Lanxess International Sa

Arlanxeo Singapore Pte. Ltd.

Sarah Chadder

Lorenzo Ferrari

Dana K Adkinson

Conrad Siegers

Sean Malmberg

Gregory J E Davidson

Patrick Crewdson

Gregory Davidson

The present invention relates to ionomers comprising a reaction product of the reaction between a halogenated isoolefin copolymer and at least one phosphorus based nucleophile comprising at least one pendant vinyl group. The present invention also relates to a method of preparing and curing these ionomers.

Phosphonium ionomers comprising pendant vinyl groups and processes for preparing same

A polyisoolefin-based polymer composition having a multimodal molecular weight distribution and a level of unsaturation of greater than about 4 mol % is described, which can be prepared by co-polymerizing 70-96 vol % isoolefin monomer and 30-4 vol % &#x3b2;-pinene or multi-olefin monomer, based on volume of isoolefin monomer and &#x3b2;-pinene or multi-olefin monomer, in a solution comprising 0-30 vol % aliphatic hydrocarbon diluent, based on volume of the solution, and an alkylaluminum halide initiator system. The polyisoolefin-based polymer composition has a multimodal molecular weight distribution having a first molecular weight fraction having a peak molecular weight (Mp) of less than about 300 kg/mol, and a second molecular weight fraction having a peak molecular weight (Mp) of greater than about 1000 kg/mol or at least 3 times greater than the Mp of the first molecular weight fraction.

Highly unsaturated multi-modal polyisoolefin composition and process for preparation thereof

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London, Canada

Sarah Chadder