Characterization of Vegetable Resin-Based Coatings for Application as Cool Roof Paint

Certain water-insoluble compounds used in coating systems are solubilized in water-based polymeric resins. However, many of them are toxic. This study focused on the physicochemical characterization of coatings based on the climate-resilient plant emulsion of Acrocomia aculeata, used as a dispersant of insoluble compounds for application in cool roof coatings extensible on metal surface. Optical, physical, chemical, and spectroscopic characterization techniques were employed. As a result, measurements of the density, viscosity, pH, and ionic conductivity of two formulations NR1 and NR1BF4 that achieved the dispersion of calcium carbonate were obtained, whose spectroscopic and optical properties were characterized by X-ray diffraction, scanning electron microscopy coupled to energy-dispersive spectroscopy, X-ray, infrared spectroscopy. Thermal analysis shows that the A. aculeata resin used as an aqueous emulsion binder for the formulations has the characteristics of a simple polymer due to the almost simultaneous endotherms and exotherms, and its application achieves coatings that reduce the toxic characteristics of synthetic binders while maintaining the particle size. Crystalline coatings were obtained by analyzing them by XRD.