Patent ID: 6087292
Filing Date: 2000-07-11
Classification: C07F,C08F,Y10S

Abstract:
A catalyst comprising a cocatalyst and a metallocene of the formula I ##STR11## in which M.sup.1 is a metal from group IVb, Vb or VIb of the Periodic Table,R.sup.1 and R.sup.2 are identical or different and are 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.10 -aryl group, a C.sub.8 -C.sub.10 -aryloxy group, aC.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,a C.sub.8 -C.sub.40 -arylalkenyl group or a halogen atom,R.sup.3 in spite of the same indexing, are identical or different and are hydrogen or a polar or polarizable element which is more electronegative than hydrogen, or are hydrocarbon radicals which contain a heteroatom which is more electronegative than hydrogen, with the proviso that R.sup.3 is different from --OR.sup.7, where R.sup.7 is hydrogen, a C.sub.1 -C.sub.10 -alkyl group, a C.sub.1 -C.sub.10 -fluoroalkyl group, a C.sub.6 -C.sub.10 -aryl group, a C.sub.6 -C.sub.10 -fluoroaryl group, a C.sub.2 -C.sub.10 -alkenyl group, a C.sub.7 -C.sub.40 -arylalkyl group, a C.sub.8 -C.sub.40 -arylalkenyl group or a C.sub.7 -C.sub.40 -alkylaryl group and that at least one of the radicals R.sup.3 on the six-membered ring of the indenyl ligand not hydrogen,R.sup.4 ##STR12## .dbd.BR.sup.9, .dbd.AIR.sup.9, --Ge--, --Sn--, --O--, --S--, .dbd.SO, .dbd.SO.sub.2, .dbd.NR.sup.9, .dbd.CO, .dbd.PR.sup.9 or .dbd.P(O)R.sup.9,whereR.sup.9, R.sup.10 and R.sup.11 are identical or different and are a hydrogen atom, a halogen atom,a C.sub.1 -C.sub.10 -alkyl group, a C.sub.1 -C.sub.10 -fluoroalkyl group, a C.sub.6 -C.sub.10 -aryl group, aC.sub.6 -C.sub.10 -fluoroaryl group, a C.sub.1 -C.sub.10 -alkoxy group, a C.sub.2 -C.sub.10 - alkenyl group,a C.sub.7 -C.sub.40 -arylalkyl group, a C.sub.8 -C.sub.40 -arylalkenyl group or a C.sub.7 -C.sub.40 -alkylaryl group, or R.sup.9 and R.sup.10 or R.sup.9 and R.sup.11, in each case together with the atoms connecting them, form a ring,M.sup.2 is silicon, germanium or tin,R.sup.5 and R.sup.6 are identical or different and are as defined for R.sup.9, andm and n are identical or different and are zero, 1 or 2, where m plus n is zero, 1 or 2.