Patent ID: 6433111
Filing Date: 2002-08-13
Classification: C08F,Y10S

Abstract:
A process for preparing a supported catalyst, which comprises the following steps:A) reacting an inorganic support material with a metal compound of the formula I M1(R1)r(R2)s(R3)t(R4)uâ€ƒâ€ƒI â€ƒwhere M1 is an alkali metal, an alkaline earth metal or a metal of main group III or IV of the Periodic Table, R1 is hydrogen, C1-C10-alkyl, C6-C15-aryl, alkylaryl or arylalkyl each having from 1 to 10 carbon atoms in the alkyl radical and from 6 to 20 carbon atoms in the aryl radical, R2 to R4 are hydrogen, halogen, C1-C10-alkyl, C6-C15-aryl, alkylaryl, arylalkyl, alkoxy or dialkylamino each having from 1 to 10 carbon atoms in the alkyl radical and from 6 to 20 carbon atoms in the aryl radical, r is an integer from 1 to 4 and s, t and u are integers from 0 to 3, where the sum r+s+t+u corresponds to the valence of M1, B) reacting the material obtained as described in A) with a metallocene complex and a compound capable of forming metallocenium ions and C) subsequently reacting the resulting material with a metal compound of the formula II M2(R5)o(R6)p(R7)qâ€ƒâ€ƒII â€ƒwhere M2 is an alkali metal, an alkaline earth metal or a metal of main group III of the Periodic Table, R5 is hydrogen, C1-C10-alkyl, C6-C15-aryl, alkylaryl or arylalkyl each having from 1 to 10 carbon atoms in the alkyl radical and from 6 to 20 carbon atoms in the aryl radical, R6 and R7 are hydrogen, halogen, C1-C10-alkyl, C6-C15-aryl, alkylaryl, arylalkyl or alkoxy each having from 1 to 10 carbon atoms in the alkyl radical and from 6 to 20 carbon atoms in the aryl radical, o is an integer from 1 to 3 and p and q are integers from 0 to 2, where the sum o+p+q corresponds to the valence of M2, wherein the supported catalyst obtained in this way or its precursor is brought into contact with a Lewis base in an amount of from 0.3 to <2 mole per mole of metallocene complex.