Waterborne materials and coatings have different properties compared to conventional solventborne systems. One of these differences is the high temperature required for water evaporation, which leads to slower drying process in these systems than solvent-containing systems, and the high surface tension of water due to the polarity of these molecules. This high surface tension can lead to superficial imperfections and inadequate adhesion of the waterbase coatings applied on the substrate. Therefore, the use of surface trapping agents in these systems is essential. Compared with solventbase coatings in which polymeric thinners and dispersants are used, polyacrylic salts and alkyphenol ethoxylates are used in water based systems.
Polyfam 101 as dispersing agent, is a sodium salt of carboxylate polyacrylate and a high performance solution for dispersion of mineral pigments such as titanium dioxide and filler types in waterbase systems which produces very little foam during operation. This dispersing agent has unique properties and stability in systems containing active pigments such as zinc oxide or lead silicate. Polyfam 101 has a wide range of pH, but along with acrylic emulsion resins, it exhibits the best performance in alkaline range of 9 to 10. Unlike polyphosphates, this dispersing agent does not hydrolyze at high temperatures.
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