Under normal conditions, the fire retardant coating has a good decorative effect as an exterior decorative layer of high-grade wood decorative materials; it expands when exposed to fire and forms a uniform and dense honeycomb or sponge-like carbonaceous foam layer, making flames and objects Insulate, stop or retard combustion, to achieve the purpose of fire extinguishing, and have a good protective effect on flammable substrates. Fire-retardant coatings are mainly composed of artificially synthesized non-combustible or non-combustible organic polymer resins. The organic polymer resin is modified with special groups. The resin itself can have a certain amount of flame-retardant groups and foamable groups. , Then add a small amount of flame retardant, foaming agent, carbon source and other components to form a fire protection system. At the same time, the pigments used in fire-retardant coatings are usually white, titanium, mica, and asbestos, because these pigments have a high heat dissipation performance and are also beneficial to fire protection. Among them, antimony white powder has a strong ability to reflect infrared rays. Flames reflect heat and are widely used in fire retardant coatings.
The application of fire retardant coatings on organic synthetic materials has broad prospects. With the large number of applications of organic synthetic materials, flame-retardant organic polymers containing halogens often lead to deterioration of physical properties of materials, shortened service life, and increased prices. The use of fire-retardant coatings on its surface for fire protection not only maintains the good properties of the original organic synthetic materials, but also is economical. In addition, structural steels lose their structural strength when they are heated to about 540°C. Concrete structures are also susceptible to cracking and disintegration under high temperature flames. Therefore, the steel structure and the concrete structure are fire-protected, so that they can prolong the time of deformation and destruction in the event of a fire, winning time for firefighting and reducing the fire loss, and receive great attention from people. The application of fire retardant coatings in steel structures and cement structures is expanding.
At present, domestic fireproof coatings are inflated and are mainly used for the surface of wood decorative materials. When the surface of an object coated with a fireproof coating is in contact with fire, the fireproof coating can quickly expand and expand in a short period of time, delaying the development of combustion.