Building radiation cooling coating structure and manufacturing method thereof

The invention discloses a building radiation cooling coating structure which covers the outer surface of a building and comprises a coupling agent layer, a solar spectrum radiation total reflection layer and an infrared emission layer from inside to outside. In particular to an infrared emission layer containing a polydimethylsilane and polymethyl methacrylate composite cooling material, which not only ensures a radiation cooling function, but also ensures the mechanical stability of a formed film. Sunlight is reflected through the solar spectrum radiation total reflection layer, absorption of energy in the sunlight is reduced, heat of a building is radiated outwards through the infrared emission layer, radiation absorption of sunlight in the daytime is reduced, meanwhile, release of infrared radiation with the wavelength of 8-13 micrometers at night is enhanced, and therefore the overall temperature of the building is reduced. 本发明公开了一种建筑物辐射降温涂层结构，所述辐射降温涂层结构覆盖在建筑物外表面，包括由内至外的偶联剂层、太阳光谱辐射全反射层及红外发射层，尤其涉及一种含有聚二甲基硅