Active black dye

Abstract

The invention discloses a black active dye, which comprises the following parts: 15-90wt% black KN-B, 5-35wt% compound gold, 3-25wt% compound red and 0-35wt% adjuvant. The invention is fit for dyeing the cellulose or protein fiber, which has good lifting power, level-dyeing property, dyeing repeatability and dye-uptake.

Description

1. Technical field [0001] The invention relates to a reactive black dye, more particularly to a reactive black dye suitable for dyeing cellulose or protein fibers. 2. Background technology [0002] At present, in the dyeing of cellulose fibers, dyeing black with common red, yellow, and blue reactive dyes is easy to produce poor color, and the washing fastness is not ideal. Now most of them use reactive red, yellow and blue dyeing black with dichloro-s-triazine and vinyl sulfone dual active groups, because of their affinity to fibers, coloring rate, color fixing rate, salt and alkali There are certain differences in sensitivity, influence on bath ratio and sensitivity to temperature. Therefore, the reproducibility of dyeing shade is poor, and the chances of repair are great, resulting in a substantial increase in dyeing costs for customers. And be applicable to the black dyestuff of cold pad batch at present, ubiquitous problems such as alkali resistance stability is not hig...

AI Technical Summary

Problems solved by technology

[0002] At present, in the dyeing of cellulose fibers, dyeing black with common red, yellow and blue reactive dyes is more likely to produce poor tank quality, and the washing fastness is not ideal.

Now most of them use reactive red, yellow and blue dyeing black with dichloro-s-triazine and vinyl sulfone dual active groups, because of their affinity to fibers, coloring rate, color fixing rate, salt and alkali There are certain differences in sensitivity, influence on bath ratio and sensitivity to temperature. Therefore, the color reproducibility of dyeing is poor, and the chance of repair is large, resulting in a substantial increase in customer dyeing costs.

At present, the black dyes suitable for cold pad batch generally have problems such as low alkali resistance stability, low color fixation rate and poor fastness.

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