Supported catalyst system, process for its production and its use in polymerizing olefins

A catalyst system comprising at least one passivated support and at least one metallocene having the formula I

• where
• M1 is a metal of group IVb of the Periodic Table of the Elements,
• R1 and R2 are identical or different and are each a hydrogen atom, a C1-C10-alkyl group, a C1-C10-alkoxy group, a C6-C20-aryl group, a C6-C10-aryloxy group, a C2-C10-alkenyl group, an OH group, an NR122 group, where R12 is a C1-C2-alkyl group or a C6-C14-aryl group, or a halogen atom,
• R5 and R5′ are identical or different and are each a C1-C40-hydrocarbon group which may be linear, cyclic or branched,
• R3 to R4, R6 to R8, R3′ to R4′ and R6′ to R8′ are identical or different and are each a hydrogen atom or a C1-C40-hydrocarbon group which may be linear, cyclic or branched, or adjacent radicals R6 to R8 and/or R6′ to R8′ together with the atoms connecting them form a ring system,
• R9 is a bridge, selected from the group consisting of
• where R10 and R11 are identical or different and are each a hydrogen atom, a halogen atom or a C1-C40-group such as a C1-C20-alkyl, a C1-C10-fluoroalkyl group, a C1-C10-alkoxy group, a C6-C14-aryl group, a C6-C10-fluoroaryl group, a C6-C10-aryloxy group, a C2-C10-alkenyl group, a C7-C40-arylalkyl group, a C7-C40-alkylaryl group or a C8-C40-arylalkenyl group, or R10 and R11, in each case together with the atoms connecting them, form one or more rings and x is an integer from zero to 18, M2 is silicon, germanium or tin,
• and the rings A and B are identical or different, saturated or unsaturated.