PROCESS FOR THE MANUFACTURE OF WATER SOLUBLE COPOLYMERS AND THEIR USE AS SIZING AGENTS

Process for the preparation of aqueous solutions of hydrolysed styrene/acrylonitrile copolymers, the carboxyl groups of which are entirely or partly present as NH4 and/or alkali metal salt, characterized in that (a) 40-90% by weight of acrylonitrile, (b) 10-60% by weight of styrene and 0-20% by weig...

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Bibliographische Detailangaben
Hauptverfasser:	KARSTENS, WERNER, REINHARDT, EUGEN, HOPPE, LUTZ, HUHN, HELMUT
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR LAUNDERING MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP TREATMENT OF TEXTILES OR THE LIKE TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS
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Beschreibung
Zusammenfassung:	Process for the preparation of aqueous solutions of hydrolysed styrene/acrylonitrile copolymers, the carboxyl groups of which are entirely or partly present as NH4 and/or alkali metal salt, characterized in that (a) 40-90% by weight of acrylonitrile, (b) 10-60% by weight of styrene and 0-20% by weight of further monomer which can be hydrolysed by alkali are subjected to suspension or emulsion polymerization, the aqueous dispersion or emulsion is subsequently hydrolysed at 90 DEG -220 DEG C. in the presence of alkali metals and/or alkaline earth metals, and, if appropriate, the copolymer solution is treated with hydrogen peroxide wherein a part of the styrene may be replaced by a further monomer which cannot be hydrolysed by alkali.