Dark blue disperse dye

Abstract

The invention discloses a dark blue disperse dye, which consists of the following components in parts by mass: 7 to 9 parts of component A, 3 to 4.5 parts of component B, 40 to 43 parts of component C, 29 to 33 parts of component D and 14 to 20 parts of component E. According to the dark blue disperse dye, the components are products which can difficultly contaminate fibers, and when the dark blue disperse dye is applied to the dyeing of polyester and spandex blended fabrics, fastness requirements can be met without reduction washing on pure polyester and by only once alkali reduction washing on the polyester and spandex blended fabrics, so that at least one cylinder of water can be saved, wastewater discharge can be reduced, dyeing steps can be reduced, the dyeing time can be shortened, the production cost can be lowered, and the dark blue disperse dye has high industrial application value.

Description

technical field [0001] The invention relates to the field of preparation of disperse dye compositions, in particular to a 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 dark blue 79, 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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