C. Bergemann et G. Luft, APPLICATION OF A CATIONIC ACTIVATED METALLOCENE CATALYST SYSTEM IN THE COPOLYMERIZATION OF ETHYLENE AND 1-BUTENE UNDER HIGH-PRESSURE, Journal of molecular catalysis. A, Chemical, 135(1), 1998, pp. 41-45
The activation of metallocene catalyst by a cationic activator in the
presence of triisobutylaluminium was examined in the copolymerization
of ethylene and 1-butene under high pressure of 150 MPa and temperatur
es of 463 to 473 K. A continuously operated micro-pilot plant unit equ
ipped with a stirred autoclave was used. The catalyst productivity det
ermined from the amount of polymer and the catalyst feed was in the ra
nge of 100 to 300 kg polymer/g zirconium. The resulting copolymers wer
e analyzed for their physical properties and the amount of 1-butene in
corporated. The results of the polymerization with the metallocene/cat
ionic activator system were compared to the data obtained earlier usin
g methyl aluminoxane as the activator. (C) 1998 Elsevier Science B.V.
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