. . "The process of the present invention is applicable to the production of any known water-soluble polymers, for instance, water-soluble homopolymers and copolymers obtained from monomers having a polymerizable double bond, e.g. acrylamide or methacrylamide; acrylic or methacrylic acid salts; nitrogen-containing acrylic acid esters such as quaternary salts or salts with acids of N,N-dialkylaminoalkyl" . . .