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US 5,345,024 AGranted
Alpha-olefin polymers
AssigneeThe Lubrizol Corporation
InventorCurtis R. Scharf
Life of this patent
Estimating the term…
Abstract
This invention deals with viscosity improvers which are obtained through the use of a mixed catalyst system comprising a tertiary organo halide and a Lewis acid catalyst.
Claims29
A process for preparing a liquid alpha-olefin polymer comprising contacting at least one alpha-olefin with a catalyst system comprising a tertiary organo halide and a Lewis acid catalyst under polymerization conditions thereby obtaining the alpha-olefin polymer wherein the alpha-olefin polymer has a polymodal distribution with peak molecular weight maximums at 2,000 to 5,000 and at 50,000 to 75,000 wherein the organo is hydrocarbyl.
Dependencies are inferred from the claim text.