公开(公告)号：US20220411559A1

公开(公告)日：2022-12-29

申请号：US17771679

申请日：2021-07-22

申请人： LG CHEM, LTD.

发明人： Heejung JEON ,  Geon Soo KIM ,  Moon Ja HWANG ,  Hyung Joon KIM ,  Changhoe KIM ,  Minsu CHAE

IPC分类号： C08F279/04 ,  C08F6/18 ,  C08F220/06 ,  C08F220/14 ,  C08F220/18

摘要： Disclosed is a method of preparing a graft copolymer and a method of preparing a thermoplastic resin composition including the prepared graft copolymer. Also disclosed is a method of preparing a graft copolymer including a process of adding an aromatic vinyl monomer and a vinyl cyanide monomer to a conjugated diene rubber latex that is enlarged with a polymer particle diameter control agent that has a specific glass transition temperature and an average particle diameter in a specific ratio to an average particle diameter of a conjugated diene rubber latex, and graft-polymerizing the same; and a method of preparing a thermoplastic resin composition including the prepared graft copolymer.
Also disclosed is a graft copolymer prepared using the conjugated diene rubber latex enlarged with the polymer particle diameter control agent exhibiting the synergistic effect of improving both impact strength and fluidity.