05278264 is referenced by 192 patents and cites 13 patents.

A very effective catalyst system for olefin polymerization consists of a cocatalyst, preferably an aluminoxane, and a metallocene of the formula (I) ##STR1## in which, preferably, M.sup.1 is Zr, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.3 to R.sup.6 are alkyl, --(CR.sup.8 R.sup.9).sub.m --R.sup.7 --(CR.sup.8 R.sup.9).sub.n -- is a chain having one or more members, in which R.sup.7 can also be a (substituted) hetero atom, and m+n is zero or 1. The catalyst system leads to polymers of variable molecular weight and stereotacticity, depending on the substituents R.sup.3 to R.sup.6 chosen, at polymerization temperatures which are relevant in industry.

Title
Process for the preparation of an olefin polymer
Application Number
7/934573
Publication Number
5278264
Application Date
August 24, 1992
Publication Date
January 11, 1994
Inventor
Martin Antberg
Hofheim am Taunus
DE
Jurgen Rohrmann
Kelkheim
DE
Walter Spaleck
Liederbach
DE
Agent
Connolly and Hutz
Assignee
Hoechst
DE
IPC
C08F 4/64
C08F 2/06
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