Stabilization of Titanium Dioxide in Non-Aqueous and Aqueous Coatings
Organic surface treatments (trimethylolpropane, neopentyl glycol, various surfactants, silicones) are often utilized to improve the dispersibility of TiO2 in organic or aqueous media. These organic treatments alone, in most cases, do not provide sufficient stabilization for proper deflocculation of the pigment and, therefore, paint producers must use additional additives in order to achieve the maximum level of pigment stabilization.
This data, and very similar data from a large number of other experiments, indicates that the optimal additive level is typically around 2% active substance, calculated on the TiO2 pigment. The proper amount of additive depends on the following factors: