Dispex AA 4140

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Dispex® AA 4140 is an ideal dispersing agent for a wide range of water-based coatings. It can be used as supplied.  The neutralizing alkali used in conjunction with the acrylic polymer can significantly impact the properties of the final coating. The sodium based Dispex® 4140 often contributes slightly negatively to the dry-film coating properties.  Dispex® AA 4140 is effective over a pH range of 5 – 12 and up to temperatures in excess of 100 °C (212 °F).

Dispex® AA 4140 is based on an organic polymer and provides improved storage stability of both pigment dispersion and formulated paint when compared with inorganic dispersing agents, e.g., polyphosphate products. There is little or no adverse reaction to high temperatures or pH changes as indicated in the graphs below (examples showing the accelerated effects).

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