The occurrence of mold not only makes the surface of the eroded coating very ugly, but the mold which grows in the deep layer will break through the paint film and cause cracking and peeling. The mold eMITs a special stench, and people living in this environment are unhappy. Health is threatened; products produced in such an environment are susceptible to pollution and equipment and equipment are easily damaged. Such an environment is incompatible with civilized production. Therefore, people have been trying to fight against mold for a long time.
In the past, people used lime water to paint the walls and achieved two effects of sterilization and decoration. This is the prototype of modern anti-mold coatings. With the development of science, especially the rapid development of anti-mildew, fungicide production and technology, anti-mold coatings have developed rapidly. Today's anti-mold coatings are in the factories of cigarette factories, breweries and pharmaceutical factories where the environment is very harsh. Wall finishing, coating mildew life of more than 2 a, and the film is beautiful, decorative, and low toxicity. Researches on mold-proof coatings and mildew-proof fungicides are very active in countries all over the world, especially in the United States, Japan, and Europe. Every year, hundreds of patents and literatures are published. My defense mold coatings have developed rapidly in the past decade.
The anti-mold coating consists of a mildew-proof fungicide, a binder, a pigment and a filler, and an auxiliary agent. The task of formula design is to mix the anti-mold paint with qualified mildew resistance and algae resistance, and also has excellent decorative properties. Of course, it must also have sufficient storage stability and workability, as well as operability of production. . Nowadays, excellent anti-mold coatings should have the basic properties of conventional architectural coatings, non-toxic, unpleasant odor, good color and long-lasting effect, making it an environmentally friendly decorative functional coating.
In addition to the same functions as other common coatings, the anti-mold coatings are resistant to mildew and corrosion, so they generally act on the surface protection and decoration of steel, cement, glass steel, ceramics, enamel, water pipes, wood, etc. Mildew protection against corrosion. However, the most common things are applied to the surface of the building, so that the surface layer of the building is not susceptible to mold corrosion, causing the film to crack and peel off, thereby affecting its beauty and harming the health of the people.
a. Mildew in special production workshops
Some special production enterprises, such as pharmaceuticals, beer, soy products, dairy products, brewing, leather, cosmetics, etc., due to the rich nutrition of the products, the production environment is hot and humid, the temperature and humidity of the production environment are very suitable for the growth and reproduction of mold. Therefore, the mildew situation is quite serious, especially the interior walls and ceilings of the production workshop, some packaging workshops and warehouses (from raw materials to finished products) and even production equipment (such as fermentation tanks, tanks, tank outer walls), and there are different degrees of mold. Products produced and stored in such an environment will undoubtedly be polluted to varying degrees, causing potential harm to people's health, and factories are often forced to stop production. Therefore, the GMP standards for medicines and foods place demands on the mold and wall of the plant. The use of anti-mold coatings to properly coat the walls, ceilings and equipment of the production workshop is an economical and practical method for preventing mildew.
b. Anti-mold coating for residential building walls
In recent years, as the heating facilities of residential buildings have become more and more perfect, and the sealing performance of the rooms has been continuously strengthened, the moisture in the bathrooms and kitchens is not easily dissipated, and the molds tend to occur in the walls and corners. Especially in the rainy season, indoor walls will even condense water droplets, which is more suitable for the reproduction of fungi. Therefore, the incorporation of a mildewproof agent into architectural coatings for surface decoration to prevent mold production has caused widespread concern.
c. Anti-mold coating for underground engineering
Due to environmental conditions and other factors, underground engineering is different from above-ground engineering in terms of decoration materials and construction techniques. Some basement walls are only painted with ordinary paint. As a result, the project has not been completed yet. The wall surface has a large area of moisture, mildew, even powdering and falling off, which not only affects the quality of the project, but also affects the use of the building. The reason why underground engineering is prone to moisture and mildew is determined by its temperature and humidity conditions and biological environment. In biology, the optimal growth temperature of the common bacteria is above 370C, and the mold is at 260C; if the environmental humidity is greater than 80%, the mold can also rapidly multiply at 200C, and the basement just meets the above conditions. At the same time, the air flow in the basement and the cleanliness are poor, so the concentration of mold spores in the air is large. In addition, molds are more erosive to organic coatings. After the molds erode the paint film, the enzymes are secreted. These secretions will further decompose the organic film-forming substances in the paint and become nutrients for mold growth, thereby destroying the entire coating. Most of the coatings currently used are organic coatings, so underground engineering is prone to moisture and mildew.
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