Halogenated butyl rubber and process therefor

Details Halogenated butyl rubber and process therefor Halogenated butyl rubber and process therefor

C - Chemistry, Metallurgy

08

F

152/114, 402/459

C08F 8/48 (2006.01) C08F 8/18 (2006.01) C08F 210/12 (2006.01)

Patent

CA 1265891

ABSTRACT OF THE DISCLOSURE An improved halogenated butyl rubber wherein the polymer has a conjugated diene content of less than 0.25 mole a % and a halogen content of at least 0.6 wt.%; at least 20 mole % of the halogen being in a primary allylic configuration. The improved halogenated butyl rubbers are prepared by isomeriz ing conventional halogenated butyl rubber utilizing as a cata- lyst either a Friedel-Crafts catalyst or HBr.

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