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. 18, 2020
Filed:
Sep. 21, 2018
Kaneka Corporation, Osaka, JP;
Mitsuru Nakamura, Hyogo, JP;
Fuminobu Kitayama, Hyogo, JP;
KANEKA CORPORATION, Osaka, JP;
Abstract
A graft copolymer includes: an inner layer made of a hard polymer (I) obtained by polymerizing a monomer mixture including 40 to 100 wt % of a methacrylate ester 0 to 15 wt % of an aromatic vinyl monomer, and 0 to 45 wt % of another copolymerizable monomer and 0.01 to 10 parts by weight of a polyfunctional monomer; an intermediate layer made of a soft polymer (II) obtained by polymerizing a monomer mixture including 60 to 100 wt % of an acrylate ester and 0 to 40 wt % of another copolymerizable monomer, 0.01 to 5 parts by weight of allyl (meth)acrylate, and a di(meth)acrylic compound; and an outer layer made of a hard polymer (III) obtained by polymerizing a monomer mixture including 40 to 100 wt % of a methacrylate ester and 60 to 0 wt % of another copolymerizable monomer and 0 to 10 parts by weight of a polyfunctional monomer.