Patent ID: 7232644
Filing Date: 2007-06-19
Classification: B41C,G03F,Y10S

Abstract:
1. A negative-working planographic printing plate precursor that can be recorded by a solid laser or a semiconductor laser capable of radiating actinic ray in an ultraviolet to infrared wavelength region of 300 nm to 1,200 nm, and comprises a support having a recording layer containing a polymerizable composition provided thereon, wherein the support is an aluminum sheet, a surface of which has been roughened, and wherein the polymerizable composition comprises: a binder polymer containing at least an acid group having an acid dissociation constant (pKa) of 5.5 or more and a radical addition polymerizable group; and a radical-generating compound capable of generating a radical with light or heat, wherein the binder polymer comprises a structural unit that has the acid group and that is represented by a formula selected from the group consisting of formulae (2), (3), (4), (5), (6), (7) and (8): wherein in formula (2), X represents an alkylene group, a substituted alkylene group, —CH wherein R wherein formula (3), R represents a hydrogen atom or an alkyl group; X represents a divalent linking group; and Y represents a divalent aromatic group which may have substituents; wherein in formula (4), each of R wherein in formula (5), R wherein in formulae (6) and (7), each of X wherein in formula (8), A