Environment protection type reactive dye color fixing liquid alkali

Abstract

The invention discloses an environmental protective reactive dye fixation liquid alkali which can replace dying powder fixation alkali of prior reactive dying. The fixation liquid alkali has the characteristics of little dosage, convenient operation and environmental protection, and can reduce production cost, reduce environmental pollution and fulfill the requirement of automation batching. The formula of the reactive dye fixation liquid alkali of the invention according to weight percentage consists of: alkali metal hydroxide NaOH 5-12.5 percent; KOH 5-12.5 percent; alkali carbonate Na2CO3 7.5-15 percent; K2CO37.5-15 percent; stabilizer 4.9-5.1 percent; chelating agent 0.09-0.11 percent; and the rest is water.

Description

technical field [0001] The invention relates to the technical field of reactive dyes, in particular to an environment-friendly color-fixing liquid alkali for reactive dyes. Background technique [0002] Since the advent of reactive dyes in 1956, they have become the main dyes for cotton, regenerated cellulose fibers and their blended fabrics due to their advantages of convenient use, complete chromatogram, bright color, excellent fastness and uniformity, and through dyeing. [0003] The dyeing process of reactive dyes consists of two stages: dyeing and color fixation. The dyeing stage needs to add neutral salt (sodium sulfate or sodium chloride) to promote dyeing. Under the action of salt, the dye is only adsorbed on the fiber and does not Fixation, so the fastness is not good, it needs to be fixed under alkaline conditions. Reactive dyes are composed of chromogenic groups and active groups. The mechanism of color fixation is that the active groups of the dyes react with th...

AI Technical Summary

Problems solved by technology

[0005] In addition, there may be metal ions brought in from the dyeing water, the fabric itself and other channels in the reactive dye bath, such as calcium ions, magnesium ions, iron ions, copper ions, etc. The existence of these ions may complex with the dye, Causes a reduction in the solubility of the dye, or interferes with the dyeing of reactive dyes by catalyzing or causing hydrolysis of the dye, resulting in a reduction in the color yield of the fabric

[0006] In the published CN1687519 patent, phosphate and silicate of alkali metals are used. Although the two have good buffer properties, the use of phosphate will cause environmental pollution, and the use of silicate will interfere with the dye bath. Metal ions in the form of precipitates deposited on the equipment and may cause dyeing defects on the fabric

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