Patent ID: 7414005

Claim:
A process for preparing a catalyst composition for olefin polymerization, which comprises preparing a catalyst solid in a first step by bringing A) at least one support, B) at least one organic compound of formula (II): where A is an atom of main group 13 of the Periodic Table or a partially halogenated or perhalogenated C 1 -C 20 -alkyl- or C 6 -C 40 -aryl group, R 4 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 -arylalkyl, C 7 -C 40 -haloarylalkyl, C 7 -C 40 -alkylaryl or C 7 -C 40 -haloalkylaryl or an OSiR 3 5 group, where R 5 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 at least 1 and x is an integer from 0 to 41, C) at least one organometallic compound and D) at least one organic transition metal compound into contact with one another, thereby forming a reaction product; drying the reaction product to form the catalyst solid; and then bringing the catalyst solid into contact with E) at least one organoaluminum compound of the formula (I) AlR 1 R 2 R 3 (I) where R 1 is C 1 -C 10 -alkyl, C 6 -C 15 -aryl, halo-C 1 -C 10 -alkyl, halo-C 6 -C 15 -aryl, C 7 -C 40 -arylalkyl, C 7 -C 40 -alkylaryl, C 1 -C 10 -alkoxy or halo-C 7 -C 40 -alkylaryl, halo-C 7 -C 40 -arylalkyl or halo-C 1 -C 10 -alkoxy and R 2 and R 3 are identical or different and are each, independently of one another, hydrogen, halogen, C 1 -C 10 -alkyl, C 6 -C 15 -aryl, halo-C 1 -C 10 -alkyl, halo-C 6 -C 15 -aryl, C 7 -C 40 -arylalkyl, C 7 -C 40 -alkylaryl, C 1 -C 10 -alkoxy or halo-C 7 -C 40 -alkylaryl, halo-C 7 -C 40 -arylalkyl or halo-C 1 -C 10 -alkoxy, in a second step before polymerization, wherein the first and second steps are at from −10° C. to 80° C. for a period of from 0.5 minutes to 10 hours.