Aqueous dispersions of water-soluble polymers of N-vinylcarboxamides, their preparation and their use

摘要: Aqueous dispersions of water-soluble polymers N-vinylcarboxamides contain, based on 100 parts water, (A) from 5 to 80 by weight polymer containing N-vinylformamide units and/or N-vinylacetamide and having particle sizes 50 nm 2 μm (B) 1 at least one polymeric dispersant which is incompatible with the in aqueous solution, are prepared polymerizing N-vinylacetamide, if desired together other monoethylenically unsaturated monomers form therewith, polymers, formed (A), 30 95° C. presence 0.001 5.0% weight, used, used as drainage aids, flocculants retention aids wet dry strength agents fixing compositions papermaking.