C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/622, 402/643
C08F 4/64 (2006.01) C08F 10/02 (2006.01)
Patent
CA 1087799
ABSTRACT OF THE DISCLOSURE An improvement in a process for the preparation of an ethylene homo- polymer or a copolymer of ethylene with an .alpha.-olefin containing 3 to 15 carbon atoms by contacting the monomer or mixture of monomers in solution, suspension or in gas phase at 20° to 250° at a pressure of 1 to 50 bar with a mixed catalyst comprising a chlorine containing titanium (III) compound and an organoaluminum compound in the presence of hydrogen, the improvement residing in employing as the organoaluminum compound a trialkylaluminum compound in an amount of 0.1 to 20 mol per mol titanium (III) compound and including in the polymerization mixture oxygen at a concentration of 0.001 to 0.1 volume percent based upon the amount of ethylene. By carrying out the polymerization by including oxygen in the polymerization reaction mixture and employing tri- alkylaluminum compound as the organoaluminum compound the mean molecular weight of the polymer can be regulated while obtaining a desired molecular weight distribution.
275952
Birnkraut Hans-Walter
Cornils Boy
Falbe Jurgen
Forster Ingrid
Lutze Siegfried
Fetherstonhaugh & Co.
Ruhrchemie Aktiengesellschaft
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