The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 27, 2019
Filed:
Sep. 01, 2017
Kaneka Corporation, Osaka, JP;
Fuminobu Kitayama, Hyogo, JP;
Nobuyoshi Maizuru, Hyogo, JP;
Mitsuru Nakamura, Hyogo, JP;
Haruki Koyama, Osaka, JP;
KANEKA CORPORATION, Osaka, JP;
Abstract
A resin composition includes an acrylic resin and a graft copolymer having a gel content of 65% to 84%, wherein the graft copolymer is a multistage-polymerized graft copolymer obtained by a multistage polymerization including the polymerization stages (I) to (III). In the polymerization stage (I), a first monomer mixture and a polyfunctional monomer are polymerized in a presence of a primary alkyl mercaptan-based chain transfer agent and/or a secondary alkyl mercaptan-based chain transfer agent to obtain a first hard polymer. In the polymerization stage (II), a second monomer mixture and a polyfunctional monomer are polymerized to obtain a soft polymer. In the polymerization stage (III), a third monomer mixture and a polyfunctional monomer are polymerized to obtain a second hard polymer.