| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a curable composition which has a low curing shrinkage rate, when polymerized, and gives a cured product having excellent transparency, excellent heat resistance, and good mold releasability from a mold. <P>SOLUTION: This curable composition comprises (A) a urethane (meth)acrylate obtained by reacting (a) diol selected from polyetherdiols, polyesterdiols and polycarbonatediols with (a2) a diisocyanate compound and (a3) a hydroxy group-containing (meth)acrylate, (B) a (meth)acrylate selected from neopentyl glycol hydroxypivalate di(meth)acrylate, neopentyl glycol lactone-modified hydroxypivalate di(meth)acrylate, and neopentyl glycol alkylene oxide-modified hydroxypivalate di(meth)acrylate, and (C) a polymerization initiator. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
