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Emulsion and material cntaining triazine-thioketone compound for heat development material

A thermal development, compound technology, applied in the direction of emulsified silver emulsion, photosensitive material, photography, etc., can solve the problem of unpredictable whether it will produce beneficial effects or harmful effects.

Inactive Publication Date: 2004-08-04
EASTMAN KODAK CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These additives, such as stabilizers, antifoggants, sensitivity enhancers, supersensitizers and spectral and chemical sensitizers, can be introduced into conventional photographic materials, but it is impossible to predict whether these additives will be used in photothermographic materials. Will there be beneficial or harmful effects
For example, photographic antifoggants used in conventional photographic materials produce various types of fog when introduced into photothermographic imaging materials, or supersensitizers effective for photographic materials are used in photothermographic imaging materials. It is not uncommon to see no effect in the image material

Method used

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  • Emulsion and material cntaining triazine-thioketone compound for heat development material
  • Emulsion and material cntaining triazine-thioketone compound for heat development material
  • Emulsion and material cntaining triazine-thioketone compound for heat development material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6

[0332] Preparation of benzotriazole silver salt dispersion:

[0333] To the stirred reaction vessel was added 85 g of alkali-processed gelatin, 25 g of phthalylated gelatin, and 2000 g of deionized water. A solution was prepared containing 185 g of benzotriazole, 1405 g of deionized water and 680 g of 2.5 mol sodium hydroxide (solution B). Solution B was added and 2.5 mol sodium hydroxide solution was added as needed to adjust the pAg value of the mixture in the reaction vessel to 7.25 and the pH value to 8.0 and maintain it at a temperature of 36°C. Flow=16(1+0.002t 2 )ml / min (wherein t is time, min), according to this formula, add the solution (solution C) that contains 228.5g silver nitrate and 1222g deionized water to the reaction vessel in the mode that flow rate increases gradually, add solution B simultaneously to make pAg The value remains at 7.25. The addition process was terminated when the solution C was completely consumed. At this time, 80 g of phthalylated g...

Embodiment 7-9

[0372] The following examples demonstrate the use of the triazine-thione compounds of this invention in thermographic materials.

[0373] Preparation of thermal imaging material:

[0374] Thermographic emulsion and overcoat formulations containing the ingredients of Tables IV and V were prepared. The thermal imaging formulation was coated on a 7 mil (178 μm) clear light blue poly(ethylene terephthalate) sheet using a conventional air knife coater and then heated at 95°F (35°C) Dry at 7.5min. The overcoat formulation was coated onto the dried thermographic layer and then dried also at 95°F (35°C) for 7.5 minutes.

[0375] TABLE IV - Thermographic Emulsion Layers

[0376] Component Dry Coating Weight

[0377] Alkaline gelatin 3.20g / m2

[0378] Benzotriazole Silver 3.70g / m 2

[0379] Sodium benzotriazole 0.88g / m 2

[0380] 3-Methylbenzothiazolium iodide 0.07g / m 2

[0381] Table V - Overcoa...

Embodiment

[0394] Example Triazine-thione Compound Unimaged Density Imaged Density

[0395] 7 I-1 0.20 2.39

[0396] 8 I-24 0.20 2.29

[0397] 9 I-35 0.20 2.53

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Abstract

Thermally developable compositions such thermographic and photothermographic emulsions include certain triazine-thione compounds. These emulsions can be used in thermally developable materials such as thermographic and photothermographic materials to provide increased image density and shortened development time, and to allow development at lower temperatures. Such materials can have imaging layers on one or both sides of the support.

Description

technical field [0001] This invention relates to thermally developable compositions and imaging elements comprising certain triazine-thione compounds. In particular, the invention relates to thermographic and photothermographic elements containing triazine-thione compounds. The invention also relates to methods of imaging thermally developable materials. Background technique [0002] Silver-containing thermographic and photothermographic elements that are imaged and / or developed by thermal processing rather than liquid processing (ie, thermodevelopable imaging elements) have been available for many years. [0003] Silver-containing thermographic materials are non-photosensitive materials used in recording processes that utilize thermal energy to produce images. These materials typically comprise a support loaded with (a) a source of reducible silver ions that is less or not at all photosensitivity, (b) a reducing composition (typically including a developer) that can reduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03C1/46G03C1/498G03C5/08G03C5/17
CPCG03C1/49845G03C1/49818G03C1/49872G03C1/49809G03C1/49863G03C1/49827Y10S430/166Y10S430/167G03C1/49881G03C5/17G03C1/46G03C1/0051G03C1/04G03C1/825G03C2001/7635G03C2005/168G03C2200/43
Inventor D·C·林奇S·M·乌尔里希P·G·斯库
Owner EASTMAN KODAK CO
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