Dark colored reactive dye with high fixation rate

Abstract

The invention relates to a dark colored reactive dye with high fixation rate, belonging to the technical field of chemical dyestuff. The dark colored reactive dye consists of dark blue, red and yellow reactive dyes. The dye is characterized by comprising dark blue, red and yellow components in structures shown in general formulae. The three-primary-color reactive dye comprises the following components in ratio by weight: dark blue: red: orange=(50-80):(6-25):(6-20). The dark colored reactive dye provided by the invention is applicable to dyeing natural fibers such as cotton, hemps and regenerated fibers and is also applicable to dyeing protein fibers and polyamide fibers. The textile fibers can be in various forms such as fibers, yarns, fabrics or knitted goods. Dip dyeing means that the dyed object is absorbed in a dye bath with an appointed formula and then is fixed by alkali treatment, wherein the dyeing and fixing temperature is 50-70 DEG C. The leveling property of the dye is better promoted, the three components are good in compatibility, the colored light in a dyeing process is relatively stable, and the dye has good pitch-black degree.

Description

technical field [0001] The invention relates to the technical field of chemical dyes, in particular to a reactive dye in the fine chemical industry. Background technique [0002] Black reactive dyes are the most widely used and produced varieties of dyes. Since the 21st century, a large number of reactive black patents have come out, but so far, the vast majority of commercial reactive dyes still use C.I. reactive black. Such as Cibacron Black WNN, Cibacron Supra Black G, Supra Black R, etc. The advantages of these dyes are not only the better blackness of the dyed fabrics, but also the dyeing curves of the three primary colors have the same trend, and the compatibility is better. Related patents include CN200510047135.4, CN200510047136.9, WO2004069937, US6537332, USP5849887 and so on. [0003] However, the main deficiency of the above-mentioned dyes is that the fixation rate of the dyes is only 60% to 65%, the chroma of the dyeing residue is high, and a large amount of ...

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Problems solved by technology

[0003] However, the main deficiency of the above-mentioned dyes is that the fixation rate of the dyes is only 60% to 65%, the chroma of the dyeing residual liquid is high, and a large amount of unfixed and hydrolyzed dyes remain in the dyeing waste liquid, which not only affects the economic benefits, but also causes environmental pollution

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