Westerman, Hattori, Daniels & Adrian, LLP
Pressure-sensitive adhesive composition for optical film, pressure-sensitive adhesive layer for optical film, pressure-sensitive adhesive optical film, and image display device
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.
NITTO DENKO CORPORATION
Y G C Y C Y C
Y10T G02F C09J Y10T C08F Y10T C08F
additional additional inventional additional inventional additional inventional
Toshitaka Kunihiro Toshitsugu Takeharu Tomohiro Takaaki Masayuki Takashi Taiki Kenichi Shusaku Yousuke Minoru
Takahashi Inui Hosokawa Kitagawa Mori Ishii Satake Kamijo Shimokuri Okada Goto Makihata Miyatake