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 (Inc. Saitama Plant, 4472-1, Oaza Komuro, Ina-machi, Kitaadachi-gu, Saitama 77, 3628577, JP)
Application Number:
JP2007/060259
Publication Date:
November 29, 2007
Filing Date:
May 18, 2007
Export Citation:
Assignee:
Dainippon Ink and Chemicals, Inc. (35-58, Sakashita 3-chome Itabashi-k, Tokyo 20, 1748520, JP)
大日本インキ化学工業株式会社 (〒20 東京都板橋区坂下３丁目３５番５８号 Tokyo, 1748520, JP)
大日本インキ化学工業株式会社 (〒20 東京都板橋区坂下３丁目３５番５８号 Tokyo, 1748520, JP)
International Classes:
G11B7/254; C08F290/06; C08G59/20; C08G59/62; C09D163/10; G11B7/24; G11B7/257
Attorney, Agent or Firm:
SHIGA, Masatake et al. (2-3-1, YaesuChuo-ku, Tokyo 53, 1048453, JP)
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