Title:
OPTICAL DISK AND ULTRAVIOLET-CURABLE COMPOSITION FOR OPTICAL DISK
Document Type and Number:
WIPO Patent Application WO/2007/136003
Kind Code:
A1
Abstract:
Disclosed is an optical disk wherein at least a light-reflecting layer and a light-transmitting layer are formed on a substrate, and recording or reproduction is performed by a laser light through the light-transmitting layer. The light-transmitting layer is composed of a cured product of an ultraviolet-curable composition containing an epoxy acrylate resin which is obtained by reacting a half-ester compound (A) obtained from a lactone adduct (a1) of a hydroxyalkyl (meth)acrylate and a dibasic acid anhydride (a2) with an epoxy resin (B). The light-transmitting layer has a film thickness of 50-150 μm.
Inventors:
ITO DAISUKE (JP)
Application Number:
PCT/JP2007/060259
Publication Date:
November 29, 2007
Filing Date:
May 18, 2007
Export Citation:
Assignee:
DAINIPPON INK & CHEMICALS (JP)
ITO DAISUKE (JP)
ITO DAISUKE (JP)
International Classes:
G11B7/254; C08F290/06; C08G59/20; C08G59/62; C09D163/10; G11B7/24; G11B7/2542; G11B7/257; G11B7/258; G11B7/259
Foreign References:
| JP2003105230A | 2003-04-09 | |||
| JP2003206449A | 2003-07-22 | |||
| JPH11191240A | 1999-07-13 | |||
| JP2002092948A | 2002-03-29 | |||
| JP2003119231A | 2003-04-23 | |||
| JP2003206449A | 2003-07-22 | |||
| US5904795A | 1999-05-18 |
Other References:
"Nikkei Electronics", 9 August 1999, NIKKEI BUSINESS PUBLICATIONS, INC., pages: 47 - 53
See also references of EP 2020656A4
See also references of EP 2020656A4
Attorney, Agent or Firm:
SHIGA, Masatake et al. (YaesuChuo-ku, Tokyo 53, JP)
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