Method for continuous production of polyisobutene
AssigneeBASF SE
InventorHans Peter Rath
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Abstract
A process for the continuous preparation of polyisobutene having a number-average molecular weight {overscore (M)}N of from 500 to 50,000 and containing at least 50 mol % of terminal double bonds by one-stage or multistage, continuous polymerization of isobutene in the liquid phase in the presence of a catalyst comprising boron trifluoride and at least one oxygen-containing compound at below +40° C., wherein the liquid reaction phase has a viscosity of from 6 to 20 mm2/s (determined according to DIN 51562), at least in the first polymerization stage, is described.
Claims10
A process for the continuous preparation of polyisobutene having a number-average molecular weight {overscore (M)}N of from 500 to 50,000 and containing at least 50 mol % of terminal double bonds by one-stage or multistage, continuous polymerization of isobutene in the liquid phase in the presence of a catalyst comprising boron trifluoride and at least one oxygen-containing compound at below +40° C., wherein the liquid reaction phase has a viscosity of from 6 to 20 mm2/s (determined according to DIN 51562), at least in the first polymerization stage.
Dependencies are inferred from the claim text.