Reactive black dye composition

Abstract

The invention provides a reactive black dye composition, comprising 95-45 parts by weight of a component A, 0-40 parts by weight of a component B, 1-40 parts by weight of a component C, and 0-40 parts by weight of a component D. The component A is one or more selected from the compounds (Ia)-(Ib); the component B is one or more selected from the compounds (IIa)-(IIb), the component C is one or more selected from of (IIIa)-(IIIe), and the component D is one or more selected from formula (IV). The reactive black dye composition provided by the invention can be used for textile printing and dyeing, has advantages of good promotion performance, high color fixing rate, high dye uptake, easiness for washing, clear dyeing raffinate, stable alkaline and salt tolerance, and excellent wet-processing fastness, and is a rare economical black dye.

Description

(1) Technical field [0001] The invention relates to a reactive black dye composition, in particular to a reactive black dye composition with good deep dyeing property, good dye migration property, easy water washing and stable dyeing performance. (2) Background technology [0002] In cotton fiber dyeing, black accounts for almost 40-50%, and more direct dyes and sulfur dyes are banned and restricted due to environmental protection issues. Reactive black KN-B is used in a large amount because of its low price, good fastness, high color fixation rate and easy washing, and there is no environmental protection problem including AOX. But there are also defects such as poor lifting force and insufficient blackness, which limit its wide use. [0003] The existing reactive black dye color matching products still have problems such as poor dyeing depth, low dyeing rate and color fixation rate, and difficult cleaning of dyed fabrics in the actual application process, such as patents ...

AI Technical Summary

Problems solved by technology

But at the same time, there are also defects such as poor lifting force and insufficient blackness, which limit its wide use.

[0003] The existing reactive black dye color matching products still have problems such as poor dyeing depth, low dyeing rate and color fixation rate, and difficult cleaning of dyed fabrics in the actual application process, such as patents CN102245712A, CN1730566A, etc.

This is due to the high concentration of dyes used in deep-color dyeing, the amount of floating dyes increases, and the adsorption of dyes to fibers has a saturation value. Generally, the concentration of dyes should not exceed 10% of the saturation value of dyeing. Excessive dyes cannot be dyed and fixed. It will accumulate on the surface of the fabric. If the cleanability is not good, it will inevitably affect the wet fastness of the dyed fabric, resulting in poor dyeing performance.

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