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Title:
PRESSURE-SENSITIVE ADHESIVE COMPOSITON FOR OPTICAL FILTER, OPTICAL FILTER, AND DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2008/038794
Kind Code:
A1
Abstract:
This invention provides a pressure-sensitive adhesive composition which, while realizing, in a single layer, an adhesive property high enough to realize direct application onto a glass plate disposed on the front face of a display device and a desired optical filter function, is less likely to undergo a change in spectral characteristics attributable to a deterioration in a light absorbing agent even after long-term use particularly under high-temperature and high-humidity conditions, and an optical filter comprising the pressure-sensitive adhesive composition. The optical filter comprises a pressure-sensitive adhesive layer having an optical filter function. The pressure-sensitive adhesive layer comprises a block copolymer (I), a resin (IV), and at least one light absorbing agent (III). The block copolymer (I) is a block copolymer having at least a specific triblock structure in its molecule and has a weight average molecular weight of not less than 50,000 and a molecular weight distribution (Mw/Mn) of less than 1.5. The resin (IV) has a glass transition temperature of 60°C or above. The light absorbing agent (III) has light absorption in a predetermined wavelength range.

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Inventors:
HIWATASHI YUKA (JP)
YOSHIHARA TOSHIO (JP)
YAMASHITA YUDAI (JP)
OHTAKI HIROYUKI (JP)
Application Number:
PCT/JP2007/069063
Publication Date:
April 03, 2008
Filing Date:
September 28, 2007
Export Citation:
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Assignee:
DAINIPPON PRINTING CO LTD (JP)
HIWATASHI YUKA (JP)
YOSHIHARA TOSHIO (JP)
YAMASHITA YUDAI (JP)
OHTAKI HIROYUKI (JP)
International Classes:
G02B5/22; C09J7/02; C09J11/06; C09J153/00
Domestic Patent References:
WO2005080453A12005-09-01
WO2006090705A12006-08-31
WO2006023143A12006-03-02
Foreign References:
JP2005307063A2005-11-04
JP2005107199A2005-04-21
JP2007084658A2007-04-05
JP2007231067A2007-09-13
JP2007177102A2007-07-12
Attorney, Agent or Firm:
KISHIMOTO, Tatsuhito et al. (3rd Floor Oak Building Kyobashi, 16-10, Kyobashi 1-chome, Chuou-k, Tokyo 31, JP)
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