Actinic radiation curable compositions

Claim 1

An actinic radiation curable prepolymeric composition of matter characterized by the presence of terminal unsaturation consisting essentially of the reaction product of: (a) from about 1.0 to about 48.0 mole percent of a hydroxyalkyl ester of an alpha, beta unsaturated carboxylic acid, wherein the alkyl group of the ester moiety contains from 2 to 20 carbon atoms, and the acid moiety contains from 3 to 4 carbon atoms; (b) from about 1.0 to about 48.0 mole percent of at least one polymerizable free-radical initiator activatable by actinic radiation and selected from the group consisting of tetrachlorophthalic anhydride, tetrabromophthalic anhydride and 1,4,5,6,7,7-hexachloro-5-norbornene-2,3-dicarboxylic anhydride and mixtures thereof; (c) from about 1.0 to about 48.0 mole percent of at least one nonhalogenated cyclic anhydride containing from 4 to 10 carbon atoms; and (d) from about 1.0 to about 48.0 mole percent of at least one epoxide containing 2 to 8 carbon atoms and selected from the group consisting of epoxyalkyl acrylates and methacrylates and alkylene oxides.