US 12,252,612 B2
Thermoplastic resin composition and molded article therefrom
Sang Ki Park, Uiwang-si (KR); and Tae Gon Kang, Uiwang-si (KR)
Assigned to Lotte Chemical Corporation, Seoul (KR)
Appl. No. 17/607,165
Filed by LOTTE CHEMICAL CORPORATION, Seoul (KR)
PCT Filed Jun. 5, 2020, PCT No. PCT/KR2020/007324
§ 371(c)(1), (2) Date Oct. 28, 2021,
PCT Pub. No. WO2020/262846, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. 10-2019-0077554 (KR), filed on Jun. 28, 2019.
Prior Publication US 2022/0243056 A1, Aug. 4, 2022
Int. Cl. C08K 3/34 (2006.01); C08K 5/00 (2006.01); C08K 5/49 (2006.01); C08L 69/00 (2006.01)
CPC C08L 69/00 (2013.01) [C08K 3/34 (2013.01); C08K 5/0066 (2013.01); C08K 5/49 (2013.01)] 11 Claims
 
1. A thermoplastic resin composition comprising:
about 100 parts by weight of a polycarbonate resin;
about 5 parts by weight to about 15 parts by weight of a first rubber-modified vinyl graft copolymer obtained through graft polymerization of a monomer mixture comprising an aromatic vinyl monomer and a vinyl cyanide monomer to a rubber polymer;
about 2 parts by weight to about 8 parts by weight of a second rubber-modified vinyl graft copolymer obtained through graft polymerization of an alkyl (meth) acrylate monomer to a rubber polymer;
about 0.5 parts by weight to about 2 parts by weight of siloxane copolyester;
about 17 to about 40 parts by weight of talc; and
about 13 parts by weight to about 23 parts by weight of a phosphorus flame retardant,
wherein a weight ratio of the first rubber-modified vinyl graft copolymer to the second rubber-modified vinyl graft copolymer is about 1:0.15 to about 1:0.8 and a weight ratio of the sum of the first rubber-modified vinyl graft copolymer and the second rubber-modified vinyl graft copolymer to the siloxane copolyester is about 1:0.03 to about 1:0.1.