| abstract |
The process of the present invention produces an aqueous dispersion of mineral materials, suitable for use in pigments and other coatings, by introducing a fully neutralized dispersing agent to an aqueous dispersion of thick mineral materials, crushing the aqueous dispersion and, during crushing, add a partially neutralized dispersing agent to the aqueous dispersion. The process of the present invention produces very fine aqueous dispersions of particles, having a solids content of at least 75% of the weight, based on the total weight of the aqueous dispersion, and where 95% or more of the particles They are below 2 microns. |