Recovery and recycle of latex produced in used aqueous suspensio

Details Recovery and recycle of latex produced in used aqueous suspensio Recovery and recycle of latex produced in used aqueous suspensio

1972-12-05

1976-01-27

Schofer, Joseph L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 296RB, 260 297UP, 260 855R, 260 855A, 260 855AW, 260 855S, 260 928A, 260 928W, 260 935R, 260 935A, 260 949F, 260 95C, 260880R, 260880B, C08L 900, C08L 4700, C08F22042, C08F11002

Patent

active

039351483

ABSTRACT:
Unreacted monomer in the water phase resulting from a suspension polymerization is polymerized to form a latex, as by the addition of an initiator to the water phase, in continued presence of the organic phase, thus removing from the organic phase, and therefore from the product, unreacted monomer into the water phase and therein also polymerizing the so removed monomer. The latex so obtained is recycled to the system as at least a portion of the aqueous phase for an ensuing polymerizable formulation. The polymer in the recycled latex becomes incorporated in the polymer generated in said ensuing polymerization. The invention is especially suited to the suspension process for producing ABS type products, affording considerably improved and simplified separation of unreacted monomer from the polymer product and conversion of said unreacted monomer to additional polymer avoiding expensive monomer recovery systems.

REFERENCES:
patent: 2802808 (1957-07-01), Hayes
patent: 2948703 (1960-07-01), Schroeder
patent: 3458602 (1969-07-01), Pollock
patent: 3509238 (1970-04-01), Aubrey et al.
patent: 3515692 (1970-06-01), Carrock
patent: 3531548 (1970-09-01), Goldberg
patent: 3644587 (1972-02-01), Finberg
patent: 3663656 (1972-05-01), Ford et al.

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