A disperse dark dye

Abstract

The invention discloses a disperse dark-color dye. The disperse dark-color dye comprises the following components in parts by mass: 7-9 parts of a component A, 3-5 parts of a component B, 40-45 parts of a component C, 30-35 parts of a component D and 22-25 parts of a component E. The components are products which have less possibility of contaminating fibers and are applied in dyeing polyester and spandex blended fabrics, reduction washing is not needed on pure polyester, only one alkaline reduction washing is needed on the polyester and spandex blended fabrics to meet the fastness requirement, at least one cylinder of water can be saved, the wastewater discharge is reduced, the dyeing steps are shortened, the dyeing time is decreased, the production cost is reduced and high industrial application value is achieved. During application, the disperse dye composition has the characteristics of good dyeing deepness, good color fastness, excellent lifting power and the like and the dye application cost is well saved.

Description

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

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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