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. 18, 2014
Filed:
Feb. 21, 2007
Junji Yokoyama, Ibaraki, JP;
Yoshikazu Soeda, Ibaraki, JP;
Yutaka Tosaki, Ibaraki, JP;
Koichi Ikeda, Ibaraki, JP;
Junji Yokoyama, Ibaraki, JP;
Yoshikazu Soeda, Ibaraki, JP;
Yutaka Tosaki, Ibaraki, JP;
Koichi Ikeda, Ibaraki, JP;
Nitto Denko Corporation, Osaka, JP;
Abstract
The present invention relates to a pressure-sensitive adhesive tape or sheet having a light-reflective property and/or a light-shielding property, which includes a base material and at least one pressure-sensitive adhesive layer disposed on at least one surface of the base material. The pressure-sensitive adhesive layer is formed by an acrylic pressure-sensitive adhesive composition containing an acrylic polymer (a) and a low-molecular weight polymer component (b) which contains, as a principal monomer component, an ethylenic unsaturated monomer having a glass transition temperature of from 60 to 190° C. when it is formed into a homopolymer and having a cyclic structure within the molecule thereof, and which has a weight-average molecular weight equal to or higher than 3,000 but lower than 20,000. The pressure-sensitive adhesive layer has a gel fraction of from 51 to 75 wt % and a temperature, at a maximum of loss tangent (tan δ), of from −14 to 25° C.