| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical disk in which recording and reproduction is performed by a laser beam through a light transmissive layer and a light reflective layer is not corroded and also the occurrence of warpage is suppressed as much as possible. <P>SOLUTION: In the optical disk, the light reflective layer is a reflective layer composed of silver or an alloy containing as a main component silver, and the light transmissive layer is a layer formed by using a cured film of a UV curing composition containing: (A) a compound represented by formula (I); and (B) a compound obtained by reacting (i) a compound represented by formula (II) and having a molecular weight of 50 to 4,000, (ii) a diisocyanate compound and (iii) a compound having one hydroxyl group and one (meth)acryloyl oxy group in one molecule and the light transmissive layer has ≤700 MPa elastic modulus at 30°C. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
