# US 4,396,712 A · Dry image forming material

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 4,396,712 A
- Document ID: US4396712A
- Status: Granted
- Kind: A
- Application number: 06/268,438
- Filed: 1981-05-29
- Granted: 1983-08-02
- Earliest claimed: 1980-05-30
- Assignees: Asahi Kasei Kogyo Kabushiki Kaisha
- Inventors: Shozo Kinoshita; Muneaki Kimura; Tetsuo Shiga
- Web page: https://patentgrep.com/patent/US4396712A

## CPC

- G03C 1/49845: {Active additives, e.g. toners, stabilisers, sensitisers}
- G03C: PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES (for photomechanical purposes G03F); PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY (photographic processes characterised by the use or manipulation of apparatus classifiable per se in subclass G03B, see G03B; photomechanical production of textured or patterned surfaces G03F; electrophotography, magnetography G03G)

## Abstract

A novel dry image forming material comprising in one or more layers on a support (a) a non-photosensitive organic silver salt oxidizing agent, (b) a reducing agent for silver ions, (c) a silver halide component or a silver halide-forming component, (d) a toning agent and (e) a lipophilic binder, characterized by the inclusion of a specific 2-(2'-hydroxyphenyl)benzotriazole compound having bulky tert-butyl or tert-amyl groups at its ortho- and para-positions relative to the hydroxyl group in a layer containing the component (a). The dry image forming material of the present invention has high storage stability prior to use for image formation. When the dry image forming material comprises a combination of a silver salt oxidizing agent-containing layer comprising the specific 2-(2'-hydroxyphenyl)benzotriazole compound and a reducing agent-containing layer comprising a high impact acrylic resin as a binder material, the material is remarkably improved in storage stability of raw material in the dark or under light with wavelengths of 450 nm or more and the stability of a latent image, and shows minimized variation in image quality with heat development conditions. When the dry image forming material comprises, as the component (a), a silver salt of long chain fatty acid having 16 or more carbon atoms and, as the component (c), a silver halide component including silver iodide or a silver halide-forming component capable of forming a silver halide component including silver iodide, and further comprises (g) an oxidizing agent for free silver, (h) a photoreactive halogeno oxidizing agent and, in the layer containing the components (a), (c), (e) and (f), (i) a specific cyanine spectral sensitizing dye, the material is of the post-activation type and spectrally sensitized without sacrificing the storage stability of raw material.

## Claims

### Claim 1

A dry image forming material comprising in one or more layers on a support:
(a) a non-photosensitive organic silver salt oxidizing agent,
(b) a reducing agent for silver ions,
(c) a silver halide component of a silver halide-forming component capable of forming a silver halide component by the reaction thereof with the component (a),
(d) a toning agent,
(e) a lipophilic binder, and
(f) at least one member selected from the group consisting of those compounds represented by the following formulae; ##STR18## wherein R stands for a hydrogen atom, a C.sub.1 -C.sub.8 straight or branched chain alkyl group, a C.sub.1 -C.sub.4 straight or branched chain alkoxyl group, a phenyl group or a halogen atom selected from Cl, Br and I;
the component (f) being included in a layer containing the component (a) and being present in an amount sufficient to improve the storage stability.

### Claim 2 (depends on 1)

A dry image forming material as claimed in claim 1, wherein, in the formulae (I) and (II), R is a hydrogen atom.

### Claim 3 (depends on 1, 2)

A dry image forming material as claimed in claim 1 or 2, wherein the component (f) comprises at least one compound of the formula (I).

### Claim 4 (depends on 1, 2)

A dry image forming material as claimed in claims 1 or 2, wherein the amount of the component (f) is in the range of from 1.times.10.sup.-2 to 6.times.10.sup.-1 mole per mole of the component (a).