Patent ID: 6177526
Filing Date: 2001-01-23
Classification: C08F,Y10S

Abstract:
A supported catalyst composition consisting essentially of a combination of components consisting essentially of at least one metallocene catalyst component and at least one cocatalyst component, said combination being supported by a support which is at least one modified inorganic oxide which has been chemically modified by linkages with organic silicon radicals containing at least one of the elements nitrogen, fluorine, phosphorus or sulfur, and wherein said at least one metallocene catalyst component consists essentially of a metallocene compound 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, a NR.sup.12.sub.2 group, where R.sup.12 is a C.sub.1 -C.sub.10 -alkyl group or a C.sub.6 -C.sub.14 -aryl group, or a halogen atom,R.sup.3 to R.sup.8 and R.sup.3' to R.sup.8' are identical or different and are each a hydrogen atom, a C.sub.1 -C.sub.40 -hydrocarbon group which may be linear, cyclic or branched, oradjacent radicals R.sup.4 to R.sup.8 and/or R.sup.4' to R.sup.8' together with the atoms connecting them form a ring system, andR.sup.9 is a bridge which optionally links together two units of the metallocene having the formula (I): ##STR9##whereR.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, orR.sup.10 and R.sup.11 in each case together with the atoms connecting them form one or more rings,a 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 and are each saturated or unsaturated.