| abstract |
The invention relates to a method for producing homopolymers and copolymers of isobutene by the continuous cationic polymerization of isobutene or mixtures of isobutene with ethylenically unsaturated comonomers in the presence of an initiator system comprising: i) a Lewis acid selected among covalent metal-halogen compounds and covalent semimetal-halogen compounds; ii) at least one aprotic organic compound (I) having at least one functional group (FG) which, under polymerization conditions, forms a carbocation or a cationogenic complex with the Lewis acid, in an organic solvent that is inert to the Lewis acid. The inventive method is characterized in that the polymerization is carried out in a tubular continuous flow reactor that has a number of bends with an alternating bending direction. |