Coloring agent capable of preventing fading of leather and preparation method of coloring agent

Abstract

The invention discloses a coloring agent capable of preventing the fading of leather and a preparation method of the coloring agent. The coloring agent contains the following raw materials in parts byweight: 5-10 parts of curcumine, 5-10 parts of a chestnut shell pigment, 1-2 parts of dibutyl phthalate, 3-6 parts of triglyceride, 2-3 parts of gelatin, 4-7 parts of wax ester, 2-5 parts of a herbaviolae extracting solution, 1-3 parts of nano-composite semi-chrome tanning aid, 0.5-1 part of a surfactant, 0.5-0.8 part of a diluent and 40-50 parts of deionized water. The coloring agent is safe and environment-friendly, and the leather processed by virtue of the coloring agent has relatively good wear resistance, washing resistance and light fastness and is unlikely to fade.

Description

technical field [0001] The invention relates to a dyeing agent, in particular to a dyeing agent for preventing leather fading and a preparation method thereof. Background technique [0002] Leather is generally dyed with acid dyes, metal complex dyes or mordant dyes. Among them, dyeing with acid dyes is only dyed by ionic bonds, the wet fastness is quite poor, and the blackness is poor; dyeing with metal complex dyes is very harmful to the leather material. Large, the damage to the leather surface after dyeing is relatively large, and the molecular structure of the dye contains heavy metal ions; while the mordant dye needs to add hexavalent chromium ions during the dyeing process, which pollutes the environment very much, and the dyeing process is also relatively complicated. , brightness are all relatively poor; In addition, the dyeing effect of the existing leather dyes is not good, and it is often necessary to fix the color, but the general chemical raw materials are stil...

AI Technical Summary

Problems solved by technology

[0002] Leather is generally dyed with acid dyes, metal complex dyes or mordant dyes. Among them, dyeing with acid dyes is only dyed by ionic bonds, the wet fastness is quite poor, and the blackness is poor; dyeing with metal complex dyes is very harmful to the leather material. Large, the damage to the leather surface after dyeing is relatively large, and the molecular structure of the dye contains heavy metal ions; while the mordant dye needs to add hexavalent chromium ions during the dyeing process, which pollutes the environment very much, and the dyeing process is also relatively complicated. In addition, the existing leather dyes have poor dyeing effect and often need to be fixed, but even after the general chemical raw materials are fixed, they are still easy to fade after repeated washing