Process for the preparation of an olefin polymer

Claim 1

A metallocene compound of the formula I ##STR12## in which M 1 is a metal of group IVb, Vb or VIb of the Periodic Table, R 1 and R 2 are identical or different and are hydrogen, a C 1 -C 10 -alkyl group, a C 1 -C 10 -alkoxy group, a C 6 -C 10 -aryl group, a C 6 -C 10 -aryloxy group, a C 2 -C 10 -alkenyl group, a C 7 -C 40 -arylalkyl group, a C 7 -C 40 -alkylaryl group, a C 8 -C 40 -arylalkenyl group or a halogen atom, R 3 and R 4 are identical or different and are a halogen atom, a C 1 -C 10 -alkyl group, which can be halogenated, a C 6 -C 10 -aryl group or an --NR 2 10 , --SR 10 , --OSiR 3 10 , --SiR 3 10 or --PR 2 10 radical, in which R 10 is a halogen atom, a C 1 -C 10 -alkyl group or a C 6 -C 10 -aryl group, R 5 and R 6 are identical or different and have the meaning mentioned for R 3 and R 4 , are additionally can also be hydrogen, ##STR13## in which R 11 , R 12 and R 13 are identical or different and are a hydrogen atom, a halogen atom, a C 1 -C 10 -alkyl group, a C 1 -C 10 -fluoroalkyl group, a C 6 -C 10 -aryl group, a C 6 -C 10 -fluoroaryl group, a C 1 -C 10 -alkoxy group, a C 2 -C 10 -alkenyl group, a C 7 -C 40 -arylalkyl group, a C 8 -C 40 -arylalkenyl group or a C 7 -C 40 -alkylaryl group, or R 11 and R 12 or R 11 and R 13 in each case form a ring with the atoms joining them, or R 11 or R 12 with R 8 or R 9 in each case form a ring together with atoms joining them, M 2 is silicon, germanium or tin, R 8 and R 9 are identical or different and have the meaning mentioned for R 11 and m and n are identical or different and are zero, 1 or 2, m plus n being zero 1 or 2.