Alkali-fast aldehyde-free colour stabilizer and method for preparing the same

Abstract

The invention relates to a color fixing agent and a preparation method thereof. An alkaline-resisting aldehyde-free color fixing agent is a cationic polymer formed by the polymerization reaction of acrylamide, butyl acrylate and epoxy chloropropane. A method for preparing the alkaline-resisting aldehyde-free color fixing agent comprises the ingredients as follows: 10%-35% of acrylamide, 15%-45% of butyl acrylate, 10%-40% of epoxy chloropropane, 5%-13% of hydrochloric acid and 0.1%-1.5% of an initiating agent; and comprises the following steps: adding acrylamide and butyl acrylate under normaltemperature and raising the temperature; adding epoxy chloropropane at 60 DEG C and maintaining the temperature for 10-18 minutes; raising the temperature to 80 DEG C to add the initiating agent and maintaining the temperature for 30 minutes; raising the temperature to the range from 120 DEG C to 130 DEG C, and persistently reacting for 3-4 hours; adding hydrochloric acid for acid cleaning, temperature reduction, neutralization and discharging to obtain the alkaline-resisting aldehyde-free color fixing agent. The invention is quite strong in resisting alkaline and high temperature, is free from color variation when treating the fabrics, and has no influence on chlorine fastness, light fastness and perspiration-light fastness.

Description

technical field [0001] The invention relates to the printing and dyeing industry, in particular to a color fixing agent and a preparation method thereof. Background technique [0002] In the fabric dyeing process, in order to maintain the firmness of the color, people use a color-fixing agent at the end of dyeing. The existing color-fixing agent is a dicyandiamide structure, which can cause serious changes in hue during the color-fixing process of medium and high-temperature dyes, and in the process of alkaline washing due to this type of color-fixing agent It is not resistant to alkali, which will cause serious dye fading and fading, resulting in staining and staining; in addition, this kind of color fixing agent will affect the fastness of the fabric to sunlight and sweat after being fixed. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentioned defects in the existing fabric dyeing, and provide an alkali-resistant form...

AI Technical Summary

Problems solved by technology

The existing color-fixing agent is a dicyandiamide structure, which can cause serious changes in hue during the color-fixing process of medium and high-temperature dyes, and in the process of alkaline washing due to this type of color-fixing agent It is not resistant to alkali, which will cause serious dye fading and fading, resulting in staining and staining; in addition, this kind of fixing agent will affect the fastness of the fabric to sunlight and sweat after being fixed.