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AssigneeEastman Kodak Company
InventorsMark Lelental, David A. Dickinson, James L. Wakley, Michael W. Orem, Peter J. Ghyzel
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There is disclosed an oxidation-reduction imaging forming composition comprising an aqueous based dispersion of (i) nanoparticulate silver carboxylate particles having on the surface of the particles a surface modifier which is a phosphoric acid ester and (ii) an organic reducing agent. In particular, the surface modifiers can be mixtures of mono- and di-esters of orthophosphoric acid and hydroxyl-terminated, oxyethylated long-chain alcohols or oxyethylated alkyl phenols or derivatives thereof. Also disclosed are various compositions including the dispersions including oxidation-reduction imaging forming compositions, thermographic elements and photothermographic compositions and elements. The preferred carboxylate is a silver salt of a long chain fatty acid such as silver behenate. A media milling method and a controlled precipitation method of making the dispersions are also disclosed
An oxidation-reduction image forming composition comprising an aqueous based dispersion of (i) nanoparticulate silver carboxylate particles having on the surface of the particles a surface modifier which is a phosphoric acid ester and (ii) an organic reducing agent.
A thermographic element comprising a support having thereon an imaging layer comprising an aqueous oxidation-reduction imaging forming composition comprising (i) a nanoparticulate dispersion of silver carboxylate particles having on the surface of the particles a surface modifier which is a phosphoric acid ester and (ii) an organic reducing agent
An photothermographic composition comprising an aqueous based dispersion of a) a photosensitive silver halide emulsion containing a peptizer and b) an oxidation-reduction imaging forming composition comprising (i) nanoparticles of silver carboxylate particles having on the surface of the particles a surface modifier which is a phosphoric acid ester and (ii) an organic reducing agent.
A photothermographic element comprising a support having thereon an aqueous photothermographic composition comprising a) a photosensitive silver halide emulsion containing a peptizer and b) an oxidation-reduction imaging forming composition comprising (i) a nanoparticulate dispersion of silver carboxylate particles having on the surface of the particles a surface modifier which is a phosphoric acid ester and (ii) an organic reducing agent.
A controlled precipitation method of making nanoparticulate silver carboxylate particles having on the surface of the particles a surface modifier which is a phosphoric acid ester, said method comprising the steps of:
Dependencies are inferred from the claim text.