Intumescent coatings formulated with vegetable compounds
In this work, epoxy resin coatings were prepared with vegetable compounds (ginger powder and coffee husk) to act as a carbon source in the intumescent system. In addition, the possibility of using zinc phosphate (ZnP) and triphenyl phosphate (TPP) as flame retardants has been verified.
The characterisation of the coatings was performed through a fire resistance test, thermogravimetric analysis (TGA), Fourier transform infrared (FTIR), X-ray diffraction (XRD) and pyrolysis gas chromatography mass spectrometry (Py-GC–MS). Both vegetable compounds showed potential for application as a carbon source, decreasing the temperature of the substrate when compared to the blank condition. Coatings containing TPP show better behaviour as flame retardants and better expansion than ZnP. Py-GC–MS analysis shows the absence of toxic gases such as CN− and phosphine.
The study is published in: Progress in Organic Coatings, Volume 113, December 2017, Pages 47-59
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