| 摘要 |
An ultraviolet-curable composition for an optical disk intermediate layer includes a urethane (meth)acrylate (a) having three or more radical-polymerizable unsaturated bonds, a (meth)acrylate (b) having four or more radical-polymerizable unsaturated bonds which is other than the urethane (meth)acrylate (a), and a monofunctional alicyclic (meth)acrylate (c), wherein a B-type viscosity at 25°C is not more than 1,000 mPa·s. Even when a low-cost general-purpose resin such as a polycarbonate is used as a stamper, deformation or loss of the uneven pattern shape or cracking of the disk is very unlikely, meaning the ultraviolet-curable composition is very useful for the intermediate layers of optical disks.
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