PROCESS FOR THE REDUCTION OF THE MOLECULAR WEIGTH OF WATER SOLUBLE POLYACRYLIC ACID OR ITS DERIVATIVES

PROCESS FOR THE REDUCTION OF THE MOLECULAR WEIGTH OF WATER SOLUBLE POLYACRYLIC ACID OR ITS DERIVATIVES

1. A process for reducing the molecular weight of water-soluble polyacrylic acid or salts thereof except for poly alpha-hydroxyacrylic acid salts, polyacrylamide or polyacrylonitrile hydrolyzates, characterized in that an aqueous polymer solution having a pH value of 4 to 9 is treated with 0.01 to 2...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: KARSTENS, WERNER, HUHN, HELMUT
Format: Patent
Sprache:eng ; ger
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:1. A process for reducing the molecular weight of water-soluble polyacrylic acid or salts thereof except for poly alpha-hydroxyacrylic acid salts, polyacrylamide or polyacrylonitrile hydrolyzates, characterized in that an aqueous polymer solution having a pH value of 4 to 9 is treated with 0.01 to 20% by weight, based on the polymer, of hydrogen peroxide at 20 to 100 degrees C.