Patent ID: 8993213
Filing Date: 2015-03-31
Classification: B41C,C08F,G03F

Abstract:
1. A positive-working lithographic printing plate precursor comprising: a substrate, an imageable layer that is an inner layer disposed on the substrate, the imageable layer comprising a polymeric binder having an acid number of at least 30 mg KOH/g of polymer to and including 150 mg KOH/g of polymer, the polymeric binder comprising, in random order, at least 3 weight % of recurring units derived from one or more N-alkoxymethyl (alkyl)acrylamides or alkoxymethyl (alkyl)acrylates, at least 2 weight % of recurring units having pendant 1H-tetrazole groups, and at least 10 weight % of recurring units having pendant cyano group, and an outer layer disposed on the inner layer, which outer layer comprises a polymeric binder different from the polymeric binder in the inner layer, and an infrared radiation absorbing compound that is present only in the outer layer.