# US 12,006,428 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 12,006,428 B2 - Document ID: US12006428B2 - Status: Granted - Kind: B2 - Application number: 17/436,554 - Filed: 2020-10-06 - Published: 2022-06-09 - Granted: 2024-06-11 - Earliest claimed: 2019-10-23 - Assignees: LG Chem, Ltd. - Applicants: LG Chem, Ltd. - Inventors: Jun Ho Choe; Seung Cheol Ryoo; Seong Lyong Kim; Dae San Jung - Web page: https://patentgrep.com/patent/US12006428B2 ## CPC - C08L 25/12: with unsaturated nitriles - C08L 25/16: Homopolymers or copolymers of alkyl-substituted styrenes - C08L 2203/30: used for thermoforming - C08L 2205/02: containing two or more polymers of the same C08L -group - 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 2205/03: containing three or more polymers in a blend - C08L 2205/035: containing four or more polymers in a blend - C08L 2205/18: Spheres - C08L 2207/066: LDPE (radical process) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract The present invention provides a thermoplastic resin composition which comprises: a first polymer formed by graft polymerization of a diene-based rubber polymer with an aromatic vinyl-based monomer and a vinyl cyanide-based monomer; a second polymer comprising an aromatic vinyl-based monomer unit and a vinyl cyanide-based monomer unit; a third polymer formed by graft polymerization of an olefin-based polymer with an aromatic vinyl-based monomer and a vinyl cyanide-based monomer; and a fourth polymer comprising an olefin-based monomer unit and having a density of 0.92 to 0.94 g/cm3 as measured in accordance with ASTM D1505, a softening point of 100 to 120° C. as measured in accordance with ASTM D1525, and a melt flow index of 5 to 7 g/10 min as measured in accordance with ASTM D1238 at 190° C. and 2.16 kg, wherein the thermoplastic resin composition comprises the fourth polymer at 1 to 10 wt %. ## Claims ### Claim 1 A thermoplastic resin composition comprising: a first polymer formed by graft polymerization of a diene-based rubber polymer with an aromatic vinyl-based monomer and a vinyl cyanide-based monomer; a second polymer comprising an aromatic vinyl-based monomer unit and a vinyl cyanide-based monomer unit; a third polymer formed by graft polymerization of an olefin-based polymer with an aromatic vinyl-based monomer and a vinyl cyanide-based monomer; and a fourth polymer comprising an olefin-based monomer unit and having a density of 0.92 to 0.94 g/cm3 as measured in accordance with ASTM D1505, a softening point of 100 to 120° C. as measured in accordance with ASTM D1525, and a melt flow index of 5 to 7 g/10 min as measured in accordance with ASTM D1238 at 190° C. and 2.16 kg, wherein the thermoplastic resin composition comprises the fourth polymer at 1 to 10 wt %. ### Claim 2 (depends on 1) The thermoplastic resin composition of claim 1, wherein the thermoplastic resin composition comprises the fourth polymer at 3 to 8 wt %. ### Claim 3 (depends on 1) The thermoplastic resin composition of claim 1, wherein the thermoplastic resin composition comprises the third polymer and the fourth polymer in a weight ratio of 25:75 to 90:10. ### Claim 4 (depends on 1) The thermoplastic resin composition of claim 1, wherein the thermoplastic resin composition comprises: the first polymer at 25 to 40 wt %; the second polymer at 45 to 70 wt %; and the third polymer at 1 to 10 wt %. ### Claim 5 (depends on 1) The thermoplastic resin composition of claim 1, wherein the thermoplastic resin composition comprises: the first polymer at 27 to 37 wt %; the second polymer at 50 to 65 wt %; and the third polymer at 3 to 7 wt %. ### Claim 6 (depends on 1) The thermoplastic resin composition of claim 1, wherein the diene-based rubber polymer of the first polymer has an average particle diameter of 300 to 400 nm. ### Claim 7 (depends on 1) The thermoplastic resin composition of claim 1, wherein the second polymer is selected from the group consisting of a polymer comprising an alkyl-substituted styrene-based monomer unit and a vinyl cyanide-based monomer unit, a polymer comprising an alkyl-unsubstituted styrene-based monomer unit and a vinyl cyanide-based monomer unit, and a polymer comprising an alkyl-substituted styrene-based monomer unit, an alkyl-unsubstituted styrene-based unit, and a vinyl cyanide-based monomer unit. ### Claim 8 (depends on 1) The thermoplastic resin composition of claim 1, wherein the fourth polymer comprises at least two types of mutually different olefin-based monomer units. ### Claim 9 (depends on 1) The thermoplastic resin composition of claim 1, further comprising a fifth polymer comprising a maleimide-based monomer unit, an aromatic vinyl-based monomer unit, and a maleic acid-based monomer unit. ### Claim 10 (depends on 9) The thermoplastic resin composition of claim 9, wherein the thermoplastic resin composition comprises: the first polymer at 25 to 45 wt %; the second polymer at 30 to 50 wt %; the third polymer at 1 to 10 wt %; the fourth polymer at 1 to 10 wt %; and the fifth polymer at 5 to 25 wt %.