Preparation of supported cocatalysts

A supported cocatalyst obtained by a process comprising 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;
• R1 are identical or different and are each, independently of one another, hydrogen, halogen, C1-C20-alkyl, C1C 20-haloalkyl, C1-C10-alkoxy, C6-C20-aryl, C6-C20-haloaryl, C6-C20-aryloxy, C7-C40-arylalky, C7-C40-haloarylalkyl, C7-C40-alkylaryl, C7-C40haloalkylaryl or an OSiR23 group, where
• R2 are identical or different and are each hydrogen, halogen, C1-C20-alkyl, C1-C20-haloalkyl, C1-C10-alkoxy, C6-C20-haloaryl, C6-C20-aryloxy, C7-C40-arylalkyl, C7-C40-haloarylalkyl, C7-C40-alkylaryl or C7-C40-haloalkylaryl;
• y is 1 or 2;
• and
• x is 3 minus y.

A process comprising preparing a catalyst system for the polymerization of olefins with a supported cocatalyst, the supported cocatalyst being prepared by

• 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;
• R1 are identical or different and are each, independently of one another, hydrogen, halogen, C1-C20-alkyl, C1-C20-haloalkyl, C1-C10-alkoxy, C6-C20-aryl, C6-C20-haloaryl, C6-C20-aryloxy, C7-C40-arylalky, C7-C40-haloarylalkyl, C7-C40-alkylaryl, C7-C40-haloalkylaryl or an OSiR23 group, where
• R2 are identical or different and are each hydrogen, halogen, C1-C20-alkyl, C1-C20-haloalkyl, C1-C10-alkoxy, C6-C20-aryl, C6-C20-haloaryl, C6-C20-aryloxy, C7-C40-arylalkyl, C7-C40-haloarylalkyl, C7-C40-alkylaryl or C7-C40-haloalkylaryl;
• y is 1 or 2;
• and
• x is 3 minus y.
• and then bringing the supported cocatalyst into contact with
• D) at least one organic transition metal compound.

A catalyst system for the polymerization of olefins, obtained by bringing at least one supported cocatalyst obtained by a process comprising

• 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;
• R1 are identical or different and are each, independently of one another, hydrogen, halogen, C1-C20-alkyl, C1-C20-haloalkyl, C1-C10-alkoxy, C6-C20-aryl, C6-C20-haloaryl, C6-C20-aryloxy, C7-C40-arylalky, C7-C40-haloarylalkyl, C7-C40-alkylaryl, C7-C40-haloalkylaryl or an OSiR23 group, where
• R2 are identical or different and are each hydrogen, halogen, C1-C20-alkyl, C1-C20-haloalkyl, C1-C10-alkoxy, C6-C20-aryl, C6-C20-haloaryl, C6-C20-aryloxy, C7-C40-arylalkyl, C7-C40-haloarylalkyl, C7-C40-alkylaryl or C7-C40-haloalkylaryl;
• y is 1 or 2;
• and
• x is 3 minus y
• into contact with
• D) at least one organic transition metal compound.

A process comprising polymerizing olefins with a catalyst system obtained by bringing at least one supported cocatalyst obtained by a process comprising

• 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;
• R1 are identical or different and are each, independently of one another, hydrogen, halogen, C1-C20-alkyl, C1-C20-haloalkyl, C1-C10-alkoxy, C6-C20-aryl, C6-C20-haloaryl, C6-C20-aryloxy, C7-C40-arylalky, C7-C40-haloarylalkyl, C7-C40-alkylaryl, C7-C40-haloalkylaryl or an OSiR32 group, where
• R2 are identical or different and are each hydrogen, halogen, C1-C20-alkyl, C1-C20-haloalkyl, C1-C10-alkoxy, C6-C20-aryl, C6-C20-haloaryl, C6-C20-aryloxy, C7-C40-arylalkyl, C7-C40-haloarylalkyl, C7-C40-alkylaryl or C7-C40-haloalkylaryl;
• y is 1 or 2;
• and
• x is 3 minus y
• into contact with
• D) at least one organic transition metal compound.