Formaldehyde-free activated dye color fixing agent and preparation method thereof

Abstract

The invention provides a formaldehyde-free activated dye color fixing agent and a preparation method thereof. The preparation method comprises the following steps of 1, sequentially adding oleic acid imidazoline quaternary ammonium salt, trimethylolpropane monoallylether, 1-3-diallylurea, silicon-containing monomer, a chelating agent and deionized water into a reaction kettle provided with a thermometer, a stirrer and a reflux condenser, then starting reflux condensation, conducting stirring, and starting heating for raising the temperature; 2, when the temperature is raised to 85-100 DEG C, starting dropwise adding an initiator solution with the mass percentage concentration ranging from 1% to 10%, wherein the initiator solution is prepared from initiator and part of deionized water, the dropwise adding time is controlled to be 0.5-4 hours, and the temperature in the dropwise-adding process is controlled to be 85-100 DEG C; 3, after the initiator solution is added completely, conducting a reaction for 1-5 hours with the temperature preserved, subsequently adding the balance water, stirring the materials for 0.5 hour, and then discharging the materials, so that the color fixing agent is obtained.

Description

technical field [0001] The invention belongs to the field of fine chemicals, in particular to a formaldehyde-free reactive dye fixing agent and a preparation method thereof. Background technique [0002] Reactive dyes are low in price, complete in color spectrum and bright in color, and are widely used in cotton fabric dyeing. Although the reactive groups in the reactive dye molecules are easy to bond with the fibers through covalent bonds, the color fastness is not ideal. During the dyeing process, especially when dyeing dark colors, there will often be a large amount of unfixed reactive dyes on the dyed fabric due to the high concentration of the dye. These unfixed dyes are difficult to wash off from the dyed fabric. This part The dye will fade during the washing process; at the same time, the chemical bonds formed between some active groups and fibers are easily hydrolyzed, resulting in low wet fastness. The early color fixing agents such as color fixing agent Y are the...

AI Technical Summary

Problems solved by technology

Although the reactive group in the reactive dye molecule is easy to bond with the fiber by covalent bond, the color fastness is not ideal

During the dyeing process, especially when dyeing dark colors, there will often be a large amount of unfixed reactive dyes on the dyed fabric due to the high concentration of the dye. These unfixed dyes are difficult to wash off from the dyed fabric. This part The dye will fade during the washing process; at the same time, the chemical bonds formed between some active groups and fibers are easily hydrolyzed, resulting in low wet fastness

The early color fixing agents such as color fixing agent Y are the products of reactions such as formaldehyde, dicyandiamide and ammonium chloride. Although they can improve the fastness of dyed products, they have problems such as high formaldehyde content and endanger human health. Does not meet international textile requirements

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