Separation of polymer slurries

Details Separation of polymer slurries Separation of polymer slurries

2011-07-19

2011-07-19

Cheung, William K (Department: 1762)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S124300, C526S346000, C526S348700, C422S131000

Reexamination Certificate

active

07981991

ABSTRACT:
Methods for producing elastomers or elastomeric compositions are provided. One or more C4to C7isoolefins and one or more comonomers can be polymerized in the presence of a diluent comprising one or more hydrofluorocarbons to provide a slurry comprising polymer product, unreacted monomer and the diluent. The slurry can be extruded to separate at least a portion of the diluent from the polymer product. The separated diluent can be recycled for polymerizing the one or more C4to C7isoolefins.

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