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. 03, 2016
Filed:
Nov. 15, 2011
Noriko Kiyoyanagi, Tokyo, JP;
Masataka Nakanishi, Tokyo, JP;
Yoshihiro Kawata, Tokyo, JP;
Junko Ichikawa, Tokyo, JP;
Toru Kurihashi, Tokyo, JP;
Noriko Kiyoyanagi, Tokyo, JP;
Masataka Nakanishi, Tokyo, JP;
Yoshihiro Kawata, Tokyo, JP;
Junko Ichikawa, Tokyo, JP;
Toru Kurihashi, Tokyo, JP;
Nippon Kayaku Kabushiki Kaisha, Tokyo, JP;
Abstract
An epoxy resin composition for optical sheets, the composition comprising a polyvalent carboxylic acid (A) represented by formula (I): wherein R's each independently represent a hydrogen atom, an alkyl group having 1 to 15 carbon atoms, or a carboxyl group; q represents the number of substituent R's, and represents an integer from 1 to 4; and P represents the following X: wherein there may be a plural number of R's per ring, and R's each independently represent a hydrogen atom or a methyl group; and * represents a bonding site linked to the oxygen atom; and an epoxy resin (B) having an aliphatic cyclic structure in the molecule.