Method of maintaining flowability of acrylic polymer dispersion

Details Method of maintaining flowability of acrylic polymer dispersion Method of maintaining flowability of acrylic polymer dispersion

C - Chemistry, Metallurgy

08

J

400/9039, 400/92

C08J 3/09 (2006.01) C08J 3/03 (2006.01) C08L 33/02 (2006.01) C08L 33/26 (2006.01)

Patent

CA 1338094

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.

607171

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