Radiation polymerizable mixture containing reaction products of glycerol acrylates and polyisocyanates

Claim 1

A radiation-polymerizable mixture consisting essentially of: (a) from about 20 to 80 weight percent of a polymeric binder soluble in aqueous solutions; (b) from about 0.1 to 20 weight percent of a radiation-activatable polymerization initiator; and (c) from about 20 to 80 weight percent of an acrylate or methacrylate ester of a polyhydric hydroxy compound having at least two urethane groups in the molecule; said ester being a reaction product of glycerol dimethacrylate or glycerol diacrylate and a polyisocyanate; said polyisocyanate being (i) a diisocyanate; (ii) a reaction product of 1 mole of a trihydroxy compound and 3 moles of a diisocyanate, said trihydroxy compound corresponding to one of the following formulas: HO--[C.sub.p H.sub.2p-v (OH).sub.v S--].sub.m-1 C.sub.p H.sub.2p-v (OH).sub.v-1, HO--[C.sub.p H.sub.2p-v (CH).sub.v --O--].sub.m H, and HO--C.sub.s H.sub.2s-v (OH).sub.v --Z(--CO--C.sub.q H.sub.2q --O).sub.m --H; or (iii) a reaction product of a dihydroxy compound with a diisocyanate, said dihydroxy compound corresponding to one of the following formulas: HO--[C.sub.p H.sub.2p --S--].sub.m-1 C.sub.p H.sub.2p (OH), HO--[C.sub.p H.sub.2p --O--].sub.m H, HO--C.sub.s H.sub.2s --Z(--CO--C.sub.q H.sub.2q --O).sub.m --H, and ##STR2## in which formulas for both of said trihydroxy compound and said dihydroxy compound, respectively: R" represents O, S, CR 2 or SO 2 , R represents a hydrogen atom or a methyl group, Z represents O or NR, n represents an integer from 0 to 20, m represents an integer from 1 to 40, p represents an integer from 2 to 20, q represents an integer from 2 to 10, s represents an integer from 2 to 10, and v is 0 or 1, p, q, and s each being at least 2 greater than v.