Metallocenes containing ligands of 2-substituted idenyl derivati

Details Metallocenes containing ligands of 2-substituted idenyl derivati Metallocenes containing ligands of 2-substituted idenyl derivati

1991-11-08

1994-01-04

Schofer, Joseph L.

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

Organic compounds

Heavy metal containing

556 9, 556 11, 556 14, 556 19, 556 21, 556 22, 556 43, 556 58, 502117, 502152, 526129, 526160, C07F 728, C07F 900, C07F 1100

Patent

active

052762084

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, m+n is zero or 1, and R.sup.10 is hydrogen, form, together with aluminoxanes as cocatalysts, a very effective catalyst system for the preparation of polyolefins of high stereospecificity and high melting point.

REFERENCES:
patent: 4769510 (1988-09-01), Kaminsky et al.
patent: 4871705 (1989-10-01), Hoel

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