US Patent Issued to LG CHEM on Sept. 22 for "Method for preparing polyphenylene oxide" (South Korean Inventors)

ALEXANDRIA, Va., Sept. 24 -- United States Patent no. 12,742,043, issued on Sept. 22, was assigned to LG CHEM Ltd. (Seoul, South Korea).

"Method for preparing polyphenylene oxide" was invented by Gyeongshin Choi (Daejeon, South Korea), Jihyun Choi (Daejeon, South Korea) and Chunhwa Lee (Daejeon, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for preparing polyphenylene oxide, the method capable of reducing energy cost by eliminating the need for a separate process of separating and purifying ortho-cresol which is produced after an alkylation reaction of phenol, and preparing polyphenylene oxide with excellent processability in excellent yields under mild oxidative coupling reaction condi...