JPS6221801B

A continuous process for producing a vinyl acetate-ethylene copolymer emulsion comprises continously charging a reaction mixture containing inter alia vinyl acetate and ethylene into an initial polymerization zone, conducting an initial polymerization of the vinyl acetate and ethylene in the presenc...

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Bibliographische Detailangaben
Hauptverfasser:	UIRIAMU EDOWAADO RENII, UIREI EDOGAA DANIERUSU
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 continuous process for producing a vinyl acetate-ethylene copolymer emulsion comprises continously charging a reaction mixture containing inter alia vinyl acetate and ethylene into an initial polymerization zone, conducting an initial polymerization of the vinyl acetate and ethylene in the presence of a seed latex under ethylene pressure, continuously removing the thus formed emulsion from the initial polymerization zone at an unreacted vinyl acetate monomer content of from 5 to 20% by weight of the emulsion and a glass transition temperature of from minus 20 DEG C to plus 10 DEG C and then effecting a post polymerization of the unreacted vinyl acetate at an ethylene pressure of not more than 300 psia until the unreacted vinyl acetate in the emulsion is less than 1% by weight.