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Method for improving sunshine fastness of mulberry red pigment dyeing

A technology of red pigment and mulberry, which is applied in the field of textile dyeing and finishing, can solve the problems of unsatisfactory application effects, etc., and achieve the effects of improving stability, enriching varieties, and expanding application fields

Inactive Publication Date: 2009-10-14
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above methods can improve the light fastness of dyes to a certain extent, the actual application effect is not very ideal. It has certain applications in improving the light fastness of fabrics dyed with reactive dyes and other synthetic dyes. There are not many applications on fabrics

Method used

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  • Method for improving sunshine fastness of mulberry red pigment dyeing

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The acylating agent of the mulberry red pigment modification treatment method adopted in this embodiment is hexanoyl chloride.

[0018] Acylation treatment method: mulberry red pigment is dissolved in a reaction vessel with 30 times the amount of ethyl acetate, protected by N2, and a certain amount of acid chloride is slowly added under stirring to carry out acylation reaction. The molar ratio of mulberry pigment to acid chloride is 1:2.5, the reaction time is 5h, and the reaction temperature is 70°C. The product was rotovaped to remove ethyl acetate. The modified mulberry red pigment was obtained by hydrolysis, ether extraction, and low-temperature concentration and drying.

[0019] After the modification, the mulberry red pigment adopts the following method to dye the cotton fabric: the fabric is first treated with pre-media, the conditions are: mordant water and aluminum sulfate consumption 8% (weight to fabric), mordant dyeing temperature 90 ℃, time 45min, bath Ra...

Embodiment 2

[0021] The acylating agent of the mulberry red pigment modification treatment method adopted in this embodiment is maleic anhydride.

[0022] Acylation treatment method: mulberry red pigment is dissolved in a reaction vessel with 35 times the amount of ethyl acetate, a certain amount of maleic anhydride and catalyst p-toluenesulfonic acid are added, and the reaction is refluxed under stirring. The molar ratio of red pigment and acid anhydride is 1:3, and the reaction time is 15h. After the reaction, filter while hot, wash the filtrate with 0.1% NaOH to the pH of the aqueous phase to 6, then wash with pure water until the pH is about 7, remove the solvent by rotary evaporation, concentrate and dry at low temperature to obtain the modified mulberry red pigment.

[0023] After the modification, the mulberry red pigment adopts the following method to dye the real silk fabric: the fabric is first treated with pre-media, and the conditions are: the amount of mordant ferrous sulfate ...

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Abstract

The invention discloses a method for modifying the natural dye mulberry red pigment, which is characterized in that: the natural dye mulberry red pigment is modified by an acylating agent, and the modified mulberry red pigment is used for dyeing textiles, and the obtained The light fastness of the textiles is higher than that of the non-modified mulberry red dyed textiles. The acylating agent used for the modification may be an acid anhydride or an acid chloride which can undergo an acylation reaction with the morin pigment. The method can improve the stability of the mulberry red pigment to light, effectively improve the light fastness of the mulberry red pigment dyed fabric, make the dyed fabric fastness meet the requirements of textiles, expand the application field of the mulberry red pigment, and enrich the textiles Variety with natural dyes.

Description

technical field [0001] The invention relates to a method for modifying natural dye mulberry red pigment to improve the light fastness of dyeing, belonging to the technical field of textile dyeing and finishing. Background technique [0002] At present, some synthetic dyes are banned due to toxicity and pollution problems, while natural dyes have the characteristics of good compatibility with the ecological environment, biodegradability, low toxicity, and the raw materials for the production of these dyes can be recycled, so more and more The more people pay attention, natural dyes have been widely used in food industry, daily chemicals, textile dyeing and other fields. The natural dye mulberry red pigment is a colored substance extracted from the fruit mulberry of the natural plant mulberry tree. It is a safe and non-toxic food coloring and is widely used as an additive in the food industry. Before the present invention was made, it was entitled "Application Research of Mul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B61/00D06P1/34
Inventor 王祥荣徒晓茜丁雷侯学妮吴丹续通
Owner SUZHOU UNIV