Ethylene-propylene-diene methylene using liquid-state oligomers of diolefin as third monomer and method for preparing same

A technology of EPDM rubber and oligomers, which is applied in the field of EPDM rubber and its preparation, can solve the problems of slow vulcanization speed, easy explosion, high price, etc., achieve good copolymerization ability, and be conducive to industrialization , good processing performance
CN101709105BActive Publication Date: 2012-11-07CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
Publication Date
2012-11-07

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Abstract

The invention provides ethylene-propylene-diene methylene taking liquid-state oligomers of diolefin as a third monomer and a method for preparing same. Combined propylene cells account for 20 to 45 molar percent of the ethylene-propylene-diene methylene, the third monomer which is a liquid-state oligomer of diolefin accounts for 0.5 to 15 molar percent of the ethylene-propylene-diene methylene, and the total molar percentage of the combined cells of ethylene, propylene and the third monomer is 100 percent; and the liquid-state oligomer of diolefin of the third monomer is selected from liquid-state oligomers with different double-bond structures and double-bond contents, including the liquid polybutadiene containing 20 to 80 percent of 1,2-strucutres and liquid polyisoprene containing over90 percent of 1,4-strucutres. Because the side chains contain more double bonds, the ethylene-propylene-diene methylene has good curing and processing properties, and can vulcanize sulfur; the polymer has the molecular weight distribution indexes from 2 to 10; the ethylene-propylene-diene methylene can be used for manufacturing industrial rubber products of automobile parts, waterproof materials,telecom cables and the like.
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Description

technical field

[0001] The invention belongs to EPDM rubber with diene liquid oligomer as the third monomer and a preparation method thereof. Background technique

[0002] Ethylene-propylene rubber (EPR) is a kind of copolymerized rubber with ethylene and propylene as basic monomers after the invention of Ziegler-Natta catalyst and the advent of polyethylene and polypropylene. The industrial production methods of ethylene-propylene rubber mainly include solution polymerization and suspension polymerization. Compared with other rubber varieties, EPR has the following advantages: 1. The main chain does not contain double bonds and is completely saturated, making it an ozone-resistant, aging-resistant, chemical-resistant, high-temperature-resistant hydrocarbon rubber; 2. Specific gravity It is the lightest among elastomers, which helps to use the least material in a certain volume; 3. It has excellent insulation performance and can be an excellent material for wires and cables...

Claims

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