Patent ID: 6271164
Filing Date: 2001-08-07
Classification: C08F,Y10S

Abstract:
A catalyst system comprising at least one passivated support and at least one metallocene having the formula I ##STR8##whereM.sup.1 is a metal of group IVb of the Periodic Table of the Elements,R.sup.1 and R.sup.2 are identical or different and are each a hydrogen atom, a C.sub.1 -C.sub.10 -alkyl group, a C.sub.1 -C.sub.10 -alkoxy group, a C.sub.6 -C.sub.20 -aryl group, a C.sub.6 -C.sub.10 -aryloxy group, a C.sub.2 -C.sub.10 -alkenyl group, an OH group, an NR.sup.12.sub.2 group, where R.sup.12 is a C.sub.1 -C.sub.2 -alkyl group or a C.sub.6 -C.sub.14 -aryl group, or a halogen atom,R.sup.5 and R.sup.5' are identical or different and are each a C.sub.1 -C.sub.40 -hydrocarbon group which may be linear, cyclic or branched,R.sup.3 to R.sup.4, R.sup.6 to R.sup.8, R.sup.3' to R.sup.4' and R.sup.6' to R.sup.8' are identical or different and are each a hydrogen atom or a C.sub.1 -C.sub.40 -hydrocarbon group which may be linear, cyclic or branched, or adjacent radicals R.sup.6 to R.sup.8 and/or R.sup.6' to R.sup.8' together with the atoms connecting them form a ring system,R.sup.9 is a bridge, selected from the group consisting of ##STR9## ##STR10##where R.sup.10 and R.sup.11 are identical or different and are each a hydrogen atom, a halogen atom or a C.sub.1 -C.sub.40 -group such as a C.sub.1 -C.sub.20 -alkyl, a C.sub.1 -C.sub.10 -fluoroalkyl group, a C.sub.1 -C.sub.10 -alkoxy group, a C.sub.6 -C.sub.14 -aryl group, a C.sub.6 -C.sub.10 -fluoroaryl group, a C.sub.6 -C.sub.10 -aryloxy group, a C.sub.2 -C.sub.10 -alkenyl group, a C.sub.7 -C.sub.40 -arylalkyl group, a C.sub.7 -C.sub.40 -alkylaryl group or a C.sub.8 -C.sub.40 -arylalkenyl group, or R.sup.10 and R.sup.11, in each case together with the atoms connecting them, form one or more rings and x is an integer from zero to 18, M.sup.2 is silicon, germanium or tin,and the rings A and B are identical or different, saturated or unsaturated.