A blue series of thermal infrared reflective composite pigment was prepared by rutile TiO2 enwrapped with phthalocyanine dye (Direct Fast Turquoise Blue GL), and the enwrapping process of TiO2 was studied. The optimal process conditions were obtained as follows: mass ratio of BaCl2 to TiO2 0.2, reaction temperature 80 ℃ and pH 8. The infrared reflectivity, thermal insulation property, and acid/alkali resistance of a coating with the composite pigment were examined. Results revealed that the infrared reflectivity of the coating with the blue composite pigment is up to 81.5％, an increase of 37.9％ as compared with that of the mixed pigment coating with near color; the bottom temperature of the coating containing composite pigment is about 13.6％ lower than that of the coating with cobalt blue pigment, and about 10.6％ lower than that of the coating with mixed pigment. The coating with pigments of TiO2 enwrapped by phthalocyanine dye has good acid and alkali resistance.%采用酞菁染料(直接耐晒翠蓝GL)包覆金红石型TiO2制备蓝色系列红外热反射复合颜料,研究了TiO2的包覆工艺,获得了较优的工艺条件如下:m(BaCl2)∶m(TiO2)=0.2,反应温度80 ℃,反应液pH=8.将此复合颜料制成涂料,研究了涂料的红外反射、隔热及耐酸碱性能.结果显示,含此蓝色复合颜料的涂层其红外反射率高达81.5%,比颜色相近的混合颜料涂层的反射率提高了37.9%;含复合颜料的涂层其底面温度比含钴蓝颜料的涂层降低约13.6%,比含混合颜料的涂层降低约10.6%;该含酞菁染料包覆TiO2颜料的涂料具有较好的耐碱性和耐酸性.
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