Patent ID: 7425585

Claim:
A photosensitive composition comprising, (A) an oligomer or polymer containing at least one carboxylic acid group in the molecule and having a molecular weight of 200,000 or less selected from the group consisting of copolymers of (meth)acrylic acid with ethylenically unsaturated compounds, (B) at least one photoinitiator compound of formula I R 1 is linear or branched C 1 -C 12 alkyl; R 2 is linear or branched C 1 -C 4 alkyl; R 3 and R 4 independently of one another are linear or branched C 1 -C 8 alkyl; and (C) an ester of a polyol, wherein the polyol is partially or fully esterified with an ethylenically unsaturated carboxylic acid.