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Title:
ADHESIVE COMPOSITION FOR POLARIZING PLATES AND POLARIZING PLATE HAVING ADHESIVE LAYER
Document Type and Number:
WIPO Patent Application WO/2016/072197
Kind Code:
A1
Abstract:
[Problem] To provide an adhesive composition for polarizing plates, suitable for configurations whereby at least one polarizer protective film normally formed on both surfaces of a polarizer is omitted and whereby an adhesive layer can be formed that has excellent durability. [Solution] An adhesive composition for polarizing plates, containing: a (meth) acrylic copolymer (A) having a weight-average molecular weight as measured by gel permeation chromatography of no more than 600,000, having a glass transition temperature of -80-0°C, and being obtained by copolymerization of monomer components including 10%-30% by mass of a (meth) acrylate alkyl ester (a1) having a homopolymer glass transition temperature of at least 0°C and 0.1%-5% by mass of a crosslinking functional group-containing monomer (a2) containing a hydroxyl group-containing monomer and a carboxyl group-containing monomer; and an isocyanate-based crosslinking agent (B). The adhesive composition for polarizing plates is characterized by: containing 10-40 parts by mass isocyanate-based crosslinking agent (B) relative to 100 parts by mass copolymer (A); and by being used to form an adhesive layer that comes in direct contact with polarizers.

Inventors:
YONEKAWA, Yuya (13-1, Hirosehigashi 1-chome, Sayama-sh, Saitama 20, 〒3501320, JP)
TANAKA, Ryusuke (13-1, Hirosehigashi 1-chome, Sayama-sh, Saitama 20, 〒3501320, JP)
Application Number:
JP2015/078302
Publication Date:
May 12, 2016
Filing Date:
October 06, 2015
Export Citation:
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Assignee:
SOKEN CHEMICAL & ENGINEERING CO., LTD. (29-5, Takada 3-chome Toshima-k, Tokyo 31, 〒1718531, JP)
International Classes:
G02B5/30; B32B27/00; C09J7/00; C09J7/02; C09J133/06; C09J175/04
Domestic Patent References:
WO2011062127A12011-05-26
Foreign References:
JP2010196003A2010-09-09
JP2012128099A2012-07-05
JPH05297220A1993-11-12
JP2014164052A2014-09-08
JP2010048889A2010-03-04
Attorney, Agent or Firm:
SSINPAT PATENT FIRM (Gotanda Yamazaki Bldg. 6F, 13-6 Nishigotanda 7-chome, Shinagawa-k, Tokyo 31, 〒1410031, JP)
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