Abstract

The interactions between pigments, solvents, and additives play a decisive part in the formulation of paints and coatings. These interactions were examined by means of calorimetric measurements of the enthalpies of displacement and by determining the adsorbed additive amounts of pigments from non-polar solvents. The combination of the two method proved particularly favorable for examining the type of interaction between additive and pigment. In most cases the polar groups of both components were decisive for the adsorption of additives on the pigment surfaces from non-polar solvents. The differential enthalpy of displacement gives hints in regard to the type of bond between the additive and the pigment. The behavior in multicomponent systems can be appraised in this way. The adsorption and stability tests on the pigment dispersions are shown to correlate.

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