| 摘要 |
PROBLEM TO BE SOLVED: To provide a process to purify and classify a dispersion containing stabilized particles having counterions and ions as well as free species. SOLUTION: The solution may comprise an aqueous medium, a solvent medium, or a combination of both and can include at least one type of aqueous and/or solvent solutions. The process includes at least the steps, in any order, of substantially removing the particles having sizes above about 1μm, preferably above 0.5μm, substantially removing the free species, and exchanging at least a portion of the counterions that are a part of the stabilized particles. The process disclosed is especially useful in purifying dispersions where the ionic stabilized colloidal particles are carbon black. Wherein the carbon black has attached organic groups comprising at least one ionic group, or at least one ionizable group, or mixtures thereof. COPYRIGHT: (C)2009,JPO&INPIT |
