Self-cleaning colorized solar heat reflecting coating

Abstract

Self-cleaning colorized solar heat reflecting coating is disclosed. The coating comprises a top coating composition and a primer composition. The top coating composition comprises fluorocarbon resin, titanium dioxide, near-infrared reflection pigment, an anti-settling agent, a defoamer, a dispersant, a levelling agent, a super-hydrophobic agent and an organic solvent. The primer composition comprises the fluorocarbon resin, the titanium dioxide, silicon dioxide aerogel, the anti-settling agent, the defoamer, the dispersant, the levelling agent, and the organic solvent. The coating can effectively reflect solar heat radiation and has a good self-cleaning property.

Description

technical field [0001] The invention relates to the field of fine chemical industry, in particular to a self-cleaning colored solar heat reflection paint. Background technique [0002] Most of the energy on earth comes from the sun. Coal, oil, natural gas, water energy, wind energy, biomass energy, etc. all come directly or indirectly from solar energy, and the sun is a necessary condition for human production and life. my country is particularly rich in solar energy resources. The solar energy radiated to the surface of objects is about 750 watts per square meter, and the areas with an annual cumulative sunshine time of more than 2,200 hours exceed 60% of my country's land area. But strong solar radiation will bring a lot of inconvenience to industrial production and human life at the same time. After long-term continuous irradiation by the sun, the energy on the surface of the object continues to accumulate, and the temperature rises significantly. Even in summer, the su...

AI Technical Summary

Problems solved by technology

[0004] At present, white heat-reflective and heat-insulating coatings are more common in the market, which can achieve better heat-reflecting effects, but on the one hand, only using white coatings will lead to a single color, which will affect the aesthetics and cannot meet individual needs, and most of the military applications White paint is also not suitable; on the other hand, white heat-reflective heat-insulating coatings mainly reflect visible light (400-750 nanometers) and have relatively low reflectivity to near-infrared (750-2500 nanometers). The heat in the near-infrared band accounts for 53%, which cannot be ignored

[0005] In addition, since the paint layer needs to be exposed to the natural environment for a long time, if dust and oil stains adhere to the paint surface, it will not only affect the appearance, but also greatly reduce the ability to reflect solar radiation

If it is manually cleaned, it is time-consuming and labor-intensive, especially difficult for tall buildings

Most of the existing solar heat reflective coatings cannot keep the surface clean for a long time, which accelerates the attenuation of the heat insulation temperature difference and affects the efficiency of reflecting solar energy. This problem greatly hinders the promotion and sales of heat reflective heat insulation coatings

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