Title:
OPTICAL SHEET
Document Type and Number:
WIPO Patent Application WO/2014/033932
Kind Code:
A1
Abstract:
Provided is an optical sheet having high transparency, suitable elasticity, and excellent toughness, moldability, and productivity. An optical sheet is composed of a curing material for a polymerizable composition containing a bifunctional urethane (meth)acrylate having a number-average molecular weight of 2000 to 50000, a monofunctional vinyl monomer, and a trifucntional vinyl monomer. A polymerizable component having an α,β-ethylenically unsaturated double bond in the polymerizable composition, wherein the number-average molecular weight is 1000 or more in terms of the weighted average per α,β-ethylenically unsaturated double bond. The curing material may be a photo-curing material obtained by the irradiation of an electron beam, or may be a curing material that contains essentially no polymerization initiator. The urethane (meth)acrylate may be an aliphatic urethane (meth)acrylate. This optical sheet is suitable as a key sheet, a light-guide sheet, a reflective sheet, an OCA tape substrate, or the like.
Inventors:
UMEMOTO KOICHI (JP)
YOKOYAMA AYA (JP)
YOKOYAMA AYA (JP)
Application Number:
PCT/JP2012/072251
Publication Date:
March 06, 2014
Filing Date:
August 31, 2012
Export Citation:
Assignee:
DAICEL CORP (JP)
UMEMOTO KOICHI (JP)
YOKOYAMA AYA (JP)
UMEMOTO KOICHI (JP)
YOKOYAMA AYA (JP)
International Classes:
C08J5/18; C08F290/06; G02B5/08
Foreign References:
| JP2003026715A | 2003-01-29 | |||
| JP2003192750A | 2003-07-09 | |||
| JP2006188589A | 2006-07-20 | |||
| JPH09253964A | 1997-09-30 | |||
| JP2011164363A | 2011-08-25 | |||
| JP2012184291A | 2012-09-27 |
Attorney, Agent or Firm:
KUWATA Mitsuo et al. (JP)
Atsuo Kuwata (JP)
Atsuo Kuwata (JP)
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