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Preparation method of silver behenate and direct thermal imaging recording material prepared through silver behenate

A technology of silver behenate and recording material, applied in photosensitive materials, photothermographic systems, optics, etc., can solve the problem of high use cost, and achieve the effects of safe use environment, cost reduction, and harm reduction

Inactive Publication Date: 2017-01-04
CHINA LUCKY FILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As precursor chemicals, ketones are strictly controlled in the procurement and use process, and the cost of use is relatively high

Method used

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  • Preparation method of silver behenate and direct thermal imaging recording material prepared through silver behenate
  • Preparation method of silver behenate and direct thermal imaging recording material prepared through silver behenate
  • Preparation method of silver behenate and direct thermal imaging recording material prepared through silver behenate

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preparation example Construction

[0037] A preparation method for silver behenate, comprising the following steps:

[0038] (1) Add behenic acid, water and alcohol into the reactor, heat and dissolve until transparent, then add sodium hydroxide, completely dissolve until transparent, and obtain solution A;

[0039] (2) Silver nitrate is added to A and emulsified to obtain a silver behenate suspension B;

[0040] (3) the silver behenate suspension B is washed with water until the conductivity of the silver behenate suspension is less than 20 us / m to obtain a silver behenate wet cake;

[0041] (4) Drying the washed silver behenate wet cake until the weight does not change any more to obtain silver behenate powder.

[0042] The method for preparing a direct thermal imaging recording material using the above-mentioned silver behenate comprises the following steps:

[0043] (1) Silver behenate pre-dispersion: Dissolve PVB in ethyl acetate, add silver behenate dry powder, and stir at room temperature for pre-dispe...

Embodiment 1

[0102] (1) Preparation of silver behenate: 115.2g of behenic acid, 2000g of water and 880g of n-amyl alcohol are added to the reactor, heated to 75°C until completely dissolved to a transparent state, and then 345.6g of sodium hydroxide solution ( Concentration 5%), dissolve completely to transparent state, obtain solution A; 69.12g silver nitrate is added in A and carry out emulsification, obtain silver behenate suspension B;

[0103] (2) Washing and drying of silver behenate: wash the obtained silver behenate suspension with deionized water until the conductivity is 5us / m; dry at 60°C until the weight does not change; obtain silver behenate powder X1 .

Embodiment 2

[0105] (1) Preparation of silver behenate: 157.3g of behenic acid, 2000g of water and 360g of isoamyl alcohol were added to the reactor, heated to 75°C until all dissolved to a transparent state, and then 314.6g of sodium hydroxide solution was added ( Concentration 5%), dissolve completely to transparent state, obtain solution A2; 70.8g silver nitrate is added in A2 and carry out emulsification, obtain silver behenate suspension B2;

[0106] (2) Washing and drying of silver behenate: wash the obtained silver behenate suspension B2 with deionized water until the conductivity is 1us / m; dry at 60°C until the weight does not change; obtain silver behenate powder X2 .

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Abstract

The invention discloses a preparation method of silver behenate and a direct thermal imaging recording material prepared through the silver behenate. The silver behenate is applied to the imaging technology and is prepared through the following steps that behenic acid, water and alcohol are added into a reactor, the mixture is heated to be dissolved into a transparent state, sodium hydroxide is added, the mixture is completely dissolved into a transparent state, and a sodium behenate solution is obtained; silver nitrate is added into the sodium behenate solution, emulsification, washing and drying treatment are carried out, and silver behenate powder is obtained. No ketone solvent is used, the blasting risk of ketone steam in the preparation process is avoided, production stability and safety are obviously improved, meanwhile, anti-explosion treatment is not needed in a production workshop, cost is lowered, and the preparation method is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of imaging materials, in particular to a method for preparing silver behenate and a direct thermal imaging recording material prepared by using silver behenate. Background technique [0002] Thermal imaging materials based on long-chain silver carboxylate are divided into two technologies: photosensitive thermal imaging and direct thermal imaging, both of which have a history of more than 40 years of development. With the development of dry processing of medical images, these two technologies are It has been widely used in the field of medical imaging and has become two mainstream products in parallel in the market. The imaging principle of these two products is the thermal reduction of organic silver. The difference is that the photothermal technology is organic silver in silver halide. Thermal reduction occurs under the catalysis of the photosensitive center, and the key factor affecting image contrast is ...

Claims

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Application Information

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IPC IPC(8): G03C1/498
CPCG03C1/49809
Inventor 桑大力刘敏李万迎
Owner CHINA LUCKY FILM CORP
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