Claims
- 1. A substantially light-insensitive thermographic recording material comprising a support and a thermosensitive element, said thermosensitive element containing silver behenate including phase I silver behenate having an X-ray diffraction spectrum upon irradiation with a copper Kα1 X-ray source with Bragg angles 2Θ of 4.53%, 5.96-6.05°, 7.46-7.56°, 8.90-9.12°, 10.45-10.66°, 12.02-12.12°, 13.53-13.62°, a reducing agent therefor in thermal working relationship therewith and a binder, wherein said thermographic recording material is capable upon thermal development of containing 1% of phase II silver behenate, having an X-ray diffraction spectrum upon irradiation with a copper Kα1 X-ray source with Bragg angles 2Θ of 5.34-5.78°, 6.12-6.41°, 7.68-7.79°, 830-8.59°, 9.36-9.84°, 10.6-10.96°, which is stable at 25° C., with respect to said phase I silver behenate present in said thermographic recording material before said thermal development.
- 2. Thermographic recording material according to claim 1, wherein upon thermal development said thermographic recording material contains at least 2% of said phase II silver behenate, which is stable at 25° C., with respect to said phase I silver behenate present in said thermographic recording material before said thermal development.
- 3. Thermographic recording material according to claim 1, wherein upon thermal development said thermographic recording material contains at least 5% of said phase II silver, which is stable at 25° C., with respect to said phase I silver behenate present in said thermographic recording material before said thermal development.
- 4. Thermographic record material according to claim 1, wherein said reducing agent is 3,4-dihydroxybenzonitrile.
- 5. Thermographic recording material according to claim 4, wherein the concentration of said 3,4-dihydroxybenzonitrile is at least 30 mol % with respect to said silver behenate.
- 6. Thermographic recording material according to claim 4, wherein ethyl 3,4-dihydroxybenzoate is present as a further reducing agent.
- 7. Thermographic recording material according to claim 1, wherein said phase II silver behenate is stabilized by the presence of a compound selected from the group consisting of glutaric acid, benzo[e][1,3]oxazine-2,4-dione, substituted benzo[e][1,3]oxazine-2,4-dione compounds, phthalazinone and polyvinyl butyral.
- 8. Thermographic recording material according to claim 7, wherein said a substituted benzo[e][1,3oxazine-2,4-dione compound is selected from the group consisting of 7-(ethylcarbonato)-benzo[e][1,3]-oxazine-2,4-dione, 7-methyl-benzo[e][1,3]-oxazine-2,4-dione and 7-methoxy-benzo[e][1,3]-oxazine-2,4-dione.
- 9. Thermographic recording material according to claim 7, wherein said a substituted benzo[e][1,3]oxazine-2,4-dione compound is selected from the group consisting of 7-(ethylcarbonato)-benzo[e][1,3]-oxazine-2,4-dione, 7-methyl-benzo[e][1,3]-oxazine-2,4-dione and 7-methoxy-benzo[e][1,3]-oxazine-2,4-dione.
- 10. Thermographic recording material according to claim 1, wherein said thermographic recording material is a black and white thermographic recording material.
- 11. Thermographic recording material according to claim 1, wherein said thermosensitive element is provided with a protective layer.
- 12. A recording process for a thermographic recording material, said thermographic recording material comprising a thermosensitive element, said thermosensitive element comprising silver behenate including the phase I silver behenate defined in claim 1, an organic reducing agent therefor in thermal working relationship therewith and a binder, comprising: (i) converting said silver behenate into the phase II silver behenate defined in claim 1; and (ii) cooling said thermographic recording material to 25° C., wherein at least 1% with respect to said phase I silver behenate of said phase II silver behenate, with respect to the quantity of said phase I silver behenate in said thermographic recording material before said recording process, is present in said cooled thermally developed thermographic recording material at 25° C. as stable phases.
- 13. Recording process according to claim 12, wherein said recording process further comprises thermal development at a line time of less than 20 ms with an image resolution of at least 118 dots per cm.
- 14. Recording process according to claim 12, wherein said recording process further comprises thermal development at a time of less than 20 ms with an image resolution of at least 118 dots per cm.
- 15. A process for using the phase II silver behenate defined in claim 1 stabilized at 25° C. as a tone modifier in thermographic recording materials comprising the steps of: producing a coating dispersion containing silver behenate as defined in claim 1, a reducing agent therefor, a binder and an substance which stabilizes said phase II silver behenate at 25° C.; and coating said coating dispersion onto a support.
- 16. A substantially light-insensitive thermographic recording material comprising a support and a thermosensitive element, said thermosensitive element containing silver behenate including phase I silver behenate having an X-ray diffraction spectrum upon irradiation with a copper Kα1 X-ray source with Bragg angles 2Θ of 4.53°, 5.96-6.05°, 7.46-7.56°, 8.90-9.12°, 10.45-10.66°, 12.02-12.12°, 13.53-13.62°, a reducing agent therefor in thermal working relationship therewith and a binder, wherein said thermographic recording material is capable upon thermal development of containing 1% with respect to said phase I silver behenate of phase III silver behenate phase, having an X-ray diffraction spectrum upon irradiation with a copper Kα1 X-ray source with Bragg angles 2Θ of 4.76-4.81°, 5.9-6.3°, 6.76-7.35°, 8.27-8.44° and 9.06-9.43% which is stable at 25° C., with respect to the quantity of said phase I silver behenate in said thermographic recording material before said thermal development.
- 17. Thermographic recording material according to claim 16, wherein upon thermal development said thermographic recording material contains at least 2% of said phase III silver behenate, which is stable at 25° C., with respect to said phase I silver behenate present in said thermographic recording material before said thermal development.
- 18. Thermographic recording material according to claim 16, wherein upon thermal development said thermographic recording material contains at least 5% of said phase III silver behenate, which is stable at 25° C., with respect to said phase I silver behenate present in said thermographic recording material before said thermal development.
- 19. Thermographic recording material according to claim 16, wherein said phase III silver behenate is stabilized by the presence of a compound selected from the group consisting of: glutaric acid, benzo[e][1,3]oxazine-2,4-dione substituted benzo[e][1,3]oxazine-2,4-dione compounds, phthalazinone and polyvinyl butyral.
- 20. Thermographic recording material according to claim 19, wherein said a substituted benzo[e][1,3]oxazine-2,4-dione compound is selected from the group consisting of 7-(ethylcarbonato)-benzo[e][1,3]-oxazine-2,4-dione, 7-methyl-benzo[e][1,3]-oxazine-2,4-dione and 7-methoxy-benzo[e][1,3]-oxazine-2,4-dione.
- 21. A recording process for a thermographic recording material, said thermographic recording material comprising a thermosensitive element, said thermosensitive element comprising silver behenate including the phase I silver behenate defined in claim 16, organic reducing agent therefor in thermal working relationship therewith and a binder, comprising: (i) converting said silver behenate into the phase III silver behenate defined in claim 16; (ii) cooling said thermographic recording material to 25° C., wherein at least 1% of said phase Ill silver behenate, with respect to the quantity of said phase I silver behenate in said thermographic recording material before said recording process, is present in said cooled thermally developed thermographic recording material at 25° C. as stable phases.
- 22. Recording process according to claim 21, wherein said recording process further comprises thermal development at a line time of less than 20 ms with an image resolution of at least 118 dots per cm.
- 23. A process for using the phase III silver behenate defined in claim 16, stabilized at 25° C. as a tone modifier in thermographic recording materials comprising the steps of: producing a coating dispersion containing silver behenate as defined in claim 1, a reducing agent therefor, a binder and art substance which stabilizes said phase III silver behenate at 25° C.; and coating said coating dispersion onto a support.
- 24. Thermographic recording material according to claim 16, wherein said reducing agent is 3,4-dihydroxybenzonitrile.
- 25. Thermographic recording material according to claim 16, wherein said thermographic recording material is a black and white thermographic recording material.
- 26. Thermographic recording material according to claim 16, wherein said thermosensitive element is provided with a protective layer.
- 27. A substantially light-insensitive thermographic recording material comprising a support and a thermosensitive element, said thermosensitive element containing silver behenate including phase I silver behenate having an X-ray diffraction spectrum upon irradiation with a copper Kα1 X-ray source with Bragg angles 2Θ of 4.53°, 5.96-6.05°, 7.46-7.56°, 8.90-9.12°, 10.45-10.66°, 12.02-12.12°, 13.53-13.62°, a reducing agent therefor in thermal working relationship therewith and a binder, wherein said thermographic recording material is capable upon thermal development of containing 1% of phase II silver behenate, having an X-ray diffraction spectrum upon irradiation with a copper Kα1 X-ray source wit Bragg angles 2Θ of 5.34-5.78°, 6.12-6.41°, 7.68-7.79, 8.30-8.59°, 9.36-9.40°, 10.6-10.96°, which is stable at 25° C. and phase III silver behenate phase, having an X-ray diffraction spectrum upon irradiation with a copper Kα1 X-ray source with Bragg angles 2Θ of 4.76-4.81°, 5.9-6.3°, 6.76-7.35°, 8.27-8.44° and 9.06-9.43°, which is stable at 25° C., with respect to the quantity of said phase I silver behenate in said thermographic recording material before said thermal development.
- 28. Thermographic recording material according to claim 27, wherein upon thermal development said thermographic recording material contains at least 2% of said phase II silver behenate which is stable at 25° C. and said phase III silver behenate which is stable at 25° C., taken together with respect to said phase I silver behenate present in said thermographic recording material before said thermal development.
- 29. Thermographic recording material according to claim 27, wherein upon thermal development said thermographic recording material contains at least 5% with respect to said phase I silver behenate of said phase II silver behenate which is stable at 25° C. and said phase II silver behenate, which is stable at 25° C., taken together with respect to said phase I silver behenate present in said thermographic recording material before said thermal development.
- 30. A recording process for a thermographic recording material, said thermographic recording material comprising a thermosensitive element, said thermosensitive element comprising silver behenate including the phase I silver behenate defined in claim 27, organic reducing agent therefor in thermal working relationship therewith and a binder, comprising: (i) converting said silver behenate into the phase II silver behenate defined in claim 27 the phase III silver behenate defined in claim 27; and (ii) cooling said thermographic recording material to 25° C., wherein at least 1% of said phase II silver behenate and said phase III silver behenate, with respect to the quantity of said phase I silver behenate in said thermographic recording material before said recording process, is present in said cooled thermally developed thermographic recording material at 25° C. as stable phases.
- 31. Recording process according to claim 30, wherein said recording process further comprises thermal development at a line time of less than 20 ms with an image resolution of at least 118 dots per cm.
- 32. Thermographic recording material according to claim 27, wherein said reducing agent is 3,4-dihydroxybenzonitrile.
- 33. Thermographic recording material according to claim 27, wherein said phase II silver behenate is stabilized by the presence of a compound selected from the group consisting of: glutaric acid, benzo[e][1,3]oxazine-2,4-dione, substituted benzo[e][1,3]oxazine-2,4-dione compounds, phthalazinone and polyvinyl butyral.
- 34. Thermographic recording material according to claim 27, wherein said phase III silver behenate is stabilized by the presence of a compound selected from the group consisting of: glutaric acid, benzo[e][1,3]oxazine-2,4-dione, substituted benzo[e][1,3]oxazine-2,4-dione compounds, phthalazinone and polyvinyl butyral.
- 35. Thermographic recording material according to claim 34, wherein said a substituted benzo[e][1,3]oxazine-2,4-dione compound is selected from the group consisting of 7-(ethylcarbonato)-benzo[e][1,3]-oxazine-2,4-dione, 7-methyl-benzo[e][1,3]-oxazine-2,4-dione and 7-methoxy-benzo[e][1,3]-oxazine-2,4-dione.
- 36. Thermographic recording material according to claim 27, wherein said thermographic recording material is a black and white thermographic recording material.
- 37. Thermographic recording material according to claim 27, wherein said thermosensitive element is provided with a protective layer.
Priority Claims (2)
Number |
Date |
Country |
Kind |
00201851 |
May 2000 |
EP |
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00203167 |
Sep 2000 |
EP |
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Parent Case Info
This application claims the benefit of U.S. provisional patent application No. 60/243,585, filed Oct. 27, 2000.
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Provisional Applications (1)
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Number |
Date |
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60/243585 |
Oct 2000 |
US |