US 12,410,310 B2
Thermoplastic resin composition
Ho Namgung, Daejeon (KR); Do Hyeong Kim, Daejeon (KR); Seong Lyong Kim, Daejeon (KR); and Dae San Jung, Daejeon (KR)
Assigned to LG CHEM, LTD., Seoul (KR)
Appl. No. 17/440,656
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Sep. 17, 2020, PCT No. PCT/KR2020/012578
§ 371(c)(1), (2) Date Sep. 17, 2021,
PCT Pub. No. WO2021/091079, PCT Pub. Date May 14, 2021.
Claims priority of application No. 10-2019-0139639 (KR), filed on Nov. 4, 2019.
Prior Publication US 2022/0153979 A1, May 19, 2022
Int. Cl. C08L 25/12 (2006.01); C08L 25/16 (2006.01)
CPC C08L 25/12 (2013.01) [C08L 25/16 (2013.01); C08L 2203/30 (2013.01); C08L 2205/025 (2013.01); C08L 2205/035 (2013.01)] 8 Claims
 
1. A thermoplastic resin composition comprising:
a diene-based rubber graft polymer;
an alkyl-unsubstituted styrene-based polymer;
an alkyl-substituted styrene-based polymer comprising an alkyl-substituted styrene-based monomer unit, an alkyl-unsubstituted styrene-based monomer unit, and a vinyl cyanide-based monomer unit; and
a maleimide-based polymer having a weight-average molecular weight of 110,000 to 127,000 g/mol,
wherein the maleimide-based polymer has a glass transition temperature of 180 to 190° C.,
wherein the diene-based rubber graft polymer comprises a first diene-based rubber graft polymer formed by graft polymerization of a diene-based rubber polymer having an average particle diameter of 200 to 400 nm with an aromatic vinyl-based monomer and a vinyl cyanide-based monomer, and a second diene-based rubber graft polymer formed by graft polymerization of a diene-based rubber polymer having an average particle diameter of 50 to 150 nm with an aromatic vinyl-based monomer and a vinyl cyanide-based monomer, and
wherein the diene-based rubber graft polymer comprises the first diene-based rubber graft polymer and the second diene-based rubber graft polymer in a weight ratio of 30:70 to 45:55.