ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,497,499, issued on Dec. 16, was assigned to ENEOS MATERIALS Corp. (Tokyo).
"Polymer composition production method" was invented by Yusuke Amano (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of producing a polymer composition is provided, including: kneading (A) a conjugated diene-based polymer that is a polymer of a conjugated diene compound or a copolymer of a conjugated diene compound and an aromatic vinyl compound, and is a reaction product between an active polymerization end and a compound represented by any one of the general formulae (1) to (3), and (B) a basic compound having an acid dissociation constant of 8.0 or more; and kne...