A dispersant to the calcium carbonate, a base of the copolymer of acrylic acid and maleic acid,

摘要

P the invention is to provide a dispersant effective for the calcium carbonate. / p & & p & is introduced into an aqueous dispersion of particles of calcium carbonate of a dispersing agent which is a salt of the copolymer of acrylic acid and maleic acid, in which the ratio of the monomers is between 100 / 5 and 100 / 200, the molecular mass of the polymer being of 2 000 to 20 000, and the salt used is an alkali metal or ammonium salt, the effective proportion of the copolymer is about 1 to 5% relative to the weight of caco3. / p & & p & this dispersion is used for coating paper, and gives it excellent characteristics. / p