Photothermographic element comprising improved base precursors and methods for their use
AssigneeEastman Kodak Company
InventorsRamanuj Goswami, David H. Levy
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Abstract
Photothermographic elements employing improved base precursors that undergo thermal decomposition are disclosed. Thermal-dye-bleach agents, and in particular, a novel class of salts of arylsulfonylacetic acids as bleaching agents for photothermographic use are disclosed. Photothermographic elements employing these thermal-dye-bleach agents are suitable for use as acutance and antihalation systems, bleachable filter dye materials, and in promoting unblocking of various components such as blocked developers, especially in photothermographic elements.
Claims20
A photothermographic element comprising a support having thereon at least one coatable light-sensitive imaging layer and at least one layer comprising an effective amount of a base precursor comprising the salt of an organic base with an arylsulfonylacetic acid having the following structure:
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- wherein each of R2 and R3 is a monovalent group selected from the group consisting of hydrogen, an alkyl group, an alkenyl group, a cycloalkyl group, an aralkyl group, an aryl group and a heterocyclic group, wherein each of the monovalent groups may have one or more substituent groups;
- the subscript n is 1 to 4 and each of the R1 groups may be independently selected from one or more substituent groups.
Dependencies are inferred from the claim text.