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:
Mar. 05, 2013
Filed:
Jun. 29, 2012
Takashi Shimizu, Ibaraki, JP;
Toshitsugu Hosokawa, Ibaraki, JP;
Masayuki Satake, Ibaraki, JP;
Nitto Denko Corporation, Ibaraki-shi, Osaka, JP;
Abstract
There is provided a method for separating an optical film bonded to an adherend with a pressure-sensitive adhesive layer interposed therebetween from the adherend. The pressure-sensitive adhesive layer is formed using an optical pressure-sensitive adhesive. The optical pressure-sensitive adhesive of the invention comprises a base polymer having a functional group (F); and a coupling agent that has a benzyl ester group and is represented by Formula (1): wherein Aand Aare different functional groups, one of Aand Ashows reactivity or interaction with the functional group (F) of the base polymer, Ris an optionally substituted alkylene group of 1 to 12 carbon atoms and/or an optionally substituted phenylene group, and Rand Rare each a hydrogen atom or an alkyl group of 1 to 12 carbon atoms and may be the same or different.