Patent ID: 9352602
Filing Date: 2016-05-31
CPC Classification: B41C,B41N,G03F

Claim Text:
1. A lithographic printing plate precursor comprising a photosensitive layer and a protective layer in this order on a support, wherein the photosensitive layer contains a sensitizing dye, a polymerization initiator, a polymerizable compound and a binder polymer, and the protective layer contains a polymer which has a repeating unit represented by the following formula (1) and a repeating unit represented by the following formula (2) in which a sum of the repeating unit represented by the formula (1) and the repeating unit represented by the formula (2) is 90% by mole or more based on total repeating units constituting the polymer: wherein, in the formulae (1) and (2), R 1 and R 4 each represents a hydrogen atom or a methyl group, R 2 and R 3 , which may be same or different, each represents a hydrogen atom, a methyl group or an ethyl group, and R 5 represents an unsubstituted alkyl group having from 1 to 8 carbon atoms or an alkyl group substituted with an aromatic group or a heterocyclic group.