| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a curable resin composition for an optical disk, which is highly transparent, can achieve recording/reproduction with high reliability, and has excellent long-term storage stability (which has excellent low-warpage properties in a storage test under a high-temperature environment or a low-temperature environment, has low film-remaining properties under a high-temperature environment, and rarely causes permanent deformation such as dents), in an optical disk (e.g. a Blu-ray Disc (R)) which has a reflective film to reflect laser light for reading information onto a substrate and a protective layer (a transparent cover layer) with thickness of 20-150 μm on the reflective film; and to provide an optical disk in which the curable resin composition is used as a protective layer. <P>SOLUTION: The curable resin composition includes: (a) 30-70 mass% of a polyfunctional (meth)acrylate of an alkylene oxide addition product of a polyfunctional alcohol and/or a polyfunctional (meth)acrylate of a caprolactone addition product of a polyfunctional alcohol; (b) 20-60 mass% of an oligomer and/or a polymer having a radical polymerizable group; and (c) a photo-polymerization initiator. <P>COPYRIGHT: (C)2010,JPO&INPIT |
