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Water-containing hot bleachable composition for optical thermosensitive imaging material

A composition and photothermographic technology, applied in photothermographic systems, photosensitive materials, optics, etc.

Inactive Publication Date: 2002-07-10
EASTMAN KODAK CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dark storage of thermally bleachable dye compositions is a challenge in the case of photothermographic systems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0118] Example 1 The following materials were prepared for the subsequent coating. Solid particle dye SPD1:

[0119] A dispersion of water-insoluble dye D-1 was prepared by ball milling. Add 0.25g of dye D-1, 0.15g of polyvinylpyrrolidone, 9.6g of distilled water and 10ml of zirconia microbeads to form a sample with a total amount of 10g. The slurry was ball milled for 48 hr. After ball milling, the zirconia beads were removed by filtration. Slurries were frozen prior to use. The D-1 structure is as follows: Solid particle bleach precursor SPBP1:

[0120] A dispersion of water insoluble bleach precursor H-1 was prepared by ball milling. Add 0.50g of HABIH-1, 0.15g of polyvinylpyrrolidone, 9.35g of distilled water and 10ml of zirconia microbeads to prepare a sample with a total amount of 10g. The slurry was ball milled for 48 hr. After ball milling, the zirconia beads were removed by filtration. The slurry was refrigerated until use. Water-so...

Embodiment 2

[0129] Example 2 The following materials were prepared for subsequent coating. Oily bleach precursor dispersion OBP1:

[0130] An oily dispersion of bleach precursor H-2 was prepared. 0.45 g of HABI compound H-2 was dissolved in 0.90 g of dibutyl 1,2-benzenedicarboxylate. The aqueous phase was made by dissolving 0.60 g of polyvinyl alcohol into 1.5 g of 10% Alkanol XC solution and 11.55 g of distilled water. The phases of the two components are then mixed together at high shear rates in a colloid mill. Solid particle dye SPD2:

[0131] A dispersion of water-insoluble dye D-3 was prepared by ball milling. Add 0.40g of dye D-3, 0.20g of polyvinylpyrrolidone, 19.4g of distilled water and 20ml of zirconia microbeads to prepare a sample with a total amount of 20g. The slurry was ball milled for 48 hr. After ball milling, the zirconia beads were removed by filtration. The slurry was refrigerated until use. Solid particle dye SPD3:

[0132] A dispers...

Embodiment 3

[0142] Prepare the following materials for subsequent coats. Solid particle dye SPD4:

[0143] A dispersion of water-insoluble dye D-3 was prepared by ball milling. Add 0.50g of dye D-3, 0.15g of polyvinylpyrrolidone, 19.35g of distilled water and 20ml of zirconia microbeads to prepare a sample with a total amount of 20g. The slurry was ball milled for 48 hr. After ball milling, the zirconia beads were removed by filtration. The slurry was refrigerated until use. Solid particle dye SPD5:

[0144] A dispersion of water-insoluble dye D-4 was prepared by ball milling. Add 0.50g of dye D-4, 0.15g of polyvinylpyrrolidone, 19.35g of distilled water and 20ml of zirconia microbeads to prepare a sample with a total amount of 20g. The slurry was ball milled for 48 hr. After ball milling, the zirconia beads were removed by filtration. The slurry was refrigerated until use. Solid particle dye SPD6:

[0145] A dispersion of water-insoluble dye D-1 was prepared by ball milling. A...

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Abstract

This invention relates to a photothermographic element comprising a support, at least one photothermographic image-receiving layer, and at least one antihalation layer or a filter layer, wherein the antihalation or filer layer comprises an aqueous heat-bleachable composition comprising at least one dye and at least one hexaarylbiimidazole in the form of particles dispersed in a matrix comprising a hydrophilic or aqueous dispersible polymer.

Description

field of invention [0001] This invention relates to colored aqueous heat-bleachable compositions whose electromagnetic absorption properties can be altered by heating. These compositions are used as antihalation or filter components of photothermographic materials. Background of the invention [0002] Photographic elements generally contain various layers and components, including antihalation or filter layers, protective layers, and radiation sensitive layers. The antihalation layer of the imaging material serves to block light that has passed through the radiation sensitive layer(s) and is reflected back into the radiation sensitive layer. If reflections are not prevented, the resulting image will not be sharp enough. In wet processing, the antihalation layer is generally removed or rendered colorless in wet chemical processing. The filter layer is used to absorb the color light that is not completely absorbed by the color layer or color layer u...

Claims

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Application Information

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IPC IPC(8): G03C7/04C09B67/46G03C1/04G03C1/06G03C1/498G03C1/825G03C1/83G03C7/407G03C8/40
CPCG03C1/04G03C8/4013G03C1/49854G03C1/83C09B67/0084Y10S430/165G03C2200/43
Inventor M·E·欧文R·戈斯瓦米K·N·基尔明斯特
Owner EASTMAN KODAK CO
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