Compared with thick and thin coating types, ultra-thin steel structure fireproof coating manufacturers have finer particle size, thinner coating, less usage, convenient construction, and better decorative properties, making them a hot research topic in the field of steel structure fireproof coatings. The influence of synthesis conditions, initiator dosage, ratio, reaction time, etc. of acrylic resin on the fire resistance of coatings was studied. The influence of the combination of acrylic resin and epoxy resin as base materials on the performance of coatings, as well as the effects of expandable graphite (EG), ammonium molybdate (AM), nano Mg (OH) 2, expandable graphite and ammonium molybdate, and expandable graphite and nano Mg (OH) 2 synergistic use on the fire resistance of coatings were studied. The vertical combustion method was used to determine the fire resistance limit. Thermogravimetric analysis was used to study the thermal stability of fire-resistant coatings. Established a dynamic model for fireproof coatings and calculated the activation energy. The results showed that the best fire resistance of the resin was achieved when the initiator dosage was 1.3g, the solvent dosage was 65g, the butyl acrylate dosage was 30g, and the monomer was added dropwise for 120min. The combination of resin can effectively improve the situation of small cracks in the coating when acrylic resin is used as the base material, and can enhance adhesion. When the 2:3 combination is used as the base material, the fire resistance time of the fireproof coating is increased by 3.8 minutes.

Expanded graphite, ammonium molybdate, nano Mg (OH) 2 and their synergistic use can effectively improve the fire resistance of coatings. Based on the exploration of single factor conditions, the formula was optimized: thermoplastic acrylic resin 3.0g, melamine polyphosphate (MPP) 1.0g, melamine (MEL) 3.0g, pentaerythritol (PER) 1.0g, expandable graphite 0.5g, ammonium molybdate 0.65g, nano Mg (OH) 20.14g. When the coating thickness is 1.80mm, the fire resistance limit is 146min. The physical and chemical properties of fireproof coatings meet the requirements of "Steel Structure Fireproof Coatings" (GB14907-2002) for ultra-thin steel structure fireproof coatings. Dynamics analysis shows that during the stages of 200 ℃~330 ℃ and 330 ℃~500 ℃, the activation energy of expandable graphite/ammonium molybdate coating is higher than that of ammonium molybdate, expandable graphite, and expandable graphite/nano Mg (OH) 2 coating, with lower reaction activity and better fire resistance, consistent with the results obtained by vertical combustion method.  

According to the usage in each place, there are different types of fireproof coatings. When we distinguish fireproof coatings, whether it is based on the thickness or material difference of fireproof coatings, fireproof coatings can be classified in various ways. Below, we have also classified fireproof coatings according to their usage areas. 

Fireproof coatings are divided into the following types: steel structure fireproof coating manufacturers, thick coated steel structure fireproof coatings, thin coated steel structure fireproof coatings, ultra-thin steel structure fireproof coatings, decorative fireproof coatings, cable fireproof coatings, and prestressed concrete fireproof coatings. 

1. Steel structure fireproof coating, brushed or sprayed on the surface of steel structures, plays a role in fire prevention and insulation, thereby preventing the steel from rapidly heating up and reducing its strength in a fire, and avoiding the steel structure from losing its supporting ability and causing building collapse.

2. Thick coated steel structure fireproof coating, which does not expand during a fire, relies on the non flammability, low thermal conductivity or heat absorption of the material in the coating to delay the heating of the steel and protect the steel components. 

3. Thin coated steel structure fireproof coating can expand and foam when heated, and the fire-resistant insulation layer formed by the expansion foam can delay the heating of steel and protect steel components.

4. Ultra thin steel structure fireproof coating expands and foams when exposed to fire, forming a dense fireproof insulation layer.

5. Decorative fireproof coating has the function of preventing the spread of fire and protecting combustible substrates in the event of a fire.

6. The cable fireproof coating has good physical and chemical properties and weather resistance. The coating is thin and can generate a uniform and dense sponge foam insulation layer in case of fire. It has significant heat insulation and fire prevention effects, so as to protect the cable, prevent the spread of flame, and prevent the occurrence and development of fire.

7. Pre stressed concrete fireproof coating can effectively block flames and heat, reduce the speed of heat transfer to the concrete and its internal prestressed steel bars, delay their heating time, thereby improving the fire resistance limit of prestressed floor slabs and achieving the purpose of fire protection. Zhejiang fireproof coating manufacturer