Dispex A40 Ammonium salt of an acrylic polymer Ciba Colloidal stabilizers / Dispersing agents ADHESIVE >> Water-based DISPEX A40 is derivative of a family of highly effective, low viscosity dispersing agents for water-borne coating systems. The product is especially suited for the dispersion of inorganic pigments. DISPEX A40 is a solution of an ammonium salt of an acrylic polymer in water. DISPEX A40 preparation is ideal dispersing agents for a wide range of water-borne coatings. DISPEX A40 can be used as supplied. The neutralising alkali used in conjunction with the acrylic polymer can significantly impact the properties of the final coating. DISPEX A40 releases ammonia during the drying process and therefore has little impact on water and alkaline resistance of the dry film. Use of DISPEX A40 should be limited to pH 5-10.5 and temperatures lower than 70°C due to potential loss of volatile ammonia. Compared with inorganic dispersing agents, e.g. polyphosphate products, the organic polymer based DISPEX A40 provides improved storage stability of both, the pigment dispersion and the formulated paint. There is little or no adverse reaction to high temperatures or pH changes as indicated in the graphs below, which are examples showing the accelerated effects. Solution of an ammonium salt of an acrylic polymer in water. Used as a highly effective, low viscosity dispersing agent for water-borne systems. Possesses little impact on water and alkaline resistance of the dry film. Provides improved storage stability of both, the pigment dispersion and the formulated adhesive, and little or no adverse reaction to high temperatures or pH changes.