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Heat developing emulsion and material contg. 2,3-phthalazine compound

A kind of naphthalene, compound technology, applied in the field of thermally developable compositions and imaging materials, can solve the problem of poor washout latitude and the like

Inactive Publication Date: 2004-05-26
EASTMAN KODAK CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] Another problem encountered with the use of phthalazine compounds in thermally developable materials is their poor process latitude

Method used

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  • Heat developing emulsion and material contg. 2,3-phthalazine compound
  • Heat developing emulsion and material contg. 2,3-phthalazine compound
  • Heat developing emulsion and material contg. 2,3-phthalazine compound

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0307] The preparation method of compound II-1 is as follows: 95.97g (0.457mol) bisvinylsulfonylmethane is dissolved in 700ml warm methanol, and the insoluble matter is removed by filtration; 121.73g (0.935mmol) 2,3-naphthyridine is dissolved In 250 ml methanol, this solution was filtered and then added to the previous solution. Sufficient methanol was added to bring the solution to a final volume of 1400 ml and the solution was left to crystallize at room temperature. After 5 h the product was filtered, washed with 50 ml of methanol and dried to obtain 212.98 g of compound II-1.

[0308] The structures of all compounds were confirmed by proton NMR and mass spectral data.

[0309] Preparation of benzotriazole silver salt dispersion:

[0310] 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....

Embodiment 1-3

[0338] The examples shown in Table II below show that adding the phthalazine compound of the present invention to the photothermographic material greatly improves the sensitivity of the material. Moreover, after prolonging the flushing time from 15s to 20s, the increment of Dmin is small, from which it can be seen that the thermal flushing tolerance of 2,3-naphthyridine compounds is better.

[0339] All samples were developed by heating at 150°C for 15 or 20 seconds, and the resulting black images were obtained.

[0340] "PHZ" refers to phthalazine. This compound is outside the scope of the present invention and is used as a comparative example.

[0341] Table II

[0342] Control sample 1 Control sample 2 Example 1 Example 2 Example 3

[0343]Toner Compound None PHZ I-1 II-1 I-2

[0344] rinse time

[0345] 15s D min 0.263 0.304 0.293 0.280 0.278

[0346] D. max 2.18...

Embodiment 4-8

[0360] The examples shown in Table III below show that different capping groups R 1 and R 2 Substituents and counter ions X - The 2,3-naphthyridine compound of the present invention has better film stability after natural aging at 21° C. and 40% relative humidity for 7 days.

[0361] All samples were developed by heating at 150°C for 20 seconds, and black images were obtained.

[0362] "PHZ" refers to 2,3-naphthyridine, while "6-CH 3 PHZ" refers to 6-methyl-2,3-naphthyridine. These two compounds do not belong to the scope of the present invention, and they are used as comparison

[0363] Example.

[0364] Table III

[0365] Control sample 2 Control sample 3 Example 4 Example 5 Example 6 Example 7 Example 8

[0366] Toner compound PHZ 6-CH 3 PHZ I-1 I-3 I-5 I-6 I-7

[0367] Initial value (new system) D min 0.329 0.367 0.306 0.297 0.261 0.281 0.315

[0368] D. max ...

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Abstract

This invention discloses thermally developable compositions such as thermal and photothermographic emulsions which include certain quaternary phthalazine compounds. These emulsions are useful in thermally developable materials, such as thermosensitive materials and photothermographic materials, whereby improved sensitometric and postprocessing properties can be obtained. 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 phthalazine compounds. In particular, the present invention relates to thermosensitive and photothermosensitive materials containing phthalazine compounds. The invention also relates to methods of imaging thermally developable materials. Background technique [0002] Silver-containing thermosensitive 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 ca...

Claims

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Application Information

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IPC IPC(8): B41J2/32B41M5/323B41M5/337G03C1/498
CPCG03C1/49845Y10S430/168Y10S430/166Y10S430/167
Inventor W·D·拉姆斯登邹潮逢
Owner EASTMAN KODAK CO
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