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Low-alkali reactive dye and its dyeing method

A technology for reactive dyes and dyeing methods, applied in the field of low-alkali reactive dyes and their dyeing, can solve the problems of not meeting ecological requirements and environmental protection requirements, consuming a lot of human and material resources, consuming soda ash and dyes, etc., and achieving excellent compatibility. and dyeing stability, ensuring dyeing reproducibility, and reducing dyeing costs

Active Publication Date: 2013-10-23
FOSHAN CITY YUFENG DYESTUFF
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  • Abstract
  • Description
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Problems solved by technology

[0005] 2), dyes are easily hydrolyzed in a high alkali environment, resulting in a lot of waste of dyes
[0007] To sum up, the existing dyeing dyes and their traditional dyeing methods not only consume a lot of soda ash and dyes, but also have a relatively long production time, consume a lot of manpower and material resources, and are not ecological. Requirements and Environmental Requirements

Method used

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  • Low-alkali reactive dye and its dyeing method
  • Low-alkali reactive dye and its dyeing method
  • Low-alkali reactive dye and its dyeing method

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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, where the schematic embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0031] Such as figure 1 As shown, the present embodiment discloses the general technical process of the present invention, and the method comprises:

[0032] (1) the step of adding low-alkali reactive dyes, sodium sulfate, and soda ash to the dye vat successively under normal temperature conditions; the concentration of soda ash added in the adding step is 1 to 5 grams per liter;

[0033] Among them, 10-100 grams per liter of sodium sulfate, X% of low-alkali reactive dyes, the amount of X% of reactive dyes is directly proportional to the amount of sodium sulfate, and its proportional relationship is common sense in this industry, so it will not be done here Too much narrative.

[0034] ...

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Abstract

The invention relates to a dyeing technique, particularly discloses low-alkali reactive dye and its dyeing method. By a lot of experiments, under the conditions of high temperature and low alkali, the low-alkali reactive dye is obtained in comprehensive consideration of compatibility, repeatability, diffusibility, level dyeing property and built-up property. The inventive low-alkali reactive dye and dyeing method can reduce consumption of sodium carbonate to about 1 / 10, shorten dyeing time by 1-3h, save energy and water and decrease wastewater discharge. In addition, the invention has simple operation.

Description

technical field [0001] The invention relates to a dyeing technology, in particular to a low-alkali reactive dye and a dyeing method thereof. Background technique [0002] The known dyeing conditions of the existing dyes are: at a medium temperature of 60°C, add soda ash (Na2CO3) with a concentration of 20 grams per liter (g / L) to make the pH value of the mixed solution reach 11 to 11.5, and through the catalysis of soda ash Function, make reactive dyes and cellulose fibers undergo nucleophilic addition reaction, and combine with fibers to achieve the purpose of dyeing. [0003] Among them, soda ash is an essential reaction condition, and its consumption directly affects the reaction and dyeing effect. Under the temperature condition of 60°C, when the amount of soda ash is reduced, the dye reaction is not complete and the color yield is low. If the amount of soda ash is dyed according to the normal dosage of 20 grams per liter (g / L), there are the following disadvantages: ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B67/22C09B67/24D06P1/38
Inventor 李建国
Owner FOSHAN CITY YUFENG DYESTUFF
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