Modification method for reactive dye for leather

Abstract

The invention belongs to the technical field of light industries, and particularly relates to a modification method for a reactive dye for leather. The modification method for the reactive dye for leather is characterized in that a product applied to the dyeing of leather and products thereof is obtained by reacting the reactive dye with one or more of hydroxycarboxylic acid or salts thereof, amino acid or salts thereof and oligopeptides and introducing carboxyl groups into reactive dye molecules. According to the method, the application fields of the reactive dye are extended, the performance of leather, such as dyeing fastness, washing durability and sweat resistance, can be effectively improved, the utilization rate of the dye can be increased, and the dye content of wastewater can be reduced.

Description

(1) Technical field [0001] The invention belongs to the technical field of light industry, in particular to a method for modifying reactive dyes for leather. (2) Background technology [0002] The color of leather and its products reflects people's aesthetic appeal, and is often the primary evaluation feature for people to choose leather products such as leather shoes, leather clothes, bags, etc. Therefore, leather dyeing is one of the most important processes in the tanning process. At present, acid dyes in the textile industry are mainly used for leather dyeing. The dye molecules form reversible bonds with leather fibers through weak bases such as ionic bonds, leave or van der Waals forces, or are distributed in the gaps between leather fibers in the form of physical precipitation. Therefore, the color of leather The fastness is poor, the leather after dyeing is not resistant to dry and wet rubbing, and the dye content in the dyeing wastewater is high, which is difficu...

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