| abstract |
(57) [Summary] An ethylene polymerization catalyst comprising, on a support, two transition metal components, one of the two transition metal components being in the form of a metallocene. An aluminum alkyl activator for the nonmetallocene transition metal component is also present. The support is an anhydrous material made by reacting (i) a silanol-containing silica impregnated with magnesium alkyl and (ii) an alcohol. This catalyst can be used to produce ethylene copolymers having a bimodal molecular weight distribution in a single reactor. |