Recovery and recycle of latex produced in used aqueous suspension medium

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 i...

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Bibliographische Detailangaben
Hauptverfasser:	CHILDERS, CLIFFORD W, CLARK, EARL
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	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.