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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.:

US 8999503 B1

PDFFull Text
Date of Patent:
Apr. 07, 2015

Filed:

Oct. 20, 2010

Thermally removable pressure-sensitive adhesive sheet

Applicants:

Hitoshi Takahira, Osaka, JP;

Satomi Yoshie, Osaka, JP;

Inventors:

Hitoshi Takahira, Osaka, JP;

Satomi Yoshie, Osaka, JP;

Assignee:

Nitto Denko Corporation, Osaka, JP;

Attorney:

Greenblum & Bernstein, P.L.C.

Primary Examiner:

Frank D Ducheneaux

Int. Cl.
CPC ...
C08G 63/08 (2006.01); C08G 63/16 (2006.01); C09J 167/04 (2006.01); C09J 175/06 (2006.01); C09J 5/06 (2006.01); C09J 5/08 (2006.01); C09J 167/00 (2006.01); B32B 7/06 (2006.01); B32B 7/12 (2006.01); B32B 27/36 (2006.01); C08G 63/60 (2006.01); C09J 7/02 (2006.01); C08G 18/79 (2006.01); C08G 18/42 (2006.01);
U.S. Cl.
CPC ...
C09J 167/00 (2013.01); B32B 7/06 (2013.01); B32B 7/12 (2013.01); B32B 27/36 (2013.01); C08G 63/60 (2013.01); C09J 5/06 (2013.01); C09J 7/0246 (2013.01); C09J 2205/11 (2013.01); C09J 2205/302 (2013.01); C09J 2467/00 (2013.01); C08G 18/791 (2013.01); C08G 18/4202 (2013.01); C08G 18/428 (2013.01); C09J 175/06 (2013.01); C08G 2170/40 (2013.01); C08G 2170/60 (2013.01);
Abstract

A thermally removable pressure-sensitive adhesive sheet includes a substrate and a pressure-sensitive adhesive layer that is provided on at least one side of the substrate and made from a polyester-based pressure-sensitive adhesive composition containing a polyester including at least a lactic acid unit, a dibasic acid unit, and a glycol unit, a foaming agent, and a crosslinking agent. The dibasic acid unit includes a dimer acid, the polyester has a weight average molecular weight of 20,000 to 200,000 and a glass transition temperature of −70 to −20° C. as measured using a differential scanning calorimeter at a temperature rise rate of 20° C./minute, and the polyester has a hydroxyl value of 1 to 60 mgKOH/g.

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