Method for the stabilization of polyvinylpyrrolidones
Method for stabilizing polyvinylpyrrolidones, which comprises treating the polyvinylpyrrolidones with sulfur dioxide, sulfurous acid or alkali metal sulfites and then with free-radical scavenger, and converting the solutions treated in this way into the powdered polyvinylpyrrolidones by drying.
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| creator | FUSSNEGGER BERNHARD KROLL MANFRED STRUBE KARL-HERMANN HOEFER FRANK KOLTER KARL GARCIA CASTRO IVETTE PINNEKER OLGA SCHMIDT PETER WIDMAIER RALF ASCHERL HERMANN |
| description | Method for stabilizing polyvinylpyrrolidones, which comprises treating the polyvinylpyrrolidones with sulfur dioxide, sulfurous acid or alkali metal sulfites and then with free-radical scavenger, and converting the solutions treated in this way into the powdered polyvinylpyrrolidones by drying. |
| format | Patent |
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| subjects | CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS |
| title | Method for the stabilization of polyvinylpyrrolidones |
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