Process for the ionic polymerisation of ethylene under high...

Details Process for the ionic polymerisation of ethylene under high... Process for the ionic polymerisation of ethylene under high...

C - Chemistry, Metallurgy

08

F

402/419, 402/610

C08F 10/00 (2006.01) C08F 4/02 (2006.01) C08F 4/64 (2006.01) C08F 10/02 (2006.01)

Patent

CA 1077198

A B S T R A C T Ethylene is polymerised by contact at a temperature of between 180°C and 340°C and under a pressure of between 200 and 2,500 bars in at least one stirred reaction zone, with a catalyst system comprising (a) an activator which is an alkyl- aluminum or an alkylsiloxalane, and (b) a compound of the formula (TiCla) (MgCl2)y (AlCl3)z (RMgCl)b in which 2?a ?3, y?2, 0?z ?1/3 and 0 ?b ?1, and R is an aliphatic or aromatic hydrocarbon radical, and the proportions of (a) and (b) are chosen so as to give an atomic ratio Al/Ti of between 1 and 10.

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