Eastman-kodak Company

David A Dickinson

Mark Lelental

Joe E Maskasky

Peter John Ghyzel

Victor P Scaccia

Thomas R Welter

James L Wakley

John W Boettcher

Keath T Chen

Thomas N Blanton

Alan R Pitt

Roger L Klaus

George J Burgmaier

John V Nelson

Henry J Gysling

Trevor J Wear

J Ramon Vargas

Robert A Guistina

Michael W Orem

Stephen A Godleski

Antony J Williams

Richard L Gaines

Aqueous-based thermally sensitive emulsions and photothermographic imaging materials include photosensitive silver halide grains that comprise at least 15 mol % iodide based on total silver in the grains and are doped with bismuth (+3). These materials have increased photographic speed especially in the infrared region of the electromagnetic spectrum.

Photothermographic materials containing doped high iodide emulsions

The present disclosure relates to aqueous dispersions of silver (carboxylate-azine toner) particles wherein the azine content of the particles is from about 0.01 to 10% by weight relative to silver carboxylate. The carboxylates are typically silver salts of long chain fatty acids and the azine toners are the compounds that function as development accelerators and toning agents such as phthalazine. These silver (carboxylate-azine) particles can be used to formulate imaging forming compositions that are useful in aqueous thermographic or photothermographic imaging elements.

Silver-(carboxylate-azine toner) particles for photothermographic and thermographic imaging

Aqueous-based thermally developable emulsions and photothermographic imaging materials include photosensitive silver halide core-shell grains that comprise at least 20 mol % iodide based on total silver, an amount of iodide in the core of the grains that can be up to the iodide saturation limit in silver iodobromide, and an amount of iodide in the shell of the grains that is at least 2 mol % less than the amount of iodide present in the core, and further provided that the total amount of silver in the shell is from about 10 to about 80 mol % of total silver in the grains. These materials provide desired D and reduced image &ldquo;print out&rdquo;.

Photothermographic materials containing high iodide core-shell emulsions

Chemically sensitized aqueous-based photothermographic emulsions and materials and methods of using same

Silver-(carboxylate-azine toner) particles for photothemographic and thermographic imaging

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.

Silver (carboxylate-n-alkyl thiolate) particles for photothermographic of thermographic imaging

Aqueous-based thermally sensitive emulsions and photothermographic imaging materials include phthalazine N-oxide or a derivative thereof to improve raw stock keeping and to extend the useful range of processing temperatures without interfering with spectral sensitization. The emulsions and photothermographic materials may also include a cyclic imide, phthalazinone, benzoxazine dione, benzthiazine dione, or quinazoline dione as a development promoter.

Thermally sensitive imaging materials containing phthalazine precursor

There is disclosed a nanoparticulate dispersion of a silver carboxylate particles having on the surface of the particles a surface modifier which is a nonionic oligomeric surfactant based on vinyl polymer with an amido function. In particular, the surface modifier is acrylamide, methacrylamide 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.

Polyacrylamide surface modifiers for silver carboxylate nanoparticles

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

Phosphoric acid ester surface modifiers for silver carboxylate nanoparticles

There is disclosed an aqueous photothermographic composition comprising a) a photosensitive silver halide emulsion precipitated in a water dispersible cationic starch peptizing agent and b) an oxidation-reduction imaging forming composition comprising (I) a colloidal dispersion of silver compound particles and (ii) an organic reducing agent. The use of a starch peptizing agent reduces the fog in an element using the composition upon thermal processing.

Aqueous photothermographic imaging elements comprising aqueous silver halide emulsions precipitated in the presence of cationic starch peptizing agent

Photographic elements are provided which contain a compound having the formula:

Photographic elements containing release compounds

A photographic emulsion comprising dispersed in a binder sensitized silver halide grains wherein the emulsion is sensitized from an organometallic compound of formula:

Photographic emulsion having an improved speed, photographic element

A silver halide color photographic element comprising a support, a silver halide emulsion and poly(alkylene oxide)s wherein greater than 50 percent of the poly(alkylene oxide)s have acidic functional end groups with an aqueous pKa.ltoreq.10, or end groups which will react to form acidic functional end groups with an aqueous pKa.ltoreq.10 during development, on both termini; and wherein the poly(alkylene oxide)s have a molecular weight ranging substantially between 1700 and 6000 AMU.

Poly (alkylene oxide)s in photographic elements

This invention relates to a silver halide color photographic element comprising a support, a silver halide emulsion and poly(thioether)s wherein greater than 50 percent of the poly(thioether)s have acidic functional end groups with an aqueous pKa.ltoreq.10, or end groups which will react to form acidic functional end groups with an aqueous pKa.ltoreq.10 during development, on both termini and wherein the poly(thioether)s have a molecular weight greater than 800.

Thioethers in photographic elements

A photographic element comprising a support having located thereon at least one silver halide emulsion layer, the element containing a release compound that provides a non-imagewise distribution of a photographically active moiety, the release compound comprising a blocking group from which the photographically active moiety is released, the release compound further comprising a ballasting group other than a coupler moiety, and an aqueous solubilizing group, both the ballasting group and the aqueous solubilizing group being attached to the blocking group.

Growing community of inventors

Brockport, NY, United States of America

David A Dickinson