| 摘要 |
PROBLEM TO BE SOLVED: To provide a radiation-curable composition that can provide a cured product having properties (excellent mechanical properties, low yellowing degree etc.) necessary for an optical member and a high refractive index. SOLUTION: The radiation-curable composition comprises (a) a structural unit derived from a monothiol containing at least one hydroxy group and one thiol group, (b) a structural unit derived from a polythiol containing at least two thiol groups, (c) a structural unit derived from a compound that is reacted with the thiol group of the structural unit (a) and the thiol group of the structural unit (b) and connects these two thiol groups, and further, a curable compound prepared by (meth)acrylating a hydroxy group-containing compound having a structure represented by the formula: A-C-[B-C]<SB>n</SB>-A (wherein A, B and C are each the structural unit of (a), (b) or (c)). COPYRIGHT: (C)2009,JPO&INPIT
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