Patent ID: 6949326

Claim:
A lithographic printing plate for infrared laser, comprising a support and a heat-sensitive layer containing the following (A) to (D): (A) a substance which absorbs a light to generate heat; (B) an alkaline aqueous solution-soluble resin having a phenolic hydroxyl group; (C) a polymer containing a (meth)acrylate monomer having 2 or 3 perfiuoroalkyl groups containing 3 to 20 carbon atoms within the molecule as a polymer component; and (D) a fluorine-containing polymer containing as copolymer components at least the following components 1), 2) and 3): 1) an addition polymerizable, fluorine-containing monomer having in the side chain a fluoro aliphatic group wherein hydrogen atoms on the carbon atoms are replaced by fluorine atoms; 2) a monomer selected from the group consisting of monomers having a structure represented by the following formulas [1], [2], [3] and [4]; CH 2 ═CA 1 [CO—W—R 2 ] [1] CH 2 ═CA 1 [O—CO—R 3 ] [2] CH 2 ═CA 1 [U] [3] wherein A 1 represents a hydrogen atom, a halogen atom or an alkyl group, W represents oxygen or —NR 1 —, R 1 represents a hydrogen atom, an alkyl group or an aryl group, R 2 represents an optionally substituted alkyl group or an optionally substituted aryl aroup; R 3 represents an alkyl group or an aryl group, and U represents a cyano group, an aryl group, an alkoxy group, an aryloxy group, an acyloxymethyl group, a nitrogen-containing hetero ring or —CH 2 OCOR 3 ; and 3) a monomer having an acidic hydrogen atom and having an acidic group wherein the acidic hydrogen atom is bound to a nitrogen atom.