PROCESS FOR PRODUCING TRANSITION METALK CATALYST COMPONENT FOR ZIEGLER CATALYST SYSTEM AND ITS USE FOR HOMO- AND COPOLYMERIZATION OF ETHYLENE

摘要

A transition-metal catalyst component for a Ziegler catalyst system, obtainable by 1) mixing, in an organic solvent, an inorganic oxidic support material with 1.1) a transition-metal starting component and 1.2) a compound of the formula BXnYmRp or SiXnYmRq or a mixture thereof, in which R is a C1- to C18-aliphatic or aromatic hydrocarbon radical, X is an OR radical, Y is chlorine, bromine or hydrogen, and n is 0 and n+m+p=3 or n+m+q=4, 2) removing the solvent by evaporation, 3) mixing the solid-phase intermediate from step (2) with 3.1) an organoaluminium catalyst component of the formula AIRmX3-m, in which R is a C1- to C18-hydrocarbon radical m is a number from 1 to 3 and X is an OR radical, chlorine, bromine or hydrogen, and 3.2) an organic carboxylic acid ester or an organic silicon compound or a mixture thereof, in an organic solvent, and 4) if desired, isolating the solid-phase intermediate by filtration, washing and drying, and the use thereof for the homopolymerisation or copolymerisation of ethylene (ethene).