US Patent Issued to SK CHEMICALS on June 30 for "Method for preparing bis(glycol)terephthalate and polyester resin using same" (South Korean Inventors)

ALEXANDRIA, Va., July 16 -- United States Patent no. 12,668,564, issued on June 30, was assigned to SK CHEMICALS Co. LTD. (Gyeonggi-do, South Korea).

"Method for preparing bis(glycol)terephthalate and polyester resin using same" was invented by Young-Man Yoo (Gyeonggi-do, South Korea) and Eun-Yeong Hwang (Gyeonggi-do, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "Through a transesterification reaction in which a predetermined amount of bis(2-hydroxyethyl)terephthalate relative to glycol is fed in a divided or continuous manner, bis(glycol)terephthalate with a low residual amount of an ethylene glycol derivative is prepared, and polyester engineering products or biodegradable polyester products w...