| 摘要 |
A process for the preparation of dispersions of water-soluble polymers, which comprises polymerizing a water-soluble monomer having a double bond under stirring in an aqueous salt solution in which the monomer is soluble but the polymer formed from the monomer is insoluble in the presence of a dispersant comprising a polyelectrolyte soluble in the aqueous salt solution to form fine polymer particles dispersed in the aqueous salt solution, characterized by adding at least one thickening inhibitor selected from among (A) polycarboxylic acids and salts thereof, (B) polyhydric phenols, (C) cyclic hydroxy carboxylic acids and salts thereof, (D) gluconic acid and salts thereof, (E) products obtained by reacting methoxyhydroquinone and/or a (meth)acrylic cationic monomer with a compound generating free radicals in an oxidizing atmosphere, (F) products obtained by reacting a (meth)acrylic cationic polymer with a compound generating free radicals in an oxidizing atmosphere, (G) products obtained by reacting a (meth)acrylic cationic polymer with an oxidizing agent, and mixtures of two or more of them.
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