Use of aluminoxane and metallocene catalysts in the preparation of a polyolefin

Olefins of the formula R-CH=CH-R (R and R = H or C1-C20-alkyl) are polymerised in the presence of a catalyst comprising an aluminoxane and a metallocene of the formula I or II (R and R = halogen or hydrocarbon radicals; R and R = hydrocarbon radicals which can form a sandwich structure with M ; R =...

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Bibliographic Details
Main Authors HANS-FRIEDRICH HERRMANN, LUDWIG BOHM
Format Patent
LanguageEnglish
Published 07.10.1993
Edition5
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:Olefins of the formula R-CH=CH-R (R and R = H or C1-C20-alkyl) are polymerised in the presence of a catalyst comprising an aluminoxane and a metallocene of the formula I or II (R and R = halogen or hydrocarbon radicals; R and R = hydrocarbon radicals which can form a sandwich structure with M ; R = a single- or multimember bridge). The solvent or suspending agent used is a polar aprotic solvent, in particular a halogenated hydrocarbon, having a static dielectric constant epsilon of greater than 3 at 20 DEG C. Polymers having a very high molecular weight are obtained in very high yield.
Bibliography:Application Number: AU19910076186