Process for making high molecular weight isobutylene polymers

Abstract From the Canadian patent

There is disclosed a process for polymerizing a cationically polymerizable olefin comprising the step, of polymerizing at least one cationically polymerizable olefin at a subatmospheric pressure in the, presence of a cationic polymerization catalyst system which comprises an initiator and an activator, which together form a reactive cation and non-co-ordinating anion the , activator being prepared by the, reaction of a metalloid compound of formula (R1R2R3)M with a co-initiator the , co-initiator being, selected from the group consisting of an alcohol a thiol, a carboxylic acid, a thiocarboxylic acid and the like.