METHOD FOR THE PRODUCTION OF A LOW-VISCOSITY, WATER-SOLUBLE POLYMERIC DISPERSION

摘要

An aqueous, low-viscosity, water-soluble polymeric dispersion containing a polymer (A) is prepared by copolymerizing monomers: (a1) 99 to 70 weight % of at least one water-soluble monomer, (a2) 1 to 30 weight % of at least one hydrophobic monomer and, (a3) 0 to 20 weight % of at least one amphiphilic monomer, which monomers constitute 100 weight % of the polymers forming material which polymer (A) has an average molecular weight M w (mean weight) of at least 5.times.10 5 Dalton, said process comprising: a first step i) of reacting said monomer ingredients in an aqueous dispersion in the presence of at least one polymeric dispersing agent (D) thereby preparing a dispersion of polymer (A); and a second step ii) of adding at least one polymeric dispersion agent (D), in an aqueous solution, to the dispersion.