Process for the production of highly reactive polyisobutenes
AssigneeBASF SE
InventorsMartin Bohnenpoll, Jürgen Ismeier, Oskar Nuyken, Mario Vierle, Dirk Kurt Schön, Fritz Kühn
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Abstract
The present invention relates to a process for the production of highly reactive polyisobutenes with a content of terminal vinylidene groupings of greater than 80 mol % and an average molecular weight of 500 to 10,000 Dalton by cationic polymerization of isobutene or of isobutene and monomers copolymerizable with isobutene in the presence of solvent-stabilized transition metal complexes with weakly coordinated anions.
Claims19
A process for the production of highly reactive isobutene homopolymers and copolymers with a content of terminal vinylidene groupings of greater than 80 mol % and an average molecular weight of 500 to 10,000 Dalton, comprising polymerizing an isobutene monomer or an isobutene and a copolymerizable monomer(s) in the presence of a transition metal catalyst of the general formula [M(R1-CN)4-6](A)2, wherein
- M is a metal from the 3rd to 12th periods of the periodic system of elements,
- R1 is a C1-C8 alkyl group and
- A is a weakly coordinating anion.
Dependencies are inferred from the claim text.