US Patent Issued to MITSUBISHI GAS CHEMICAL on March 4 for "Methods for producing polycarbonate copolymer and polysiloxane compound, polycarbonate copolymer, polysiloxane compound, composition, and molded body" (Japanese Inventors)

ALEXANDRIA, Va., March 5 -- United States Patent no. 12,240,978, issued on March 4, was assigned to MITSUBISHI GAS CHEMICAL COMPANY INC. (Tokyo).

"Methods for producing polycarbonate copolymer and polysiloxane compound, polycarbonate copolymer, polysiloxane compound, composition, and molded body" was invented by Kazuyoshi Uera (Tokyo), Kohei Kamatani (Tokyo), Keisuke Tomita (Tokyo) and Hisato Akimoto (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for producing a polycarbonate copolymer which has siloxane constituent units represented by any of formulae (1-1)' to (1-4)' and prescribed polycarbonate constituent units, the method having a polymerization step for polymerizing a silane-based compo...