Composition: It is composed of high flash point acrylic modified alkyd resin, pentaerythritol, melamine, ammonium polyphosphate, titanium dioxide, and high flash point solvent.
Fire resistance limit: 1-1.5h.
Application: It is suitable for fire protection and decoration of indoor steel structures. It plays an important role in controlling early fires, a special fire retardant coating for indoor steel structures with fire prevention and decoration functions. Not suitable for outdoor application.
Color: white, gray
Performance introduction: fast drying, good interlayer adhesion, superior fire resistance. When steel structure under flame or high temperature, a uniformly air-tight foam insulation layer is formed, containing the sabotage that heat inflicts on the substrate and the steel structure sustaining longer till collapse. It’s critical in preventing the fire from spreading to give ample time for safe escape. With eco-friendly solvents, no irritating odor during application, non-toxic, no pollution to the environment.
Theoretical consumption: 6-7㎏/㎡ (calculated based on 2.7mm dry film, excluding loss)
Specific gravity: about 1.50
Drying time: 25℃ touch dry ≤8h, hard dry ≤24h
Painting method: high pressure airless spraying, brushing, rolling
Surface treatment: The rust stains on the surface of the steel should be thoroughly removed so as not to affect the adhesion of the coating. The rust removal treatment is in accordance with the "Code for Application and Acceptance of Steel Structure Engineering" standard.
Supporting paint: none
1. The paint should be mixed thoroughly before application. The paint should be adjusted to a suitable viscosity to prevent sagging and falling during spraying or rolling. During and after application but before the coating is dried and solidified, the ambient temperature should be 5～35℃, the relative humidity should be ≤85%, and in good air circulation.
2. The thickness of the coating should be controlled according to requirements until it reaches the specified thickness (the thickness of each coating does not exceed 0.2mm). The application time interval is more than 8-10 hours, ambient temperature 5-35℃, the substrate temperature 5-40°C. The relative humidity of the air is not more than 85%, in good ventilation, and the wind speed not more than 5m/s. It is not suitable for outdoor operation or when dew forms on the surface of structure.
3. The surface of the fireproof coating should be protected from rain. During the application and after completion, sun and rain shall be avoided.
Testing methods and maintenance time
1. Physical and chemical performance testing
1.1 Substrate and pretreatment: Use standard steel beams as the substrate. After the rust is completely removed, rust prevention shall be carried out according to the standard procedure.
1.2 Test Coating on sample piece: the first coating of 0.1mm thick fireproof coating, the second coating after 24 hours, following coating with interval of more than 8 hours and each coating thickness not exceeding 0.3mm until it reaches the specified thickness. After that, it should be smoothed and trimmed to ensure uniformity and flatness. Put the coated side horizontally upward on the test pad for drying and curing.
1.3 Testing thickness regulation: Solid dry coating thickness is (2.7±0.2) mm, touch dry thickness not exceeding 0.2mm.
1.4 Curing time regulation: Curing for 20 days at temperature of (23±2) ℃ and relative humidity of (50±5)%.
1.5 After the curing period of the test piece matures, sealing its edge with a 1:1 melt of paraffin wax and rosin (the sealing edge width shall not be less than 5mm). Perform the test after curing for 24 hours.
2. Fire resistance test
2.1 Substrate and pretreatment: Use standard steel beams as the substrate. After the rust is completely removed, perform anti-rust treatment according to the standard procedure. After the treatment is completed, apply the epoxy zinc-rich primer (two component).
2.2 Coating of the test piece: the first coating of 0.1mm thick fireproof coating, the second coating after 24 hours, following coating with interval of more than 16 hours and each coating thickness not exceeding 0.2mm until it reaches the specified thickness. Make sure that the previous coating has dried completely before applying the next coating. One coating cycle shall not be less than 14 days.
2.3 Testing thickness specification: (2.7±0.2) mm.
2.4 Curing time regulation: Curing for 70 days in a natural dry and ventilated environment (temperature 5-35°, humidity 50-80%), with a minimum curing period of not less than 60 days.