Reactive dye substituted by benzene-containing sulfonamide and derivative of benzene-containing sulfonamide, and preparation method of reactive dye

Abstract

The invention relates to the field of reactive dye, and particularly relates to a reactive dye substituted by benzene-containing sulfonamide and a derivative of the benzene-containing sulfonamide, anda preparation method of the reactive dye. The reactive dye substituted by the benzene sulfonamide and the derivative of the benzene sulfonamide has a structure represented by a general formula I. Inmolecules of the reactive dye, benzene sulfonamide and substituted benzene sulfonamide groups are directly connected with halogenated s-triazine molecules, and the electron-cloud density of carbon atoms on a triazine ring is reduced through an electron-absorbing effect, so that a nucleophilic substitution reaction occurs easily, therefore, reaction activity of the triazine structure is equivalentto reaction activity of aniline ethyl sulfonyl sulfate, the reaction rate of the dye at 60 DEG C is equivalent to the reaction rate at 90 DEG C, and energy-saving dyeing under mild conditions can be realized. In addition, the dye has high light fastness and has a wide application prospect.

Description

technical field

[0001] The invention relates to the field of reactive dyes, in particular to a reactive dye substituted with benzenesulfonamide and its derivatives and a preparation method thereof. Background technique

[0002] Reactive dyes can be covalently bonded to fibers and have high wet fastness. Now they have become the main category of dyes for cellulose fiber printing and dyeing. Due to the advantages of cheap and easy-to-obtain raw materials, simple synthesis, bright shade, and complete chromatogram, about 80% of dyes use azo-based chromophores, but because azo bonds are easily affected by ultraviolet light, Oxygen, etc., are prone to redox reactions, resulting in lower light fastness (Dyes and Pigments, 1988, 9(3): 233-241; Surface and Coatings Technology, 2014, 253: 185-193; Dyes and Pigments, 2003, 59(3):269-275). There are two main ways to improve the light stability of dyes: one is to use chromophores with higher light fastness, such as: anthraquinone, phth...

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