US Patent Issued to SK CHEMICALS on June 23 for "Method for producing polyester resin by using regenerated bis(2-hydroxyethyl) terephthalate aqueous solution" (South Korean Inventors)

ALEXANDRIA, Va., July 15 -- United States Patent no. 12,662,585, issued on June 23, was assigned to SK CHEMICALS Co. LTD. (Gyeonggi-do, South Korea).

"Method for producing polyester resin by using regenerated bis(2-hydroxyethyl) terephthalate aqueous solution" was invented by Da-Young Hwang (Gyeonggi-do, South Korea), Ha-Neul Kim (Gyeonggi-do, South Korea) and Yoo Jin Lee (Gyeonggi-do, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "A regenerated bis(2-hydroxyethyl) terephthalate obtained by the depolymerization of waste polyester is mixed with water to prepare an aqueous solution under specific temperature and concentration conditions, thereby ensuring storage stability. By introducing such a reg...