公开(公告)号：US20240002568A1

公开(公告)日：2024-01-04

申请号：US18035450

申请日：2022-08-17

Applicant: LG CHEM, LTD.

Inventor： Jae Bum SEO ,  Dae Woo LEE ,  Jung Tae PARK ,  Jung Rae LEE ,  Ji Uk JANG ,  Kyeong Soo SHIN

IPC: C08F222/30 ,  C08F2/00

CPC classification number: C08F222/30 ,  C08F2/001

Abstract: The present disclosure relates to a method of preparing a polymer including preparing a first polymer mixture by polymerizing while continuously adding a monomer mixture comprising a (meth)acrylate-based monomer, a vinyl aromatic monomer, and a first vinyl cyanide-based monomer to a first reactor; and preparing a second polymer mixture by polymerizing while continuously adding a second vinyl cyanide-based monomer and the first polymer mixture to a second reactor, wherein a starting time of the continuous addition of the second vinyl cyanide-based monomer and the first polymer mixture is a time when a polymerization conversion rate is 40.0 to 55.0%, and a weight ratio of the first vinyl cyanide-based monomer and the second vinyl cyanide-based monomer is 10:90 to 35:65.