Preparation method of modified natural gutta-percha with improved elasticity

A eucommia gum and modification technology, which is applied in the field of preparation of modified natural eucommia gum, can solve the problems of lack of natural rubber resources and the inability to widely use eucommia gum, and achieve the effects of improving resource scarcity, expanding the scope of use, and increasing elasticity

Active Publication Date: 2016-07-27
ZHEJIANG XUYUAN DUZHONG BIOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the above-mentioned problems in the prior art, provide a preparation method of modified natural eucommia gum that improves the elasticity of eucommia gum, solve the problem that eucommia gum cannot be widely used in th

Method used

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  • Preparation method of modified natural gutta-percha with improved elasticity
  • Preparation method of modified natural gutta-percha with improved elasticity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The preparation method of the modified natural Eucommia gum improving the elasticity of Eucommia gum, the steps are as follows:

[0019] Get eucommia gum and dissolve it in 200ml toluene to make a eucommia gum solution with a mass concentration of 3%, then add the eucommia gum solution into a polytetrafluoroethylene liner reactor, and then put 4.21g of 1,3 -butadiene, 0.1056g of AlCl 3 The reaction was carried out at a temperature of 90°C, and the reaction time was 6 hours. After the reaction, the reaction kettle was taken out, placed in the freezer of the refrigerator and cooled rapidly to room temperature, and the purified product was obtained by precipitation and washing with organic solvent acetone, and finally the purified product was The modified natural Eucommia gum was obtained by drying in a vacuum drying oven to constant weight.

Embodiment 2

[0021] The preparation method of the modified natural Eucommia gum improving the elasticity of Eucommia gum, the steps are as follows:

[0022] Get eucommia gum and dissolve it in 200ml cyclohexane to make a mass concentration of 3% eucommia gum solution, then add the eucommia gum solution into a polytetrafluoroethylene liner reactor, then in the reactor, drop 5.81g of cyclohexane Pentadiene, 0.1257g of AlCl 3 The reaction was carried out at a temperature of 110°C, and the reaction time was 5 hours. After the reaction, the reaction kettle was taken out, placed in the freezer of the refrigerator and cooled rapidly to room temperature, and the purified product was obtained by precipitation and washing with organic solvent acetone, and finally the purified product was The modified natural Eucommia gum was obtained by drying in a vacuum drying oven to constant weight.

Embodiment 3

[0024] Take eucommia gum and dissolve it in 200ml heptane to form a eucommia gum solution with a mass concentration of 2.5%, then add the eucommia gum solution into a polytetrafluoroethylene liner reactor, and then put 4.72g of isoamyl in the reactor Diene, 0.1237g of AlCl 3 The reaction was carried out at a temperature of 130°C, and the reaction time was 4 hours. After the reaction, the reaction kettle was taken out, placed in the freezer of the refrigerator and cooled rapidly to room temperature, and the purified product was obtained by precipitation and washing with organic solvent acetone, and finally the purified product was The modified natural Eucommia gum was obtained by drying in a vacuum drying oven to constant weight.

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Abstract

The invention discloses a preparation method of modified natural gutta-percha with improved elasticity.The method comprises the steps that gutta-percha is dissolved in an organic solvent A to be prepared into a gutta-percha solution, then, the gutta-percha solution is added into a reaction kettle, a conjugated diene monomer and a catalyst are added, then a reaction is performed at the constant temperature, then the reactant is precipitated and washed with an organic solvent B and finally dried in a low-temperature vacuum drying box to obtain constant weight, and therefore the modified natural gutta-percha is obtained.The preparation method has the advantages that the original degree of crystallinity of the gutta-percha is lowered, elasticity of the gutta-percha is increased, and the characteristic of the gutta-percha can reach using standard character of natural rubber, so that the gutta-percha can be widely applied in rubber industry, the condition of lack of natural rubber resources in China is relieved, gutta-percha which is endemic to china, wide in planting area and easy to popularize is efficiently utilized and popularized, the problem that the gutta-percha cannot be widely applied in rubber industry is solved, preparation technology is simple, the using effect is good, and popularization is promoted.

Description

technical field [0001] The invention relates to the rubber field, in particular to a preparation method of modified natural eucommia gum for improving the elasticity of eucommia gum. Background technique [0002] Eucommia gum, the molecular formula is (C 5 h 8 )n, English abbreviation DuzhongGum or EUG, is produced in a unique economic crop in my country - Eucommia tree, its chemical composition is trans-1,4-polyisoprene, and natural rubber cis-1,4-polyisoprene Isoprene is isomers, but their properties are very different. For nearly a hundred years, natural rubber has been playing a pivotal role in the rubber industry as an elastic material, and it is the main source of most rubber products. Eucommia rubber is a leather-like tough substance at room temperature, and pure rubber crystallizes at 10°C. Only when it is 40℃~50℃ can it show elasticity, and it will start to soften at 65℃. These properties make Eucommia gum a hard plastic state at room temperature. It can only be u...

Claims

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Application Information

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IPC IPC(8): C08F253/00
CPCC08F253/00C08F236/06C08F236/04C08F236/08C08F236/18
Inventor 舒妤张学俊张萌萌吴辉翔
Owner ZHEJIANG XUYUAN DUZHONG BIOLOGICAL TECH CO LTD
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