US 12,351,713 B2
Thermoplastic resin composition, method of preparing the same, and molded article manufactured using the same
Junho Choe, Daejeon (KR); Seong Lyong Kim, Daejeon (KR); Dae San Jung, Daejeon (KR); Ho Namgung, Daejeon (KR); and Seokhee Jo, Daejeon (KR)
Assigned to LG CHEM, LTD., Seoul (KR)
Appl. No. 17/773,395
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Jul. 6, 2021, PCT No. PCT/KR2021/008533
§ 371(c)(1), (2) Date Apr. 29, 2022,
PCT Pub. No. WO2022/065640, PCT Pub. Date Mar. 31, 2022.
Claims priority of application No. 10-2020-0124006 (KR), filed on Sep. 24, 2020; and application No. 10-2021-0086462 (KR), filed on Jul. 1, 2021.
Prior Publication US 2022/0380593 A1, Dec. 1, 2022
Int. Cl. C08L 55/02 (2006.01); B29C 48/00 (2019.01); C08F 212/08 (2006.01); C08F 220/44 (2006.01); C08F 222/40 (2006.01); C08J 3/12 (2006.01); C08L 23/06 (2006.01); C08L 25/12 (2006.01); C08L 51/00 (2006.01)
CPC C08L 55/02 (2013.01) [B29C 48/0017 (2019.02); B29C 48/022 (2019.02); C08F 212/08 (2013.01); C08F 220/44 (2013.01); C08F 222/40 (2013.01); C08J 3/12 (2013.01); C08L 23/06 (2013.01); C08L 25/12 (2013.01); C08L 51/003 (2013.01); C08L 2203/30 (2013.01); C08L 2205/025 (2013.01); C08L 2205/035 (2013.01); C08L 2207/062 (2013.01)] 13 Claims
 
1. A thermoplastic resin composition, comprising:
100 parts by weight of a base resin comprising 15 to 50% by weight of a vinyl cyanide compound-conjugated diene compound-aromatic vinyl compound graft copolymer (A); 20 to 55% by weight of a vinyl cyanide compound-conjugated diene compound-aromatic vinyl compound copolymer (B); 4 to 11% by weight of an acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (C) having a graft ratio of 40 to 60% and a weight average molecular weight of 150,000 to 200,000 g/mol; 3.5 to 9% by weight of a vinyl cyanide compound-aromatic vinyl compound copolymer (D) having a weight average molecular weight of 1,000,000 to 2,500,000 g/mol; and 2 to 10% by weight of a branched vinyl cyanide compound-aromatic vinyl compound copolymer (E) having a weight average molecular weight of 300,000 to 800,000 g/mol, and
0.1 to 2.5 parts by weight of a high-density polyethylene resin (F) having a density of 0.9 to 1.5 g/cm3 and a weight average molecular weight of 1,000 to 6,500 g/mol,
wherein the graft copolymer (A) has a graft ratio of 32 to 50%.