| 摘要 |
<p>This application discloses triphenyl carbenium NCA s as catalyst activators for a class of asymmetrically bridged hafnocene catalyst precursors. These catalyst precursors are activated into olefin polymerization catalysts and are suitable for gas, solution, and slurry phase polymerization reactions. The disclosed bridge is methylenyl or silanylenyl based and is optionally, alkyl or aryl substituted. The catalytic activity of the disclosed hafnocene catalyst precursors is substantially enhanced over identical catalysts that are activated with other activators.</p> |
