| http://www.w3.org/ns/prov#value | - A further embodiment of the present invention is a novel method of preparing non-agglomerating homopolymers of C4 -C7 isoolefins and butyl rubber copolymers by polymerizing the corresponding monomers at temperatures from about -90??? C. to about -20??? C. in the presence of a Lewis Acid cationic polymerization catalyst in a polymerization diluent selected from the group consisting of methyl chlori
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