Positive-working radiation-sensitive imageable elements
AssigneeEastman Kodak Company
InventorsMoshe Levanon, Georgy Bylina, Vladimir Kampel, Marina Rubin, Larisa Postel, Tanya Kurtser, Moshe Nakash
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Abstract
Positive-working imageable elements having improved sensitivity, high resolution, and solvent resistance are prepared using a water-insoluble polymeric binder comprising vinyl acetal recurring units that have pendant hydroxyaryl groups, and recurring units comprising carboxylic acid aryl ester groups that are substituted with a cyclic imide group. These imageable elements can be imaged and developed to provide various types of elements including lithographic printing plates.
Claims19
A positive-working imageable element comprising a substrate having thereon an imageable layer comprising a water-insoluble polymeric binder, and a radiation absorbing compound,
- wherein the polymeric binder comprises:
- a) vinyl acetal recurring units comprising pendant hydroxyaryl groups, and
- b) recurring units comprising hydroxyaryl ester groups that are substituted with a cyclic imide group,
- wherein the vinyl acetal recurring units comprising pendant hydroxyaryl groups and the recurring units comprising hydroxyaryl ester groups that are substituted with a cyclic imide group are independently present in the polymeric binder in an amount of at least 10 mol % and 25 mol %, respectively, all based on the total recurring units in the polymeric binder.
Dependencies are inferred from the claim text.