Ethylene propylene diene monomer and preparation method thereof

A technology of EPDM rubber and ethylene, which is applied in the field of EPDM rubber and its preparation, can solve the problems of environmental pollution and vulcanization speed, and achieve the effect of good processing performance

Inactive Publication Date: 2013-07-31
FUYANG JINGLUE CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the technical and economical problems of the third monomer in the existing EPDM rubber, as well as the problems of environmental pollution and vulcanization speed, the invention provides a cyclopentene-dicyclopentadiene liquid low molecular weight copolymer It is the third monomer of EPDM rubber, and the preparation method of EPDM rubber is provided. In the third monomer cyclopentene-dicyclopentadiene liquid low molecular weight copolymer, cyclopentene and dicyclopentadiene Both are ring-opening polymerization, and there are still double bonds in the polymer chain. The double bonds of polycyclopentadiene are on the straight chain, and the double bonds of polydicyclopentadiene are on the straight chain and side chain. They are both Non-conjugated double bonds, the cyclopentene-dicyclopentadiene liquid low molecular weight copolymer is colorless or light yellow, odorless, non-toxic, has good solubility in hydrocarbon solvents, and contains a large number of non-conjugated double bonds in the molecular chain Bond, with the basic characteristics of being the third monomer of ethylene-propylene rubber copolymerization

Method used

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  • Ethylene propylene diene monomer and preparation method thereof
  • Ethylene propylene diene monomer and preparation method thereof
  • Ethylene propylene diene monomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0029] Preparation of Cyclopentene-Dicyclopentadiene Liquid Low Molecular Weight Copolymer 1

[0030] In a 0.5L reactor replaced with nitrogen, 54g of cyclopentene, 10g of dicyclopentadiene, 256g of toluene, 0.03MWCl 6 Toluene solution 7.5mL, 0.1M tetrachlorophenol toluene solution 3.7mL, 1.0M 1-butene hexane solution 15.7mL, stir evenly and keep the reaction material temperature at 0°C, then add 0.1M triisobutyl Aluminum toluene solution 6.7mL, keep the temperature and react for 3.0hr, add 32mL ethanol solution containing 1% 2,6-di-tert-butyl-4-methylphenol into the reactor after the polymerization reaction to terminate the reaction, and then release the glue Coagulate with ethanol, and dry the obtained polymer in a vacuum oven at 50° C. to a constant weight for use. The weight of the polymer is 52 g.

[0031] Obtaining cyclopentene content in cyclopentene-dicyclopentadiene liquid low molecular weight copolymer is 84.5% (wt), and dicyclopentadiene content is 15.5% (wt), and ...

preparation example 2

[0033] Preparation of cyclopentene-dicyclopentadiene liquid low molecular weight copolymer 2

[0034] Preparation Example 1 was basically repeated, except that 48 g of cyclopentene and 16 g of dicyclopentadiene were added respectively, the polymerization reaction temperature was 15° C., and the 1.0 M 1-butene hexane solution was 6.7 mL.

[0035] Obtaining cyclopentene content in cyclopentene-dicyclopentadiene liquid low molecular weight copolymer is 79.5, and dicyclopentadiene content is 21.5% (wt), and trans structure content is 90% in polycyclopentene, polymer molecular weight is 9500, the molecular weight distribution is 1.8.

preparation example 3

[0037] Preparation of cyclopentene-dicyclopentadiene liquid low molecular weight copolymer 3

[0038] Preparation Example 1 was basically repeated, except that 60 g of cyclopentene and 4 g of dicyclopentadiene were added respectively, the polymerization reaction temperature was -10° C., and the 1.0 M 1-butene hexane solution was 30 mL.

[0039] Obtaining cyclopentene content in cyclopentene-dicyclopentadiene liquid low molecular weight copolymer is 93.0, and dicyclopentadiene content is 7.0% (wt), and trans polymerization structure content is 70% in the polycyclopentene, polymer molecular weight It is 1800, and the molecular weight distribution is 1.8.

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Abstract

The invention relates to ethylene propylene diene monomer and a preparation method thereof. The ethylene propylene diene monomer comprises 30 to 70%(mol) of ethylene. A third monomer is a liquid low-molecular weight copolymer obtained by copolymerization of cyclopentene and dicyclopentadiene. The ethylene propylene diene monomer comprises 0.5 to 12%(mol) of the third monomer. The third monomer liquid low-molecular weight copolymer of cyclopentene and dicyclopentadiene is a liquid low-molecular weight copolymer containing different double bond structures and having different double bond contents and comprises 3 to 30%(wt) of dicyclopentadiene. The preparation method of the liquid low-molecular weight copolymer has simple processes and a low cost. The liquid low-molecular weight copolymer has no pollution on the environment, an adjustable molecular weight and good dissolvability in a hydrocarbon solvent. The ethylene propylene diene monomer obtained by the preparation method has good sulfuration performances, can be sulfurated by sulphur, has a sulfuration rate close to a sulfuration rate of butadiene styrene rubber, and has good processing performances. The ethylene propylene diene monomer can be widely used for automobile parts, building materials, wires and cables, heat-resistant rubber pipes, high-grade seal pipes and polyolefin modification.

Description

technical field [0001] The present invention relates to a kind of ethylene-propylene-diene rubber and its preparation method, more specifically, to a kind of ethylene-propylene-diene rubber with cyclopentene-dicyclopentadiene liquid low molecular weight copolymer as the third monomer and its preparation method . Background technique [0002] Ethylene-propylene rubber (EPR) is a general term for a binary polymer (EPM) obtained by copolymerizing ethylene and propylene or a terpolymer (EPDM) obtained by copolymerizing ethylene, propylene and a non-conjugated diene monomer. Compared with other rubber varieties, EPR has the following advantages: First, the main chain does not contain or contain a small amount of double bonds, making it an ozone-resistant, aging-resistant, chemical-resistant, high-temperature resistant hydrocarbon rubber; second, the specific gravity It is the lightest among elastomers, which helps to use the least material in a certain volume; third, it has exce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/18C08F4/68
Inventor 孙育成
Owner FUYANG JINGLUE CHEM TECH
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