High-fastness black vat dye and preparation method thereof

Abstract

The invention discloses a high-fastness black vat dye and a preparation method thereof. The dye is composed of the following components in percentage by mass: 7-10% of dye monomer A, 3-5% of dye monomer B, 7-10% of dye monomer C, 17-20% of dye monomer D, 0.5-2% of dust preventive and the balance of dispersing agent. The dye has various favorable color fastnesses, and especially has excellent fastness to chlorine bleaching, solarization and washing; the fastness to chlorine bleaching is up to Grade 4-5, and the fastness to washing is Grade 4-5; and the dye has the advantages of simple preparation method and high dye uptake, and is suitable for dye printing of textiles with high-quality requirements.

Description

technical field [0001] The invention relates to the technical field of vat dyes, in particular to a high-fastness black vat dye and a preparation method thereof. Background technique [0002] Vat dyes are dyes with excellent performance in dyes. They have many varieties, relatively complete chromatograms, bright colors, good color fastness, good washing fastness and light fastness, and can be widely used in cotton. , wool, silk, linen, synthetic fibers and their blended fabrics, printing and dyeing of interwoven fabrics. At present, most of the commercially available black dyes are single-component. For example, vat dyes such as vat black RB, which are widely used, have low chlorine bleaching fastness, difficult dyeing operation for dark colors, and low light resistance and washing fastness. Can not satisfy the demand that people's high quality of life pursues. In addition, in its commercial manufacturing process, due to the improper selection of additives and their propor...

AI Technical Summary

Problems solved by technology

At present, most of the commercially available black dyes are single-component. For example, vat dyes such as vat black RB, which are widely used, have low chlorine bleaching fastness, difficult dyeing operation for dark colors, and low light resistance and washing fastness. Can not meet the needs of people's pursuit of high quality of life

In addition, in the commercial manufacturing process, due to the improper selection of additives and their proportions, problems such as low pad dyeing rate of the product, poor dispersion stability and diffusibility of the suspension will also occur.

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