Novel substitutive alkali and preparation method thereof

Abstract

Disclosed is novel substitutive alkali. The novel substitutive alkali is prepared from, by weight, 73-82% of organic alkali and potassium carbonate, 10-15% of buffer agent and 8-12% of additive. The novel substitutive alkali has the advantages that wet rubbing fastness values of the novel substitutive alkali and sodium carbonate are close, the wet rubbing fastness values are up to Grade IV when the novel substitutive alkali is used for cotton fabrics dyed by reactive dark blue SGE and reactive blue SPR dyes and fixed, and the novel substitutive alkali is up to or superior to fixation performance of highly-condensed dyeing substitutive alkali and the sodium carbonate.

Description

technical field [0001] The invention belongs to the technical field of printing and dyeing auxiliaries, and in particular relates to a novel substitute alkali and a preparation method thereof. Background technique [0002] Reactive dyes are water-soluble dyes containing reactive groups. They are currently the most important type of dyes used for dyeing cellulose fibers. They can be covalently cross-linked with hydroxyl groups on cellulose molecules under alkaline conditions to achieve color fixation. the goal of. The color-fixing alkali agents used in the traditional dyeing process of reactive dyes are mainly some inorganic substances, and the common ones are carbonates, phosphates, silicates, etc. In practice, it is found that the use of soda ash has the characteristics of good reproducibility of dyed fabrics and stable pH value of dyeing liquor. However, during the use of soda ash, there are defects such as easy generation of dust, poor water solubility, and easy agglome...

AI Technical Summary

Problems solved by technology

However, there are still some problems in the use of the existing substitute alkalis, such as the unsteady dyeing rate of some dyes, and the deviation of the shade of the dyed fabric from the shade of the fabric fixed with soda ash.

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