Photothermographic material
View Patent ↗The present invention provides a photothermographic material including a support having disposed thereon an image-forming layer that contains at least a non-photosensitive organic silver salt, a photosensitive silver halide, a reducing agent and a binder, and further including a compound represented by the following formula (I): A-(W)n-P (I) wherein A represents an atomic group having at least two mercapto groups as the substituent; W represents a divalent linking group; n represents 0 or 1; and P represents a pyrazolidone group.
1. A photothermographic materiai comprising a support having disposed thereon an image-forming layer that contains at least a non-photosensitive organic silver salt, a photosensitive silver halide, a reducing agent for an organic silver salt and a binder, and the material further comprising a compound represented by the following formula (I):
A-(W)n-P (I)
wherein A represents an atomic group having at least two mercapto groups as the substituent; W represents a divalent linking group; n represents 0 or 1; and P represents a pyrazolidone group.
2. The photothermographic material according to claim 1 , wherein the atomic group is a group selected from the group consisting of an alkyl group, an aryl group and a heterocyclic group.
3. The photothermographic material according to claim 1 , wherein the atomic group is a heterocyclic group.
4. The photothermographic material according to claim 1 , wherein the atomic group is an aromatic nitrogen-containing heterocyclic group.
5. The photothermographic material according to claim 2 , wherein the atomic group is an aromatic nitrogen-containing heterocyclic group.
6. The photorhermographic material according to claim 1 , wherein the pyrazolidone group is a group obtained by removing a hydrogen atom from a compound represented by the following formula (P-2):
wherein Y represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group; X represents a hydrogen atom, an alkyl group, an acyl group, a carbamoyl group, an alkoxycarbonyl group, an alkylsulfonyl group or an arylsulfonyl group; R 10 , R 11 , R 12 and R 13 each represent a hydrogen atom or a stibstituent; and wherein at least one of Y, X, R 10 , R 11 , R 12 and R 13 is a hydrogen atom.
7. The photothermographic material according to claim 2 , wherein the pyrazolidone group is a group obtained by removing a hydrogen atom from a compound represented by the following formula (P-2):
wherein Y reprcscnts a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group; X represents a hydrogen atom, an alkyl group, an acyl group, a carbamoyl group, an alkoxycarbonyl group, an alkylsulfonyl group or an arylsulfonyl group; R 10 , R 11 , R 12 and R 13 each represent a hydrogen atom or a substituent; and wherein at least one of Y, X, R 10 , R 11 , R 12 and R 13 is a hydrogen atom.
8. The photothermographic material according to claim 1 , wherein the pyrazolidone group is a 1-phenyl-3-pyrazolidone group.
9. The photothermographic material according to claim 2 , wherein the pyrazolidone group is a 1-phenyl-3-pyrazolidone group.
10. The photothermographic material according to claim 1 , wherein the photosensitive silver halide has a silver iodide content ranging from 40% by inol to 100% by mol.
11. The photothermographic matcrial according to claim 2 , wherein the photosensitive silver halide has a silver iodide content ranging from 40% by mol to 100% by mol.
12. The photothermographic material according to claim 1 , wherein the compound represented by formula (I) is added in an amount ranging from 1×10 −6 mol, per mol of the photosensitive silver halide.
13. The photothermographic material according to claim 2 , wherein the compound represented by formula (I) is added in an amount ranging from 1×10 −6 mol to 1 mol, per mol of the photosensitive silver halide.
14. The photothermographic material according to claim 1 , wherein the reducing agent is a hindered phenol reducing agent or a bisphenol reducing agent.
15. The photothermographic material according to claim 2 , wherein the reducing agent is a hindered phenol reducing agent or a bisphenol reducing agent.
16. The photothermographic material according to claim 1 , further comprising a hydrogen bond-forming compound represented by the following formula (D):
wherein R 21 , R 22 , and R 23 each independently represent an optionally substituted alkyl, aryl, alkoxy, aryloxy, amino, or heterocyclic group.
17. The photothermographic material according to claim 2 , further comprising a hydrogen bond-forming compound represented by the following formula (D):
wherein R 21 , R 22 , and R 23 each independently represent an optionally substituted alkyl, aryl, alkoxy, aryloxy, amino, or heterocyclic group.