Dispersion and/or grinding aid agents of kaolin in aqueous suspension, aqueous suspensions obtained and uses thereof

摘要

The present invention relates to a ternary mixture consisting of at least one homopolymer or copolymer of (meth)acrylic acid, partially or completely neutralized with sodium, with potassium, with lithium and/or with an amine, at least one solution of silicate or metasilicate chosen from the group consisting of a sodium silicate of formula Na₂O.nSiO₂ (with n varying between 1 and 4), sodium metasilicate Na₂SiO₃, a potassium silicate K₂O.nSiO₂ (with n varying between 1 and 4), potassium metasilicate K₂SiO₃ and a mixture of these compounds, and at least one base, as dispersion and/or grinding aid agents of kaolin in aqueous suspension.