Invention Grant
US09029468B2 Adhesive layer for optical film, optical film having adhesive layer, image display device, and detachment method for optical film
有权
用于光学膜的粘合剂层,具有粘合剂层的光学膜,图像显示装置和用于光学膜的剥离方法
- Patent Title: Adhesive layer for optical film, optical film having adhesive layer, image display device, and detachment method for optical film
- Patent Title (中): 用于光学膜的粘合剂层,具有粘合剂层的光学膜,图像显示装置和用于光学膜的剥离方法
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Application No.: US13988631Application Date: 2011-11-18
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Publication No.: US09029468B2Publication Date: 2015-05-12
- Inventor: Kunihiro Inui , Toshitsugu Hosokawa , Takaaki Ishii , Masayuki Satake , Kenichi Okada , Toshitaka Takahashi , Taiki Shimokuri , Yousuke Makihata
- Applicant: Kunihiro Inui , Toshitsugu Hosokawa , Takaaki Ishii , Masayuki Satake , Kenichi Okada , Toshitaka Takahashi , Taiki Shimokuri , Yousuke Makihata
- Applicant Address: JP Ibaraki-shi
- Assignee: Nitto Denko Corporation
- Current Assignee: Nitto Denko Corporation
- Current Assignee Address: JP Ibaraki-shi
- Agency: Westerman, Hattori, Daniels & Adrian, LLP
- Priority: JP2010-262703 20101125; JP2011-225032 20111012
- International Application: PCT/JP2011/076677 WO 20111118
- International Announcement: WO2012/070494 WO 20120531
- Main IPC: B32B38/10
- IPC: B32B38/10 ; C09J133/08 ; C09J7/02 ; C08L33/02 ; C09J133/04 ; G02F1/1335 ; C09D133/08 ; C09J7/00 ; C08K3/36

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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