DefinePK

Abstract

Alternative thickeners to an industrial thickener (natrosol) in the production of emulsion paints were investigated. Four starch grades; native starch, native starch modified with sodium acetate, native starch modified with sodium acetate plus fumaric acid and native starch modified with sodium acid mixed with adipic acid were tested as possible alternatives to natrosol. The physio-chemical properties such as viscosity, density, pH, drying time and durability of the paints produced with these starches as thickeners were compared with paint produced with the industrial thickener (natrosol). There were improvements in these properties in paints produced from the modified starches compared with paint produced from the native starch. The paint produced with native starch modified with sodium acetate and furmaric acid had properties closest to the paint produced with the industrial thickener. The viscosity, density, pH and drying time of the paint produced with sodium acetate and furmaric acid are 61cp, 1.53g/cm3, 8.43 and 26mins compare to 60cp, 1,54g/cm3, 8.5 and 25mins for paint produced with the industrial thickener. All paints produced with alternative thickeners deteriorated in properties with time (when observed after three weeks of storage).