Method for reducing residual monomers in liquid systems by adding an oxidation-reduction initiator system

Method for reducing residual monomers in liquid systems by adding an oxidation-reduction initiator system

A process is described for reducing the residual monomer content in a liquid solution, mixture, melt, suspension or dispersion of a polymer by postpolymerization with addition of a redox initiator system at a reaction temperature appropriate to it and with an extremely short mixing time of the liqui...

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Hauptverfasser: SCHUMACHER GERHARD, RUPANER ROBERT, BAUER GERHARD, NAHSTOLL JUERGEN, HUEBINGER WOLFGANG, KIRCHNER WERNER, MEISTER MARTIN, LAWRENZ SVEN, DOBBELAAR JOHANNES, BAECHER REINHARD, MORRISON BRADLEY RONALD, MUESELER FRANZ-JOSEF
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:A process is described for reducing the residual monomer content in a liquid solution, mixture, melt, suspension or dispersion of a polymer by postpolymerization with addition of a redox initiator system at a reaction temperature appropriate to it and with an extremely short mixing time of the liquid system in the production reactor by metering-gradually, in portions or continuously-at least one of the redox initiator components required to initiate polymerization of the residual monomers over a period (metering time) which is from about 10 to 250 times the mixing time of the liquid system in said reactor.