Methylaluminoxane (MAO) containing residual TMA can serve to both alkylate/activate metallocene dichloride precatalysts for olefin polymerization. Often this requires the inefficient use of a large excess of MAO. Recent experimental evidence has suggested a refined picture for the MAO activation process of metallocenes. Built upon this evidence and better understanding of the overall MAO activation mechanism, new generations of modified supported MAO-based single-site catalysts are being developed which exhibit significantly improved catalyst productivity compared with conventional supported MAO-based catalysts. Furthermore, this improvement can be accomplished without sacrificing the activated metallocene's ability to control desirable polymer properties like molecular weight or it's reactivity towards comonomer.

Improving activation efficiency of non-alkylated single-site catalysts by methylaluminoxane (MAO) for olefin polymerization

247th National Meeting (2014)

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