Dispersions of water-soluble polymers and methods for making and

Details Dispersions of water-soluble polymers and methods for making and Dispersions of water-soluble polymers and methods for making and

1974-05-01

1976-09-07

Welsh, M. J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 296WB, 260 296WQ, 260 296HN, 260 296PM, C08L 3308

Patent

active

039793494

ABSTRACT:
Polymer dispersions in which an aqueous phase comprising a water-soluble polymer is dispersed in an organic liquid in the presence of a polymeric water-in-oil type dispersing agent containing salt-forming basic nitrogen atoms. When the dispersion is mixed with water in the presence of an acid, which acid may be present in the aqueous or organic phase of the dispersion or added separately, the dispersing agent transforms into an oil-in-water type, the previously dispersed polymer dissolves in the water, and the previously continuous organic phase is dispersed in the water.
Methods of making such polymer dispersions.
Methods of forming aqueous solutions of water-soluble polymers by combining such dispersions with water in the presence of an acid.

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patent: 3711435 (1973-01-01), Hammer et al.
patent: 3801524 (1974-04-01), Parker
patent: 3806485 (1974-04-01), Fisque

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