| 摘要 |
Catalyst systems for the polymerization of C2-C10-alk-1-enes contain, as active components, a) a metallocene complex of the general formula I (* CHEMICAL STRUCTURE *) I where M is titanium, zirconium, hafnium, vanadium, niobium or tantalum, X is halogen or C1--C8-alkyl, Y is carbon, phosphorus, sulfur, silicon or germanium, Z is C1-C8-alkyl, C3-C10-cycloalkyl or C6-C10-aryl, R1 and R2 are identical or different and are each C1-C4-alkyl, R3 to R6 are identical or different and are each hydrogen or C1-C8-alkyl, or two adjacent radicals R3 and R4 and R5 and R6 in each case together form a hydrocarbon ring system of 4 to 15 carbon atoms and n is 0, 1 or 2, and b) an open-chain or cyclic alumoxane compound of the general formula II or III (* CHEMICAL STRUCTURE *) (II) (* CHEMICAL STRUCTURE *) (III) where R7 is C1-C4-alkyl and n is from 5 to 30. The novel catalyst systems are particularly suitable for the preparation of polyalk-1-enes having high molecular weights.
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