Claims
- 1. A substantially light-insensitive black and white monosheet thermographic recording material comprising a support and a thermosensitive element, said thermosensitive element comprising a substantially light-insensitive organic silver salt, a 1, 2-dihydroxyphenyl-compound in thermal working relationship therewith and a binder, wherein said 1, 2-dihydroxyphenyl-compound is represented by formula (I): ##STR9## where R is --P(.dbd.O)R.sup.1 R.sup.2, --SO.sub.x R.sup.3, --CN, --NO.sub.2 or --CR.sup.4 .dbd.NR.sup.5 when n is 0; R is --P(.dbd.O)R.sup.1 R.sup.2, --SO.sub.x R.sup.3, --CN, --NO.sub.2, --CR.sup.4 .dbd.NR.sup.5 or --COR.sup.6 when n is an integer; R.sup.1 and R.sup.2 are independently an alkyl, an aryl, an alkoxy, an aryloxy, a hydroxy or an amino group; R.sup.3 is an alkyl, an aryl or an amino group; R.sup.4 is an alkyl or an aryl group or hydrogen; R.sup.5 is an alkyl, an aryl, a hydroxy, an alkoxy, an aryloxy, an acyl or an amino group; R.sup.6 is an alkyl, an aryl, an alkoxy, an aryloxy, a hydroxy or an amino group or hydrogen; x is 1, 2, or 3; and the benzene ring of the 1, 2-dihydroxyphenyl-compound represented by the formula (I) may be further substituted with halogen atoms, aryl groups, alkyl groups, and the atoms necessary to form an annulated carbocyclic or heterocyclic ring.
- 2. Substantially light-insensitive black and white monosheet thermographic recording material according to claim 1, wherein said 1,2-dihydroxyphenyl-compound is represented by the following formula: ##STR10##
- 3. Substantially light-insensitive black and white monosheet thermographic recording material according to claim 1, wherein said 1,2-dihydroxyphenyl-compound is represented by the following formula:
- 4. Substantially light-insensitive black and white monosheet thermographic recording material according to claim 1, wherein said 1,2-dihydroxyphenyl-compound is represented by the following formula:
- 5. Substantially light-insensitive black and white monosheet thermographic recording material according to claim 1, wherein said thermosensitive element further contains at least one polycarboxylic acid and/or anhydride thereof in a molar percentage of at least 15 with respect to said substantially light-insensitive organic silver salt and in thermal working relationship therewith.
- 6. Substantially light-insensitive black and white monosheet thermographic recording material according to claim 1, wherein said thermosensitive element is provided with a protective layer.
- 7. Substantially light-insensitive black and white monosheet thermographic recording material according to claim 1, wherein said substantially light-insensitive organic silver salt is a silver salt of an organic carboxylic acid.
- 8. A substantially light-insensitive black and white monosheet thermographic recording material comprising a support and a themnosensitivc element, said thermosensitive element comprising a substantially light-insensitive organic silver salt, a 1, 2-dihydroxyphenyl-compound in thermal working relationship therewith and a binder, wherein said 1,2-dihydroxyphenyl-compound is selected from the group consisting of: aryl (3,4-dihydroxyphenyl) sulfinates, alkyl (3,4-dihydroxyphenyl) sulfinates, 3,4-dihydroxyphenyl-alkylsulfones, 3,4-dihydroxyphenyl-arylsulfones, aryl (3,4-dihydroxyphenyl) sulfonates, alkyl (3,4-dihydroxyphenyl) sulfonates and 3,4-dihydroxybenzonitrile compounds.
- 9. Substantially light-insensitive black and white monosheet thermographic recording material according to claim 8, wherein said 1,2-dihydroxyphenyl-compound is represented by the following formula:
- 10. Substantially light-insensitive black and white monosheet thermographic recording material according to claim 8, wherein said 1,2-dihydroxyphenyl-compound is represented by the following formula:
- 11. Substantially light-insensitive black and white monosheet thermographic recording material according to claim 8, wherein said 1,2-dihydroxyphenyl-compound is represented by the following formula:
- 12. Substantially light-insensitive black and white monosheet thermographic recording material according to claim 8, wherein said thermosensitive element further contains at least one polycarboxylic acid and/or anhydride thereof in a molar percentage of at least 15 with respect to said substantially light-insensitive organic silver salt and in thermal working relationship therewith.
- 13. Substantially light-insensitive black and white monosheet thermographic recording material according to claim 8, wherein said thermosensitive element is provided with a protective layer.
- 14. Substantially light-insensitive black and white monosheet thermographic recording material according to claim 8, wherein said substantially light-insensitive organic silver salt is a silver salt of an organic carboxylic acid.
- 15. A process for producing a substantially light-insensitive black and white monosheet thermographic recording material, including a support and a thermosensitive element, said thermosensitive element comprising a substantially light-insensitive organic silver salt, a 1,2-dihydroxyphenyl-compound in thermal working relationship therewith and a binder, the process comprising preparing one or more aqueous coating compositions together containing said substantially light-insensitive organic silver salt, said 1,2-dihydroxyphenyl-compound and said binder; and applying said one or more aqueous coating compositions to the same side of said support thereby forming after drying said thermosensitive element, wherein said 1,2-dihydroxyphenyl-compound is represented by formula (I): where R is --P(.dbd.O)R.sup.1 R.sup.2, --SO.sub.x R.sup.3, --CN, --NO.sub.2 or --CR.sup.4 .dbd.NR.sup.5 when n is 0; R is --P(.dbd.O)R.sup.1 R.sup.2, --SO.sub.x R.sup.3, --CN, --NO.sub.2, --CR.sup.4 .dbd.NR.sup.5 or --COR.sup.6 when n is an integer; R.sup.1 and R.sup.2 are independently an alkyl, an aryl, an alkoxy, an aryloxy, a hydroxy or an amino group; R.sup.3 is an alkyl, an aryl or an amino group; R.sup.4 is an alkyl or an aryl group or hydrogen; R.sup.5 is an alkyl, an aryl, a hydroxy, an alkoxy, an aryloxy, an acyl or an amino group; R.sup.6 is an alkyl, an aryl, an alkoxy, an aryloxy, a hydroxy or an amino group or hydrogen; x is 1, 2, or 3; and the benzene ring of the 1,2-dihydroxyphenyl-compound represented by the formula (I) may be further substituted with halogen atoms, aryl groups, alkyl groups, and the atoms necessary to form an annulated carbocyclic or heterocyclic ring.
- 16. A process for producing a substantially light-insensitive black and white monosheet thermographic recording material, including a support and a thermosensitive element, said thermosensitive element comprising a substantially light-insensitive organic silver salt, a 1,2-dihydroxyphenyl-compound in thermal working relationship therewith and a binder, the process comprising preparing one or more aqueous coating compositions together containing said substantially light-insensitive organic silver salt, said 1, 2-dihydroxyphenyl-compound and said binder; and applying said one or more aqueous coating compositions to the same side of said support thereby forming after drying said thermosensitive element, wherein said 1,2-dihydroxyphenyl-compound is selected from the group consisting of: aryl (3,4-dihydroxyphenyl) sulfinates, alkyl (3,4-dihydroxyphenyl) sulfinates, 3,4-dihydroxyphenyl-alkylsulfones, 3,4-dihydroxyphenyl-arylsulfones, aryl (3,4-dihydroxyphenyl) sulfonates, alkyl (3,4-dihydroxyphenyl) sulfonates and 3,4-dihydroxybenzonitrile compounds.
Priority Claims (1)
Number |
Date |
Country |
Kind |
97202872 |
Sep 1997 |
EPX |
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Parent Case Info
The application claims the benefit of U.S. Provisional Application No. 60/069,214 filed Dec. 11, 1997.
Foreign Referenced Citations (2)
Number |
Date |
Country |
0248405 |
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EPX |
0599580 |
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EPX |