Composite active medium-green dye

Abstract

The invention discloses a composite active medium-green dye. At present, the conventional dyes have poor stability and larger color difference before and after dyeing when being used for pad-dyeing army green, dark green and other sensitive colors. Particularly when a base is added during dyeing process for fixing, because of poor base resistance of the dyes, the dyeing defect is easily caused, thus resulting in low yield of primary dyed products. The composite active medium-green dye is formed by mixing 15-75wt% of active dye A, 10-65wt% of active dye B, 10-60wt% of active dye C and the balance of adjuvant, and has the advantages of high solubility and base resistance, good water washing fastness and compatibility, wide application performance and excellent properties. In the invention, three dyes are combined to improve the application and dyeing performance of the commercial active dye and to increase the water washing fastness, base resistance and compatibility of the dye, thus meeting user needs.

Description

technical field [0001] The invention relates to dyes, in particular to a composite reactive medium green dye for cellulose fibers. Background technique [0002] As a representative of the modern dye industry, reactive dyes have developed rapidly in the past 50 years. At present, the annual output of reactive dyes for cellulose fibers in the world is about 200,000 tons, accounting for about 20% of the world's annual output of dyes. In view of the fact that the current conventional dyes are not stable enough when pad dyeing sensitive colors such as army green and dark green, and the color difference between before and after is relatively large. The dyeing performance of the compound dyes is not very compatible, the hydrophilicity and lipophilicity of the dyes are very different, and the directness and water solubility of the fibers are quite different, especially when adding alkali to fix the color during the dyeing process, due to poor alkali resistance , It is easy to caus...

AI Technical Summary

Problems solved by technology

In view of the fact that the current conventional dyes are not stable enough when pad dyeing sensitive colors such as army green and dark green, and the color difference between before and after is large

The dyeing performance of the compound dyes is not very compatible, the hydrophilicity and lipophilicity of the dyes are very different, and the directness and water solubility of the fibers are quite different, especially when adding alkali to fix the color during the dyeing process, due to poor alkali resistance , it is easy to cause color flowers, resulting in a low rate of genuine products after dyeing

In addition, the solubility of its main components is limited due to its structure, so the corresponding color fastness, such as washing fastness, can generally only reach level 2-3.

Affected by the above factors, the scope of application and promotion of such products are limited to a certain extent.

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