Preparation of concentrated, stable water-in-oil emulsions...

Details Preparation of concentrated, stable water-in-oil emulsions... Preparation of concentrated, stable water-in-oil emulsions...

C - Chemistry, Metallurgy

08

F

134/45, 400/9001

C08F 6/20 (2006.01) B01D 3/36 (2006.01) C08F 2/22 (2006.01) C08J 3/09 (2006.01)

Patent

CA 1262394

ABSTRACT OF THE DISCLOSURE: Concentrated, stable water-in-oil emulsions of water-soluble or water-swellable polymers are prepared by polymerization of one or more water-soluble ethylenically unsaturated monomers in a water-in-oil emulsion and removal of water from the water-in-oil polymer emulsion by azeotropic distillation, by a method in which superheated vapor of an inert organic solvent which is immiscible with water is passed into the water-in-oil polymer emulsion. Using the process, it is also possible to concentrate emulsions which tend to coagulate or water-in-oil emulsions which are sensitive to shearing, without the polymers losing their effectiveness.

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