PRODUCTION OF LIQUID DISPERSION OF WATER-SOLUBLE CATIONIC POLYMER

摘要

PURPOSE:To produce the titled dispersion having high fluidity and handleability, by dispersing particles of cationic water-soluble polymer in an aqueouss salt solution which is a non-solvent of the polymer, in the presence of a polymer soluble in said salt solution. CONSTITUTION:The objective dispersion can be produced by dispersing (A) particles of a polymer produced by the copolymerization of (a) a cationic monomer of formula I (R1 is H or CH3; R2 and R3 are 1-3C alkyl; A is O or NH; B is 2-4C alkylene or hydroxypropylene; X<-> is anionic counter ion) and (b) other monomer copolymerizable therewith at a molar ratio of 100:0-5:95 in (B) an aqueous salt solution which is a non-solvent of the component A (e.g. aqueous solution of ammonium sulfate) at a concentration of >=10wt%, and adding (C) >=0.1wt% (based on the component B) dispersing agent consisting of a polymer soluble in the component B, preferably a polymer produced by copolymerizing (c) a cationic monomer of formula II (R2 and R3 and 1-2C alkyl; R4 is H or 1-2C alkyl) and (d) acrylamide at a molar ratio of 100:0-20:80.