Cationic copolymers which are insoluble in water, new dispersions and their use in the coatings of papers

摘要

Cationic copolymers which are insoluble in water based on acrylamide, and a cationic monomer of general formula (I) <IMAGE> (I) in which R and R1, identical or different, represent a hydrogen atom or a methyl group, X represents an oxygen atom or an NH radical and n represents 2 or 3, containing in molar proportions 5 to 30% of cation units and cross-linked with 0.01% to 0.4% in molar proportions relative to the previous monomers of bisacrylamidoacetic acid and with about 0.01% to 0.1% in molar proportions relative to the monomers of bisacrylamidoacetic acid, self-reversible dispersions containing them and use in coating in the paper industry.