| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical disk which suppresses the remarkable decrease of a reflectance and the occurrence of PI errors as much as possible without discoloration of a reflective film made of silver or an alloy mainly composed of silver even when being exposed with sunlight or a fluorescent light, and to provide an active energy ray-curable composition, producing the disk. <P>SOLUTION: The composition contains a photopolymerization initiator expressed by formula (1) or (2), and a compound expressed by formula (3). In formula (3), R<SP>9</SP>, R<SP>10</SP>, R<SP>11</SP>, R<SP>12</SP>and R<SP>13</SP>are each independently (i) a hydrogen atom, (ii) a halogen atom, (iii) a hydroxy group, (iv) 1-8C alkoxyl group, (v) a carboxyl group, (vi) a group expressed by formula (4) or (vii) 1-24C alkyl or alkenyl group which may have a carboxyl group, an alkoxycarbonyl group, an acyloxy group or an alkoxyl group as a substituent, where at least one of R<SP>9</SP>, R<SP>10</SP>, R<SP>11</SP>, R<SP>12</SP>and R<SP>13</SP>is a hydroxy group. <P>COPYRIGHT: (C)2007,JPO&INPIT |
