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Water-soluble anti-fading agent for color photographic paper and preparation method thereof

An anti-fading, water-soluble technology, applied in papermaking, paper coatings, textiles and papermaking, etc., can solve the problems of not using water-soluble color paper emulsion, easy to stick to the pot wall, difficult to clean, etc., to achieve a narrow range of molecular weight distribution, The degree of polymerization is easy to control and the synthesis process is simple

Active Publication Date: 2020-09-11
乐凯化学材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

inconvenient to use
[0048] (2) The above anti-fading agents are all oil-soluble, suitable for oil-soluble emulsions; generally not used in more environmentally friendly water-soluble colored paper emulsions
[0049] (3) When the above anti-fading agent is used in oil-soluble emulsion, it needs to add a suitable emulsifier, and it needs to be dispersed under high-speed stirring, which is inconvenient to use
[0050] (4) Add the above-mentioned anti-fading agent to the emulsion, and it is easy to form a layer of film on the surface of the emulsion. Adding this material is easy to stick to the pot wall when coating, it is not easy to clean, and it will block the filter element, affecting the operation and use

Method used

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  • Water-soluble anti-fading agent for color photographic paper and preparation method thereof
  • Water-soluble anti-fading agent for color photographic paper and preparation method thereof
  • Water-soluble anti-fading agent for color photographic paper and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] In a 250ml flask, 100.0ml of ethanol was added, and 6.0g of N-tert-butylacrylamide, 6.0g of butyl acrylate and 1.0g of acrylic acid were added with stirring. Heat the water bath to 65°C, add 0.7g of benzoyl peroxide, when the temperature is stable at 65°C--70°C, start to drop the mixed monomer solution (10.0g of N-tert-butylacrylamide, 10.0g of butyl acrylate and 1.5 g of acrylic acid dissolved in 35.0 ml of ethanol). The dropping time is 2 hours, and the temperature is stable at 65°C--70°C. Then keep warm for 6 hours.

[0085] After that, ethanol is distilled under reduced pressure, and the vacuum degree is maintained at 0.06-0.095Mpa. Evaporate; add 130.0ml of deionized water and 25% ammonia water to adjust PH=6.5--7, stir and dissolve, filter to obtain anti-fading agent, weighing 172.5g.

[0086] Product appearance: pale yellow transparent liquid; solid content 20%; fading rate of color photo paper is 9.5%.

Embodiment 2

[0088] In a 250ml flask, 85.0ml of ethanol was added, and 8.0g of N-tert-butylacrylamide, 4.0g of butyl acrylate and 4.0g of acrylic acid were added with stirring. Heat the water bath to 70°C, add 0.5g of benzoyl peroxide, when the temperature is stable at 70°C--75°C, start to drop the mixed monomer solution (8.0g N-tert-butylacrylamide, 4.0g butyl acrylate and 4.5 g of acrylic acid dissolved in 70.0 ml of ethanol). The dropping time is 2.5 hours, and the temperature is stable at 70°C--75°C. Afterwards, the reaction was incubated for 6.5 hours.

[0089] After that, ethanol is distilled under reduced pressure, and the vacuum degree is maintained at 0.06-0.095Mpa. Steamed; add 120ml of deionized water and 25% ammonia water to adjust the pH=7-7.5, stir and dissolve, filter to obtain the anti-fading agent, and weigh the total weight at 165g.

[0090] Product appearance: pale yellow transparent liquid; solid content 20%; fading rate of color photo paper 10.0%.

Embodiment 3

[0092] In a 250ml flask, 100.0ml of ethanol was added, and 6.0g of N-tert-butylacrylamide, 5.0g of ethyl acrylate and 1.0g of acrylic acid were added with stirring. Heat the water bath to 65°C, add 0.7g of benzoyl peroxide, when the temperature is stable at 65°C--70°C, start to drop the mixed monomer solution (10.0g of N-tert-butylacrylamide, 7.5g of butyl acrylate and 1.5 g of acrylic acid dissolved in 35.0 ml of ethanol). The dropping time is 2 hours, and the temperature is stable at 65°C--70°C. Then keep warm for 6 hours.

[0093] After that, ethanol is distilled under reduced pressure, and the vacuum degree is maintained at 0.06-0.095Mpa. Evaporate; add 120.0ml of deionized water and 25% ammonia water to adjust the pH=6.5-7, stir and dissolve, filter to obtain the anti-fading agent, and weigh the total weight at 155g.

[0094] Product appearance: pale yellow transparent liquid; solid content 20%; fading rate of color photo paper is 9.8%.

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Abstract

The invention discloses a preparation method for a water-soluble anti-fading agent for color photographic paper. The preparation method comprises the following steps: (1) adding a water-soluble solvent into a reaction container, adding certain amount of acrylamide, acrylic acid and acrylate while stirring, heating to 60-80 DEG C, and adding an initiator; (2) after the temperature is stable, starting to dropwise add a solution of a water-soluble solvent containing acrylamide, acrylic acid and acrylate, controlling the temperature at 65-75 DEG C and keeping for 2-8 hours, wherein dropwise addingtime is 1-4 hours; and (3) after reaction is completed, reducing pressure to distill the solvent, adding deionized water and inorganic alkaline after distillation is completed, stirring and dissolving, and regulating the pH value to be 6-9, and filtering to obtain a light yellow transparent liquid product. The synthesis process is simple in step, is suitable for water-soluble color paper emulsion, is good in compatibility with the emulsion, is free of pollution, and is safe and environmentally friendly. The photographic material is good in anti-fading effect. The post-treatment process is simple, is low in cost, and is suitable for industrial large-scale production.

Description

technical field [0001] The invention belongs to the field of macromolecules and photosensitive materials, in particular to a water-soluble anti-fading agent for color photographic paper. Background technique [0002] As we all know, color positive materials, such as color film positive film, color photo paper and other color images, undergo high temperature, sunlight, ultraviolet radiation, etc., the parts with color on the screen will fade, while the parts without color will appear brownish yellow, that is, Different fading and discoloration phenomena. Whether the color image fades, changes color and the speed of fading and changing color is an important indicator to measure the performance of color photo paper. There is no such thing as an image that is absolutely color-fast and does not change color. [0003] At present, the methods that have been adopted to prevent color fading mainly include: (1) using oil-soluble couplers, and introducing various functional groups su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/14D21H19/14D21H19/20C08F220/54C08F220/18C08F220/56C08F220/06
CPCC08F220/18C08F220/1804C08F220/54C08F220/56D21H19/14D21H19/20D21H21/14C08F220/06
Inventor 胡占宗
Owner 乐凯化学材料有限公司
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