Influence of titanium dioxide on the thermal insulation of fire protective paints

Titanium-dioxide is an inevitable ingredient that influences the properties and performance of intumescent paints. The aim of a study was to investigate the effect of TiO2 on the thermal insulation of waterborne intumescent paints to structural steel.

Influence of TiO2 on the thermal insulation of fire protective paints. Source: Pixabay -

Five intumescent formulae with different weight ratios of TiO2 to ammonium polyphosphate (APP), including paint without TiO2 as a control sample was prepared.

Ratio of ingredients influences performance

Thermal properties and thermal insulation performance of intumescent paints were measured by thermogravimetric analysis (TGA) and customised programmable furnace, respectively. The composition of char was analysed by using X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and inductively coupled plasma-optical emission spectroscopy (ICP-OES).

Results showed that ratio of both ingredients (TiO2 : APP) play a critical role on the performance of intumescent paints. It is suggested that ratio of slightly excess stoichiometric atomic ratio of titanium to phosphorus (Ti:P) exhibits better thermal insulation of intumescent paints.

The study is published in: Progress in Organic Coatings, Volume 111, October 2017, Pages 67-74

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