HYDROPHILIC DISPERSION POLYMERS FOR PAPER APPLICATIONS

摘要

A papermaking process comprising forming an aqueous cellulosic papermaki ng slurry and adding a hydrophilic dispersion polymer to the slurry to increase retention and/or drainage is disclosed. The hydrophilic dispersion polymer comprises ( a) a cationic monomer and (b) a second monomer represented by (meth)acrylamide (in an aqueous solution of a polyvalent anionic salt), wherein the polymerization is carrie d out in the presence of either an organic high-molecular weight multivalent cation comprising a water-soluble polymer containing at least one (a) monomer and/or poly dially l dimethyl ammonium chloride (DADMAC). After addition of the polymers, the slurry is drained to form a sheet. and the sheet is dried.