Abstract: The dispersion state of nano-TiO2 particles was studied by using transmission electron microscopy (TEM) and fourier transform infrared spectroscopy (FT-IR). Nanoparticles can be fully dispersed by specific hyper-dispersant. The improvement of nano-TiO2 in thermal behavior and flame retardation of acrylic resin and fire-resistant coating was investigated by limiting oxygen index (LOI), thermogravimetry (TG) and fire protection test. Combination of nano-TiO2 and intumescent flame-retardant system (IFR) can greatly improve the thermal stability and flame retardation of acrylic polymer, and nano-TiO2 is helpful for enhancing the anti-oxidation and fire protection properties of fire-resistant coating.

Key words: Nano-TiO2, Fire-resistant coating, Thermal behavior, Fire protection properties