Preparation method and application of a dendritic polyamine cationic modifier with multiple active centers

Abstract

The invention discloses a preparation method of a multi-active center dendritic polyamine cationic modifier: (1) using trichloro-s-triazine and dendritic polyamine compounds to react under acidic conditions to generate dichloro-s-triazine (2) adding epichlorohydrin to the dichloro-s-triazine dendritic polyamine derivative, and heating and reacting to generate a multi-active center dendritic polyamine cationic modifier. The dendritic polyamine cationic modifier prepared by the invention is used for the modification of cotton fabrics, realizes the efficient cationization of cotton fibers, significantly improves the dyeing rate and fastness of reactive dyes, and realizes the salt-free, salt-free, high-efficiency effects of reactive dyes on cotton fibers. Low-alkali, efficient and environmentally friendly dyeing.

Description

technical field

[0001] The invention belongs to the technical field of textile printing and dyeing, in particular to a preparation method and application of a dendritic polyamine cationic modifier with multiple active centers. Background technique

[0002] As we all know, reactive dyes have become the main dyes for cotton fiber dyeing because of their advantages such as simple structure, complete color spectrum, low cost and high fastness. During the dyeing process, the cotton fiber is negatively charged and has weak adsorption to anionic reactive dye molecules, resulting in low dye uptake and fixation rates. Therefore, a large amount of inorganic salts need to be added to the traditional dyeing process to promote dyeing. Improve the dye uptake rate and color fixation rate. The dosage of salt is generally 30-200g / L. The discharge of a large amount of inorganic salts in printing and dyeing wastewater has caused serious environmental pollution. On the other hand, since the ...

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