C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
C07F 7/00 (2006.01) C07F 9/00 (2006.01) C07F 11/00 (2006.01) C08F 4/622 (2006.01) C08F 10/00 (2006.01) C08F 297/08 (2006.01) C08F 4/639 (2006.01) C08F 4/6392 (2006.01) C08F 110/06 (2006.01)
Patent
CA 2104036
Abstract of the disclosure Process for the preparation of polyolefins A process for the preparation of an olefin polymer by polymerization or copolymerization of an olefin of the formula Ra-CH=CH-Rb, in which Ra and Rb are identical or different and are a hydrogen atom or a hydrocarbon radical having 1 to 14 carbon atoms, or Ra and Rb, together with the atoms connecting them, can form a ring, at a temperature of from -60 to 200°C, at a pressure of from 0.5 to 100 bar, in solution, in suspension or in the gas phase, in the presence of a catalyst formed from a metallocene in the meso-form or a meso:rac mixture, with meso:rac > 1:99, as transition-metal compound and a cocatalyst, wherein the metallocene is a compound of the formula I, Image (I) in which M1 is Zr or Hf, R1 and R2 are identical or different and are methyl or chlorine, R3 and R6 are identical or different and are methyl, isopropyl, phenyl, ethyl or trifluoromethyl, R4 and R5 are hydrogen or as defined for R3 and R6, or R4 forms an aliphatic or arom- atic ring with R6, or adjacent radicals R4 form a ring of this type, and R7 is a Image or Image radical, and m plus n is zero or 1.
Antberg Martin
Bachmann Bernd
Dolle Volker
Kuber Frank
Rohrmann Jurgen
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Hoechst Aktiengesellschaft
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