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. 06, 2013
Filed:
Oct. 14, 2009
Toshihide Suzuki, Ibaraki, JP;
Kenichi Yamamoto, Ibaraki, JP;
Akiko Takahashi, Ibaraki, JP;
Yutaka Tosaki, Ibaraki, JP;
Shouhei Wada, Ibaraki, JP;
Toshihide Suzuki, Ibaraki, JP;
Kenichi Yamamoto, Ibaraki, JP;
Akiko Takahashi, Ibaraki, JP;
Yutaka Tosaki, Ibaraki, JP;
Shouhei Wada, Ibaraki, JP;
Nitto Denko Corporation, Ibaraki-shi, JP;
Abstract
The present invention provides a water-dispersed acrylic PSA composition suitable for forming a PSA sheet. The PSA composition contains 100 parts by weight of an acrylic copolymer with a Tg of −70° C. to −50° C. obtained by polymerization of a monomer starting material containing 60 wt % or more of an alkyl (meth)acrylate with a Calkyl group and 5 wt % or less of a radical polymerizable monomer with a carboxyl group. When an adhesive sheet is formed therefrom, it exhibits an average SUS adhesive strength of 11 N/20 mm or greater, PP adhesive strength of 8.5 N/20 mm or greater, 80° C. hold time of 1 hour or longer, and gap height of 10 mm or less in a curved surface adhesion test.