ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,534,557, issued on Jan. 27, was assigned to NIPPON A&L INC. (Osaka, Japan).
"Graft copolymer resin" was invented by Kazuto Akaki (Niihama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A graft copolymer resin obtainable by graft-polymerizing a vinyl monomer comprising a vinyl cyanide monomer and an aromatic vinyl monomer to a rubbery polymer, in which a free resin contained in the graft copolymer resin comprises 10 to 35% by mass of a constituent unit derived from a (meth)acrylic acid alkyl ester having an alkyl group containing 4 or more carbon atoms, based on the total amount of the free resins, and the graft copolymer resin satisfies at least ...