Silver (carboxylate-n-alkyl thiolate) particles for photothermographic of thermographic imaging
AssigneeEastman Kodak Company
InventorsPeter J. Ghyzel, Mark Lelental, David A. Dickinson, Alan R. Pitt, Trevor J. Wear
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Abstract
The present disclosure relates to dispersions of silver (carboxylate-n-alkyl thiolate). The carboxylates are typically silver salts of long chain fatty acids and the n-alkyl thiolate is preferably 1-dodecanethiol. These silver (carboxylate-n-alkyl thiolate) particles can be used to formulate imaging forming compositions that are useful in aqueous thermographic or photothermographic imaging elements.
Claims16
An aqueous photothermographic composition comprising a) a spectrally sensitized photosensitive silver halide emulsion containing a gelatino peptizer and b) an oxidation-reduction imaging forming composition comprising (i) a dispersion of silver (carboxylate-n-alkyl thiolate) particles having on the surface of the particles a surface modifier which is a nonionic oligomeric surfactant based on a vinyl polymer with an amido function and (ii) an organic reducing agent.
An aqueous photothermographic composition comprising a) an infrared spectrally sensitized photosensitive silver halide emulsion containing a gelatino peptizer and b) an oxidation-reduction imaging forming composition comprising (i) a dispersion of silver (carboxylate-n-alkyl thiolate) particles having on the surface of the particles a surface modifier which is a nonionic oligomeric surfactant based on a vinyl polymer with an amido function and (ii) an organic reducing agent.
Dependencies are inferred from the claim text.