Basf Aktiengesellschaft

Basf Se Corporation

Werner Gauweiler

Hubert Meixner

Volker Braig

Anton Negele

Stefan Becker

Hermann Seyffer

Norbert Mahr

Marc Leduc

Pulakesh Mukherjee

Martin Ruebenacker

Peter Claassen

Ilshat Gubaydullin

Robert Feuerhake

Roland Nowack

Martin Rübenacker

Christina Niedberg

Volker Schädler

Aqueous dispersions of water-soluble and/or water-swellable anionic polymers which are obtainable by free radical polymerization of ethylenically unsaturated, anionic monomers in an aqueous medium in the presence of at leas one stabilizer, the polymerization being carried out in the presence of at least one water-soluble polymer of the groups consisting of

Aqueous dispersions of water-soluble and/or water-swellable anionic polymers, method for their production and use thereof

The invention relates to aqueous dispersions of water-soluble polymers of N-vinyl-carboxamides, which are substantially salt-free and comprise anionic polymeric stabilizers having a comb-like molecular structure, processes for the preparation of the dispersions in the presence of anionic polymeric stabilizers having a comb-like molecular structure and the use of the dispersions as retention aids or fixing agents in papermaking.

Aqueous dispersions of water-soluble polymers with comblike stabilizers

An aqueous dispersion of water-soluble polymers obtained by free radical polymerization of ethylenically unsaturated anionic monomers in an aqueous medium in the presence of a stabilizer, wherein the stabilizer comprises: (a) at least one water-soluble polymer selected from the group consisting of a graft polymer of vinyl acetate and/or vinyl propionate on polyethylene glycol, a polyethylene glycol blocked at one or both terminal groups with an alkyl, a carboxyl or an amino group, and a copolymer of alkyl polyalkylene glycol methacrylate and methacrylic acid; and (b) at least one water-soluble polymer selected from the group consisting of a hydrolyzed copolymer of vinyl alkyl ether and maleic anhydride in the form of free carboxyl groups or in the form of salts at least partially neutralized with one or more alkali metal hydroxides or one or more ammonium bases, a cationically modified potato starch, an anionically modified potato starch, a degraded potato starch and maltodextrin.

Aqueous dispersions of hydrosoluble polymerisates of ethylenically unsaturated anionic monomers, method for the production and use thereof

Aqueous dispersions of water-soluble polymers of N-vinylcarboxamides contain, based on 100 parts of water,

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

Aqueous dispersions of water-soluble polymers of N-vinyl carboxylic acid amides, method for the production and use thereof

Growing community of inventors

Lustadt, Germany

Werner Gauweiler