Hydrophilic dispersion polymers for paper applications

Details Hydrophilic dispersion polymers for paper applications Hydrophilic dispersion polymers for paper applications

D - Textiles, Paper

21

H

D21H 23/04 (2006.01) D21H 17/45 (2006.01) D21H 21/10 (2006.01) D21H 17/29 (2006.01) D21H 17/37 (2006.01) D21H 17/66 (2006.01)

Patent

CA 2216242

A papermaking process comprising forming an aqueous cellulosic papermaking 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 carried 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 diallyl dimethyl ammonium chloride (DADMAC). After addition of the polymers, the slurry is drained to form a sheet. and the sheet is dried.

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