US Patent Issued to LG Chem on June 3 for "Catalyst composition and method for preparing isobutene-isoprene copolymer using the same" (South Korean Inventors)

ALEXANDRIA, Va., June 4 -- United States Patent no. 12,319,771, issued on June 3, was assigned to LG Chem Ltd. (Seoul, South Korea).

"Catalyst composition and method for preparing isobutene-isoprene copolymer using the same" was invented by Jeong Sik Kim (Daejeon, South Korea), Hee Jeong Kim (Daejeon, South Korea), Gyeong Shin Choi (Daejeon, South Korea) and Won Hee Kim (Daejeon, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a catalyst composition including an imidazolinium ion-based catalyst and an aluminum-based cocatalyst, and a method for preparing an isobutene-isoprene copolymer using the same."

The patent was filed on Sept. 7, 2021, under Application No. 1...