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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 9029468 B1

PDFFull Text
Date of Patent:
May. 12, 2015

Filed:

Nov. 18, 2011

Adhesive layer for optical film, optical film having adhesive layer, image display device, and detachment method for optical film

Applicants:

Kunihiro Inui, Ibaraki, JP;

Toshitsugu Hosokawa, Ibaraki, JP;

Takaaki Ishii, Ibaraki, JP;

Masayuki Satake, Ibaraki, JP;

Kenichi Okada, Ibaraki, JP;

Toshitaka Takahashi, Ibaraki, JP;

Taiki Shimokuri, Ibaraki, JP;

Yousuke Makihata, Ibaraki, JP;

Inventors:

Kunihiro Inui, Ibaraki, JP;

Toshitsugu Hosokawa, Ibaraki, JP;

Takaaki Ishii, Ibaraki, JP;

Masayuki Satake, Ibaraki, JP;

Kenichi Okada, Ibaraki, JP;

Toshitaka Takahashi, Ibaraki, JP;

Taiki Shimokuri, Ibaraki, JP;

Yousuke Makihata, Ibaraki, JP;

Assignee:

Nitto Denko Corporation, Ibaraki-shi, JP;

Attorney:

Westerman, Hattori, Daniels & Adrian, LLP

Primary Examiner:

Michael M Bernshteyn

Int. Cl.
CPC ...
B32B 38/10 (2006.01); C09J 133/08 (2006.01); C09J 7/02 (2006.01); C08L 33/02 (2006.01); C09J 133/04 (2006.01); G02F 1/1335 (2006.01); C09D 133/08 (2006.01); C09J 7/00 (2006.01); C08K 3/36 (2006.01);
U.S. Cl.
CPC ...
C09J 133/08 (2013.01); C09J 133/04 (2013.01); G02F 1/1335 (2013.01); B32B 38/10 (2013.01); C09J 7/0217 (2013.01); C09D 133/08 (2013.01); C09J 7/00 (2013.01); G02F 1/133528 (2013.01); G02F 2202/28 (2013.01); C08K 3/36 (2013.01); C09J 2205/102 (2013.01); C08L 2201/54 (2013.01); C09J 2201/606 (2013.01); C09J 2201/622 (2013.01); C09J 2203/318 (2013.01); C09J 2433/00 (2013.01);
Abstract

A pressure-sensitive adhesive layer for an optical film made from an aqueous dispersion-type pressure-sensitive adhesive composition, wherein the aqueous dispersion-type pressure-sensitive adhesive composition is an aqueous dispersion comprising a water-dispersible (meth)acryl-based copolymer (A) having a glass transition temperature from −55° C. to less than 0° C.; and a water-soluble or water-dispersible component (B) having a glass transition temperature of 0° C. or more, a mixture ratio (A)/(B) is in the range of 50-97/3-50, the component (B) forms domains with maximum lengths between 1 nm and 200 nm in a resin component made of the (meth)acryl-based copolymer (A), and the pressure-sensitive adhesive layer has a haze value (H20) of 1% or less when having a thickness of 20 μm. The pressure-sensitive adhesive layer for an optical film, which is made from an aqueous dispersion-type pressure-sensitive adhesive composition has good reworkability or recyclability, and has a sufficient level of durability.

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