Patent ID: 6284851
Filing Date: 2001-09-04
Classification: C07F,C08F,Y10S

Abstract:
A process for preparing polymers based on monomers having a C.dbd.C double bond by homopolymerization or copolymerization of these monomers in the presence of a catalyst system comprising a metallocene complex A) and a compound B) capable of forming metallocenium ions and, optionally, an organometallic compound of main group I, II or III of the Periodic Table of the Elements C), wherein the metallocene complex A) used is a compound of the formula (I) ##STR16##where the substituents and indices have the following meanings:R.sup.1 to R.sup.11 are hydrogen, C.sub.1 -C.sub.10 -alkyl, 5- to 7-membered cycloalkyl which may in turn bear C.sub.1 -C.sub.6 -alkyl groups as substituents, C.sub.6 -C.sub.15 -aryl or arylalkyl, where two adjacent radicals R.sup.1 to R.sup.8 may together form a cyclic group having from 4 to 15 carbon atoms, or Si(R.sup.12).sub.3,where R.sup.12 is C.sub.1 -C.sub.10 -alkyl, C.sub.6 -C.sub.15 -aryl or C.sub.3 -C.sub.10 -cycloalkyl,M is a metal of transition groups III to VI of the Periodic Table of the Elements or a metal of the lanthanide series,X are identical or different and are hydrogen, halogen, C.sub.1 -C.sub.10 -alkyl, C.sub.6 -C.sub.15 -aryl, C.sub.1 -C.sub.10 -alkoxy or C.sub.6 -C.sub.15 -aryloxyandn is 1, 2, 3, 4 or 5, where n corresponds to the valence of M minus 1.