Photothermographic material
View Patent ↗The present invention provides a photothermographic material, comprising a photosensitive silver halide, a non-photosensitive organic solvent salt, a reducing agent for a silver ion, and a binder on one face of a support, for being applied by using an organic solvent, the photothermographic material further comprising at least one compound selected from the group of compounds consisting of: a compound represented by the following general formula (1), a compound having a β-lactam ring, a compound having a group that is adsorptive to a silver halide and a group that reduces a silver halide and a precursor thereof:
1. A photothermographic material comprising, on one surface of a support, a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent for a silver ion, and a binder, which are applied to the support using an organic solvent, wherein the photosensitive silver halide has a silver iodide content of 90% by mol to 100% by mol, and the photothermographic material further comprises a compound represented by formula (4):
E-(W)n-F Formula (4)
wherein in formula (4),
E represents an atomic group containing a group that can be adsorbed to a silver halide and E is mercaptotriazole or mercaptotetrazole; W represents a divalent linking group; n represents 0 or 1; and F represents a reducing group derived from a hydroxyurea or a phenidone.
2. The photothermographic material according to claim 1 , wherein the reducing group represented by F in formula (4) is a group derived from a hydroxyurea.
3. The photothermographic material according to claim 1 , wherein an average grain size of the photosensitive silver halide is from 5 nm to 50 nm.
4. The photothermographic material according to claim 1 comprising, as the binder, polyvinyl butyral in an amount of 50% by weight to 100% by weight based on a total binder component in a photosensitive layer which is provided on the support.
5. A photothermographic material comprising, on one surface of a support, a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent for a silver ion, and a binder, which are applied to the support using an organic solvent, wherein a silver iodide content of the photosensitive silver halide is from 90% by mol to 100% by mol and the photothermographic material further comprises a compound represented by formula (1):
wherein in formula (1),
Y represents a hydroxyl group or an —NL 2 L 3 group, in which L 2 and L 3 may be same as or different from each other and each independently represent a hydrogen atom, an alkyl group, or an aryl group;
L 1 represents a sulfur-containing saturated heterocyclic residue, an alkyl group, an aryl group, a hydrogen group, or a group represented by A-S—B in which A represents an alkylene group and B represents a hydrogen atom, an alkyl group, or an aryl group; and
Z represents an atomic group required for forming a 5- or 6-membered carbon ring which may have a substituent.
6. The photothermographic material according to claim 5 , wherein a content of silver iodide in the photosensitive silver halide is from 40% by mol to 100% by mol.
7. The photothermo graphic material according to claim 5 , wherein an average grain diameter of the photosensitive silver halide is from 5 nm to 80 nm.
8. The photothermographic material according to claim 5 , wherein L 1 in formula (1) represents a sulfur-containing saturated heterocyclic residue or a group represented by A-S—B.
9. The photothermographic material according to claim 5 , wherein Z in formula (1) represents an atomic group required for forming a 6-membered carbon ring.
10. The photothermographic material according to claim 5 , wherein Y in formula (1) represents a hydroxyl group.
11. The photothermographic material according to claim 5 comprising, as the binder, polyvinyl butyral in an amount of 50% by weight to 100% by weight based on a total binder component in a photosensitive layer which is provided on the support.
12. The photothermographic material according to claim 1 , wherein the reducing group represented by F in formula (4) is a group derived from a phenidone.