| abstract |
Preparation of highly reactive isobutene homo- or copolymers with M n =from 500 to 1 000 000 by polymerizing isobutene from technical C 4 hydrocarbon streams having an isobutene content of from 1 to 90% by weight in the liquid phase in the presence of a dissolved, dispersed or supported catalyst complex, by using, as the catalyst complex, a protic acid compound I n [H + ] k Y k− .L x (I) Y k− weakly coordinating k-valent anion which comprises at least one hydrocarbon moiety, L neutral solvent molecules and x≧0. |