Process for the preparation of an olefin polymer using specific

Details Process for the preparation of an olefin polymer using specific Process for the preparation of an olefin polymer using specific

1993-08-03

1996-04-02

Nazario-Gonzales, Porfirio

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

Organic compounds

Heavy metal containing

556 8, 556 11, 556 12, 556 21, 556 27, 556 28, 556 43, 556 53, 556 81, 556 87, 502117, 502152, 526129, 526160, C07F 728, C07F 1700, C07F 900, C07F 1100

Patent

active

055042325

ABSTRACT:
A highly effective catalyst system for the polymerization of olefins comprises a cocatalyst, preferably an aluminoxane, and a metallocene of the formula I ##STR1## where M.sup.1 =Zr or Hf, R.sup.1 and R.sup.2 =(C.sub.1 -C.sub.4)-alkyl or chlorine, R.sup.3, with the proviso that at least one of the radicals R.sup.3 is not hydrogen, =hydrogen, F, Cl, --OR.sup.7, --NR.sup.7 R.sup.8, --P(O)R.sup.7 R.sup.8, --P(OR.sup.7).sub.2 or SR.sup.7, R.sup.4 is a ##STR2## radical, and m plus n are zero or 1.

REFERENCES:
patent: 5329033 (1994-07-01), Spaleck et al.
Chemical Abstracts, vol. 117, 1992, Abstract No. 27208v.
Lee et al., Organometallics, vol. 11, No. 6, pp. 2115-2122 (1992).

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