Polyethylene and method of production thereof

Details Polyethylene and method of production thereof Polyethylene and method of production thereof

C - Chemistry, Metallurgy

08

F

C08F 210/02 (2006.01) C08F 4/80 (2006.01) C08F 10/02 (2006.01) C08F 110/02 (2006.01) C08F 210/16 (2006.01)

Patent

CA 2008912

A polyethylene, having 1 to 60 methyl branches and l to 60 hexyl or higher branches per 1000 carbon atoms, a g-value of 0.5 to 0.8, and a limiting viscosity [?] of 0.005 to 20.0 dl/g as measured at 140 °C in o-dichlorobenzene, and a method for producing the same by polymerizing ethylene using a catalyst system comprising a coordination nickel compound of zero- or two-valent nickel and an aminobis(imino)phosphorane represented by a general formula (I): (see fig.I) where R1, R2, R3 and R4 may be the same with or different from each other and are respectively n-alkyl, isoalkyl, aryl or trialkylsilyl, in the presence of .alpha.-olefin.

Un polyéthylène, comptant 1 à 60 groupes méthyle et l à 60 groupes hexyle ou supérieurs par 1 000 atomes de carbone, un coefficient G de 0,5 à 0,8 et un indice limite de viscosité [?] de 0,005 à 20,0 dl/g, mesuré à 140 degrés C dans le o-dichlorobenzène, et une méthode pour produire ce composé par polymérisation de l'éthylène à l'aide d'un système de catalyse comprenant un composé de coordination du nickel contenant du nickel minéral ou du nickel divalent et un aminobis(imino)phosphorane représenté par la formule générale (I) : (voir fig.I) où R1, R2, R3 et R4 peuvent être identiques ou différents et sont respectivement un groupe n-alkyle, isoalkyle, aryle ou trialkylsilyle, en présence d'une alpha-oléfine.

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