Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Patent
1993-04-28
1998-09-08
Wu, David W.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
502103, 502104, 502117, 502125, 526114, 526116, 526118, 526119, C08F 0464
Patent
active
058045244
ABSTRACT:
The present invention is a catalyst system to produce polymer blends in a single reactor, polymer blends of isotactic polyolefins and syndiotactic polyolefins. The catalyst system is a combination of at least one metallocene catalyst and at least one conventional supported Ziegler-Natta catalyst. The multi-catalyst system is obtained by mixing the components of at least one metallocene catalyst and at least one conventional supported Ziegler-Natta catalyst. The metallocene catalyst comprises solid complx of a metallocene compound and an ionizing agent. The conventional supported Ziegler-Natta catalyst comprises an aluminum alkyl and a transition metal compound with, optionally, an electron donor.
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J. Am. Chem. Soc. 1988, 110 6255-6256 Ewen et al. "Syndiotactic Propylene Polymerization with Group & Metallocene".
International Symposium on Recent Developments in Olefin Polymerization Catalyst, 1988, pp. 501-515, Keii et al. "Catalytic Olefin Polymerization" . Hackh's Chemical Dictionary, 4th Edition, p. 27.
Reddy Baireddy Raghava
Shamshoum Edwar Shoukri
Cheairs M. Norwood
Fina Technology, Inc.
Wheelington Jimmy D.
Wu David W.
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