Photopolymerizable composition

Claim 1

A photopolymerizable composition developable with an alkali aqueous solution which comprises: (1) a carboxyl group-containing high polymer binder having the weight-average molecular weight of 5,000 to 2,000,000 in the amount of 40 to 90% by weight; (2) a photopolymerizable monomer in the amount of 10 to 60% by weight; (3) a photopolymerization initiator system comprising a lophine dimer in the amount of 0.1 to 20% by weight; and (4) at least one compound selected from the group consisting of compound represented by the general formulae (I), (II) and (III) in the amount of 0.1 to 10% by weight: wherein R 1 to R 10 may be either the same or different and each represents H, NR 11 2 , OR 11 , SR 11 , COOR 11 , CN a halogen atom, NO 2 , CHO, SO 3 R 11 , R 11 CONHNH, R 11 SO 2 NH, an aryl group having 6 to 10 carbon atoms, an alkyl group having 1 to 10 carbon atoms, an aminoalkyl group having 1 to 10 carbon atoms, a hydroxyalkyl group having 1 to 10 carbon atoms, a carboxyalkyl group having 1 to 10 carbon atoms, an aralkyl group having 7 to 20 carbon atoms or a monophorino group; Y represents an alkylene group having 1 to 10 carbon atoms, an arylene group having 6 to 12 carbon atoms or an aralkylene group having 7 to 25 carbon atoms which may be substituted by NR 11 2 , OR 11 , SR 11 , COOR 11 , CN, a halogen atom, NO 2 , CHO, SO 3 R 11 , R 11 CONHNH, R 11 SO 2 NH, or a monophorino group, and which may contain between two carbon atoms a bivalent intervenient group of pyperadine residue, COO, NR 11 , SO 2 , SO 2 NR 11 , O, S, CONR 11 , CONHCO or COONR 11 ; wherein R 11 represents H, an alkyl group having 1 to 10 carbon atoms or an aryl group having 6 to 10 carbon atoms.