UN PROCEDIMIENTO DE TRATAR UN CAUCHO BUTILICO BROMADO PARA ISOMERIZARLO

摘要

An improved halogenated butyl rubber has a conjugated diene content of less than 0.25 mole % and a halogen content of at least 0.6 wt.%; at least 20 mole % of the halogen is in a primary allylic configuration. Such halogenated butyl rubbers are prepared by isomerizing conventional halogenated butyl rubber utilizing as a catalyst either a Friedel-Crafts catalyst or HBr.