Method of maintaining flowability of acrylic polymer dispersion
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United States of America Patent
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Sep 3, 1991
Grant Date -
N/A
app pub date -
Dec 12, 1989
filing date -
Dec 12, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to a method of maintaining the flowability of a dispersion of fine particles of a water-soluble polymer mainly comprising acrylic acid and/or acrylamide in an aqueous salt solution for a long period of time. In order to attain the above-described object, the present invention is characterized by adding to a polymer dispersion 0.05 to 1% by weight, based on the dispersion, of a nonionic surfactant and 2 to 10% by weight, based on the dispersion, of an oleaginous liquid. The aqueous salt solution for dispersing the polymer particles is most preferably an aqueous solution of a salt wherein the counter ion is a monovalent cation, and the salt concentration of the aqueous solution is preferably at least 15% by weight. The acrylic water-soluble polymer dispersion is used for applications such as high-molecular flocculants, sizing agents, or paper-strength agents.
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