Process for the preparation of a high molecular weight olefin po

Details Process for the preparation of a high molecular weight olefin po Process for the preparation of a high molecular weight olefin po

1994-04-25

1994-12-20

Schofer, Joseph L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heavy metal containing

556 7, 556 8, 556 12, 556 21, 556 27, 556 28, 556 43, 556 53, 556 58, 502154, C07F 702

Patent

active

053747526

ABSTRACT:
A very active catalyst system for olefin polymerization comprises a cocatalyst, preferably an aluminoxane, and a metallocene 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 is hydrogen, R.sup.4 to R.sup.6 and alkyl or aryl, --(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' can also be a (substituted) hetero atom, and m+n is zero or 1.

REFERENCES:
patent: 5017714 (1991-05-01), Welborn, Jr.
patent: 5132262 (1992-07-01), Rieger et al.
patent: 5243001 (1993-09-01), Winter et al.
patent: 5278264 (1994-01-01), Spaleck et al.
patent: 5296434 (1994-03-01), Carl et al.
Ewen, J. A., et al., J. Am. Chem. Soc. 109:6544-6545 (1987).

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