PAPER-SIZING AGENTS CONTAINING AQUEOUS, SOLVENT-FREE DISPERSIONS OF CATIONIC POLYMERS AND METHOD OF PREPARING SIZED PAPER BY USING THESE AGENTS

摘要

The invention concerns agents for the mass and/or surface sizing of paper, said agents containing aqueous, solvent-free dispersions of cationic polymers. The invention also concerns a method of sizing paper by using these agents. The sizing agents according to the invention, which can be used for both mass and surface sizing, contain as active substance copolymers of: a) 30 to 70 mol % of a monomer I, with b) 70 to 30 mol % of a monomer II and optionally c) 0 to 20 mol % of C8 to C30 monoolefins, and d) 0 to 10 mol % of further monomers which can be copolymerized with a), b) and optionally c), the total amount of monomers a), b), c) and d) being 100 mol %.