ALEXANDRIA, Va., July 7 -- United States Patent no. 12,674,007, issued on July 7, was assigned to LG Chem Ltd. (Seoul, South Korea).
"Preparation method for ethylene-vinyl alcohol copolymer" was invented by Hyojin Bae (Daejeon, South Korea), Bongjune Kim (Daejeon, South Korea), Sungjin Song (Daejeon, South Korea) and Se Won Baek (Daejeon, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for preparing ethylene-vinyl alcohol copolymer capable of obtaining ethylene-vinyl alcohol copolymer of high saponification degree, while minimizing the amount of alkali catalysts used is disclosed herein. The method comprises adding a first alkali catalyst solution dropwise to ethylene-vinyl acetate copoly...