Patent ID: 8647470
Filing Date: 2014-02-11
Classification: D21H

Abstract:
1. A process for the production of paper, board, and cardboard having high dry strength, the process comprising: (I) metering into a paper stock an aqueous composition comprising a nanocellulose comprising cellulose fibers and at least one anionic polymer and optionally a water-soluble cationic polymer; (II) draining the paper stock, to obtain paper product; and (III) drying the paper product; wherein the anionic polymer comprises, as polymerized units: (a) at least one monomer selected from the group consisting of a C (b) at least one anionic monomer selected from the group consisting of an ethylenically unsaturated C (c) optionally, at least one monomer selected from the group consisting of a C (d) optionally, a monomer comprising at least two ethylenically unsaturated double bonds in the molecule.