Patent ID: 7285513

Claim:
A process for preparing a catalyst for olefin polymerization comprising the steps by bringing (A) at least one organic transition metal compound, (B) a mixture of at least two different organo metallic compounds of formula (V), M 1 (R 1 ) r (R 2 ) s (R 3 ) t (V) where M 1 is an alkali metal, an alkaline earth metal or a metal of group 13 of the Periodic Table, R 1 is hydrogen, 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 , halo-C 7 -C 40 -alkylaryl, halo-C 7 -C 40 -arylalkyl or halo-C 1 -C 10 -alkoxy, R 2 and R 3 are each hydrogen, 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, r is an integer from 1 to 3 and s and t are integers from 0 to 2, where the sum r+s+t corresponds to the valence of M 1 , and C) at least one cation-forming compound into contact with one another, wherein the organic transition metal compound A) is firstly combined with the mixture of the organo metallic compounds B).