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6609471 
Journal Article 
Preparation and properties of brown heat-reflective insulation coatings for exterior wall 
Yang, G; Deng, At 
2017 
36 
22 
1178-1182 
INSPEC:18154778 
A brown heat-reflective insulation coating for exterior wall was prepared from styrene-acrylic emulsion and the mixture of compound titanium red, cobalt blue and titanium chrome yellow based on trichromatic theory, and compared with those prepared using iron oxide brown and iron zinc chrome brown as pigment individually. The properties of the coatings were characterized by ultraviolet/visible/near infrared spectrophotometer, infrared radiometer and precision colorimeter, and their insulation performance was tested by a home-made device. The three brown coatings have similar appearance and low luminosity. Their reflectance, hemispherical emittance and the variation of reflectance after accelerated weathering test all meet the requirement of the standard of JG/T 235-2014 Architectural Reflective Thermal Insulation Coating. There is little difference in adhesion strength, pencil hardness, impact strength and flexibility of the three coatings, and no abnormity after immersing in water for 72 h. The coating prepared with mixed pigments has an optimal total solar reflectance and heatinsulating performance, with a equilibrium temperature 12.3 degC lower than that of the blank panel, but its raw materials are most expensive. Although the coating prepared with iron oxide brown has a lowest cost, its comprehensive performance is the worst.