Fireproof coating is one of the special coatings and an important part of fireproof building materials. Fire-retardant coatings are generally used on the surface of steel structural substrates to reduce the flammability of steel surfaces and retard the rapid spread of fires to improve the fire resistance of steel. Applying high-performance fire-retardant coating to the surface of the substrate not only can play a decorative role, but also anti-corrosion, anti-rust, acid and alkali resistance, smoke resistance, etc. More importantly, fireproof coatings can prevent the spread of flames in the event of a fire, control the development of fire, and effectively protect the internal structure.
Flame retardant system materials are the core of fire retardant coatings, and their properties have a great impact on the performance of fire retardant coatings. There are two kinds of flame retardants: inorganic and organic. Inorganic flame retardants are mainly additive types, including lanthanide flame retardants, aluminum hydroxide, magnesium hydroxide flame retardants, phosphorus-containing inorganic flame retardants, boron-containing and molybdenum-containing resistors. Fuel and smoke suppressant. They are characterized by thermal stability, low toxicity, no corrosive gas, and long-lasting flame retardancy. However, due to their large amount of filling in the polymer and the inherent characteristics, they reduce the high polymer. Processing formability, mechanical properties, electrical properties, etc.
Magnesium hydroxide is currently the most popular environmentally friendly flame retardant. It has good flame retardant effect when added to fireproof coating, has the characteristics of fire resistance, high adhesion, good water resistance and no toxic gas. At present, the dosage of magnesium hydroxide flame retardant is increasing at a rate of 20% per year, which has broad market prospects. On the other hand, due to the small size effect, surface and interface effects, quantum size effects and macroscopic quantum tunneling effects of nanomaterials, has the advantages of low filling amount, high flame retardant efficiency, etc. According to the above characteristics, the surface of magnesium hydroxide can be modified to be modified into nanometer magnesium hydroxide, and the effect of nanometer magnesium hydroxide as a flame retardant for fireproof coatings will be better.