Paint knowledge: construction process of polyurethane waterproof coating

Core tip: polyurethane waterproof coating is a kind of waterproof coating which is made of isocyanate, polyether and other substances through polymerization and processing, together with auxiliary materials such as anhydrous assistant, catalyst, easy and anhydrous filler Polyurethane waterproof coating has high strength, good water resistance, large extension, and strong adaptability to base deformation It is a kind of environmental protection waterproof coating, which is often used for painting on roofs, basements, bathrooms and other places Let's learn about the construction process of polyurethane waterproof coating 1 First of all, clean up the sundries on the base, and use a blade to stick some of them on the base Paint knowledge how about Akzo Nobel Powder Coating Recommended introduction: powder coating is a kind of coating with different form from general coating, which is in powder form It is a new type of coating, because of its own advantages and more and more known by people Let's introduce Akzo Nobel Powder coating Akzo Nobel Powder coating is a cost-effective coating solution, which can be applied to different kinds of products After the treatment of static electricity and fire baking, a tough and durable coating surface will be formed, with the least impact on the environment Since the introduction of this technology, powder coating has been able to continue to maintain the Coating home news: polyurethane waterproof coating is a kind of waterproof coating which is produced by the polymerization of isocyanate, polyether and other substances, and then with auxiliary materials such as water-free auxiliary, catalyst, easy and water-free filler Polyurethane waterproof coating has high strength, good water resistance, large extension, and strong adaptability to base deformation It is a kind of environmental protection waterproof coating, which is often used for painting on roofs, basements, bathrooms and other places Let's learn about the construction process of polyurethane waterproof coating 1 To clean the base course, first clean up the sundries on the base course, use a blade to remove some ash skin stuck on the base course, and then use a broom to clean up the dust, especially the parts from the drainage outlet, floor drain, etc., which should be cleaned more carefully If there is oil stain, it should be polished off with steel wire ball or wire brush, sandpaper, etc., and the sunken area should also be leveled with sandpaper 2 Brush the primer to mix the two components of polyurethane coating a and B and xylene in the proportion of 1:1.5:0.2 by weight, and then brush the prepared primer evenly on the surface of the base course with the paint brush Pay attention not to brush too thin or too thick, and let it dry naturally for about 4 hours after brushing 3 The step of detail additional layer is mainly to brush some weak parts, mix and mix the two components of polyurethane A and B in the proportion of 1:1.5, and brush with paint on the floor drain, pipe mouth, water outlet and other parts that are easy to leak, and the weak parts shall be brushed carefully, so as not to leak 4 For the first layer of coating, mix the two components of polyurethane waterproof coating a and B and xylene according to the proportion of 1:1.5:0.2 by weight, mix them in the mixing barrel for five minutes with the mixer, and then scrape the coating with the rubber scraper once, the thickness must be uniform, and brush them from the inside out 5 After the first coating of the second coating is brushed, the second coating can be applied after it is naturally cured to non stick The material ratio of the second coating is the same as that of the first coating, but the direction of painting should be perpendicular to that of the first coating, so as to keep the thickness uniform and the amount of painting is the same as that of the first coating 6 The third layer of coating the third layer of coating is also carried out after the second layer of coating is cured to non stick, the material ratio is still the same, and the painting method is the same, but the scraping amount should be reduced by half After coating, before it is cured, spread some clean stone slag on the coating surface, which can increase the adhesion between the coating and the cement mortar coating Well, the construction process of polyurethane waterproof coating is introduced here In the process of operation, the batching should be determined according to the workload of the day, not too much, otherwise it will cause serious waste If the viscosity of the paint after mixing is too large to be brushed, a little xylene can be added to dilute it, but the proportion added shall not exceed 10% of component B The waterproof coating shall be well done After the acceptance, the 24-hour water storage test shall be carried out If there is no leakage, the next step can be carried out If there is leakage, the waterproof coating shall be redone.