Method for producing carrier-borne catalysts

A process for preparing a supported catalyst, comprising the steps of

• (1) preparing a copolymer comprising at least monomer units I and II
• where
• A is a direct chemical bond or a group
• X is a substitutable leaving group,
• R1 is identical or different at each occurrence and is hydrogen, substituted or unsubstituted aryl or branched or unbranched alkyl or alkenyl, and
• n is an integer from 1 to 8,
• (2) reacting in polymer-analogous manner the copolymer obtained in (1) with a cyclopentadienyl compound III or a fulvene compound IIIa
• to give a corresponding copolymer in which at least some of the leaving groups X have been replaced by radicals III′ or III′a
• where independently of one another
• R2, R3, R4 and R5 are hydrogen, C1-C10-alkyl, or substituted or unsubstituted phenyl, or one of them is —QR6R7X2 in which
• Q is carbon, CR6R7C, germanium or silicon,
• R6 and R7 independently of one another are hydrogen, methyl, ethyl or phenyl, and
• X2 is halogen, methyl, methoxy or ethoxy;
• and
• R8 radicals are identical or different C1- to C4-alkyl radicals or substituted or unsubstituted phenyl, and
• (3) reacting the modified copolymer obtained in (2) with a compound IV or IVa
• CpM(X3)3 IV
• M(X3)4 IVa
• where
• Cp is a substituted or unsubstituted cyclopentadienyl radical,
• M is Ti, Zr or Hf, and
• X3 is halogen, hydrogen, C1-C10-alkyl, C1-C10-alkoxy or amido, it being possible for different substituents X3 to have different meanings.