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US 6,306,574 B1Granted
Photothermographic material
AssigneeFuji Photo Film Co., Ltd.
InventorsKohzaburoh Yamada, Toshiaki Kubo, Shigeo Hirano
Life of this patent
Estimating the term…
Abstract
In a photothermographic material comprising an organic silver salt, a silver halide, and a reducing agent, a specific hydrazine derivative is contained as a nucleating agent. The material has high sensitivity, high Dmax and good image quality.
Claims24
A photothermographic material comprising an organic silver salt, a silver halide, a hindered phenol reducing agent, and at least one hydrazine derivative of the formula (I):
- wherein R2 is an aliphatic group,
- G1 is selected from the group consisting of —COCO—, —SO2—, —SO—, —P(═O) (—R3)—, thiocarbonyl and iminomethylene,
- R1 is selected from the group consisting of an alkyl, aryl, heterocyclic, alkoxy, aryloxy, amino, alkylamino, arylamino, heterocyclic amino, and hydrazino group, with the proviso that R1 is not an unsubstituted arylamino group when G1 is a thiocarbonyl group,
- A1 and A2 are both hydrogen atoms, or one of A1 and A2 is a hydrogen atom and the other is a substituted or unsubstituted alkylsulfonyl, arylsulfonyl or acyl group, and
- R3 is selected from the group consisting of an alkyl, aryl, heterocyclic, alkoxy, aryloxy, amino, alkylamino, arylamino, heterocyclic amino, and hydrazino group.
2 more elements
A photothermographic material comprising an organic silver salt, a silver halide, a hindered phenol reducing agent, and at least one hydrazine derivative of the formula (II):
- wherein R11 and R12 are independently an aryl or an aromatic heterocyclic group,
- X11 is selected from the group consisting of a hydrogen atom, alkyl, alkenyl, alkynyl, acyl, oxycarbonyl, carbamoyl, heterocyclic, cyano, a group having a bonding oxygen atom, a group having a bonding nitrogen atom, and a group having a bonding sulfur atom,
- R13 is selected from the group consisting of a hydrogen atom, alkyl, aryl, heterocyclic alkyoxy, aryloxy, amino and hydrazine group, and
- A11 and A12 are both hydrogen atoms, or one of A11 and A12 is a hydrogen atom and the other is an alkylsulfonyl, arylsulfonyl or acyl group.
1 more element
A photothermographic material comprising an organic silver salt, a silver halide, a hindered phenol reducing agent, and at least one hydrazine derivative of the following formulae (IV) to (VIII);
- hydrazine derivative of the formula (IV):
- A40—NHNH—R40 (IV)
- wherein A40 is a heterocyclic group having at least one sulfur or oxygen atom, and
- R40 is selected from the group consisting of a formyl, substituted or unsubstituted acyl, sulfonyl, carbamoyl, sulfamoyl, alkoxycarbonyl, thioacyl, and —(C═O)—(C═O) —X40 group wherein X40 is —NR41R42 or —OR43 wherein R41, R42 and R43 are independently selected from the group consisting of a hydrogen atom, substituted or unsubstituted alkyl, aryl and heterocyclic group, or R41 and R42, taken together, may form a ring with the nitrogen atom,
- hydrazine derivative of the formula (V):
- wherein R51 is a monovalent organic group,
- each of R52 and R53 is a hydrogen atom, halogen atom or substituted or unsubstituted alkyl group,
- R54 is selected from the group consisting of a formyl, substituted or unsubstituted acyl, sulfonyl, carbamoyl, sulfamoyl, alkoxycarbonyl, thioacyl, and —(c═O)—(C═O)—X40 group wherein X40 is —NR41R42 or —OR43 wherein R41, R42 and R43 are independently selected from the group consisting of a hydrogen atom, substituted or unsubstituted alkyl, aryl and heterocyclic group, or R41 and R42, taken together, may form a ring with the nitrogen atom,
- hydrazine derivative having a structural moiety of the formula (VI):
- wherein R61 is a divalent organic group,
- each of R62 and R63 is a hydrogen atom, halogen atom or substituted or unsubstituted alkyl group,
- R64 is selected from the group consisting of a formyl, substituted or unsubstituted acyl, sulfonyl, carbamoyl, sulfamoyl, alkoxycarbonyl, thioacyl, and —(C═O)—(C═O) —X40 group wherein X40 is —NR41R42 or —OR43 wherein R41, R42 and R43 are independently selected from the group consisting of a hydrogen atom, substituted or unsubstituted alkyl, aryl and heterocyclic group, or R41 and R42, taken together, may form a ring with the nitrogen atom;
- hydrazine derivative having a structural moiety of the formula (VII):
- wherein R65 is selected from the group consisting of a hydrogen atom, formyl, substituted or unsubstituted acyl, sulfonyl, carbamoyl, sulfamoyl, alkyoxycarbonyl, thioacyl, and —(C═O)—(C═O) —X40 group wherein X40 is —NR41R42 or —OR43 wherein R41, R42 and R43 are independently selected from the group consisting of a hydrogen atom, substituted or unsubstituted alkyl, aryl and heterocyclic group, or R41 and R42, taken together, may form a ring with the nitrogen atom,
- R66 is selected from the group consisting of a hydrogen atom, substituted or unsubstituted acyl, sulfonyl, carbamoyl, sulfamoyl, and alkoxycarbonyl group,
- R67 is a divalent organic group,
- X60 is a phenyl group or pyridine ring, and
- letter m is an integer of 0 to 6;
- and
- hydrazine derivative of the formula (VIII):
- wherein R81 is an aromatic group, A81 is a substituted or unsubstituted aromatic ring, and the carbon atoms of the two carbonyl groups are attached to different atoms of the aromatic ring.
18 more elements
A photothermographic material comprising an organic silver salt, a silver halide, a hindered phenol reducing agent, and at least one hydrazine derivative of the formulae (III):
- wherein R32 is an aliphatic group,
- R31 is an alkyl, aryl or heterocyclic group having at least one electron attractive or donative group,
- A31 and A32 are both hydrogen atoms, or one of A31 and A32 is a hydrogen atom and the other is a substituted or unsubstituted alkylsulfonyl, arylsulfonyl or acyl group.
Dependencies are inferred from the claim text.