Composite black active dye

Abstract

The present invention discloses a composite black active dye. The dye is prepared by mixing three active dyes of A, B and C, wherein a mass percentage ratio of the dye A to the dye B to the dye C is 3-5:7-10:85-90. According to the present invention, a hyperchromic effect due to the combination of the three dyes is adopted to improve the color emissivity and the dyeing property of the commercial active dye, increase the dye uptake and the color fixing rate of the dye, and improve other application properties of the dye; the good level-dyeing property is realized; the uniformity of the color before and after pad dyeing is ensured; the dye is especially applicable for exhaust dyeing of cellulose fiber, protein fiber and polyamide fiber.

Description

technical field [0001] The invention relates to a composite black reactive dye used for exhaust dyeing, tie-dyeing-steaming, tie-dyeing-baking and tie-dyeing-jet dyeing of cellulose fibers, protein fibers and polyamide fibers. Background technique [0002] As a representative of the modern dye industry, reactive dyes have developed rapidly in the past 50 years. Black dye is the most widely used and most productive color in dyes. 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 coffee, khaki, and brown, and the color difference between before and after is relatively large. The dyeing properties of compound dyes are not very compatible, and the hydrophilicity and lipophilicity between them are very different, and the directness and water solub...

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 coffee, khaki, and brown, and the color difference between before and after is large

The dyeing properties of compound dyes are not very compatible, and the hydrophilicity and lipophilicity between them are very different, and the directness and water solubility of the fiber are quite different, especially when adding alkali to fix the color during the dyeing process, the orange component is easy to precipitate Precipitation, causing color spots, and the affinity for fibers is also quite different, which is easy to cause color flowers, resulting in a low rate of genuine products after dyeing

To some extent, the application of reactive dyes is limited

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