Catalyst composition for polymerizing alpha-olefins
AssigneeMobil Oil Corporation
InventorsLuanne M. Allen, Robert O. Hagerty, Richard O. Mohring
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Abstract
A catalyst composition for polymerizing alpha-olefins is prepared by reacting a transition metal compound, e.g., titanium, with trimethylaluminum catalyst activator. In a preferred embodiment, the catalyst is supported on a porous refractory support and is prepared by additionally reacting a magnesium compound or an organomagnesium composition with the support. Also disclosed is a process for polymerizing alpha-olefins in the presence of the catalyst of the invention. The polymer products have higher bulk density and produce films of greater strength than polymers prepared with similar catalysts utilizing different alkyl-aluminum activators, e.g., triethylaluminum and tri-isobutylaluminum.
Claims56
In a process for preparing an alpha-olefin polymerization catalyst composition comprising a transition metal compound, a magnesium compound and a metal alkyl, the improvement comprising using trimethylaluminum as the metal alkyl.
In an alpha-olefin polymerization catalyst composition comprising a transition metal compound, a magnesium compound and a metal alkyl, the improvement comprising using trimethylaluminum as the metal alkyl.
Dependencies are inferred from the claim text.