High-fastness disperse dark blue dye

Abstract

The invention discloses high-fastness disperse dark blue dye. The high-fastness disperse dark blue dye comprises, by mass, 8-9 parts of an ingredient A, 3-4 parts of an ingredient B, 20-25 parts of an ingredient C, 30-31 parts of an ingredient D, 16-18 parts of an ingredient E and 5-8 parts of an ingredient F. The high-fastness disperse dark blue dye comprises the ingredients having low fiber staining effects, can be used for dyeing terylene and spandex blended fabrics, is free of reduction washing in pure terylene dyeing, realizes standard color fastness of the terylene and spandex blended fabrics only by one alkaline reduction washing process, at least reduces a cylinder of water, reduces waste water discharge and realizes environmental protection.

Description

technical field [0001] The invention relates to the field of preparation of disperse dye compositions, in particular to a high-fastness disperse dark blue dye suitable for dyeing polyester and spandex blended fabrics. Background technique [0002] In recent years, various countries and regions have successively promulgated various laws and regulations on environmental protection. my country has also determined the basic national policy of saving resources and protecting the environment, and put forward higher requirements for the dyeing and finishing industry that consumes a lot of energy and discharges a lot of pollutants. The application of traditional high fastness disperse dyes to pure polyester dyeing must go through at least one reduction washing, and the application of polyester and spandex blended fabrics requires at least two reduction washings to meet the fastness requirements. [0003] The common disperse dark blue currently on the market mainly includes disperse d...

AI Technical Summary

Problems solved by technology

[0003] The common disperse dark blue currently on the market mainly includes disperse dark blue 79, disperse dark blue 291, etc. Due to the stable structure of these conventional dyes, it is not easy to clean, resulting in poor color fastness, which must rely on repeated reduction washing to improve the fastness. (There are two methods of reduction washing: ①alkaline washing: adding sodium hydrosulfite and caustic soda; ②acid washing: adding acidic reducing detergent and acetic acid). To achieve better fastness, at least one reduction washing is required for polyester; The fabric needs at least two reduction washings, which prolongs the dyeing time, increases the cost, and increases the discharge of dyeing wastewater

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