Patent ID: 6949614

Claim:
A catalyst system comprising: A) at least one metallocene, B) at least one Lewis base of the formula I M 1 R 3 R 4 R 5 (I) wherein R 3 , R 4 and R 5 are identical or different and are each a hydrogen atom, a halogen atom, a C 1 -C 20 -alkyl, C 1 -C 20 -haloalkyl, C 6-C 40 -aryl, C 6 -C 40 -haloaryl, C 7 -C 40 -alkylaryl or C 7 -C 40 -arylalkyl group or two or all three of the radicals R 3 , R 4 and R 5 may be joined to one another via C 2 -C 20 units, M 1 is an element of main group V of the Periodic Table of the Elements, C) at least one support, D) and at least one organoboron or organoaluminum compound which is made up of units of the formula II [(R 6 )—X—M 2 (R 8 )—X—(R 7 )] k (II) wherein R 6 and R 7 are identical or different and are each a hydrogen atom, a halogen atom, a boron-free C 1 -C 40 group or an Si(R 9 ) 3 group, where R 9 is a boron-free C 1 -C 40 group, R 8 can be identical to or different from R 6 and R 7 and is a hydrogen atom, a halogen atom, a C 1 -C 40 group or an OSi(R 9 ) 3 group, X may be identical or different and are each an element of group V or VIa of the Periodic Table of the Elements or an NH group, M 2 is an element of group IIIa of the Periodic Table of the Elements and k is a natural number from 1 to 100, and is covalently bound to the support.