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:
May. 10, 2011
Filed:
Apr. 24, 2008
Yutaka Moroishi, Ibaraki, JP;
Fumiko Nakano, Ibaraki, JP;
Tetsuo Inoue, Ibaraki, JP;
Yoshihide Kawaguchi, Ibaraki, JP;
Kohei Yano, Ibaraki, JP;
Yutaka Moroishi, Ibaraki, JP;
Fumiko Nakano, Ibaraki, JP;
Tetsuo Inoue, Ibaraki, JP;
Yoshihide Kawaguchi, Ibaraki, JP;
Kohei Yano, Ibaraki, JP;
Nitto Denko Corporation, Osaka, JP;
Abstract
Provided are a pressure sensitive adhesive composition for optical members and a pressure sensitive adhesive composition for optical members. The pressure sensitive adhesive composition for optical members according to the present invention comprises 100 parts by weight of an acrylic polymer (A) having a weight-average molecular weight of 500,000 or more, containing at least 50 wt % alkyl (meth)acrylate having an alkyl group with 5 or more carbon atoms and 0.2 to 2 wt % unsaturated carboxylic acid as the monomer unit, 0.1 to 4 parts by weight of an acrylic polymer (B) having a weight-average molecular weight of 2,000 to 50,000, containing at least 70 wt % alkyl (meth)acrylate and 1 to 7 wt % unsaturated carboxylic acid as the monomer unit and having a higher carboxylic acid equivalent than that of the acrylic polymer (A), 0.01 to 1 part by weight of a silane coupling agent, and a crosslinking agent.