摘要 |
Bimetallic catalyst for producing polyethylene resins with a bimodal molecular weight distribution, its preparation and use. The catalyst is obtainable by a process which includes contacting a support material with an organomagnesium component and carbonyl-containing component. The support material so treated is contacted with a non-metallocene transition metal component to obtain a catalyst intermediate, the latter being contacted with an aluminoxane component and a metallocene component, This catalyst may be further activated with, e.g., alkylaluminum cocatalyst, and contacted, under polymerization conditions, with ethylene and optionally one or more comonomers, to produce ethylene homo- or copolymers with a bimodal molecular weight distribution and improved resin swell properties in a single reactor. These ethylene polymers are particularly suitable for blow molding applications. |
申请人 |
UNIVATION TECHNOLOGIES, LLC |
发明人 |
MINK, ROBERT, I.;NOWLIN, THOMAS, E.;SHIRODKAR, PRADEEP, P.;DIAMOND, GARY, M.;BARRY, DAVID, B.;WANG, CHUNMING;FRUITWALA, HITESH, A.;ONG, S., CHRISTINE |