The effect of waterproofing projects depends on many factors, such as the selection of early waterproofing materials and the study of later construction techniques. The water-based polyurethane waterproofing solvents introduced today have a wide range of applications, and they are safe and reliable. Non-polluting, it is a green and environmentally friendly new building material product. In addition, its excellent mechanical properties and good compatibility also make them stand out in the fiercely competitive market. However, considering the differences in actual conditions in the later period, we When using it specifically, you should refer to the water-based polyurethane waterproof coating formula mentioned below, select and prepare the corresponding appropriate materials, and achieve satisfactory results through cooperation and deployment. 1. Water-based polyurethane waterproof coating formula: 100 kg of emulsion, 300 kg of water, 0.5 kg of defoaming agent, and 1 kg of preservative. Stir the disperser at 300 rpm for 20 minutes until uniform. Powder components: 50 kg of No. 425 cement, 30 kg of 200 mesh quartz stone, and 20 kg of 80 mesh quartz stone. Mix with a dry mixer for 30 minutes. Ratio: liquid material: powder material = 1:2.77 combination. Just stir evenly and apply. It should not be too thick or too thin. If it is too thick or too thin, you can adjust the emulsion manufacturer, the proportion of cement and quartz stone and the mesh size of the quartz stone. Water-based polyurethane coating has superior comprehensive performance, high fullness, film hardness can reach 1.5-2H, wear resistance even exceeds that of oil-based paint, and has obvious advantages in service life and color matching. It is a high-end product among water-based paints. The technology is mastered by only a few specialized companies around the world. In China, only Dongguan Dingyuan Industrial Co., Ltd. took the lead in completing the localization of this core technology and holds a national invention patent. In addition, there is a type of water-based wood paint with acrylic as the main component. Its main feature is good adhesion and will not deepen the color of the wood. However, it has poor wear resistance and chemical resistance, and the hardness of the paint film is soft. The pencil rule test is HB. , the fullness is poor, the overall performance is average, and construction defects are prone to occur. Because of its low cost and low technical content, it is the main product introduced to the market by most water-based paint companies. This is also the reason why most people think that water-based paint is not good. The advantage is that it is cheap. 2. Classification of water-based polyurethane waterproof coatings 1. According to particle size and appearance, it can be divided into polyurethane aqueous solution (particle size <0.001 micron, transparent appearance), polyurethane aqueous dispersion (particle size: 0.001-0.1 micron, translucent appearance), polyurethane Emulsion (particle size >0.1 micron, white and turbid appearance); 2. Depending on the charge properties of the hydrophilic group, water-based polyurethane can be divided into anionic water-based polyurethane, cationic water-based polyurethane and non-ionic water-based polyurethane. Among them, the anionic type is the most important and is divided into two categories: carboxylic acid type and sulfonic acid type. 3. According to different synthetic monomers, water-based polyurethane can be divided into polyether type, polyester type and polyether and polyester mixed type. Depending on the diisocyanate selected, water-based polyurethane can be divided into aromatic and aliphatic, or specifically divided into TDI type, HDI type, etc. 4. According to the product packaging form, water-based polyurethane can be divided into single-component water-based polyurethane and two-component water-based polyurethane. 5. The entire synthesis process of water-based polyurethane can be divided into two stages. The first stage is pre-stepwise polymerization, that is, a water-based polyurethane prepolymer with a relative molecular mass of l000 is generated from oligomer diol, chain extender, water-based monomer, and diisocyanate through solution step-by-step polymerization; the second stage is medium and dispersion of prepolymer in water. As a basic waterproof coating, there are many formulas for water-based polyurethane waterproof coatings, and there are many product classifications. Therefore, we should make preparations based on the specific actual situation and refer to the materials available around us as well as demand and budget information. , for example, as you can see from the above, there are many materials that can cooperate with water-based polyurethane, and the difference in dosage also determines the later waterproofing effect. For friends who are making preparations for the first time, the best method is Combined with the formula mentioned above, try to achieve a satisfactory waterproof effect and avoid additional losses and troubles.