Patent ID: 8257907
Filing Date: 2012-09-04
Classification: B41C,G03F,Y10T

Abstract:
1. A negative-working imageable element that is a lithographic printing plate precursor comprising a substrate having thereon an imageable layer comprising: a free radically polymerizable component, an initiator composition capable of generating radicals sufficient to initiate polymerization of said free radically polymerizable component upon exposure to imaging radiation, a radiation absorbing compound, one or more polymeric binders, and at least 5 weight % of core-shell particles comprising a hydrophobic polymeric core and a hydrophilic polymeric shell that is covalently bound to said polymeric core, said hydrophilic polymeric shell comprising one or more zwitterionic functional groups that are supplied from one or more ethylenically unsaturated polymerizable monomers used to prepare the polymeric shell, wherein said zwitterionic functional group is a sulfobetaine, carboxybetaine, phoshabetaine, or sulfabetaine.