Patent ID: 7998652
Filing Date: 2011-08-16
Classification: B41C,B41M,B41N

Abstract:
1. A lithographic printing plate precursor comprising: a support; and further wherein said at least one layer further comprises an undercoat layer formed between the support and the image-recording layer, the undercoat layer comprises a copolymer containing repeating units represented by the following formula (I): wherein said copolymer comprises: (a1) a unit comprising at least one ethylenically unsaturated bond, wherein the unit (a1) is represented by formula (A1): in which R R L represents a bivalent connecting group selected from the group consisting of wherein for each of L1-L17 the left side is bonded to the main chain and the right side is bonded to the ethylenically unsaturated bond, the bivalent aliphatic group means an alkylene group, substituted alkylene group, alkenylene group, substituted alkenylene group, alkynylene group, substituted alkynylene group, or polyalkyleneoxy group, and the bivalent aromatic group means an aryl group or a substituted aryl group; and (a2) a unit comprising at least one functional group interacting with a surface of the support, wherein the unit (a2) is represented by formula (A2): in which R L represents a bivalent connecting group selected from the group consisting of —CO—, —O—, —NH—, bivalent aliphatic groups, bivalent aromatic groups, and combinations of two or more of these; and Q represents a functional group interacting with the surface of the support, and wherein a proportion of (a1) is from 5 to 80% by mole based on all copolymer units and a proportion of (a2) is from 5 to 80% by mole based on all copolymer units; wherein said copolymer further comprises (a3) a unit comprising at least one hydrophilic group represented by formula (A3): wherein R L represents a bivalent connecting group selected from the group consisting of —CO—, —O—, —NH—, bivalent aliphatic groups, bivalent aromatic groups, and combinations of two or more of these; and W represents the following groups: wherein M R R R n represents an integer of 1 to 100; and wherein the proportion of the unit (a3) is from 5 to 80% by mole based on all copolymer units; and an amount of the copolymer in the undercoat layer is from 0.1 to 100 mg/m