AN IMPROVED METHOD FOR PREPARING ABS TYPE RESIN

AN IMPROVED METHOD FOR PREPARING ABS TYPE RESIN

This invention relates to an improved process for preparing ABS resins wherein an alkadiene rubber is grafted in aqueous emulsion with styrene and nitrile type monomers, forming a grafted rubber, extracting said grafted rubber into a monomer phase and separating said monomer-grafted rubber phase fro...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: KRUSE, ROBERT LOUIS
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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:This invention relates to an improved process for preparing ABS resins wherein an alkadiene rubber is grafted in aqueous emulsion with styrene and nitrile type monomers, forming a grafted rubber, extracting said grafted rubber into a monomer phase and separating said monomer-grafted rubber phase from said aqueous phase followed by mass polymerizing said grafted rubber-monomer phase to form an ABS polyblend, wherein the improvement comprises, carrying out the mass polymerization of said monomers in the presence of sufficient carbon dioxide to provide an ABS resin having a substantially white color.