Flocculating agent comprising water-in-oil emulsion of...

Details Flocculating agent comprising water-in-oil emulsion of... Flocculating agent comprising water-in-oil emulsion of...

C - Chemistry, Metallurgy

08

L

400/9319

C08L 33/26 (2006.01) C02F 1/54 (2006.01) C08G 8/28 (2006.01) D21H 17/45 (2006.01)

Patent

CA 1077637

FLOCCULATING AGENT COMPRISING WATER-IN-OIL EMULSION OF H-ACTIVE POLYMER CARRYING FORMALDEHYDE AND AMINE RADICALS Abstract A flocculation, sedimentation, dehydration or retention composition comprising a dispersion of about 10 to 50% concentration by weight of a polymeric Mannich base in a mixture of water and a water- insoluble liquid, the Mannich base comprising an H-active polymer carrying radicals of a reaction with formaldehyde and a primary of secondary alkyl- or hydroxyalkylamiline wherein the alkyl groups have up to about 18 carbon atoms. The amine is preferably dimethylamine or diethylamine and is used in approximately the same molar amount as the formaldehyde. The polymer preferably comprises acrylamide units and the poly- merization may be effected either before or after reaction with the formaldehyde and amine.

203856

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