US 12,006,429 B2
Thermoplastic resin composition
Seo Hwa Kim, Daejeon (KR); Byoung Il Kang, Daejeon (KR); Eun Jung Choi, Daejeon (KR); Taek Jun Jung, Daejeon (KR); Jeong In Cho, Daejeon (KR); and Dong Kun Shin, Daejeon (KR)
Assigned to LG CHEM, LTD., Seoul (KR)
Appl. No. 17/051,740
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Sep. 11, 2019, PCT No. PCT/KR2019/011840
§ 371(c)(1), (2) Date Oct. 29, 2020,
PCT Pub. No. WO2020/060110, PCT Pub. Date Mar. 26, 2020.
Claims priority of application No. 10-2018-0113966 (KR), filed on Sep. 21, 2018; and application No. 10-2019-0110895 (KR), filed on Sep. 6, 2019.
Prior Publication US 2021/0238407 A1, Aug. 5, 2021
Int. Cl. C08L 55/02 (2006.01); C08L 25/12 (2006.01); C08L 33/20 (2006.01)
CPC C08L 55/02 (2013.01) [C08L 25/12 (2013.01); C08L 33/20 (2013.01)] 11 Claims
 
1. A thermoplastic resin composition comprising:
a first copolymer including a conjugated diene-based polymer, an aromatic vinyl-based monomer unit, and a vinyl cyan-based monomer unit; and
a second copolymer including an aromatic vinyl-based monomer unit and a vinyl cyan-based monomer unit,
wherein the first copolymer has a degree of grafting of 32 to 50%,
the second copolymer has a weight-average molecular weight of 85,000 to 115,000 g/mol, and
the thermoplastic resin composition includes 30 wt % or less of the first copolymer and 1.1 wt % or less of an oligomer residue.