US 6,187,528 B1 · Photothermographic recording material coatable from an acqueous medium

Abstract

A photothermographic recording material comprising a support and a photo-addressable thermally developable element comprising photosensitive silver halide in catalytic association with a substantially light-insensitive organic silver salt, an organic reducing agent for the substantially light-insensitive organic silver salt in thermal working relationship therewith and a water-soluble or water-dispersible binder, characterized in that the substantially light-insensitive organic silver salt is a silver salt of an organic carboxylic acid, the photo-addressable thermally developable element further comprises a non-ionic or anionic surfactant and the photo-addressable thermally developable element is coatable from an aqueous medium and is capable of producing stable images without a wet-processing step; a process for producing the photothermographic recording material and a photothermographic recording process therefor.

Claims18

Dependent claims

A photothermographic recording material comprising a support and a photo-addressable thermally developable element comprising photosensitive silver halide in catalytic association with a substantially light-insensitive organic silver salt, an organic reducing agent for said substantially light-insensitive organic silver salt in thermal working relationship therewith and a binder, wherein said substantially light-insensitive organic silver salt is a silver salt of an organic carboxylic acid, wherein either (1) said organic carboxylic acid consists of a carboxyl group and an organic moiety which organic moiety is selected from the group consisting of alkyl, aryl, aralkyl, and alkaryl, or (2) said organic carboxylic acid is an aliphatic carboxylic acid optionally substituted with a hydroxyl or thioether group;

wherein said photo-addressable thermally developable element further comprises an anionic surfactant, said anionic surfactant being a sulfonate, and said binder is a polymer containing monomer units selected from the group consisting of a diene-monomer, a methacrylate, styrene and an acrylate.

A process for producing a photothermographic recording material, including a support and a photo-addressable thermally developable element containing photosensitive silver halide in catalytic association with a substantially light-insensitive organic silver salt of an organic carboxylic acid, an organic reducing agent for said substantially light-insensitive organic silver salt in thermal working relationship therewith and a binder, comprising the steps of:

(i) preparing an aqueous suspension of particles of a substantially light-insensitive silver salt of an organic carboxylic acid, wherein either (1) said organic carboxylic acid consists of a carboxyl group and an organic moiety which organic moiety is selected from the group consisting of alkyl, aryl, aralkyl, and alkaryl, or (2) said organic carboxylic acid is an aliphatic carboxylic acid optionally substituted with a hydroxyl or thioether group;
(ii) preparing an aqueous dispersion or aqueous dispersions containing said photosensitive silver halide, said particles of a substantially light-insensitive organic silver salt, said organic reducing agent, and said binder (iii) coating said aqueous dispersion or aqueous dispersions onto a support, wherein said photo-addressable thermally developable element further comprises an anionic surfactant anionic anionic surfactant being a sulfonate, and said binder is a polymer containing monomer units selected from the group consisting of a diene-monomer, a methacrylate, styrene and an acrylate.

Dependencies are inferred from the claim text.

Photothermographic recording material coatable from an acqueous medium

Life of this patent

Photothermographic recording material coatable from an acqueous medium

Life of this patent

Abstract

Claims18