| abstract |
This invention relates to single site catalyst supportation methods involving high temperature treatment (≧40° C., e.g., 100-130° C.) to improve catalyst activity for olefin polymerization, e.g., propylene polymerization, and to the supported catalyst systems obtained by the methods, e.g., single site catalyst systems supported on a support having high average particle size (PS≧30 μm), high surface area (SA≧200 m 2 /g), low pore volume (PV≦2 mL/g), and a mean pore diameter range of 1≦PD≦20 nm. |