Abstract:Based on the optic requirement of insulation coating used for outside wall in plateau, cold and freezing area, lots of experiments were made for research on the influence of metal paint on insulation coating with low emissivity and solar reflectance. The results indicate that the infrared emissivity of oil insulation coating is digressive evidently with metal paint such as copper, aluminum and nickel. The infrared emissivity of coating is influenced by kinds of metal paint, dosage and shape of metal powder. Copper is the best. The best dosage of these metal paints is about 40%~50%. The effect of sheet copper powder on the decrease of the infrared emissivity for oil insulation coating is better than the spherical powder, and the floating aluminum powder better than the non floating. For water soluble coating, the infrared emissivity is digressive evidently with soluble aluminum powder and the infrared emissivity and solar reflectance decrease, but the powder particle size increases instead. The above insulation coatings are approximate with the optic requirement of insulation coating used for outside wall in plateau, cold and freezing area with infrared emissivity upto 0.35~0.45 and solar reflectance 0.39~0.56.
