Exterior wall paint is not better than interior wall paint. The latter can be repainted every year. It is impossible to use it as an exterior wall. Therefore, the choice of exterior wall paint needs carefulness. When choosing paint for exterior wall decoration, it is necessary to distinguish the type of the building, whether it is a multi-storey building or a high-rise building, whether it is the renovation of a new building or an old building and the maintenance period and other requirements. The following Qijia Xiaobian mainly introduces inorganic exterior paints for everyone.
Inorganic wall coating is made of inorganic bonding material as the main filming substance, and then added with various pigments, fillers, additives and water. This type of coating uses water-soluble alkali metal silicate or water-dispersible silica colloid (commonly known as silica sol) as the main film-forming substance. The coating film has excellent weather resistance, is very stable under the action of ultraviolet rays, and has good heat resistance. It is non-flammable and smoke-free in case of fire; it is resistant to pollution and hard to attract dust; it can maintain a bright decorative effect; it generates no volatile solvents during production and use, and does not pollute the environment; its raw material resources are abundant. The material is the most abundant silica in the earth's crust, so it has received widespread attention. However, its coating film is not full and has poor decoration, which limits its use. Inorganic architectural coatings are a category of water-based architectural coatings. They have excellent performance, are easy to use, and are good for environmental protection. They meet the development trend of high performance and low pollution of coatings.
How to buy:
Inorganic wall paints are mostly used in construction projects. Users should pay attention to the following points when purchasing products:
1, do not only consider the price factor, should pay attention to the quality of the product, buy well-known enterprises in accordance with the requirements of the national standard exterior wall paint.
2. To check the appearance and logo, first of all, ensure that the drums are in good condition, in particular, there should be no rust leakage at the joints or welds of the iron drums; then look at the clear signs on the drums, product model, name, batch number, The color number, standard number, weight, factory name, site, production date, and expiration date should be complete.
3. Understand the main film-forming substances and construction precautions of the purchased products. Inorganic wall coating construction should pay attention to the following matters: As the inorganic wall coating is an inorganic material as a film material, the adhesion of inorganic substrates is better, but in the organic substrate construction, pay special attention to adhesion and related Expansion coefficient, otherwise it is easy to cause film peeling off. Even in the construction of inorganic substrates, the water absorption, pH value, presence of cracks, and presence of contaminants should be taken into account.
Special attention should be paid to the curing period of the coating. Because the reaction mechanism of the inorganic coating is more complex and requires a longer drying time, the expected performance will not be achieved. technical standard:
The test standard for inorganic exterior coatings is: JG/T26—2002 “Inorganic Building Coatings for Exterior Wallsâ€. The main technical performance indicators are: container status, construction, film appearance, contrast ratio, thermal stability, low temperature stability, surface dry time, scrub resistance, water resistance, alkali resistance, temperature resistance, coating resistance Staining, artificial aging resistance and so on.
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