| 摘要 |
The invention provides a water-soluble polymer dispersion liquid with excellent preservation stability, a paper strength agent stabling paper quality and enhancing paper strength, a papermaking filter aid and a papermaking retention agent. The dispersion liquid disperses a water-soluble polymer (A) into particles with average diameters of 0.1-100 micrometers in a saline solution of which the salt concentration is higher than 10 weight % and lower than a saturation concentration by using a polymeric dispersant (B), wherein the content of the water-soluble polymer (A) is 10-40 weight %, and the viscosity of the dispersion liquid is 3,000-20,000 mPa.s. The polymeric dispersant (B) contains 10-99.979 mol% of cationic free radical polymeric monomers (b1), 0.01-1mol% of monomers with (methyl) allyl (b2), 0.001-0.1 mol% of crosslinking monomers (b3) and 0.01-1 mol% of N-substituted (methyl) acrylamides (b4) represented by the formula CH2=C(R1)-CONR2(R2) (wherein, R1 represents hydrogen atoms or methyl; R2 independently represents straight or branched alkyl having 1-4 carbon atoms. |
