Patent ID: 7297462

Claim:
A heat-sensitive lithographic printing plate precursor comprising on a support having a hydrophilic surface or which is provided with a hydrophilic layer, a coating comprising an infrared absorbing agent and a copolymer comprising a plurality of recurring units X and a plurality of recurring units Y, wherein the recurring unit X is represented by the following formula: and the recurring unit Y is represented by the following formula: wherein a and c are 0 or 1, wherein L 1 and L 2 independently represent a linking group, wherein R a , R b , R c , R d , R e and R f independently represent hydrogen, an alkyl, cycloalkyl, aryl, heteroaryl group, a carboxylic acid, an ester of a carboxylic acid, an amide of a carboxylic acid, or an akyl or aryl group which is substituted with a carboxylic acid, with an ester of a carboxylic acid or with an amide of a carboxylic acid, wherein b is 0 or 1 and when b=0, a=1 and L 1 is further bound to C 1 to form a cyclic structure, wherein d is 0 or 1 and when d=0, c=1 and L 2 is further bound to C 2 to form a cyclic structure, and wherein R 1 and R 2 represent respectively a hydrophilic polymeric pendant group and a hydrophobic polymeric pendant group.