| 摘要 |
<p>The invention relates to unsupported or supported catalyst compositions for alpha-olefin (ethylene and/or propylene) polymerization which comprises (1) a metallocene compound, (2) an inorganic aluminum compound A1(OH)xOy, wherein x is a number from 0 to 3, wherein x + 2y = 3, (3) trimethylaluminum, wherein A1(OH)xOy is used in an amount sufficient to provide an A1(OH)xOy:metallocen molar ration of 5 to 10,000, wherein trimethylaluminum is used in an amount sufficient to provide a trimethylaluminum:metallocene molar ratio of 50 to 10,000, and wherein the two aluminum compounds, (2) and (3), are used in amounts to provide a molar ratio of trimethylaluminum to A1(OH)xOy in the range of from 0.1 to 100.</p> |
