Ethylene propylene diene monomer and preparation method thereof

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...

Examples

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.

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...

Examples

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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