| 摘要 |
This invention comprises a catalyst system and a process using such catalyst system for the production of high molecular weight polyolefins, particularly polyethylene and higher poly- alpha -olefin, and copolymers of ethylene and/or alpha -olefins with other unsaturated monomers, including diolefins, acetylenically unsaturated monomers and cyclic olefins. The catalyst system comprises three components, a monocyclopentadienyl Group IV B transition metal compound, an alumoxane, and a modifier. The catalyst system is highly active, at low ratios of aluminum to the Group IV B transition metal, hence catalyzes the production of a polyolefin product containing low levels of catalyst metal residue. |
