Process for the manufacture of halogenated elastomers

Details Process for the manufacture of halogenated elastomers Process for the manufacture of halogenated elastomers

C - Chemistry, Metallurgy

08

F

402/399

C08F 8/20 (2006.01) C08C 19/12 (2006.01)

Patent

CA 1205945

ABSTRACT OF THE DISCLOSURE Continuous halogenation of olefinically unsaturated rubber is achieved in an extruder-reactor employing reactants, conditions and design features directed to maximizing mixing and contact of the rubber with the halogenating agent and neutralizing agent while simultaneously minimizing side reactions and polymer degradation. The rubber passes through three extruder-reactor zones under controlled conditions to achieve hologenation: feed, reaction, neutralization; optionally a wash and exit zone can be utilized. The halogenated rubber, for example, halogenated butyl rubber can be vulcanized in the absence of sulfur, e.g., with zinc oxide and stearic acid, and is useful in all applications where commercially available chlorinated and brominated rubbers are presently employed.

412526

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