| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a curable composition, which has low volatility, allows easy quality control, and is useful for a light transmission layer of an optical information medium hardly causing a warp even when left at low temperature, and to provide a cured product obtained by curing the curable composition and the optical information medium using the cured product as the light transmission layer. <P>SOLUTION: The curable composition possesses a specific urethane (meth)acrylate (A), a (meth)acrylate (B) exhibiting viscosity of 1,000 mPa s or less at 25°C and having two or more (meth)acryloyl groups in the molecule, and a (meth)acrylate (C) having a cyclic skeleton, one (meth)acryloyl group in the molecule, and weight-average molecular weight of 200 or more. The cured product of the curable composition is also provided. In the optical information medium, an information recording layer is formed on a support base, and the light transmission layer is disposed on the information recording layer. In use of the optical information medium, through the light transmission layer, at least one of a recording ray and a reproducing ray enters. The optical information medium, the cured product is used as the light transmission layer. <P>COPYRIGHT: (C)2010,JPO&INPIT |
