High temperature polymerization process using ionic catalysts to produce polyolefins
AssigneeExxon Chemical Patents Inc.
InventorsHoward W. Turner, Jo Ann M. Canich, Bernard J. Folie
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Abstract
This invention relates to a process for polymerizing olefins at high pressures in a polymerization medium at high temperature utilizing an ionic olefin polymerization catalyst derived from the reaction of a cyclopentadienyl-containing transition metal compound having a hydrolyzable alkyl or hydride ligand with an ion exchange activator. The ionic catalyst system has been found to be highly active at temperatures of 160.degree. C. or greater, to provide a process capable of producing polymer products of desired chemical and physical properties at high production rates.
Claims18
A process for polymerizing one or more monomers from the group consisting of olefins, diolefins and acetylenically unsaturated monomers, comprising contacting at a temperature up to about 300 .degree. C. and a pressure from above about 500 bar to about 3445 bar in a suitable solvent or diluent, said monomers with an active polymerization catalyst comprising a cation of a mono- or bis(cyclopentadienyl) derivative of a group IV-B metal, and a compatible non-coordinating anion comprising boron or a plurality of boron atoms, said anion being sufficiently labile to permit displacement by said monomers.
Dependencies are inferred from the claim text.