US 6,280,923 B1Granted

Photothermographic recording material

AssigneeAgfa-Gevaert

InventorsHerman Uytterhoeven, Yvan Gilliams, Johan Loccufier, Sabine Emmers

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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 silver salt of an organic carboxylic acid, an organic reducing agent for the substantially light-insensitive silver salt of an organic carboxylic acid in thermal working relationship therewith and a binder, characterized in that the binder is water soluble or water dispersible and the reducing agent is a non-sulfo-substituted 6-membered aromatic or heteroaromatic ring compound with at least three substituents one of which is a hydroxy group at a first carbon atom and a second of which is a hydroxy or amino-group substituted on a second carbon atom one, three or five ring atoms removed in a system of conjugated double bonds from the first carbon atom in the compound, in which (i) the third substituent may be part of an annelated carbocyclic or heterocyclic ring system; (ii) the third substituent or a further substituent is not an aryl- or oxo-aryl-group whose aryl group is substituted with hydroxy-, thiol- or amino-groups; and (iii) the third substituent or a further substituent is a non-sulfo-electron withdrawing group if the second substiuent is an amino-group and the photo-addressable thermally developable element is coated 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 is also provided.

Claims22

Dependent claims

A process for producing a photothermographic recording material comprising the step of coating one or more aqueous dispersions onto a support, said one or more aqueous dispersions which when taken together include:

particles of a substantially light-insensitive silver salt of an organic carboxylic acid;
particles of a photosensitive silver halide in catalytic association with said substantially light-insensitive silver salt of an organic carboxylic acid;
a binder comprising monomer units selected from the group consisting of a diene-monomer, a methacrylate, styrene and an acrylate;
and
an organic reducing agent for said substantially light-insensitive silver salt of an organic carboxylic acid in thermal working relationship therewith, wherein said reducing agent is selected from the group consisting of
(i) an aromatic ring compound selected from the group consisting of a substituted catechol and a substituted hydroquinone, said aromatic ring compound having one or more substituents selected from the group consisting of alkyl, alkoxy, carboxy, carboxy ester, thioether, alkyl carboxy, alkyl carboxy ester, aryl, sulfonyl alkyl, sulfonyl aryl, formyl, oxo-alkyl and oxo-aryl;
(ii) a 5-hydroxy-anthranilic acid;
(iii) a 2,3-dihydroxy pyridine;
(iv) a 2,3-dihydroxy pyridine that is further substituted with one or more substituents selected from the group consisting of alkyl, alkoxy, carboxy, carboxy ester, thioether, alkyl carboxy, alkyl carboxy ester, aryl, sulfonyl alkyl, sulfonyl aryl, formyl, oxo-alkyl and oxo-aryl;
(v) a 1,5-dihydroxy naphthalene or a 2,3-dihydroxy naphthalene;
(vi) a 1,5-dihydroxy naphthalene or a 2,3-dihydroxy naphthalene that is further substituted with one or more substituents selected from the group consisting of alkyl, alkoxy, carboxy, carboxy ester, thioether, alkyl carboxy, alkyl carboxy ester, aryl, sulfonyl alkyl, sulfonyl aryl, formyl, oxo-alkyl and oxo-aryl;
(vii) a 3,3,3′,3′-tetramethyl-1,1′-spirobisindane-5,5′,6,6′-tetrol;
(viii) a 2-amino-5-dimethylaminosulfonyl-phenol;
and combinations thereof.

11 more elements

A photothermographic recording method comprising the steps of:

(a) image-wise exposing a photothermographic recording material to a source of actinic radiation to which said photothermographic recording material is sensitive, wherein said photothermographic recording material is produced by a process comprising the step of coating one or more aqueous dispersions onto a support, said one or more aqueous dispersions which when taken together include:
particles of a substantially light-insensitive silver salt of an organic carboxylic acid;
particles of a photosensitive silver halide in catalytic association with said substantially light-insensitive silver salt of an organic carboxylic acid;
a binder comprising monomer units selected from the group consisting of a diene-monomer, a methacrylate, styrene and an acrylate;
and
an organic reducing agent for said substantially light-insensitive silver salt of an organic carboxylic acid in thermal working relationship therewith, wherein said reducing agent is selected from the group consisting of
(i) an aromatic ring compound selected from the group consisting of a substituted catechol and a substituted hydroquinone, said aromatic ring compound having one or more substituents selected from the group consisting of alkyl, alkoxy, carboxy, carboxy ester, thioether, alkyl carboxy, alkyl carboxy ester, aryl, sulfonyl alkyl, sulfonyl aryl, formyl, oxo-alkyl and oxo-aryl;
(ii) a 5-hydroxy-anthranilic acid;
(iii) a 2,3-dihydroxy pyridine;
(iv) a 2,3-dihydroxy pyridine that is further substituted with one or more substituents selected from the group consisting of alkyl, alkoxy, carboxy, carboxy ester, thioether, alkyl carboxy, alkyl carboxy ester, aryl, sulfonyl alkyl, sulfonyl aryl, formyl, oxo-alkyl and oxo-aryl;
(v) a 1,5-dihydroxy naphthalene or a 2,3-dihydroxy naphthalene;
(vi) a 1,5-dihydroxy naphthalene or a 2,3-dihydroxy naphthalene that is further substituted with one or more substituents selected from the group consisting of alkyl, alkoxy, carboxy, carboxy ester, thioether, alkyl carboxy, alkyl carboxy ester, aryl, sulfonyl alkyl, sulfonyl aryl, formyl, oxo-alkyl and oxo-aryl;
(vii) a 3,3,3′,3′-tetramethyl-1,1′-spirobisindane-5,5′,6,6′-tetrol;
(viii) a 2-amino-5-dimethylaminosulfonyl-phenol;
and combinations thereof;
and
(b) thermally developing said image-wise exposed photothermographic recording material.

14 more elements

A photothermographic recording material, comprising:

particles of a substantially light-insensitive silver salt of an organic carboxylic acid, said substantially light-insensitive particles having a diameter of 40 to 60 mn;
particles of a photosensitive silver halide in catalytic association with said particles of a substantially light-insensitive silver salt of an organic carboxylic acid, said photosensitive silver halide particles having a diameter of less than or equal to 40 nm;
a binder comprising monomer units selected from the group consisting of a diene-monomer, a methacrylate, styrene and an acrylate;
and
an organic reducing agent for said substantially light-insensitive silver salt of an organic carboxylic acid in thermal working relationship therewith, wherein said reducing agent is selected from the group consisting of
(i) an aromatic ring compound selected from the group consisting of a substituted catechol and a substituted hydroquinone, said aromatic ring compound having one or more substituents selected from the group consisting of alkyl, alkoxy, carboxy, carboxy ester, thioether, alkyl carboxy, alkyl carboxy ester, aryl, sulfonyl alkyl, sulfonyl aryl, formyl, oxo-alkyl and oxo-aryl;
(ii) a 5-hydroxy-anthranilic acid;
(iii) a 2,3′-dihydroxy pyridine;
(iv) a 2,3-dihydroxy pyridine that is further substituted with one or more substituents selected from the group consisting of alkyl, alkoxy, carboxy, carboxy ester, thioether, alkyl carboxy, alkyl carboxy ester, aryl, sulfonyl alkyl, sulfonyl aryl, formyl, oxo-alkyl and oxo-ary;
(v) a 1,5-dihydroxy napithalene or a 2,3-dihidroxy naphthalene;
(vi) a 1,5-dihydroxy naphthalene or a 2,3-dihydroxy naphthalene that is further substituted with one or more substituents selected from the group consisting of alkyl, alkoxy, carboxy, carboxy ester, thioether, alkyl carboxy, alkyl carboxy ester, aryl, sulfonyl alkyl, sulfonyl aryl, formyl, oxo-alkyl and oxo-aryl;
(vii) a 3,3,3′,3′-tetramethyl-1,1′-spirobisindane-5,5′,6,6′-tetrol;
(viii) a 2-amino-5-dimethylaminosulfonyl-phenol;
and combinations thereof.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/009,717Filed 20 Jan 1998 · continuation
Priority: EP 9520196818 Jul 1995
Granted: 28 Aug 2001
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

G03C 1/49809
Photothermographic systems, e.g. dry silver: organic silver compounds
G03C 1/035
Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein: characterised by the crystal form or…
G03C 1/498
Silver salt compositions other than silver halide emulsions; Photothermographic systems ; Thermographic systems using noble metal compounds:…
G03C 1/49863
Additives: inert additives, e.g. surfactants, binders