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. 05, 2022
Filed:
Aug. 28, 2019
Lg Chem, Ltd., Seoul, KR;
Bong Keun Ahn, Daejeon, KR;
Min Jung Kim, Daejeon, KR;
Wang Rae Joe, Daejeon, KR;
Yong Yeon Hwang, Daejeon, KR;
Jang Won Park, Daejeon, KR;
Ji Yoon Jeon, Daejeon, KR;
LG CHEM, LTD., Seoul, KR;
Abstract
A method for preparing a graft copolymer includes the steps of: 1) preparing a seed by adding one or more selected from the group consisting of an alkyl (meth)acrylate-based monomer, an aromatic vinyl-based monomer, and a vinyl cyan-based monomer and carrying out polymerization; 2) preparing a core in the presence of the seed by adding an alkyl (meth)acrylate-based monomer and carrying out polymerization; and 3) preparing a shell in the presence of the core by adding an aromatic vinyl-based monomer and a vinyl cyan-based monomer and carrying out polymerization, wherein an activator including a compound represented by Chemical Formula 1 is added in the step 3). In Chemical Formula 1, Rand Rare each independently hydrogen, a C-Calkyl group, or *-(C=O)OM, provided that Rand Rare not both hydrogen, and Mand Mare each independently an alkali metal.