POLYURETHANE-BASED COATINGS WITH HIGH SOLAR REFLECTANCE INDEX
摘要:
The present disclosure relates generally to polyurethane-based coatings with high solar reflectivity, for example, for use as a coating on a building surfaces. In one aspect the disclosure provides a solar reflective coating that comprises a functionalized anionic polyurethane present in an amount in the range of 20-80 wt% of the composition on a dry solids basis; a water-insoluble transition metal crosslinking agent present in an amount in the range of 0.5-30 wt% of the composition on a dry solids basis; and at least one of: a hydrophobic acrylic polymer present in an amount in the range of 20 wt% to 80 wt% on a dry solids basis, and a near-infrared reflective colored pigment present in an amount of at least 0.1 wt%, e.g., in the range of 0.2 wt% to 10 wt% on a dry solids basis.
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