A kind of reactive dye fixing agent and preparation method thereof

Abstract

The invention discloses a reactive dye color fixing agent and a preparation method thereof. The color fixing agent is prepared from the following raw materials in parts by weight: 41-49 parts of bisphenol S, 5-13 parts of propylene dichloride, 10-18 parts of dimethyl formamide, 17-25 parts of dimethyl sulfoxide, 3-7 parts of fatty alcohol-polyoxyethylene ether and 13-21 parts of dichloroacetic acid. The preparation method comprises the steps of mixing the bisphenol S with the dimethyl sulfoxide and the dimethyl formamide, heating and stirring an obtained mixture; then, adding a fatty alcohol-polyoxyethylene ether solution, heating and stirring; after that, adding the propylene dichloride, heating and stirring; dropwise adding a dichloroacetic acid solution, heating and stirring, and cooling to the room temperature to obtain the reactive dye color fixing agent. The color fixing agent prepared by the method has the advantages of being high in dyeing fastness, capable of obviously improving dry-wet rubbing fastness and color fastness to washing, and the like under the interaction of all the raw materials, and enables reactive dyes basically not to have color change when being used for carrying out color fixation on the reactive dyes; furthermore, the reactive dye color fixing agent is formaldehyde-free, environment-friendly, free from secondary pollution, simple in production technology, suitable for industrial production and especially suitable for the field of color fixation of the reactive dyes.

Description

technical field [0001] The invention relates to the technical field of dye auxiliaries, in particular to a reactive dye fixing agent and a preparation method thereof. Background technique [0002] At present, there are many reasons why the fastness of dyed fabrics cannot meet the requirements. When dyeing with direct dyes, the dyes only rely on van der Waals force, hydrogen bonds and fibers, and the binding force between dyes and fibers is small, and there are sulfur in their molecular structure. Hydrophilic groups such as acid groups and carboxyl groups, when washing, the dyes are easily soluble in water and detached from the fibers, resulting in poor fastness to wet treatment. The reactive group in the reactive dye molecule is easy to bond with the fiber by covalent bond. Theoretically speaking, the covalent bond formed by reactive dyes and fibers is quite strong, and there is no problem of color fastness. In essence, during the dyeing process, especially when dyeing thi...

AI Technical Summary

Problems solved by technology

However, it is easy to change the hue when fixing the sensitive color reactive dyes such as emerald blue and brilliant blue.