Impact of Starch Addition on Properties of Urea Formaldehyde/Starch Copolymer Blends for Application as a Binder in the Coating Industry

In order to formulate a paint binder for emulsion paint formulation, Urea formaldehyde resin was reactively blended with various concentrations (10-70 percent) of cassava starch. Some physical properties and the emission of formaldehyde from the blended resin have been investigated. Initially, viscosity decreased before a gradual increase was noted with an increase in the concentration of starch. With cassava starch content in the blend, refractive index and elongation at break increased initially but gradually decreased. As the inclusion of starch increased, gel time, density, melting point, moisture absorption and formaldehyde emission decreased. The interaction between the two separate polymers indicates that the optimum loading inclusion was 50 percent starch. The benefits of this new device include low brittleness, low emission of formaldehyde and water reduction characteristics. Therefore, it is possible to suggest a polymer blend as a binder for the coating industry. These findings present the modified methylol urea of cassava starch as a resin with relatively very low moisture uptake and formaldehyde emission against the conventional hard and brittle resin. The increase in elongation at break and decrease in density is also a good value to the coating industry. This work has therefore shown that biodegradable starch films could be used, in particular in the formulation of emulsion paints, to manufacture copolymer composite binders for the coating industry.

Author(s) Details

B. J. Dimas
Department of Science Education, Taraba State University, Jalingo, Nigeria.

Prof. S. A. Osemeahon
Department of Chemistry, Modibbo Adama University of Technology, Yola, Nigeria.

F. G. Fadawa
Department of Chemistry, Modibbo Adama University of Technology, Yola, Nigeria.

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