First, the advantages of polyurethane waterproof coating: (1) Polyurethane waterproof coating is an isocyanate group-containing prepolymer formed by addition polymerization of isocyanate, polyether, etc., with catalyst, anhydrous additives, anhydrous fillers, solvents, etc., after mixing and other processes Processed one-component polyurethane waterproof coating. (2) This type of coating is a reaction-curing (moisture-curing) coating, which has the characteristics of high strength, high elongation, and good water resistance. It has strong adaptability to the deformation of the base layer. (3) Polyurethane waterproof coating is a one-component environmentally friendly waterproof coating constructed in liquid state. It is based on imported polyurethane prepolymer and has no additives such as tar and asphalt. It is cured after contact with moisture in the air. The surface of the base layer forms a solid and tough seamless seamless integral anti-film.

Second, the characteristics of polyurethane exterior wall spraying 1. Rigid foam polyurethane has good thermal insulation effect. Rigid foam polyurethane is an excellent thermal insulation material, and its thermal conductivity is 0.024W/(m·K); spraying forms a continuous thermal insulation layer, which ensures the thermal insulation material and the wall. integrity and effectively block thermal bridges. 2. The dual thermal insulation effect of polyurethane thermal insulation and rubber powder polystyrene particles. The two are combined through the interface agent to exert their respective effects. 3. No cavity structure, strong wind pressure resistance. The sprayed rigid foam polyurethane insulation layer is firmly combined with the base wall, forming an organic whole with the base wall, without joints and cavities, reducing wind pressure, especially Damage of negative wind pressure to external thermal insulation system of high-rise building exterior wall. 4. Excellent heat resistance and waterproof performance. Rigid foam polyurethane has excellent thermal insulation performance and unique impermeability. It combines the two functions of waterproof and thermal insulation into one, and can be completed at one time during construction. It can replace the traditional waterproof layer and thermal insulation. Layers are widely used for roof and wall insulation. 5. Excellent fire resistance. After adding flame retardant, polyurethane is a kind of flame-retardant and self-extinguishing material. The surface of polyurethane and the sides of doors and windows are all tightly packed with rubber powder and polystyrene particle slurry with a combustion performance grade of B1. When exposed to fire and heat, the heat transfer to the interior is small and slow, and the heat is concentrated on the surface of the rubber powder polystyrene particle slurry layer, which is beneficial to improve the fire resistance of the insulation layer. 6. It has good construction performance. The rigid foam polyurethane spraying adopts mechanized operation, and the construction speed is fast and the efficiency is high. 7. Good environmental protection. The thermal insulation material itself has high chemical stability and adopts fluorine-free products.