US 11,993,695 B2
Thermoplastic resin composition having excellent heat resistance and electromagnetic wave shielding capacity, method of preparing thermoplastic resin composition, and injection-molded article manufactured using thermoplastic resin composition
Gi Dae Choi, Daejeon (KR); Youngjoo Kim, Daejeon (KR); Eon Seok Lee, Daejeon (KR); Changhun Yun, Daejeon (KR); and Minsu Kim, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 17/261,250
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Nov. 14, 2019, PCT No. PCT/KR2019/015571
§ 371(c)(1), (2) Date Jan. 19, 2021,
PCT Pub. No. WO2020/145500, PCT Pub. Date Jul. 16, 2020.
Claims priority of application No. 10-2019-0004003 (KR), filed on Jan. 11, 2019.
Prior Publication US 2021/0269617 A1, Sep. 2, 2021
Int. Cl. C08K 3/04 (2006.01); B29C 48/00 (2019.01); B29C 48/40 (2019.01); B29C 48/92 (2019.01); C08K 3/08 (2006.01); C08K 7/06 (2006.01); C08L 101/00 (2006.01); H05K 9/00 (2006.01); B29K 301/12 (2006.01)
CPC C08K 3/046 (2017.05) [B29C 48/0022 (2019.02); B29C 48/40 (2019.02); B29C 48/92 (2019.02); C08K 3/08 (2013.01); C08K 7/06 (2013.01); C08L 101/00 (2013.01); H05K 9/009 (2013.01); B29C 2948/92704 (2019.02); B29C 2948/92885 (2019.02); B29K 2301/12 (2013.01); B29K 2995/0011 (2013.01); C08K 2003/0843 (2013.01); C08K 2003/0856 (2013.01); C08K 2003/0862 (2013.01); C08K 2201/001 (2013.01); C08K 2201/003 (2013.01); C08K 2201/006 (2013.01); C08K 2201/01 (2013.01); C08K 2201/011 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A thermoplastic resin composition having excellent heat resistance and electromagnetic wave shielding capacity, comprising:
(a) 100 parts by weight of a thermoplastic resin comprising 80 to 90% by weight of a base resin and 10 to 20% by weight of an impact-reinforcing resin that is a modified polyolefin resin grafted with one or more unsaturated carboxylic acids or anhydrides thereof;
(b) 2 to 60 parts by weight of a linear carbon fiber having an average diameter of 3 to 15 μm;
(c) 1 to 5 parts by weight of a carbon nanofibril having a BET specific surface area of 200 to 400 m2/g;
(d) 1 to 15 parts by weight of a carbon nanoplate; and
(e) 1 to 25 parts by weight of a metal powder.