Disperse for paper chemicals, paper strength enhancer containing the dispersion for paper chemicals, drainage improver and yield improver

摘要

PROBLEM TO BE SOLVED: To provide a dispersion liquid for paper manufacturing chemicals, which does not generate agglomerates during polymerization and has excellent paper strength effect, drainage effect and yield effect. SOLUTION: The dispersion liquid for papermaking chemicals containing a (meth) acrylamide polymer (A) contains at least two kinds of inorganic salts (B), and the component (B) is inorganic ammonium. It contains two or more kinds selected from the group consisting of a salt, an inorganic sodium salt and an inorganic potassium salt, and has an extensional viscosity of 40 to 200 mm when the dispersion liquid is made into a 0.5 wt% aqueous solution with a solid content concentration of the component (A). A dispersion for papermaking chemicals, wherein the intrinsic viscosity (temperature 25 ° C.) of the dispersion obtained by diluting the dispersion with a 1N NaCl aqueous solution is 10 to 30 dl / g. [Selection diagram] None