Lithographic printing plate precursor
AssigneeAgfa Graphics NV
InventorsXavier André, Philippe Moriamé, Hubertus Van Aert
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Abstract
A positive-working lithographic printing plate precursor is disclosed which comprises on a support having a hydrophilic surface or which is provided with a hydrophilic layer a heat and/or light-sensitive coating including an infrared absorbing agent and a compound including a benzoxazine group.
Claims12
A positive-working lithographic printing plate precursor which comprises on a support having a hydrophilic surface or which is provided with a hydrophilic layer, a heat and/or light-sensitive coating including an infrared absorbing agent and an alkali soluble resin including a benzoxazine group, wherein the alkali soluble resin comprises a monomeric unit derived from the monomer according to the following structure (V):
- wherein
- R3 to R6 represent hydrogen, a halogen, an optionally substituted straight, branched or cyclic alkyl, aralkyl, hetero-aralkyl, (di)alkylamine, aryl, heteroaryl group, or a structural moiety comprising an ethylenically unsaturated polymerizable group and/or combinations thereof;
- each of adjacent R3 to R5 may represent the necessary atoms to form one or more cyclic structure(s);
- and
- with the proviso that at least one of R3 to R6 represents or comprises a structural moiety including an ethylenically unsaturated polymerizable group.
A positive-working lithographic printing plate precursor which comprises on a support having a hydrophilic surface or which is provided with a hydrophilic layer, a heat and/or light-sensitive coating including an infrared absorbing agent and a compound including a benzoxazine group represented by one of the following structures:
- wherein
- Q and Q′ independently represent an optionally substituted alkylidene or hetero-alkylidene group, an optionally substituted nitrogen, an oxygen, a sulphone, a sulphoxide, a carbonyl, a thioether, a thiol or a phosphine oxide group;
- R10 represents hydrogen or an optionally substituted alkyl, alicyclic alkyl, aralkyl, aryl or heteroaryl group;
- R11, R12 and R13 independently represent hydrogen, a halogen or an optionally substituted alkyl, alicyclic alkyl, aralkyl, aryl or heteroaryl group;
- and
- n and n′ independently represent an integer comprised between 1 and 4, wherein the compound including a benzoxazine group is present in the coating in an amount comprised between 0.01 g/m2 to 1 g/m2.
Dependencies are inferred from the claim text.