| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a curable resin composition for an optical disk, which has high transparency, with which recording and reproducing with high reliability are achieved, and which is superior in long term storage stability (low warpage in a preservation test in high and low temperature surroundings, film retention in high temperature surroundings, scarcity of permanent deformation such as recesses), with respect to an optical disk (e.g., Blu-ray Disc (R)) having a reflection film to reflect a laser beam for information reading on a substrate and a protective layer (a transparent cover layer) with thickness of 10-150 μm on the reflection film, and the optical disk using the curable resin composition as the protective layer. <P>SOLUTION: The curable resin composition is used for the optical disk having the reflection film to reflect a laser beam for information reading on the substrate and the protective layer on the reflection film with thickness of 20-150 μm, and contains (a) an oligomer or a polymer which has a radical polymerizable group; (b) a diacrylate which is an alkylene oxide addition product of bisphenol A; (c) a multifuntional acrylate having three or more acryloyl groups; and (d) a photo-polymerization initiator. <P>COPYRIGHT: (C)2010,JPO&INPIT |
