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Due to the heightened awareness on global warming and ever rising energy costs, there is a need to extend solar reflective technologies beyond roofs and pavements to other surfaces such as exterior walls. The initial focus of this study is to understand and quantify the heat reflective performance of conventional exterior architectural coatings and optimizing such formulations for solar reflectance, without the use of specialty heat reflective materials. The optimized formulations are then used to quantify the enhancement of solar reflectance when formulated with commercial materials such as hollow-spherical inorganic and organic particulate fillers that are designed for this this purpose. In addition to solar reflectance, other key properties of the coatings, both at wet state and as dry films, are monitored. This will enable formulators to select solar reflective materials that will allow retention of important coating properties while providing the benefit of solar reflectance.
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