| 摘要 |
PROBLEM TO BE SOLVED: To provide an active energy ray-curing type resin composition for cast polymerization having good curability, hardly undergoing discoloration, having excellent mechanical strength, and exhibiting a high refractive index. SOLUTION: The active energy ray-curing type resin composition for cast polymerization comprises an epoxy (meth)acrylate, a di(meth)acrylate having an alkylene oxide adduct of bisphenol A, a monofunctional (meth)acrylate, an initiator (d1) having the maximum absorbance of 2.0 or higher between 200 and 400 nm, an absorbance of 0.1 or higher at 400 nm, and the maximum absorbance of 0.05 or lower between 450 and 800 nm, and an initiator (d2) having the maximum absorbance of 2.0 or higher between 200 and 400 nm, an absorbance of lower than 0.1 at 400 nm, and the maximum absorbance of 0.05 or lower between 450 and 800 nm, wherein the total content of (d1) and (d2) is 0.1% by weight or more based on the weight of the composition and the content of (d1) ranges from 0.05 to 3% by weight based on the weight of the composition. COPYRIGHT: (C)2007,JPO&INPIT
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