Process for preparing stable emulsions of polyelectrolytes of high molecular weight as reverse emulsion
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United States of America Patent
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May 12, 1998
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N/A
app pub date -
Dec 1, 1995
filing date -
Jan 10, 1995
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Abstract
A process for preparing stable emulsions of polyelectrolytes of high molecular weight as reverse emulsion, in which: the monomers are dissolved in an aqueous phase, an organic phase containing a surface-active agent is prepared, these two phases are mixed to obtain an emulsion of the water-in-oil (W/O) type, the monomers are polymerized, the emulsion is incorporated to obtain a water-in-oil (W/O) emulsion, so as to make the polyacrylamide obtained water-soluble, which consists in adding to the aqueous phase a soluble polymer of low molecular weight, of the same general chemical nature and of the same ionic nature as the polyelectrolyte of high molecular weight which is envisaged. Envisaged application: preparation of polyacrylamide for flocculation and/or thickening applications (urban and industrial water treatments, papermaking).
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