Non-aqueous dispersions of water-soluble polymers and...

C - Chemistry – Metallurgy – 08 – L

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400/7012, 400/70

C08L 57/00 (2006.01) C08J 3/09 (2006.01) D21H 17/34 (2006.01)

Patent

CA 1058788

ABSTRACT OF THE DISCLOSURE Stable non-aqueous dispersion of water-soluble polymers of extremely high molecular weight coupled with relatively low viscosity and rapid dilutability with water to form a polymer solution are obtained by polymerization of at least one water-soluble .alpha.,.beta.-monoolefinically unsaturated monomer such as acrylamide and dimethyl aminoethyl methacrylate in water-in-oil emulsion with the aid of at least one photo- initiator and UV-light, and azeotropical distillation from water, before or after the addition of a water-soluble wetting agent, to a residual water content of less than 5% by weight, based on polymer. The dispersions are eminently suitable for the preparation of aqueous solution, as retention agents for fillers and water-removal accelerators in the production of paper.

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