Method for preparing agent of adding grease for graft copolymerization of colza oil

Abstract

This invention relates to a method for preparing colza-oil-grafted copolymerized fatting agent. The method comprises: (1) initiating colza oil and maleic anhydride with an oil-soluble initiator for graft copolymerization; (2) adding one or more of styrene, vinyl acetate and butyl acrylate monomers, and reacting; (3) adding 97% or higher concentrated H2SO4; (4) neutralizing with alkali to pH value of 6.0-8.0. The method has such advantages as easy operation, stable process and no pollution. The product, when used for fatting leather, can improve the quality, softness and toughness of leather, and can tightly bond with leather fibers. The bonded fatting agent does not transfer in leather, and has such advantages as rapid permeation and uniform distribution, thus can make leather soft and moist.

Description

technical field [0001] The present invention relates to a kind of preparation method of natural oil leather fatliquor, especially the preparation method of rapeseed oil graft copolymerization fatliquor. Background technique [0002] Leather fatliquoring is the fatliquoring treatment of leather to allow it to absorb fatliquoring materials. After the fatliquoring agent enters the leather fibers, the neutral oil component in the fatliquoring agent forms an oil film between the fibers and wraps on the fiber surface, while the fatliquoring agent The polar group of the emulsified component reacts chemically with the active points on the macromolecular chain of the leather fiber, and its long-chain hydrophobic structures are arranged neatly outward (relative to the fiber surface). Weaken the interaction between the polar side group and the main chain on the fiber macromolecular chain, enhance the possibility of relative movement of the molecular chain, make the leather fiber molecu...

AI Technical Summary

Problems solved by technology

Although these products can endow leather with various properties of fatliquor, they have the following disadvantages: they cannot be completely absorbed by leather fibers; they are easily extracted by water or organic solvents; after the finished leather is stored or used, the fatliquor in the leather will Migration occurs and the initial effect disappears; it is not suitable for the production of waterproof leather (because a high proportion of hydrophilic groups or emulsifiers will bring water molecules into the leather)

But the fatliquoring effect on leather is not enough

[0008] Patent DE3 926 168, US 6 294 103 adopts the synthesis route of solvent polymerization and higher alcohol derivative lipophilic monomer, which leads to high cost of retanning and fatliquor

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