Method of stabilizing isoolefin polymer slurries

Details Method of stabilizing isoolefin polymer slurries Method of stabilizing isoolefin polymer slurries

C - Chemistry, Metallurgy

08

L

400/5168

C08L 23/20 (2006.01) C08F 10/10 (2006.01) C08F 210/10 (2006.01) C08L 53/00 (2006.01)

Patent

CA 1140286

ABSTRACT Polymerization slurries of elastomeric isoolefin homopolymers and copolymers, such as butyl rubber, in diluents such as methyl chloride are effectively stabilized against agglomeration of polymer particles through addition of minor proportions of (i) a preformed copolymer stabilizer having both a lyophobic or lyophilic portion, or (ii) an in situ formed stabilizer from a functional lyophilic stabilizer percursor capable of copolymerizing or otherwise chemically bonding with the polymer product. Agglomeration of polymer products is effectively prevented, yielding a number of sig- nificant processing advantages. The process is especially adaptable to the production of isobutylene-isoprene butyl rubber.

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