| 摘要 |
PURPOSE:To obtain the titled optical disk having high recording sensitivity, density, and reliability by using the material obtained by curing an UV curing resin composition consisting of a specified compd. and a photopolymerization initiator as a substrate layer. CONSTITUTION:The substrate layer having reggedness corresponding to the information signal and a recording film layer are successively formed on a transparent substrate to obtain the optical disk. An UV curing resin composition is obtained by mixing 100pts.wt. mixture consisting of 50-100pts.wt. compd. shown by the general formula (1) and 50-0pts.wt. compd. shown by the general formula (2) and 0.1-5.0pts.wt., based on 100pts.wt. mixture, photopolymerization initiator. The composition is cured, and the cured material is used in the sub strate layer. When <=50pts.wt. compd. shown by the general formula (1) is mixed, the releasability from a stamper and the resistance of the cured material to moisture and heat are deteriorated, the molding strain is increased, and the mechanical strength is decreased. |
