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

A technology of rapeseed oil and fatliquor, which is applied in animal husbandry, chemical treatment and application of small raw hide/big raw hide/leather skin/fur, and can solve the problem that it is easy to be extracted by water or organic solvent and is not suitable for the production of waterproof leather , Insufficient leather fatliquoring effect, etc., to achieve the effect of increasing fullness, significant filling effect, and easy operation

Inactive Publication Date: 2007-05-09
NORTHWEST UNIV(CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 DE3926168, US6294103 adopts the synthesis route of solvent polymerization and higher alcohol derivative lipophilic monomer, which leads to high cost of retanning and fatliquor

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Add 100g of rapeseed oil and 15g of maleic anhydride to a three-necked flask equipped with a magnetic stirrer, heat up to 60°C, stir the two evenly, add 2.3g of initiator azodiethylbutyronitrile, heat up to about 125°C, Constant temperature for 1 hour, add 3.5g styrene, continue constant temperature for 3 hours, cool to normal temperature, add dropwise 3g of 98% concentrated sulfuric acid, stir for 15 minutes, let stand for 2 hours, neutralize with sodium hydroxide to a pH value of 7.

Embodiment 2

[0046] Add 100g of rapeseed oil and 18g of maleic anhydride to a three-necked flask equipped with a magnetic stirrer, raise the temperature to 70°C, stir the two evenly, add 3.0g of initiator benzoyl peroxide, raise the temperature to about 95°C, and keep the temperature constant 0.5 hours, add 4.5g of vinyl acetate, continue to keep constant temperature for 3 hours, cool to room temperature, add 2.5g of 98% concentrated sulfuric acid dropwise, stir for 15 minutes, let stand for 2 hours, neutralize with 30% NaOH aqueous solution until the pH value is 7 .

Embodiment 3

[0048] Add 100g of rapeseed oil and 10g of maleic anhydride to a three-necked flask equipped with a magnetic stirrer, heat up to 80°C, stir the two evenly, add 2.0g of initiator azodiethylbutyronitrile, heat up to about 125°C, Constant temperature for 1 hour, add 1.5g styrene, continue constant temperature for 3 hours, cool to normal temperature, add dropwise 5g of 98% concentrated sulfuric acid, stir for 15 minutes, let stand for 2 hours, neutralize with 30% NaOH aqueous solution until the pH value is 7.

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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 invention relates to a preparation method of a natural oil leather fatliquor, in particular to a preparation method of a 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 molecular chai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F222/06C08F285/00C08F4/04C08F4/32C14C9/00
Inventor 卢荣徐大鹏卢行芳张粉艳
Owner NORTHWEST UNIV(CN)
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