05145819 is referenced by 246 patents and cites 12 patents.

The novel metallocenes of the formula I ##STR1## in which, preferably, M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.3 and R.sup.4 are hydrogen, R.sup.5 and R.sup.6 are alkyl or haloalkyl, --(CR.sup.8 R.sup.9).sub.m --R.sup.7 --(CR.sup.8 R.sup.9).sub.n -- is a single- or multi-membered chain in which R.sup.7 may also be a (substituted) hetero atom, and m+n is zero or 1, form, together with aluminoxanes as cocatalysts, a very effective catalyst system for the preparation of polyolefins of high molecular weight.

Title
2-substituted disindenylmetallocenes, process for their preparation, and their use as catalysts in the polymerization of olefins
Application Number
7/790234
Publication Number
5145819
Application Date
November 8, 1991
Publication Date
September 8, 1992
Inventor
Volker Dolle
Kelkheim
DE
Jurgen Rohrmann
Liederbach
DE
Walter Spaleck
Liederbach
DE
Martin Antberg
Hofheim am Taunus
DE
Andreas Winter
Glashutten
DE
Assignee
Hoechst Aktiengesellschaft
DE
IPC
C08F 4/64
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