Patent ID: 7678533

Claim:
A positive-working heat-sensitive lithographic printing plate precursor comprising a support having a hydrophilic surface or which is provided with a hydrophilic layer, a coating which does not dissolve in an aqueous alkaline developer in the unexposed areas and which becomes soluble in an aqueous alkaline developer in the exposed areas, and an intermediate layer between said hydrophilic surface or said hydrophilic layer and said coating, wherein said intermediate layer comprises a first polymer having a first monomeric unit which is vinylcaprolactam, wherein said first polymer comprises said first monomeric unit in an amount between 3 mol % and 75 mol %, wherein said first polymer further comprises a second monomeric unit of formula II: wherein R 6 , R 7 and R 8 are independently a hydrogen atom or an optionally substituted alkyl group, R 9 is a hydrogen atom, or an optionally substituted alkyl, cycloalkyl, aryl or arylalkyl group, R 10 is represented by formula IV: wherein * denotes the position of attachment of the group R 10 to the nitrogen atom in formula II, R 13 and R 14 are independently a hydrogen atom, or an optionally substituted alkyl, alkenyl, cycloalkyl, aryl, arylalkyl or heteroaryl group, or wherein R 13 and R 14 together form a cyclic structure.