Use of silanes to enhance activity in single-site polymerizations
AssigneeEquistar Chemicals, LP
InventorsKaren E. Meyer, Mark K. Reinking
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Abstract
A process for the polymerization of olefins is disclosed. A boraaryl catalyst precursor and an activator are used in the presence of a silane modifier. A low level of silane modifier enhances the activity of the catalyst.
Claims16
A process which comprises polymerizing an olefin with a catalyst precursor in the presence of an activator and a modifier, wherein the catalyst precursor comprises a Group 3 to 10 transition metal, M, and at least one anionic boraaryl ligand and wherein the modifier is selected from the group consisting of hydrosilanes and polysiloxyhydrosilanes and is used at a level of up to 8,000 ppm Si based upon the amount of polyolefin produced.
Dependencies are inferred from the claim text.