Patent ID: 7442667

Claim:
A process for preparing a supported cocatalyst for olefin polymerization, which comprises first reacting A) support bearing functional groups, with B) triethylaluminum, thereby producing a reaction product; and subsequently reacting the reaction product with C) a compound of the formula (I), where A is an atom of group 13 or 15 of the Periodic Table; R 1 are identical or different and are each, independently of one another, hydrogen, halogen, C 1 -C 20 -alkyl, C 1 -C 20 -haloalkyl, C 1 -C 10 -alkoxy, C 6 -C 20 -aryl, C 6 -C 20 -haloaryl, C 6 -C 20 -aryloxy, C 7 -C 40 -arylalky, C 7 -C 40 -haloarylalkyl, C 7 -C 40 -alkylaryl, C 7 -C 40 -haloalkylaryl or an OSiR 2 3 group, where R 2 are identical or different and are each hydrogen, halogen, C 1 -C 20 -alkyl, C 1 -C 20 -haloalkyl, C 1 -C 10 -alkoxy, C 6 -C 20 -aryl, C 6 -C 20 -haloaryl, C 6 -C 20 -aryloxy, C 7 -C 40 -arylalkyl, C 7 -C 40 -haloarylalkyl, C 7 -C 40 -alkylaryl or C 7 -C 40 -haloalkylaryl; y is 1 or 2; and x is 3 minus y.