polymer at 3 to 20 wt %; the second conjugated diene-based polymer at 3 to 20 wt %; the alkyl (meth)acrylate-based monomer unit at 45 to 65 wt %; the aromatic vinyl-based monomer unit at 10 to 30 wt %; and the plasticizer at 0.3 to 5 wt %. ### Claim 11 (depends on 1) The thermoplastic resin composition of claim 1, which has a degree of grafting of 35 to 65%. ### Claim 12 (depends on 1) The thermoplastic resin composition of claim 1, which has a melt flow index of 15 to 45 g/10 min, as measured at 220° C. ### Claim 13 (depends on 1) A thermoplastic resin molded article made of the thermoplastic resin composition of claim 1 and comprising an impact modifying part and a matrix part, wherein the impact modifying part includes one or more selected from the group consisting of a first conjugated diene-based polymer and a second conjugated diene-based polymer, the matrix part includes an alkyl (meth)acrylate-based monomer unit and an aromatic vinyl-based monomer unit, and the refractive index of the impact modifying part and the refractive index of the matrix part differ by 0.01 or less. ### Claim 14 (depends on 13) The thermoplastic resin molded article of claim 13, which has a haze value of 1.3 or less and an impact strength of 7 kg·cm/cm or more.