| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a curable composition for optical information medium which is excellent in hardness, warpage resistance, light resistance, and corrosion resistance. <P>SOLUTION: The curable composition for optical information medium contains: 15-80 percent by weight of urethane (meth) acrylate (A) [100 percent by weight of a resin component] obtained by the reaction of an alicyclic-skeleton isocyanate compound (a1) having two or more isocyanate groups, polyol (a2) represented by formula (1), and a compound (a3) comprising a hydroxyl group and a (meth) acryloyloxy group; an alicyclic-skeleton compound (B) comprising a (meth) acryloyloxy group; a non-water-soluble (meth) acryloyloxy compound (C) where ΔHz of a solubility test 1 is 10 or more; and a photopolymerization initiator (E). In formula (1), R is an alkylene oxide group, and m+n is 0 to 15. In solubility test 1, a 0.3 ml of a specimen is dropped onto a PC substrate, to calculate a difference ΔHz between a haze value after wiping at 20°C for 10 minutes and a haze value before the test. <P>COPYRIGHT: (C)2011,JPO&INPIT |
