Oxidation-resistant disperse dye composition and preparation and application thereof

Abstract

The invention relates to an oxidation-resistant disperse dye composition and preparation and an application thereof. The oxidation-resistant disperse dye composition comprises the combination of any 2-4 of a yellow dye shown as a general formula (I), an orange dye shown as a general formula (II), a blue dye shown as a general formula (III) and a red dye shown as a general formula (IV), not more than two types of dyes are shown as each general formula; and the oxidation-resistant disperse dye composition is applied to pre-treatment dyeing of dacron or polyester-cotton blended fabrics. The disperse dye composition can be used for dyeing polyesters and blended fabrics thereof under the strong oxidative condition that the mass concentration of H2O2 is 0.1-0.5 percent, and an obtained fabric has the advantages of stable chromatic light, bright color, neat cloth cover and excellent fabric style; and according to the disperse dye composition, pretreatment and one-bath and one-step dyeing of polyester fiber or blended fabrics thereof are realized, efficiency is increased, production cost is reduced, and dyeing waste water is reduced.

Description

technical field [0001] The invention belongs to the field of disperse dyes and their preparation and application, in particular to an oxidation-resistant disperse dye composition and its preparation and application. Background technique [0002] In the past ten years, the problems of energy shortage and environmental pollution have become increasingly prominent. At the same time, the competition in the international textile market has become more intense, requiring high processing efficiency and low processing costs. This has further promoted the research and development of the one-bath one-step process for pre-treatment dyeing in various countries around the world. , and there is a certain expansion in the fabrics, dyes, processes and even auxiliaries used, which fully shows that pretreatment and one-bath short process of dyeing are one of the development trends of modern fabric dyeing and finishing processing, energy saving and emission reduction. However, traditional disp...

AI Technical Summary

Problems solved by technology

However, traditional disperse dyes and their compositions cannot exist in the same bath with peroxide, and shade changes occur in the peroxide system. Most disperse dyes are not resistant to peroxide oxidation and cannot be dyed.

[0003] For a long time, polyester fiber fabrics such as polyester, including polyester woven fabrics, polyester knitted fabrics, polyester cheese yarns, etc., need to be desized, degreased, drained, rinsed under strong oxidative conditions before dyeing, and then neutralized. , and then dyed with disperse dyes under weak acidic conditions, the dyeing process is long, and a large amount of wastewater is discharged during washing and neutralization, which seriously pollutes the environment and reduces production efficiency

[0004] Because conventional disperse dyes are not resistant to strong oxidation, some disperse dyes have certain stability in the presence of a small amount of hydrogen peroxide, but usually the concentration of hydrogen peroxide is high during pretreatment, and the dyes in such an environment are severely decomposed and cannot be used for normal dyeing.

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