Preparation method of printing-preventing auxiliary agent for reactive dye printing prevention

Abstract

The invention discloses a preparation method of a printing-preventing auxiliary agent for reactive dye printing prevention. The preparation method comprises the following steps of enabling 5-15wt% ofnonionic surfactant solid to be dissolved by 15-35wt% of water to configure a uniform dispersion system, carrying out stirring by a mechanical stirrer at the rotating speed of 1,000-2,000r, and dropwise adding at least one of 50-80wt% of white oil, silicone oil and kerosene while stirring to prepare a water-blocking thickening agent; and uniformly dissolving 1-3wt% of printing-preventing acid agent in 15-20wt% of deionized water, and adding 45-60wt% of water-blocking thickening agent into the solution, and carrying out uniform stirring by a mechanical stirrer, and the adding 20-40wt% of anionic polyurethane PU 300C into the solution, and uniformly stirring to prepare the printing-preventing auxiliary agent with the viscosity of 26,000-54,000 mPa.s.

Description

technical field [0001] The invention relates to the technical field of chemical printing and dyeing, in particular to a preparation method of an anti-printing auxiliary agent for reactive dyes. Background technique [0002] At present, the anti-printing of reactive dyes can be accomplished through chemical anti-printing and physical anti-printing. In chemical anti-printing, one is to use acid release agents such as citric acid and tartaric acid to destroy the color-fixing conditions of reactive dyes to achieve anti-printing for all types of reactive dyes. However, the amount of acid release agent used for anti-whitening is small, the anti-whitening effect is poor, and the dosage is high, which will cause serious damage to cotton fibers. The second is to use sodium sulfite for anti-printing for reactive dyes with vinyl sulfone active groups. Sodium sulfite can react with vinyl sulfone active groups first, so that it can no longer be combined with fibers to achieve the anti-wh...

AI Technical Summary

Problems solved by technology

[0002] At present, the anti-printing of reactive dyes can be completed by chemical anti-printing and physical anti-printing. In chemical anti-printing, one is to use acid release agents such as citric acid and tartaric acid to destroy the color-fixing conditions of reactive dyes to achieve anti-printing for all types of reactive dyes. Printing, but the amount of acid release agent used to prevent whitening has the disadvantages of small amount of acid release agent, poor anti-whitening effect, high dosage, and serious damage to cotton fibers

The second is to use sodium sulfite for anti-printing for reactive dyes with vinyl sulfone active groups. Sodium sulfite can react with vinyl sulfone active groups first, so that it can no longer be combined with fibers to achieve the anti-whitening effect of reactive dyes, but sodium sulfite anti-printing Whiteness is only suitable for anti-whitening of reactive dyes with vinyl sulfone active groups. The anti-printing process is easy to release harmful reducing gases such as sulfur dioxide.

Physical anti-printing mainly uses overprinting white made of titanium dioxide plus adhesive to cover the reactive dye to achieve anti-whitening. In this method, the adhesive is easy to stick to the floating color of the reactive dye, and the anti-whitening effect is poor.

Chinese patent CN105862463A discloses an anti-print printing process of reactive dyes. The anti-white paste of this patent includes at least one anti-print acid agent in 2-10wt% tartaric acid, maleic acid, itaconic acid, and ammonium sulfate for chemical acid anti-printing. White, 0-5wt% water glass is used as adhesive physical barrier, 5-10wt% hydroxyethyl saponin gum, guar carob gum, starch, and at least one of tamarind gum is used as anti-printing paste, wherein in this invention The anti-printing process is only for the anti-printing of reactive turquoise blue dye, and water glass is an alkaline substance, which is difficult to exist stably at pH 2-4

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