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:
Apr. 23, 2019
Filed:
May. 16, 2011
Kunihiro Inui, Ibaraki, JP;
Toshitsugu Hosokawa, Ibaraki, JP;
Takaaki Ishii, Ibaraki, JP;
Masayuki Satake, Ibaraki, JP;
Kenichi Okada, Ibaraki, JP;
Toshitaka Takahashi, Ibaraki, JP;
Yousuke Makihata, Ibaraki, JP;
Taiki Shimokuri, Ibaraki, JP;
Shusaku Goto, Ibaraki, JP;
Takeharu Kitagawa, Ibaraki, JP;
Minoru Miyatake, Ibaraki, JP;
Tomohiro Mori, Ibaraki, JP;
Takashi Kamijo, Ibaraki, JP;
Kunihiro Inui, Ibaraki, JP;
Toshitsugu Hosokawa, Ibaraki, JP;
Takaaki Ishii, Ibaraki, JP;
Masayuki Satake, Ibaraki, JP;
Kenichi Okada, Ibaraki, JP;
Toshitaka Takahashi, Ibaraki, JP;
Yousuke Makihata, Ibaraki, JP;
Taiki Shimokuri, Ibaraki, JP;
Shusaku Goto, Ibaraki, JP;
Takeharu Kitagawa, Ibaraki, JP;
Minoru Miyatake, Ibaraki, JP;
Tomohiro Mori, Ibaraki, JP;
Takashi Kamijo, Ibaraki, JP;
NITTO DENKO CORPORATION, Ibaraki-shi, JP;
Abstract
An aqueous dispersion-type pressure-sensitive adhesive composition for an optical film includes a emulsion particles of a core-shell structure, wherein the emulsion particles include a (meth)acryl-based copolymer (A) having a glass transition temperature of −55° C. to 0° C. and a (meth)acryl-based copolymer (B) having a glass transition temperature of 0° C. to 180° C., in a single emulsion particle, one of the copolymers (A) and (B) forms a core layer, and another forms a shell layer, at least one of the copolymers (A) and (B) contains a carboxyl group-containing monomer, a difference of the glass transition temperatures between the copolymers (A) and (B) is 50° C. or more, and a ratio (A)/(B) (by weight) is in the range of 50/50 to 90/10.