Aqueous dispersion of finely divided polu00ecmero anfu00f3tero, process for preparation of the same, and the use of aqueous dispersions of finely divided anfu00f3tero polu00ecmero

摘要

Aqueous dispersion of finely divided polu00ecmero anfu00f3tero, process for preparation of the same, and the use of aqueous dispersions of finely divided polu00ecmero anfu00f3tero.The invention relates to an aqueous dispersion of polymer anfu00f3tero finely particulate obtained by polymerization in two stages, that is, in the first stage of the polymerization, a pre polymer obtained from a monomer mixture of (a) 15 to 40% by weight of at Least one ester acrylate (MET) and / or a (MET) acrylamide with a free amino group.Protonado and / or quaternized amino, (b) 40 to 70% by weight of at least one estirol optionally replaced, (c) 0 to 25% by weight of acrylonitrile and / or metacrilonitrila, (d) 0.5 to 5% by weight of at least one etilenicamente unsaturated monomer comprising acid groups and (and 0 at. It is 30% by weight of at least one nonionic monomer.Unsaturated etilenicamente is different from (b) and (c) and the sum of (a) + (b) + (c) + (d) + (E) = 100% by weight is prepared by polymerization in solution in a solvent that is partially to completely miscible with water.The solution / dispersion of pre polymer is then added to the water and then subjected to emulsion polymerization in a second stage of polymerization with at least one nonionic unsaturated monomer, etilenicamente. The invention also relates to the production of dispersion by polymerization in two stages and the use of the dispersion of the polymer as a means of wrapping paper, pulp and paper.