Method of controlling the relative activity of the different...

Details Method of controlling the relative activity of the different... Method of controlling the relative activity of the different...

C - Chemistry, Metallurgy

08

F

C08F 4/70 (2006.01) C08F 2/38 (2006.01) C08F 4/62 (2006.01) C08F 10/00 (2006.01)

Patent

CA 2616053

Method of preparing olefin polymers, which comprises the polymerization of at least one .alpha.-olefin in the presence of a hybrid catalyst to produce a polymer comprising at least a higher molecular weight polymer component and a lower molecular weight polymer component in the presence of water in an amount of from 2 to 100 mol ppm and/or carbon dioxide in an amount of from 2 to 100 mol ppm, in each case based on the total reaction mixture, in order to alter the ratio of the higher molecular weight polymer component to the lower molecular weight polymer component. This enables the ratio of the higher molecular weight component to the lower molecular weight component to be controlled selectively.

L'invention concerne un procédé de fabrication de polymères oléfiniques, comprenant la polymérisation d'au moins une .alpha.-oléfine en présence d'un catalyseur hybride de manière à obtenir un polymère comprenant au moins un composant polymérique de poids moléculaire plus élevé et un composant polymérique de poids moléculaire plus faible en présence d'eau à hauteur de 2 à 100 mol ppm et/ou de dioxyde de carbone à hauteur de 2 à 100 mol ppm, dans chacun des cas par rapport au mélange réactionnel total, afin de modifier le rapport entre le composant polymérique de poids moléculaire plus élevé et le composant polymérique de poids moléculaire plus faible. Ce procédé permet de contrôler de manière sélective le rapport entre le composant de poids moléculaire plus élevé et le composant de poids moléculaire plus faible.

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