Coagulation of polymers using sulfurous acid

Methods for coagulating a graft polymer latex comprise contacting the latex with sulfurous acid. The methods are particularly suitable for ABS resins and provide products having improved thermal oxidative stability and color stability. When coagulation is effected in the presence of a radical initia...

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Bibliographische Detailangaben
Hauptverfasser:	WOZNY, JOHN C
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:	Methods for coagulating a graft polymer latex comprise contacting the latex with sulfurous acid. The methods are particularly suitable for ABS resins and provide products having improved thermal oxidative stability and color stability. When coagulation is effected in the presence of a radical initiator, the residual grafting monomer concentration in the resin product is reduced.