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Thermal insulation coatings lead the development of energy-saving coatings indus

China is in the period of rapid urbanization and industrialization. At present, China's new housing area is as high as 1.6 billion to 200 million square meters per year, but more than 95% of new buildings are still high-energy buildings. The heating energy consumption per unit of building area is similar to the climate. About three times that of developed countries, China's building energy consumption has accounted for nearly 30% of national energy consumption. If the building energy conservation work still maintains the current situation, the building energy consumption will reach 1.089 billion tons of standard coal by 2020, and only the peak load of the air conditioner will be equivalent to the full power generation of 10 Three Gorges power stations. Therefore, it is imperative to vigorously develop building energy efficiency. It is imperative to vigorously develop building insulation.

  

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The research of thermal insulation coating originated from the need of temperature control of the aircraft, and then it was used in the petroleum industry to achieve a good cooling effect, reducing the use of water spray on the outer wall of the storage tank, ensuring the safety of the storage tank and gradually expanding to civilian use. Used on buildings and industrial equipment.


According to the different mechanism of thermal insulation, thermal insulation coatings can be divided into three types of thermal insulation coatings: barrier type, reflective type and radiation type:


(1) The thermal insulation mechanism of the thermal insulation coating that blocks thermal energy conduction is to shield the heat exchange by using a low thermal conductivity. After the coating is formed into a film, the coating film is filled with pores, the density of the dry coating film is very low, and the thermal conductivity (λ) is generally less than 0.06 W/(m·K), so that the thermal insulation property is good, and the barrier property is good. The thermal insulation effect of the type thermal insulation coating is closely related to the coating film thickness.


(2) The heat insulation mechanism of the thermal radiation heat-insulating coating is to radiate the heat absorbed by the object into the air at a certain wavelength by the radiation form of the wave, thereby exerting the effect of cooling and cooling.


(3) The heat-insulating mechanism of the reflective heat-insulating and cooling coating is to reflect the visible light and the near-infrared light in the sun to the external space through the reflection of the coating film, so that most of the energy reflected by the sun on the coating film is reflected. The thermal insulation properties of the coating are only related to the reflectivity of the surface of the coating, regardless of the thickness of the coating.


As a kind of heat insulation means of building, heat-insulating paint can play the role of heat-reflecting heat insulation, heat radiation heat insulation or heat insulation and energy-saving effect. The heat insulation cooling can reach above 20 °C. At present, the energy consumption caused by the cooling and cooling equipment based on air-conditioning in China's buildings accounts for about 1/3 of the energy consumption of the entire building. Research and development of thermal insulation coatings to reduce or prevent the warming caused by strong sunlight, prevent heat conduction, keep heat energy from being lost, and have extensive social and economic benefits for industrial and civil fields, saving energy, improving people's lives and work. The environment is important. Therefore, thermal insulation coatings have led the development of the energy-saving coatings industry to a certain extent.


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