Stabilization of raw porcelain gres suspensions with sodium naphthalene sulfonate formaldehyde condensates

The stabilization of raw porcelain gres suspensions with sodium naphthalene sulfonate formaldehyde condensates (SNSFC) was examined systematically in order to understand the basis mechanism of dispersion. Small additions of SNSF to the classical deflocculating mixture with sodium silicate were tested. The repulsion between the colloidal particles was correlated with the adsorption isotherm and zeta potential. The naphthalene sulfonate condensates were effective as dispersant for raw porcelain gres suspensions. The efficiency of these dispersant was attributed to electrostatic effect between the colloidal particles. The ability of the SNSFC to stabilise stabilize raw porcelain gres suspensions was not affected by the degree of condensation.