Patent ID: 7220339
Filing Date: 2007-05-22
Classification: C08F

Abstract:
1. A process for the production of paper from an aqueous suspension containing cellulosic fibres, and optional fillers, which comprises: adding to the suspension an aqueous polymer dispersion comprising: (a) a dispersed polymer, and, (b) a dispersant polymer which is a co-polymer of a monomer mixture (M) comprising at least one cationic vinyl monomer (m wherein R 1 is hydrogen or methyl, R 2 is hydrogen or C 1 -C 2 alkyl, R 3 is hydrogen, C 1 -C 4 alkyl, phenyl, or benzyl, n=1 to 4, and x=1 to 50, and, (c) a salt, the monomer mixture (M) including 0.5 wt % or less of monomers which are not soluble in water, and, forming and draining the suspension on a wire.