| 摘要 |
PROBLEM TO BE SOLVED: To provide a novel α,&bgr;-unsaturated carbonyl modified polymer satisfying demands for a high molecular weight and high viscosity, and to provide an energy ray-curable resin composition using the polymer.SOLUTION: A multimerized polymer is provided comprising polyols (a-1) having a number average molecular weight of 1000 to 20000 connected by at least one bond selected from a group consisting of a urethane bond, an ester bond and an ether bond, in which a molecular chain terminal of the multimerized polymer is modified with an α,&bgr;-unsaturated carbonyl group. |
