Catalyst system using aluminum alkyl with ion-pair metallocene c

Details Catalyst system using aluminum alkyl with ion-pair metallocene c Catalyst system using aluminum alkyl with ion-pair metallocene c

1995-05-24

1997-03-25

Nagumo, Mark

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

Catalyst or precursor therefor

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

502103, 502128, 526351, 526133, C08F 4649

Patent

active

056144571

ABSTRACT:
This invention is for a catalyst system for polymerization of olefins using an ionic metallocene catalyst with aluminum alkyl. The metallocene catalyst is an ion pair formed from a neutral metallocene compound and an ionizing compound. The invention can be used in any method of producing ionic metallocene catalysts. Use of aluminum alkyl with an ionic metallocene catalyst eliminates the need for using methylaluminoxane (MAO). Catalysts produced by the method of this invention have high activity. The invention reduces catalyst poisons which cause low activity, no activity or uncontrolled polymerizations. Polymerization using this catalyst system are reproducible and controllable.

REFERENCES:
patent: 3242099 (1966-03-01), Manyik et al.
patent: 3756998 (1973-09-01), Karadinka
patent: 4808561 (1989-02-01), Welborn, Jr.
patent: 5153157 (1992-10-01), Hlatky et al.

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