Preparation method of leather greasing agent

Abstract

The invention discloses a prepration method of a leather greasing agent and belongs to the technical field of leather chemical engineering preparation. The preparation method comprises the steps that cultures in leather leftover materials are extracted and cultured, and induced culturing and fermentation are conducted through thiamine to obtain target culture fermented liquor; then the target culture fermented liquor is blended with grease and flavonoid substances extracted from flavedo, modification is conducted accordingly, the grease molecular weight is decreased, the permeability is enhanced through coordination of the liquor and the flavonoid substances, the number of active hydroxyl groups is increased, and the bonding force is increased; and finally, under catalysis of platonic oxide, maleic anhydride is adopted for modification, the surface activity is improved, and therefore the leather greasing agent is prepared. The leather greasing agent prepared through the preparation method is good in surface activity, capable of being effectively combined with leather fibers and strongly bonded to leather, good in greasing effect and wash resistance, free of environmental pollution after being used, and excellent in market popularization value.

Description

technical field [0001] The invention discloses a preparation method of a leather fatliquoring agent, which belongs to the technical field of leather chemical preparation. Background technique [0002] For thousands of years, leather collagen material has been the most important fiber material used by human beings. To obtain high-quality leather requires many processing procedures, and the fatliquoring process is one of the important processes to obtain high-quality leather. Leather fatliquor refers to the ability to effectively disperse the adhesion between leather fibers, infiltrate, absorb, and wrap on leather fibers in a physical and chemical way, significantly improve the friction resistance between leather fibers, and make the moisture volatilize and be affected by external forces The skin fiber is easy to bend, the leather body is soft, and the material has obvious moisturizing effect. Leather fatliquor has an important influence on the quality and performance of leat...

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: the existing leather fatliquor has low surface activity, weak binding force with leather fibers, poor adhesion state on leather, poor washing resistance, and easy to pollute the environment The defect is to provide a method for culturing by extracting the bacteria in the leather leftovers, inducing culture and fermentation with thiamine to obtain the fermentation broth of the target bacteria, and then mixing and modifying it with the oil and flavonoids in the extracted orange peel , reduce the molecular weight of oil, cooperate with flavonoids to increase permeability, increase hydroxyl active groups, enhance binding force, and finally under the catalysis of platinum oxide, modify the surface activity through maleic anhydride to increase the surface activity, thereby preparing the method of leather fatliquor , the present invention first shakes and filters leather leftovers and glucose solution, and air-dries and ferments them, then mixes and sterilizes the nutrients obtained by yeast extract, sucrose, etc., then mixes them with fermented leather leftovers, and uses Rinse with bacterial water and collect the modified bacterial liquid, then grind orange peel, dichloromethane, etc., gas explosion treatment, collect the supernatant liquid after centrifugation, mix with the modified bacterial liquid, let it stand, and then use activated clay to stir and decolorize. Finally, after filtration, the decolorized liquid is distilled to obtain the remaining liquid, which is stirred and refluxed with platinum oxide, maleic anhydride, etc. and filtered, and the filtrate is collected to obtain the leather fatliquoring agent. The leather fatliquoring agent prepared by the present invention has better It has excellent surface activity, can effectively combine leather fibers, and strongly adheres to leather, which has a good fatliquoring effect, and has good washing resistance, and has no pollution to the environment after use, and has excellent marketing value.