Lanxess Corporation

Mark J Drewitt

Gabor Kaszas

Gerhard Langstein

Martin Bohnenpoll

Stephan Glander

Rui Resendes

R Resendes

Michael C Baird

K Rajesh Kumar

The present invention relates to a continuous process for producing polymers at conversions ranging from 50% to 95% having a Mooney viscosity of at least 25 Mooney-units and a gel content of less than 15 wt. % containing repeating units derived from at least one isoolefin monomer, more than 4.1 mol % of repeating units derived from at least one multiolefin monomer and optionally further copolymerizable monomers in the presence of AlCland a suitable proton source (e.g. water) or cationogen and at least one multiolefin cross-linking agent wherein the process is conducted in the absence of transition metal compounds and organic nitro compounds.

Process for production of high-isoprene butyl rubber

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Sarnia, Canada

Mark J Drewitt