ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,492,278, issued on Dec. 9, was assigned to LG CHEM Ltd. (Seoul, South Korea).
"Method of preparing graft polymer" was invented by Ji Uk Jang (Daejeon, South Korea), Dae Woo Lee (Daejeon, South Korea), Jae Bum Seo (Daejeon, South Korea), Jung Tae Park (Daejeon, South Korea) and Jung Rae Lee (Daejeon, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to a method of preparing a graft polymer, which includes: performing primary continuous polymerization by adding a diene-based rubber polymer and an aromatic vinyl-based monomer to a first reactor; and performing secondary continuous polymerization by adding the polymeri...