Olefin polymerization catalyst

Details Olefin polymerization catalyst Olefin polymerization catalyst

1990-10-18

1992-09-29

Schofer, Joseph L.

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

Catalyst or precursor therefor

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

502111, 502121, 502123, 502124, 502125, 502126, 502128, 526118, 526119, 526132, C08F 404

Patent

active

051513994

ABSTRACT:
A complex alkoxide compound containing magnesium, titanium and boron species comprises the reaction product of elemental magnesium, titanium tetraalkoxide, an alkyl borate ester and alkanol at elevated temperature in an inert diluent. This complex alkoxide compound is contacted with a tetravalent titanium halide, a halohydrocarbon and an electron donor to form an olefin polymerization procatalyst. Contact of the procatalyst with an organoaluminum cocatalyst and a selectivity control agent produces a high activity catalyst for the polymerization of lower .alpha.-olefins to polymer product of good properties in good catalyst productivity.

REFERENCES:
patent: 4330649 (1982-05-01), Kioka et al.
patent: 4472521 (1984-09-01), Band
patent: 4540679 (1985-09-01), Arzoumanidis
patent: 4710482 (1987-12-01), Job
patent: 4728705 (1988-03-01), Nestlerode et al.
patent: 4814312 (1989-03-01), Murata et al.

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