Patent ID: 8313885

Claim:
A heat-sensitive lithographic printing plate precursor comprising on a grained and anodized aluminum support a compound which is capable of converting from a hydrophobic state or vice versa to a hydrophilic state upon exposure to heat and/or in the presence of an acid or a base, and is represented by the following formula: A-(L) n -B wherein L represents a linking group, n represents 0 or 1; B represents a thermo-labile group; and A is selected from the group consisting of a halosilanyl group, an alkoxysilanyl group, a phosphonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a salicylic acid group or a salt thereof, a boronic acid group or an ester or a salt thereof, an optionally substituted di- or tri-hydroxyaryl group, an optionally substituted salicaldoxime group, an optionally substituted salicaldimine group, an optionally substituted hydroxyheteroaryl group, an amidine group, a 1,3-dicarbonyl group or a group represented by the formula (i) wherein Q and Z independently represent the necessary atoms to form an optionally substituted five or six membered aromatic or heteroaromatic ring; and group B comprises an optionally substituted alkyl group, an alkyl carboxylate group, an alkoxyalkyl carboxylate group, a benzyl carboxylate group, an oxime carboxylate group, an alkyl carbonate group, an alkoxyalkyl carbonate group, a benzyl carbonate group, an oxime carbonate group, an alkyl carbamate group, an alkoxyalkyl carbamate group, a benzyl carbamate group an oxime carbamate group, —PO—(OR a ) 2 , —SO 2 —O—R b , —OPO—(OR c ) 2 , —OSO 2 —O—R d , —SO 2 —SO 2 —R e , —SO 2 —NR f —SO 2 —R g wherein R a to R g each represent an optionally substituted alkyl or aryl group, or R a to R d represent a cyclic imide group or R f represents —SO 2 —R h wherein R h represents an optionally substituted alkyl or aryl group.