| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical disk which does not cause reduction in adhesive strength or variation in the external appearance of a reflective film before and after the disk is left in a high temperature and high humidity environment for a long time period, does not have an increase in errors in reading signals, and has excellent durability when the disk is exposed to a high temperature and high humidity environment. <P>SOLUTION: The optical disk includes a first reflective film for reflecting laser light for reading information on a first substrate, and a resin layer including a cured film made of an ultraviolet-curable composition on the first reflective film. The ultraviolet-curable composition contains an epoxy acrylate resin obtained by reacting a half ester compound (A) which is obtained from a lactone-adduct of hydroxyalkyl (meth)acrylate (a1) and a dibasic acid anhydride (a2), with an epoxy resin (B). <P>COPYRIGHT: (C)2010,JPO&INPIT |
