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A kind of epoxidized EPDM rubber, preparation method and elastomer

An EPDM rubber and epoxidized ternary technology, which is applied in the rubber field, can solve the problems of serious side reactions, etc., and achieve the effects of improving epoxidation efficiency, retaining epoxy groups, and reducing the probability of side reactions

Active Publication Date: 2020-07-31
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the diversity of epoxidation side reactions and the ring opening of epoxy groups under acid catalysis is unavoidable; moreover, the higher the degree of epoxidation, the side reactions will be very serious

Method used

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  • A kind of epoxidized EPDM rubber, preparation method and elastomer
  • A kind of epoxidized EPDM rubber, preparation method and elastomer
  • A kind of epoxidized EPDM rubber, preparation method and elastomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] (1) In a 2000ml three-necked flask, add 60g of EPDM rubber (the third monomer is norbornene, the content is 9wt%) and 1000ml of toluene, and start stirring until a uniform transparent rubber solution is formed. After the rubber is completely dissolved, adjust the temperature of the water bath at 50°C. After the temperature is constant, place a spherical condenser, open the condensate, and add 1.05g of formic acid ((HCOOH:C=C is 1:2)) and 3g of phase transfer agent Tween 80 (polyoxyethylene sorbitan monooleate) (5% of rubber). Wait for about 10 minutes until the formic acid and phase transfer agent are stirred evenly. Weighing 10.24g concentration simultaneously is 30% hydrogen peroxide aqueous solution (H 2 o 2 : C=C is 3:1), added to the constant pressure dropping funnel. After the formic acid and phase transfer agent are uniformly dispersed, open the constant pressure dropping funnel and start to add hydrogen peroxide dropwise, and the formic acid is added dropwise...

Embodiment 2

[0067] The difference from Example 1 is the reaction time, stirring speed and type of EPDM rubber. In this example, the reaction temperature is 20°C, the reaction time is 72h, the stirring speed is 50r / min, and the EPDM rubber The third monomer is dicyclopentadiene with a content of 1 wt%. Other techniques and consumption are identical with embodiment 1.

Embodiment 3

[0069] The difference from Example 1 is the reaction time, stirring speed and type of EPDM rubber. In this example, the reaction temperature is 80°C, the reaction time is 0.5h, the stirring speed is 1000r / min, and the EPDM The third rubber monomer is 1,4-hexadiene with a content of 15wt%. Other techniques and consumption are identical with embodiment 1.

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Abstract

The invention discloses epoxidized ethylene propylene diene monomer, a preparation method and an elastomer. The epoxidation degree of the epoxidized ethylene propylene diene monomer is more than 90%.The preparation method includes the steps that (1), the ethylene propylene diene monomer is completely dissolved in a solvent; (2), formic acid and a phase transfer agent are added and stirred, and ahydrogen peroxide aqueous solution is dropwise added for reaction; and (3), epoxidized ethylene propylene diene monomer is washed to a neutral state with an alkali solution or distilled water, precipitated and dried to obtain the epoxidized ethylene propylene diene monomer. The ethylene propylene diene monomer elastomer is prepared by mixing and vulcanizing the following raw material components inparts by weight: 100 parts of the epoxidized ethylene propylene diene monomer and 0.1-15 parts of a cross-linking agent. According to the epoxidized ethylene propylene diene monomer and the preparation method and the elastomer, the reaction process is easy to control, the raw materials used for the reaction are low in price and environmentally friendly; and secondly, the catalyst effect is good,the reaction efficiency is high, the selectivity is good, and the side reaction is less.

Description

technical field [0001] The invention relates to the technical field of rubber, and furthermore, relates to an epoxidized EPDM rubber, a preparation method and an elastomer, and a preparation method for a novel cross-linked elastomer based on the epoxidized EPDM rubber. Background technique [0002] It has become a hot spot to modify the epoxidation of olefin rubber containing unsaturated double bonds and put it into use. Through modification, not only the performance of rubber is improved and changed, but also its use is broadened. Among the many chemical modification methods, the most simple and easy to operate, the most widely used is epoxidation. Due to the introduction of polar groups, the polarity of the rubber greatly increases after epoxidation, which greatly increases the performance of using it with certain polar rubbers. [0003] At present, the means of rubber epoxidation modification mainly adopts the following three chemical modification methods for reaction: (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F210/18C08F8/08C08L23/30
CPCC08F8/08C08L23/30C08F210/18
Inventor 张立群张刚刚李晓林卢咏来刘超豪赵秀英
Owner BEIJING UNIV OF CHEM TECH