Method for preparing metallocene catalyst and application thereof in ethylene propylene rubber production

Abstract

The invention discloses a preparation method of metallocene catalyst and an application in the production of ethylen-propylene rubber, wherein the preparation method comprises at 0-30 DEG C, under nitrogen gas protection, reacting tetramethyl cyclopentadienyl lithium with MCI4 at a mol ratio of 1 / 2 to prepare (C9H13) MCI3, at 0 to 30 DEG C, under nitrogen gas protection, reacting substituted undenyl ligand and (C9H13) MCI3 at a mol ratio of 1 / 1, to obtain [(C9H6R)(C9H13)]MCI2. The catalyst synthesis method has simple process, high yield, strong operability and benefit for industrial production. In the presence of a metallocene compound catalyst and a catalyst promoter as methylaluminoxane, ethane and propone can be used as main materials to be polymerized for 1-5h in toluene solution at 30 to 70 DEG C and under 1-10kg / cm2 pressure to prepare ethylen-propylene rubber, with simple polymerization process, low catalyst consumption and low production cost. Compared with the prior art, the invention reduces the pollution of vanadium catalyst, protects environment and develops a new route for ethylen-propylene rubber production.

Description

technical field The invention relates to the preparation and application of a catalyst, in particular to the preparation of a metallocene catalyst and its application in the preparation of ethylene-propylene rubber. Background technique Ethylene-propylene rubber (EPR) is a kind of copolymer rubber with ethylene and propylene as basic monomers, which came out after the invention of Ziegler-Natta catalyst and the appearance of polyethylene and polypropylene. It is divided into binary ethylene-propylene rubber (EPM) and There are two types of ethylene propylene diene monomer (EPDM). The former is a copolymer of ethylene and propylene; the latter is a copolymer of ethylene, propylene and a small amount of non-conjugated dienes, two commonly used non-conjugated dienes are ethylidene norbornene (ENB) and dicyclopentadiene (DCPD). Ethylene-propylene rubber has excellent ozone resistance, fire resistance, weather resistance, and anti-aging properties. In addition, the monomer is c...

AI Technical Summary

Problems solved by technology

However, the synthesis of metallocene catalysts generally has the disadvantages of low yield and low purity. For this reason, to explore the synthesis method of metallocene catalysts, improve its yield and purity and apply it to the production of ethylene-propylene rubber, is of great help to improving the current ethylene-propylene rubber. The lack of rubber production technology is of great significance to promote the technological innovation of ethylene propylene rubber production

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