Polymerization of olefins
AssigneeE. I. Du Pont de Nemours and Company
InventorsLynda Kaye Johnson, Alison Margaret Anne Bennett, Kerwin D. Dobbs, Alex Sergey Ionkin, Steven Dale Ittel, Ying Wang, Catherine E. Radzewich, Lin Wang, Elisabeth Hauptman
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Abstract
Polymers are produced using transition metal complexes that have sites capable of binding a Lewis acid in close proximity to the metal center.
Claims23
A process for polymerizing an olefin component comprising one or more polymerizable olefins, comprising the step of contacting, under polymerizing conditions, said olefin component with a polymerization catalyst system comprising a group 3-11 transition metal or lanthanide, a coordinating ligand, and a Lewis acid component, wherein the Lewis acid component is:
- (a) neutral and covalently bound to said coordinating ligand, or
- (b) positively charged and bound to a Lewis basic site of said coordinating ligand.
A process for polymerizing an olefin component comprising one or more polymerizable olefins, provided that at least one of said polymerizable olefins is a polar olefin, comprising the step of contacting, under polymerizing conditions, said olefin component with a polymerization catalyst system comprising a group 3-11 transition metal or lanthanide, a coordinating ligand, and a Lewis acid component, wherein the Lewis acid component is:
- (a) neutral and covalently bound to said coordinating ligand, or
- (b) positively charged and bound to a Lewis basic site of said coordinating ligand.
Dependencies are inferred from the claim text.