The invention provides a cation polymerizable resin composition excellent in curing properties and corrosion resistance with less resin coloration and less cure shrinkage, which is a material suitable as a surface protective material for optical disk. Specifically, the cation polymerizable resin composition comprises an epoxy compound (A) as an essential ingredient represented by formula 1 wherein R1 and R2 each represent a saturated or unsaturated carbon atom, and R3 represents a hydrogen atom or a saturated or unsaturated carbon atom, a cation polymerizable compound (B) other than the epoxy compound represented by formula 1, a photo cation polymerization initiator (C) and a photo radical polymerization initiator (D).
本发明提供了一种固化性能和耐腐蚀性能优异、
树脂着色少、固化收缩小的阳离子可聚合
树脂组合物,它是一种适用于光盘表面保护材料的材料。具体地说,阳离子可聚合
树脂组合物包括作为基本成分的环氧化合物(A)(由式 1 表示,其中 R1 和 R2 分别代表饱和或不饱和碳原子,R3 代表氢原子或饱和或不饱和碳原子)、除式 1 所示环氧化合物以外的阳离子可聚合化合物(B)、光阳离子聚合
引发剂(C)和光自由基聚合
引发剂(D)。