ACTIVE ENERGY RAY-CURABLE URETHANE (METH)ACRYLATE, ACTIVE ENERGY RAY-CURABLE COMPOSITION CONTAINING THE SAME AND FUNCTIONAL MEMBER USING THEM

摘要

PROBLEM TO BE SOLVED: To provide an active energy ray-curable urethane (meth)acrylate capable of preventing the obtained cured product from being deformed; to provide an active energy ray-curable composition containing the urethane (meth)acrylate; and to provide a functional member using them. SOLUTION: The active energy ray-curable urethane (meth)acrylate is obtained by reacting an organic isocyanate having two or more isocyanate groups in one molecule with a polyalkylene glycol (meth)acrylate. The alkylene glycol of the polyalkylene glycol (meth)acrylate is a 2-4C glycol, and the number of the repeating units thereof is 2.5-11 expressed in terms of ethylene glycol. Preferably, the hydroxy group of the alkylene glycol is a primary hydroxy group, and the number of the repeated units is 3-6 expressed in terms of ethylene glycol. COPYRIGHT: (C)2005,JPO&NCIPI