US 11,708,443 B2
Method of preparing graft copolymer
Ji Uk Jang, Daejeon (KR); Dae Woo Lee, Daejeon (KR); Jae Bum Seo, Daejeon (KR); Jung Tae Park, Daejeon (KR); and Gyu Sun Kim, Daejeon (KR)
Assigned to LG CHEM, LTD., Seoul (KR)
Appl. No. 17/47,657
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Nov. 8, 2019, PCT No. PCT/KR2019/015137
§ 371(c)(1), (2) Date Oct. 14, 2020,
PCT Pub. No. WO2020/101275, PCT Pub. Date May 22, 2020.
Claims priority of application No. 10-2018-0141065 (KR), filed on Nov. 15, 2018.
Prior Publication US 2021/0163652 A1, Jun. 3, 2021
Int. Cl. C08F 279/04 (2006.01); C08F 2/02 (2006.01); C08F 226/06 (2006.01); C08L 55/02 (2006.01)
CPC C08F 279/04 (2013.01) [C08F 2/02 (2013.01); C08F 226/06 (2013.01); C08L 55/02 (2013.01); C08L 2201/08 (2013.01)] 9 Claims
 
1. A method of preparing a graft copolymer, comprising:
preparing a liquid maleimide-based monomer;
preparing a reaction solution including a diene-based rubber polymer, an aromatic vinyl-based monomer, and a vinyl cyan-based monomer; and
adding the liquid maleimide-based monomer and the reaction solution to a reactor and carrying out polymerization,
wherein the liquid maleimide-based monomer is prepared by melting a solid-phase maleimide-based monomer.