Paint knowledge | two component polyurethane waterproof coating construction process two component polyurethane waterproof coating ratio

Core tip: waterproof coating is essential in modern life It can prevent water from invading and leaking It is generally used in the exterior walls of buildings, kitchens, bathrooms, bathrooms, balconies and other places vulnerable to water invasion Two component polyurethane is one of our commonly used waterproof coatings, so how about its construction process and proportion? Let's have a look! Waterproof coating introduction waterproof coating refers to a coating formed by coating that can prevent rainwater or groundwater leakage It can contact with the moisture in the air and then solidify, forming a tough seamless overall waterproof membrane on the surface of the base layer The waterproof membrane has certain extensibility, elasticity and plasticity Paint knowledge | precautions for wall paint color selection Recommended introduction: when painting the wall, the owner sometimes has difficulty in choosing what color of the wall paint to paint In fact, there is no ugly color in the wall paint, only the disharmonious color matching The use of wall color contains the knowledge of health Too strong color will stimulate people's perception, make people have a sense of fidgety, affect people's mental health Grasp the basic principles of wall color and paint a colorful space 1、 Wall paint color selection notice 1 Light color is generally used for the top surface Light colors make people feel light, dark colors make people feel heavy Usually, the treatment of rooms is from top to bottom, from shallow to deep For example, the ceiling and walls of rooms are white and Paint Home News: waterproof paint is essential in modern life It can prevent water intrusion and leakage It is generally used in the exterior walls of buildings, kitchens, bathrooms, bathrooms, balconies and other places vulnerable to water intrusion Two component polyurethane is one of our commonly used waterproof coatings, so how about its construction process and proportion? Let's have a look! Waterproof coating introduction waterproof coating refers to a coating formed by coating that can prevent rainwater or groundwater leakage It can contact with the moisture in the air and then solidify, forming a tough seamless overall waterproof membrane on the surface of the base layer The waterproof membrane has certain extensibility, elastoplasticity, crack resistance, impermeability and weather resistance, which can play the role of waterproof, seepage prevention and protection Waterproof coating has good temperature adaptability, easy operation, easy maintenance and repair The waterproof materials in the market are divided into polyurethane waterproof coating and polymer cement-based waterproof coating Two component polyurethane waterproof coating is a kind of polyurethane waterproof coating It is a two-component reactive curing waterproof coating Component A is a prepolymer made by polymerization of polyether resin and diisocyanate, and component B is refined by vulcanizing agent, catalyst, resin and other auxiliaries The components a and B are mixed in a certain proportion and stirred evenly, and then coated on the base layer After curing reaction, the whole rubber like elastic waterproof membrane is formed Construction process and proportion of two-component polyurethane waterproof coating 1 Construction process: base cleaning → 1:2 proportion mixing of group A and group B → additional layer treatment of node → first coating and scraping → vertical and horizontal multiple coating and scraping to the design thickness → inspection → acceptance 2 Base course treatment: the base course shall be solid, flat and smooth without sand holes and cavities, and shall be clean and dry If there are sand holes and holes, cement mortar shall be leveled It is required to smooth or press the putty filled with 10%-20% cement 3 Coating primer: firstly, polyurethane A and B materials are added into xylene, and the weight ratio is 1:1.5:2 Mix them evenly to prepare the primer, and the preparation amount should not be too much Then, the long roller brush shall be applied on the cleaned base course surface evenly, and the base shall not be piled up or exposed during painting The amount of painting shall be about 0.2kg per square meter After painting, it shall be dried and solidified for more than 4h, and the next process can be carried out when the hand feel is not sticky 4 Preparation of waterproof coating: according to the construction demand, mix the polyurethane A and B materials in the proportion of 1:2, pour them into the mixing barrel, and mix them with the electric mixer with the speed of 100-500r / min for about 5min, then they can be used The mixed material should be used as needed and used up within 2 hours after preparation If the viscosity of the mixed material is too large and it is inconvenient for construction, a small amount of diluent can be added and uniformly stirred before painting construction 5 Waterproof coating construction: after the primer is basically dry and solidified, scrape a layer of coating evenly with plastic or rubber scraper The thickness is required to be uniform when scraping, generally about 0.6mm is appropriate At the beginning of scraping, according to the size, shape and environment of construction area, the construction withdrawal and scraping sequence shall be considered uniformly After the first coating is cured for 4h, the second coating shall be scratched on its surface The application method is the same as that of the first coating, and the direction must be perpendicular to the direction of the first coating In our life, waterproof coating is widely used in various places where waterproof and anti-seepage are needed The two-component polyurethane waterproof coating is also favored by people because of its advantages such as convenient operation, short construction period, strong adhesion and good extensibility About the construction technology and proportion of two-component polyurethane waterproof coating, I'd like to introduce it to you here I hope the introduction of Xiaobian can help you! 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