Thermogravimetry (TG), thermogravimetry coupled with mass spectroscopy (TG-MS) and thermogravimetry coupled with Fourier transform
infrared spectroscopy (TG-FTIR) were used to characterise the thermo-oxidative behaviour of two intumescent coating materials.
The temperature dependence, the corresponding volatile products and the amount of residue of the different processes were
determined. Using both TG-MS and TG-FTIR results in an unambiguous interpretation of the volatile products. Characteristics
such as the influence of endothermic reactions, the release of non-flammable gases, the dehydrogenation enhancing the char
formation and the stability of the cellular char were discussed in detail. It was demonstrated, that TG, TG-MS and TG-FTIR
are powerful methods to investigate mechanisms in intumescent coatings and that they are suitable methods in respect to quality
assurance and unambiguous identification of such materials.