Radiation-curable compositions containing hydroxy-terminated polyurethanes and an epoxy compound

A radiation-curable composition comprising an epoxy compound, a hydroxy-terminated polyurethane and a photoinitiator wherein the hydroxy-terminated polyurethane is prepared by the reaction of at least one compound selected from the group consisting of polyesters and polyethers having a molecular weight of about 300 to about 10,000 and having at least two hydroxy groups with less than molar amounts of a low molecular weight diisocyante in a molar ratio of hydroxy group to isocyanate group ranging from about 1.01:1.00 to 3:1.