Thermographic recording element
AssigneeFuji Photo Film Co., Ltd.
InventorsKohzaburoh Yamada, Toshiaki Kubo, Hiroyuki Suzuki
Life of this patent
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Abstract
A thermographic recording element having at least one image forming layer contains an organic silver salt, a reducing agent, and optionally, a photosensitive silver halide. The element further contains a substituted alkene derivative of specific structure and preferably a specific hydrazine derivative. The element can be processed in a fully dry basis to produce images having high Dmax and gradation and free of black pepper.
Claims8
A thermographic recording element having at least one image forming layer, said element comprising an organic silver salt, a reducing agent, and at least one of substituted alkene derivatives of formula (14):
- wherein W is an electron attractive group;
- D is an electron donative group selected from the group consisting of hydroxy groups, salts of hydroxy groups, mercapto groups, salts of mercapto groups, alkoxy groups, alkylthio groups, arylthio groups, amino groups, alkylamino groups, arylamino groups and phenyl groups having an electron donative group as a substituent;
- H is hydrogen;
- and two of said W groups form a cyclic structure which is substituted or unsubstituted and is selected from the group consisting of saturated carbocyclic, unsaturated carbocyclic, saturated heterocyclic, unsaturated heterocyclic and cyclic ketone, and wherein said W groups may have substituents.
A thermographic recording element having at least one image forming layer, said element comprising
- an organic silver salt, a reducing agent, and at least one of substituted alkene derivatives of formula (14):
- wherein W is an electron attractive group;
- D is an electron donative group selected from the group consisting of hydroxy groups, salts of hydroxy groups, mercapto groups, salts of mercapto groups, alkoxy groups, alkylthio groups, arylthio groups, amino groups, alkylamino groups, arylamino groups and phenyl groups having an electron donative group as a substituent;
- H is hydrogen;
- and two of said W groups form a cyclic structure which is substituted or unsubstituted and is selected from the group consisting of saturated carbocyclic, unsaturated carbocyclic, saturated heterocyclic, unsaturated heterocyclic and cyclic ketone, and wherein said W groups may have substituents;
- and
- a hydrazine derivative of the formula (I):
- wherein R2 is an aliphatic, aromatic or heterocyclic group, R1 and R3 are independently hydrogen, aliphatic group, aromatic group, heterocyclic group, hydrazino group, alkoxy group, aryloxy group, or amino group, G1 is —CO—, —COCO—, —C(═S)—, SO2—, —SO—, —PO(R3)— or iminomethylene group, A1 and A2 are independently hydrogen, alkylsulfonyl, arylsulfonyl or acyl groups, at least one of A1 and A2 is hydrogen, and letter m1 is equal to 0 or 1, with the proviso that R1 is an aliphatic, aromatic or heterocyclic group when m1 is 0.
Dependencies are inferred from the claim text.