Indoor expansion steel structure fireproof coating

Expansion type steel structure fireproof coating refers to a steel structure fireproof coating with a coating thickness of 3mm (including 3mm) or less, good decorative effect, capable of expanding and foaming at high temperatures, and a fire resistance limit generally within 2.5 hours. This type of steel structure fireproof coating is generally a solvent based system, which has the characteristics of * bonding strength, good weather and water resistance, good leveling, and good decorative properties; When exposed to fire, it slowly expands and foams to form a dense and hard fire-resistant insulation layer. This fire-resistant layer has strong impact resistance, delaying the temperature rise of steel and effectively protecting steel components.

The construction of ultra-thin expansion type steel structure fireproof coating can be carried out by spraying, brushing or roller coating, and is generally used on building steel structures with a fire resistance limit requirement of less than 2.5. A new variety of ultra-thin steel structure fireproof coatings with a fire resistance performance of 2.5 hours or more has emerged. It is mainly composed of special structured polymethacrylate or epoxy resin compounded with amino resin, chlorinated paraffin, etc. as the base adhesive, attached with high polymerization degree ammonium polyphosphate, dipentaerythritol, melamine, etc. as the fireproof and flame-retardant system, added with inorganic refractory materials such as titanium dioxide and wollastonite, and compounded with 200 # solvent oil as the solvent. Various light steel structures, trusses, etc. often use this type of fireproof coating for fire protection.

Due to the ultra-thin coating of this type of fireproof coating, the use of thick and thin fireproof coatings for steel structures is greatly reduced, thereby reducing the total project cost and achieving effective fire protection for steel structures, resulting in a very good fireproof effect.