Composition: It is composed of water-based resin, pentaerythritol, melamine, ammonium polyphosphate, titanium dioxide, and water.
Fire resistance limit: 2—2.5h.
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. Do not paint directly on the metal surface.
Performance introduction: Indoor water-based thin steel structure fireproof coating, using water as a diluent, no organic solvent, non-toxic, non-irritating odor, harmless to human body, and no pollution to the environment. It is a product encouraged by the National Development and Reform Commission. When the steel structure is exposed to flame or high temperature, the fireproof coating can generate a uniformly air-tight foam insulation layer which can block heat source influence on the substrate for certain time, delaying the collapse time of the steel structure, preventing the spread of fire to ensure the safe escape of personnel.
Theoretical dosage: 6-7㎏/㎡ (calculated based on 4mm dry film, excluding loss)
Specific gravity: about 1.20
Drying time: 25℃ surface dry ≤8h, actual dry ≤24h
Coating method: spraying, scraping.
Coating interval: 24 hours and above at 25°C.
Surface treatment: Perform necessary surface treatment on the work piece before application. Remove rust, dust, grease (at holes, gaps) and fill the putty. After the putty dries, polish it smoothly before applying the fireproof coating.
Supporting coating: previous coating is epoxy zinc-rich primer.
1. It is strictly forbidden to paint directly on steel and other metal surfaces. Otherwise it will cause flash rust. A primer, such as alkyd anti-rust paint, epoxy zinc-rich primer, etc., needs to be coated before this application. Mix the paint thoroughly before application.
2. The viscosity of the paint should be appropriate to prevent sagging and falling during spraying. If the paint is thick, it can be diluted with water and adjusted evenly, dosage not exceeding 10%. During the application process and after the application, before the coating is dried and solidified, the ambient temperature should be 5～35℃, the relative humidity ≤85%, air in good ventilation. No other paint can be applied on top of this paint.
3. The thickness of the fire retardant coating should not be less than 6 mm. If the fire resistance time does not meet the standard due to thickness short, we are not held responsible.
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: The coating thickness is (4.0±0.2) mm except for surface dry testing. The thickness of the surface dry test should not exceed 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 (double).
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: (4.0±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.