PRODUCTION OF ANIONIC WATER-SOLUBLE POLYMER DISPERSION, ANIONIC WATER-SOLUBLE POLYMER DISPERSION, AND ITS USE

摘要

PROBLEM TO BE SOLVED: To obtain a polymer dispersion having a low viscosity, a good workability, and an excellent storage stability by polymerizing a monomer component contg. (meth)acrylic acid in an aq. salt soln. in the presence of a cationic water-soluble polymer. ;SOLUTION: The monomer component contg. (meth)acrylic acid comprises 15-100mol% acrylic acid and 0-85mol% acrylamide. The cationic water-soluble polymer is, e.g. a dimethyldiallylammonium chloride (co)polymer. The wt. ratio of the monomer component to the cationic water-soluble polymer is (100:1)-(10:1). A chloride, sulfate, or nitrate of an alkali metal (e.g. Na or K) or ammonium is used as the salt for forming the aq. salt soln. The concn. of the salt is from 5wt.% to the saturation concn. In a papermaking process, the aq. soln. is mixed into a paper material and then a water-diluted polymer dispersion is added to the material.;COPYRIGHT: (C)1998,JPO