Light-sensitive diazo photopolymerizable composition with polyurethane having carbon-carbon unsaturated and a carboxyl group

A light-sensitive composition which comprises an admixture of a polyurethane resin having a carbon-carbon unsaturated bond and a carboxyl group, a monomer having at least one polymerizable, ethylenically unsaturated group, a photopolymerization initiator and/or a sensitizer and a diazonium compound,

• wherein the polyurethane resin has a basic skeleton of a reaction product of a diisocyanate compound represented by the following general formula (I) with a diol compound having a carboxyl group represented by general formula (II) or (III);
• ##STR35## wherein, R.sub.1 represents a divalent aliphatic or aromatic hydrocarbon which may have substituents;
• R.sub.2 represents a hydrogen atom, alkyl, alkenyl, aralkyl, aryl, alkoxy or aryloxy group, all of which may have substituents;
• R.sub.3, R.sub.4 and R.sub.5 may be same or different and represent a single bond or divalent aliphatic or aromatic hydrocarbon which may have substituents;
• or two or three out of R.sub.2, R.sub.3, R.sub.4 and R.sub.5 may form a ring;
• and Ar represents a trivalent aromatic hydrocarbon which may have substituents, and the carbon-carbon unsaturated bond is introduced into the polyurethane resin by:
• (a) reacting a part of carboxyl groups of the compound of general formula (II) or (III) with a halogen compound or epoxy compound having a carbon-carbon unsaturated bond in the presence of a base, or
• (b) using a diol compound having a carbon-carbon unsaturated bond together with the diol compound of general formula (II) or (III), and the reaction product of said diisocyanate compound and said diol compound does not contain an isocyanate group.