Effect of Matrix Resin on Performance of Waterborne Ultra-Thin Intumescent Fireproof Coatings
Ammonium polyphosphate(APP),pentaerythritol(PER)and melamine(MEL)were used as flame retardant systems in addition to titanium dioxide,zinc borate(ZB)and expandable graphite(EG)used as functional fillers to prepare the fireproof coatings.The effects of four matrix resins on the fire resistance and mechanical properties of fire-retardant coatings were studied.The thermal decomposition process of four matrix resins was analyzed,and the fire resistance,adhesion,flexibility and impact resistance of the four coatings were measured.The results show that the polyurethane coating has the longest fire resistance time.TGA analysis shows that the thermal decomposition temperature of polyurethane matches the carbonization and foaming temperatures of the intumescent flame-retardant system,and the fire resistance effect of the expanded carbon layer is better.Mechanical performance test shows that the polyurethane coating sample has the best adhesion,flexibility and impact resistance.
waterborne ultra-thin intumescent fire-retardant coatingmatrix resinintumescent flam-retardant system