SONICATION OF CATALYST IN THE PRODUCTION OF AN UNSATURATED ISOOLEFIN COPOLYMER

SONICATION OF CATALYST IN THE PRODUCTION OF AN UNSATURATED ISOOLEFIN COPOLYMER

A process for producing an unsaturated isoolefin copolymer involves: sonicating a solution of an initiator system in an organic solvent, the initiator system comprising a Lewis acid catalyst and a proton source, to produce a sonicated initiator solution, the sonicating performed at an energy input o...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: BOURQUE, Jeremy, DAVIDSON, Gregory J. E, JAYATISSA, Kuruppu
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:A process for producing an unsaturated isoolefin copolymer involves: sonicating a solution of an initiator system in an organic solvent, the initiator system comprising a Lewis acid catalyst and a proton source, to produce a sonicated initiator solution, the sonicating performed at an energy input of 100 J/mL or greater, based on volume of the initiator solution; and then, contacting the sonicated initiator solution with a reaction mixture of at least one isoolefin monomer and at least one copolymerizable unsaturated monomer in an organic diluent to produce the unsaturated isoolefin copolymer. Sonication of the initiator solution improves catalyst activity, thereby improving conversion of the monomers during production of the unsaturated isoolefin copolymer.