Process for production of water-soluble polymer dispersion

A process for the production of a water-soluble polymer dispersion which is characterized by polymerizing water-soluble monomers of 5 to 100 mole % of a cationic monomer represented by the following formula (I), 0 to 50 mole % of another cationic monomer represented by the following formula (II) and 0 to 95 mole % of (meth)acrylamide in the presence of 1 to 10% by weight of an organic high-molecular multivalent cation comprising a water soluble polymer containing at least a monomer of formula (II) based on the total weight of the monomers in a multivalent anionic salt aqueous solution having a concentration of 15% by weight or more:

• ##STR3## wherein R.sub.1 is H or CH.sub.3 ;
• each of R.sub.2 and R.sub.3 is an alkyl group having 1 to 3 carbon atoms;
• A is an oxygen atom or NH;
• B is an alkylene group having 2 to 4 carbon atoms or a hydroxypropylene group;
• and X.sup.- is an anionic counterion, ##STR4## wherein R.sub.4 is H or CH.sub.3 ;
• each of R.sub.5 and R.sub.6 is an alkyl group having 1 or 2 carbon atoms;
• R.sub.7 is H or an alkyl group having 1 or 2 carbon atoms;
• A' is an oxygen atom or NH;
• B' is an alkylene group having 2 to 4 carbon atoms or a hydroxypropylene group;
• and X.sup.- is an anionic counterion.