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US 5,629,253 AGranted
Polymerization catalyst systems, their production and use
AssigneeExxon Chemical Patents Inc.
InventorMain Chang
Life of this patent
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Abstract
This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst of the invention provides for a supported bulky ligand transition metal catalyst which when utilized in a polymerization process substantially reduces the reactor fouling and sheeting particularly in a slurry phase polymerization process.
Claims13
A method for producing a supported catalyst system, said method comprising the steps of:
- reacting a water containing support material with a solution of an alkyl aluminum compound which is at a temperature in the range of from about 10.degree. C. to about -20.degree. C. and maintaining a constant temperature that is in the range of from 30.degree. C. to about -20.degree. C. during the reaction wherein the mole ratio of the metal of the alkyl aluminum compound to the water content of the support material is greater than 0.7;
- and adding at least one metallocene catalyst component.
Dependencies are inferred from the claim text.