METHOD OF PREPARING LOW-VISCOUS WATER-SOLUBLE POLYMERIC AQUEOUS BASE DISPERSIONS

chemical industry. SUBSTANCE: described is method of preparing low-viscous, water-soluble polymeric aqueous base dispersions which comprise polymer A with average molecular weight of at least 5.105 Dalton consisting of a1 99-70 wt % of at least one water-soluble monomer, a2 1-30 wt % of at least one...

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Bibliographische Detailangaben
Hauptverfasser:	JOAKHIM KARL, MANFRED BRAUM, GJUNTER SHMITT, PETER KVIS, PETRA SHLISSMANN
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS DYES GENERAL PROCESSES OF COMPOUNDING IMPREGNATING OR COATING OF PAPER MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING POLISHES PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRODUCTION OF CELLULOSE PULP COMPOSITIONS TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G WORKING-UP
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Beschreibung
Zusammenfassung:	chemical industry. SUBSTANCE: described is method of preparing low-viscous, water-soluble polymeric aqueous base dispersions which comprise polymer A with average molecular weight of at least 5.105 Dalton consisting of a1 99-70 wt % of at least one water-soluble monomer, a2 1-30 wt % of at least one water-repellent monomer. Method comprises in first stage preparing aqueous dispersion PD of polymer A and at least one polyelectrolyte with average molecular weight of less than 5.105 Dalton as polymeric dispersant D, in second stage preparing concentrated aqueous dispersion PD' from aqueous dispersion PD by removing water, and in third stage preparing aqueous dispersion PD' by adding aqueous dispersion of said polymeric dispersant D to concentrated dispersion PD'. Said dispersions are stable during storage and are not inflammable and are useful as flocculant in treating sewage as dehydrating agent after separation of aqueous phase, as retention agent in preparing paper, as soil improving agent or as dispersant. EFFECT: more efficient preparation method. 3 cl, 8 ex