2-substituted disindenylmetallocenes, process for their preparat

Details 2-substituted disindenylmetallocenes, process for their preparat 2-substituted disindenylmetallocenes, process for their preparat

1991-11-08

1992-09-08

Garvin, Patrick P.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Plural component system comprising a - group i to iv metal...

502103, 526160, 556 7, 556 8, 556 11, 556 14, 556 19, 556 20, 556 21, 556 22, 556 43, 556 53, 556 58, C08F 464

Patent

active

051458195

ABSTRACT:
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.

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