Process for the preparation of a high molecular weight olefin polymer

Claim 1

A process for the preparation of an olefin polymer by polymerization or copolymerization of an olefin of the formula R a --CH═CH--R b , in which R a and R b are identical or different and are a hydrogen atom or a hydrocarbon radical having 1 to 14 carbon atoms, or R a and R b , with the atoms joining them, can form a ring, at a temperature of from -60° to 200° C., under a pressure of 0.5 to 100 bar, in solution, in suspension or in the gas phase, in the presence of a catalyst which is formed from a metallocene as the transition metal compound and a cocatalyst, which comprises using as the metallocene a compound of the formula I ##STR13## in which M 1 is a metal of group IVb of the periodic table, R 1 and R 2 are identical or different and are a hydrogen atom, 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, the radicals R 3 are identical or different and are a hydrogen atom, a halogen atom, a C 1 -C 10 -alkyl group, which can be halogenated, a C 6 -C 10 -aryl group, which can be halogenated, or a --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 4 to R 6 are identical or different and have the meaning given for R 3 , with the proviso that R 4 and R 6 are not hydrogen, R 7 is ##STR14## ═BR 11 , ═AlR 11 , --Ge--, --Sn--, --O--, --S--, ═SO, ═SO 2 , ═NR 11 , ═CO, ═PR 11 or ═P (O) R 11 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 with the atoms joining them, form a ring, M 2 is silicon, germanium or tin, R 8 and R 9 are identical or different and have the meaning given 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.