Black dye composition

Abstract

The invention relates to a black dye composition, which comprises reactive black 5 and reactive orange 142, wherein the weight ratio of the reactive black 5 to the reactive orange 142 is 5-95:95-5. The reactive dye composition has good water solubility and can reach 200g / L at 25 DEG C; the dye solution is uniform; and a problem of tailing of ending in the printing process is solved. The dye solution can be fully utilized so as to reduce waste liquor, dye solution treatment cost and environmental pollution.

Description

technical field [0001] The invention belongs to the field of dye compositions, in particular to a black dye composition. Background technique [0002] Reactive Black 5, CAS registration number 12225-25-1, black powder, blue-green in concentrated sulfuric acid, turning blue-gray after dilution; brown in concentrated nitric acid, turning light brown after dilution. Water solubility (25°C)>200g / L, its aqueous solution is blue light black. The dye is used for dyeing and printing cotton, linen viscose, silk and nylon. In addition to being used alone, it can be combined with reactive purple and reactive blue to dye dark blue, and reactive brilliant red M-8B can be combined to dye deep navy blue. Reactive black KN-B has a blue-black color and can be used instead of aniline black for dyeing and printing. The process is simple and the color is similar. The dyed fabric of this product is treated with 2D resin, and the shade is basically unchanged. The cotton cloth is treated wit...

AI Technical Summary

Problems solved by technology

[0004] Most of the reactive dyes suitable for pad printing are relatively direct, and it is easy to cause color difference between the beginning and the end during the printing process.

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