Photothermographic material

Abstract

The present invention provides a photothermographic material having, on one side of a support, an image forming layer including at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent, and a binder, and at least one non-photosensitive layer which is disposed on the same side of the support as the image forming layer and farther from the support than the image forming layer, wherein the non-photosensitive layer includes at least a copolymer latex of an acrylate or methacrylate having a fluorine atom and a monomer component having a hydrophobic group, and the surface of the side having the image forming layer includes convex portions having a height of 1.5 μm or higher in an amount of from 20 to 2000 per 1 mm2. A photothermographic material which exhibits excellent film physical properties and high image quality is provided.

Description

Claims

1. A photothermographic material comprising, on one side of a support, an image forming layer comprising at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent, and a binder, and at least one non-photosensitive layer which is disposed on the same side of the support as the image forming layer and farther from the support than the image forming layer, wherein the non-photosensitive layer comprises at least a copolymer latex of an acrylate or methacrylate having a fluorine atom and a monomer component having a hydrophobic group, and the surface of the side having the image forming layer comprises convex portions having a height of 1.5 μm or higher in an amount of from 20 to 2000 per 1 mm2.

2. The photothermographic material according to claim 1, wherein the acrylate or methacrylate having a fluorine atom is represented by the following formula (1):

3. The photothermographic material according to claim 1, wherein the monomer component having a hydrophobic group is represented by the following formula (2):

4. The photothermographic material according to claim 1, wherein the non-photosensitive layer comprises a matting agent having a mean particle size of from 2.0 μm to 8.0 μm.

5. The photothermographic material according to claim 4, wherein a content of the matting agent is from 0.0001 g/m2 to 0.08 g/m2.

6. The photothermographic material according to claim 1, wherein an F1S/C1S ratio of the surface on the side having the image forming layer is 2.0 or more.

7. The photothermographic material according to claim 1, wherein the photothermographic material further comprises a non-photosensitive layer containing an organic silver salt, which is different from the non-photosensitive organic silver salt contained in the image forming layer, on the same side of the support as the image forming layer and farther from the support than the image forming layer.

8. The photothermographic material according to claim 7, wherein the photothermographic material comprises the non-photosensitive layer containing an organic silver salt between the image forming layer and the non-photosensitive layer containing the copolymer latex of an acrylate or methacrylate having a fluorine atom and a monomer component having a hydrophobic group.

9. The photothermographic material according to claim 1, wherein the image forming layer further comprises a polymer latex having a monomer component represented by the following formula (M): CH2═CR01—CR02═CH2  Formula (M)wherein R01 and R02 each independently represent one selected from a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a halogen atom, or a cyano group.

10. The photothermographic material according to claim 9, wherein, in formula (M), both of R01 and R02 are a hydrogen atom, or one of R01 or R02 is a hydrogen atom and the other is a methyl group.

11. The photothermographic material according to claim 1, wherein the photothermographic material comprises a dye represented by the following formula (PC-1):

12. The photothermographic material according to claim 11, wherein, in formula (PC-1), at least one of R1, R4, R5, R8, R9, R12, R13, and R16 is a group represented by formula (II): -L1-R17  Formula (II)wherein L1 represents one selected from **—SO2—*, **—SO3—*, **—SO2NRN—*, **—SO—*, **—CO—*, **—CONRN—*, **—COO—*, **—COCO—*, **—COCO2—*, or **—COCONRN—*; ** denotes a bond with a phthalocyanine skeleton at this position; * denotes a bond with R17 at this position; RN represents one selected from a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, an acyl group, an alkoxycarbonyl group, a carbamoyl group, a sulfonyl group, or a sulfamoyl group; and R17 represents one selected from a hydrogen atom, an alkyl group, an aryl group, or a heterocyclic group.

13. The photothermographic material according to claim 12, wherein, in formula (PC-1), four or more from among R1, R4, R5, R8, R9, R12, R13, and R16 are each independently a group represented by formula (II).

14. The photothermographic material according to claim 12, wherein, in formula (PC-1), R2, R3, R6, R7, R10, R11, R14, and R15 are each a hydrogen atom, and at least one of R1, R4, R5, R8, R9, R12, R13, and R16 is a group represented by formula (II).

15. The photothermographic material according to claim 14, wherein, in formula (PC-1), four or more from among R1, R4, R5, R8, R9, R12, R13, and R16 are each independently a group represented by formula (II).

16. The photothermographic material according to claim 11, wherein the dye represented by formula (PC-1) is a water-soluble dye.

17. The photothermographic material according to claim 11, wherein the dye represented by formula (PC-1) is contained in at least one layer on the side of the support having the image forming layer.

18. The photothermographic material according to claim 11, wherein the dye represented by formula (PC-1) is contained in at least one layer on the backside of the support.