Alkali-resistant disperse dye complex

Abstract

The invention discloses an alkali-resistant disperse dye complex, and relates to disperse blue BR-based alkali-resistant disperse dye complexes suitable for dyeing in a wide pH range. The complex comprises (1) alkali-resistant disperse dye blue complex, or (2) alkali-resistant disperse dye blue complex, or (3) alkali-resistant disperse dye black complex. The disperse dye complex of the invention has good dispersibility, dyeing stability and good reproducibility, and can effectively avoid the problems of stains, flaws, chromatic aberration and the like caused by dirt such as slurry, oil stain,wax and the like on fibers; and the pH value has wide range during use, dyeing can be performed in the pH range of 4.0 to 11.25, the dyed fabrics have full hue, and the dyed fabrics with predominant color fastness performance such as washing fatness, daylight fastness and the like can be obtained without reduction clearing.

Description

technical field [0001] The invention relates to a compound product of disperse dyes, in particular to a compound product of alkali-resistant disperse dyes based on disperse blue BR, which is suitable for dyeing in a wide pH range. Background technique [0002] Hydrophobic fibers often need to be refined under alkaline conditions before dyeing to remove stains such as pulp, oil stains, and waxes on the fibers, and then dyed under weakly acidic conditions. After dyeing, soaping and washing Restore cleaning. Incomplete and uneven refining in the alkaline bath before dyeing, or incomplete washing after refining, will easily cause uneven dyeing, stains, blemishes, and weak spots when dyeing in the subsequent weak acid bath. The pH range of the acidic dye bath changes greatly, causing the shade change of the dyed sample, and the reappearance of the dyeing is aberrant. Moreover, during the dyeing process in the acid bath, unwashed pulp, oil stains, waxes and other stains in the f...

AI Technical Summary

Problems solved by technology

Incomplete and uneven refining in the alkaline bath before dyeing, or incomplete washing after refining, will easily cause uneven dyeing, stains, blemishes, and weak spots when dyeing in the subsequent weak acid bath. The pH range of the acidic dyeing bath changes greatly, causing the shade change of the dyed sample, and the reappearance of the dyeing is aberrant.

Moreover, during the dyeing process in the acid bath, unwashed pulp, oil stains, waxes and other stains in the fibers will precipitate and contaminate the inner wall of the dyeing equipment, resulting in uneven dyeing, stains, and blemishes

[0003] In order to solve these problems, some studies have proposed adding additives in the dyeing bath to achieve dyeing and treatment in the same bath, but it has not been applied in practice due to poor dyeing reproducibility

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