Method for Producing Highly Reactive Isobutylene Homo-or Copolymers Using Boron-Containing Catalyst Complexes

摘要

Preparation of highly reactive isobutene homo- or copolymers having M_n=from 500 to 45 000 by polymerizing isobutene in the liquid phase in the presence of a dissolved, dispersed or supported boron-containing catalyst complex, by using, as the catalyst complex, a protic acid compound I; [H⁺]_m+1[R¹R²R³B—(-A^m+—BR⁵R⁶—)_n—R⁴]^(m+1)−.L_x   (I);R¹ to R⁶ each independently aliphatic, heterocyclic or aromatic, fluorinated hydrocarbon radicals having in each case from 1 to 18 carbon atoms, or silyl groups comprising C₁ to C₁₈ hydrocarbon radicals,A nitrogen-containing bridging member which forms covalent bonds to the boron atoms via its nitrogen atoms,L neutral solvent molecules,n=0 or 1,m=0 or 1 andx is ≧0.