Abstract
Based on the requirement of reducing energy supplies and relieving urban heat island mitigation, influence of six different types of metal oxide pigments and its dosage of color paste on near infrared reflectance, long wave emissivity and CIE color value of the coatings were investigated. UV/VIS/NIR spectrophotometer, infrared radiance gauge and precision chromatic meter were used to characterize optical performance of pigments and its coatings. The result reveals that, Compared with traditional pigments, Nickel iron chromite black spinel, Cobalt green and Titanium chrome yellow has higher near infrared reflectance, thus, is more appropriate to be the pigments of energy saving coating; Near infrared reflectance of energy saving coating can be influenced by color paste, when applied, the proper proportion of color paste of Nickel iron chromite black spinel coating is 10%wt while other pigments coating is 20%wt; Long wave emissivity of energy saving coating can hardly be influenced by color paste; Lightness of energy saving coating can be increased by Titanium chrome yellow and Iron oxide yellow color paste while lightness of other pigments coating can hardly influenced by color paste; In order to obtain good color performance coating, proper proportion of color paste is 20%wt.
