Patent ID: 7037636

Claim:
A presensitized plate useful for preparing a lithographic printing plate, which comprises a substrate provided thereon with a light-sensitive layer containing a fluoro-aliphatic group-containing copolymer prepared by copolymerizing at least the following monomers (A) and (B): (A) a fluoroalkyl(meth)acrylate represented by the following general formula (I): wherein X is —O—, R 1 is —H or —CH 3 , R 2 is an optionally substituted alkyl group having 3 carbon atoms, m is a number ranging from 1 to 10 and n is 4; (B) a polyoxyalkylene group-containing ethylenic unsaturated monomer represented by the following general formula (II): wherein X 2 is —O—, Y is an optionally substituted alkylene group having 2 to 4 carbon atoms, R 4 is —H or —CH 3 , R 5 is a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, an optionally substituted cycloalkyl group having 3 to 12 carbon atoms, an optionally substituted aryl group having 6 to 12 carbon atoms, or an optionally substituted aralkyl group having 6 to 24 carbon atoms, and q is an integer of 3–30, provided that Y may represent the same or different group.