Building thermal insulation is an important aspect of saving energy, improving living environment and using function. Building energy consumption generally accounts for 30-40% of the total human energy consumption, most of which are energy consumption of heating and air conditioning, so building energy conservation is of great significance. Moreover, because the thermal insulation coating takes water as dilution medium, does not contain volatile organic solvents, and does not harm to human body and environment; its production cost is only about 1/5 of the same kind of foreign products, and as a new type of thermal insulation coating, it has good economic benefits, energy saving and environmental protection, thermal insulation effect and simple construction and other advantages, and has attracted more and more attention and favor. And this kind of space thermal insulation reflective coating is undergoing a transformation from industrial thermal insulation to building thermal insulation, from thick layer to thin layer thermal insulation technology, which is also one of the main development directions of thermal insulation materials in the future. Space reflective adiabatic coatings construct effective thermal barrier through vacuum cavity layer formed by ceramic spherical particle hollow material in the coatings. It not only has high thermal resistance and low thermal conductivity, but also has high thermal reflectivity, reduces the absorption of solar radiation heat by buildings, and reduces the temperature of the covered surface and interior space. Therefore, it is universally recognized by experts as a high-efficiency energy-saving with development prospects. One of the materials.
Nowadays, the global thermal insulation materials are developing towards the integration of high efficiency, energy saving, thin layer, thermal insulation and waterproof external protection. While developing new thermal insulation materials and conforming to structural thermal insulation and energy saving technology, more emphasis is laid on the targeted use of thermal insulation materials, design and construction according to standard standards, and strive to improve thermal insulation efficiency and reduce costs. Research on thin thermal insulation coatings has been carried out at home and abroad. Several companies in the United States have produced such insulating ceramic coatings, such as Thermo-Shield of SPM, Thermal Protective Systems, Therma-Cover of J.H. International, etc. This space insulating ceramic layer is developed on the basis of NASA's principle of controlling the thermal conduction of the space shuttle. It is suitable for high pressure spraying, pollution-free, and has good thermal radiation resistance, thin insulation, waterproof and anticorrosion properties. The material has been transferred to general industrial and civil thermal insulation. There are also many domestic enterprises in the development of such materials, such as thin heat insulation and reflection coatings, solar heat reflection and insulation coatings, water-borne heat reflection and insulation coatings, heat insulation and sunscreen coatings, ceramic heat insulation coatings and so on. It mainly adopts the film-forming materials with good weather resistance, water resistance, aging resistance, strong cohesion and elasticity, and good compatibility with thermal insulation fillers and reflective fillers. It chooses fillers with light weight, hollow, high temperature resistance, high thermal resistance and good reflectivity and radiation. Ultrafine powder with high refractive index, high surface finish, high thermal reflectivity and high emissivity is suitable for use as the fillers. Reflective filler, together with film-forming base material, forms a low radiation heat transfer layer, which can effectively isolate heat transfer. The thin-layer heat-insulating reflective coating can be used in different places such as buildings, vehicles, ships, petrochemical oil tank equipment, grain depots, refrigerators, containers, pipelines and so on.