| 摘要 |
The process of the present invention produces an aqueous dispersion of miner al materials, suitable for use in pigments and other coatings, by introducing a fully neutralized dispersing agent to an aqueous dispersion of coarse mineral materials, grinding the aqueous dispersion and, during grinding, adding a partially neutralized dispersing agent to the aqueous dispersion. The process of the present invention produces aqueous dispersions of very fine particles, having a solids content of at least 75% by weight, based on the total weight of the aqueous dispersion, an d wherein 95% or more of the particles are below 2 microns. |
