| 摘要 |
<p>The invention provides a water-soluble polymer dispersion liquid, a paper strength agent, a papermaking filter aid and a papermaking retention agent, which may not impair the paper quality and can maintain high filteration rate and enhance paper strength. The water-soluble polymer dispersion liquid, in a saline solution, of which the salt concentration is higher than 10 weight % and lower than a saturation concentration and at the presence of a polymeric dispersant (B), is a dispersion liquid obtained by dispersion polymerization of the free radical polymeric components (a) of at least cationic free radical polymeric monomers (a1), anionic free radical polymeric monomers (a2) and (methyl) acrylamide (a4). In a water diluted dispersion liquid where the total content of the component (A) and the component (B) of the dispersion liquid is 0.2 wt.%, the minimal turbidity of the diluted dispersion liquid ranges from 10NTU to 500NTU, when the pH value is 5-8.</p> |
