Patent ID: 6444766
Filing Date: 2002-09-03
Classification: C08F,Y10S

Abstract:
A process for preparing a supported catalyst, comprising the steps of(1) preparing a copolymer comprising at least monomer units I and II â€ƒwhere 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III or a fulvene compound IIIa â€ƒto give a corresponding copolymer in which at least some of the leaving groups X have been replaced by radicals IIIâ€² or IIIâ€²a â€ƒwhere independently of one another R2, R3, R4 and R5 are hydrogen, C1-C10-alkyl, or substituted or unsubstituted phenyl, or one of them is â€”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)3â€ƒâ€ƒIV M(X3)4â€ƒâ€ƒIVa â€ƒwhere 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.