ALEXANDRIA, Va., July 3 -- United States Patent no. 12,344,699, issued on July 1, was assigned to LG Chem Ltd. (Seoul, South Korea).
"Method for halogenating isobutene-isoprene copolymer" was invented by Jong Yeol Baek (Daejeon, South Korea), Moon Gon Jeong (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 method for halogenating an isobutene-isoprene copolymer by using an organic hypochlorite. By using the method of the present invention, a hydrogen halide byproduct may be rapidly recycled into a halogenating agent and reused. As a result, a halogenated isobutene-isoprene cop...