| abstract |
An actinic ray curable composition for casting polymerization which comprises: n (A) 40-90 parts by weight of an urethane poly(meth)acrylate having at least two (meth)acryloyl groups in one molecule, n (B) 10-60 parts by weight of a radical polymerizable vinyl monomer having a boiling point of 100° C. or higher, and n (C) 0.005-5 parts by weight, per 100 parts by weight of total of the above components (A) and (B), of at least one member selected from methylphenyl glyoxylate, 2-hydroxy-2-methyl-1-phenylpropane-1-one, hydroxycyclohexyl phenyl ketone and a photo-initiator represented by the general formula (I): ##STR1## (wherein R 1 and R 2 which may be identical or different each represents a phenyl group, a methoxy group, an ethoxy group or an isopropyloxy group) and a casting polymerization molded product obtained by radical polymerization of said composition by irradiation with actinic ray. |