The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 28, 2026
Filed:
Jan. 17, 2023
Lg Chem, Ltd., Seoul, KR;
Sung Won Hong, Yuseong-gu, KR;
Hyung Sub Lee, Yuseong-gu, KR;
Dae Woo Lee, Yuseong-gu, KR;
Woo Ri Kim, Yuseong-gu, KR;
Min Cheol Ju, Yuseong-gu, KR;
Min Seung Shin, Yuseong-gu, KR;
In Soo Kim, Yuseong-gu, KR;
LG CHEM, LTD., Seoul, KR;
Abstract
The present disclosure relates to a method of preparing a polymer, which includes: adding an alkyl-substituted aromatic vinyl-based monomer and a vinyl cyanide-based monomer to a reactor and initiating polymerization; and performing polymerization while continuously adding an alkyl-substituted aromatic vinyl-based monomer and a multifunctional initiator to the reactor, wherein the continuous addition of the alkyl-substituted aromatic vinyl-based monomer and the multifunctional initiator is initiated when a polymerization conversion rate is 10 to 30%, and the continuous addition of the alkyl-substituted aromatic vinyl-based monomer and the multifunctional initiator is terminated when a polymerization conversion rate is 70 to 80%.