METHOD FOR THE REMOVAL OF ISOBUTENE OLIGOMERS FROM AN ISOBUTENE POLYMER

摘要

A method for the removal of isobutene oligomers from an isobutene polymer is disclosed, wherein the isobutene polymer is stripped with vapours of a saturated hydrocarbon having at least 8 carbon atoms and the isobutene oligomers are at least partly driven off. Problematic isobutene oligomers are largely removed without affecting the reactivity of the isobutene polymer (expressed as content of methylidene double bonds).