HALOGENATION OF STAR-BRANCHED BUTYL RUBBER WITH IMPROVED NEUTRALIZATION

摘要

A process for halogenating star-branched butyl rubber is provided wherein water and a wetting agent or wetting agent prec- ursor are added to a solution comprising the star-branched butyl rubber, sol id particles of branching agent and an organic solvent prior to the neutralization step to increase the rate of neutralization of t he hydrogen halide by-product of the halogenation reac- tion.