Photopolymerizable compositions

Claim 1

A photopolymerizable composition comprising: (1) a thermoplastic high molecular weight binder obtained by copolymerizing: (i) 4 to 40 wt. % of an addition polymerizable monomer (A) containing the carboxyl group; (ii) at least 5 wt. % of an addition polymerizable non-acidic monomer (B) represented by the general formula: ##STR4## wherein R 1 is a hydrogen atom or methyl group; R 2 is an alkylene group having 1 to 5 carbon atoms: R 3 is a hydrogen atom, a halogen atom or an alkyl group having 1 to 5 carbon atoms; and m is an integer of 1 to 20; and (iii) at least an addition polymerizable non-acidic monomer satisfying the following formula: ##EQU2## wherein Q and e are stability and polar values, respectively, as defined by the Alfrey-Price equation, and the symbols A and C correspond to the addition polymerizable monomer (A) and to the addition polymerizable non-acidic monomer (C), respectively; (2) an acrylate or methacrylate ester derivative selected from the compounds of formulae (III), (IV) and (V): ##STR5## wherein R 4 , R 5 , R 6 , R 9 , R 10 and R 11 are the same or different and each is a hydrogen atom or methyl group; R 7 and R 8 are the same or different, and each is a hydrogen atom or a halogen atom; and n and p each is a positive integer satisfying n+p=2 to 20; wherein R 12 and R 13 are the same or different and each is a hydrogen atom or methyl group; and q is an integer of 4 to 13; ##STR6## wherein R 14 is a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an aryl group; R 15 and R 16 are each a hydrogen atom or a methyl group, provided that at least one is a methyl group; R 17 and R 18 are the same or different, and each is a hydrogen atom or a methyl group; r is 0, 1, 2 or 3; and s, t and w are each a positive integer satisfying s+t+u=3 to 30; or a mixture of two or more of said acrylate or methacrylate ester derivatives; and (3) a photopolymerization initiator.