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Patent Searching and Data


Title:
OPTICAL LAMINATE, POLARIZING PLATE COMPOSITE, AND IMAGE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/066830
Kind Code:
A1
Abstract:
This optical laminate comprises a first optical layer, a first adhesive layer comprising a cured active energy ray curable adhesive, and a second optical layer, in said order. The first optical layer is a liquid crystal layer having a surface on the first adhesive layer side that comprises a liquid crystal compound. The active energy ray curable adhesive includes a curable component and a cationic polymerization initiator. The curable component: includes 10–90 parts by mass of a polyfunctional aromatic epoxy compound having a viscosity at 25° of no more than 30 Pa·s, when the total volume is considered 100 parts by mass; and can include an alicyclic epoxy compound or a monofunctional epoxy compound. The aliphatic epoxy compound content is less than 25 parts by mass and the monofunctional epoxy compound content is less than 20 parts by mass. The first adhesive layer has a refractive index at a wavelength of 589 nm of at least 1.53.

Inventors:
FUJITA MASAHIRO (JP)
NAGAYASU SATOSHI (JP)
LEE JEONGEUN (JP)
Application Number:
PCT/JP2019/036741
Publication Date:
April 02, 2020
Filing Date:
September 19, 2019
Export Citation:
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Assignee:
SUMITOMO CHEMICAL CO (JP)
International Classes:
G02B5/30; B32B7/023; B32B27/00; B32B27/16; B32B27/38; C09J11/06; C09J163/00; C09J163/02; G02F1/13; G09F9/30; H01L27/32; H01L51/50; H05B33/02
Domestic Patent References:
WO2012173055A12012-12-20
Foreign References:
JP2015172132A2015-10-01
JP2018017996A2018-02-01
JP2018141061A2018-09-13
JP2018109143A2018-07-12
JP2014037477A2014-02-27
Attorney, Agent or Firm:
NAKAYAMA, Tohru et al. (JP)
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