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THE PERFORMANCE OF EXPANSIVE HIGH-TEMPERATURE RESISTANT FIREPROOF COATINGS MAINLY LIES IN THE FOLLOWING ASPECTS:

Expands upon encountering fire, forming an efficient heat insulation layer: This is its core performance. When the coating is exposed to fire, the internal flame retardants and foaming components react rapidly, causing the volume to expand by 5 times to 20 times or even more; for instance, a certain product can expand 20 times when 0.6mm thick upon encountering fire, forming a dense carbonized layer or ceramic layer. This expanded layer can effectively isolate heat and oxygen, slowing down the temperature rise of the substrate. Outstanding high-temperature resistance and heat insulation properties: High-quality expansive coatings can withstand extremely high flame temperatures. For example, a certain product can keep the back temperature no higher than 200℃ within 5 minutes when exposed to a 1000℃ flame; another study shows that at 850℃ flame for 15 minutes, the cold surface temperature is only 122.3℃. Some special coatings can even have a temperature resistance limit of up to 2000℃. The porous or vacuum structure formed after expansion has an extremely low thermal conductivity (such as up to 0.022W/m.K), resulting in remarkable heat insulation effects.