Patent ID: 8110338

Claim:
A heat-sensitive positive-working lithographic printing plate precursor comprising: a support having a hydrophilic surface or which is provided with a hydrophilic layer; a heat-sensitive coating including an IR absorbing agent, a phenolic resin, and a first polymer; wherein the first polymer is an alkaline soluble polymer including a monomeric unit having a structure according to Formula I or Formula II: wherein: * denotes binding sites of the monomeric unit in the polymer backbone; R 1 is hydrogen or an alkyl group; Z represents oxygen or —NR 2 —; a and b independently are 0 or 1; R 2 is hydrogen or an optionally substituted alkyl, alkenyl, or alkynyl group; and Ar 1 and Ar 2 are an aromatic group with the proviso that at least one of Ar 1 and Ar 2 is an optionally substituted heteroaromatic group.