Method for the production of polyisobutene

C - Chemistry – Metallurgy – 08 – F

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C08F 4/14 (2006.01) C08F 10/10 (2006.01) C08F 110/10 (2006.01)

Patent

CA 2498830

Disclosed is a method for producing polyisobutene containing at least 75 mole percent of terminal vinylidene groupings. According to the inventive method, isobutene or hydrocarbon mixtures containing isobutene is/are polymerized in a liquid phase in the presence of a boron trifluoride complex catalyst having the composition a(BF3): b(Co1): c(Co2), wherein Co1 represents at least one tertiary alcohol, Co2 represents a compound selected among water, primary alcohols, secondary alcohol, dialkyl ethers, alkanecarboxylic acids, and phenols, the ratio c:b ranges from 0.9 to 1.8, and the ratio (b+c):a ranges from 0.9 to 3Ø

L'invention concerne un procédé de fabrication de polyisobutène présentant une teneur en groupements vinyle terminaux d'au moins 75 % molaires, consistant à polymériser isobutène ou des mélanges d'hydrocarbures contenant isobutène en phase gazeuse, en présence d'un catalyseur à complexe de trifluorure de bore de composition a(BF¿3?): b(Co1): c(Co2), Co1 étant au moins un alcool tertiaire, Co2 étant au moins un composé choisi parmi l'eau, des alccols primaires, un alcool secondaire, des dialkyléthers, des acides alcano-carboxyliques et des phénols, le rapport c : b étant de 0,9 à 1,8, et le rapport (b+c) : a étant de 0,9 à 3,0.

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