| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a resin composition formable of a molding for optical use, which has such heat resistance that distortion etc., do not occur when exposed to high temperature environment for a long period of time, high transparency to efficiently guide LED light, low hardness, and flexibility, and a molding for optical use obtained by using the same. <P>SOLUTION: A two-component heat-curable urethane resin composition for optical use contains: a urethane prepolymer (1) having an isocyanate group at the molecular terminal, which is obtained by the reaction of polyol (A) with an aliphatic ring structure-containing polyisocyanate (B); and a curing agent (2) containing low molecular weight diol (C) and low molecular weight triol (D), wherein the weight ratio of the low molecular weight diol (C) to the low molecular weight triol (D) is 40/60 to 95/5. <P>COPYRIGHT: (C)2012,JPO&INPIT |
