International. Powder coatings have received attention because they do not contain solvents and the components have decorative and corrosion protection functions. However, the presence of polymers in its composition increases the risk of combustion in adverse situations.
In this context, a study aims to develop and characterize acrylic-based powder paints with the addition of montmorillonite clays (MMT) at 2% by weight and 4% by weight as Cloisite 30B (MMT-30B) and Cloisite 15A (MTT-15A) used as flame retardants.
The characterization of the coatings was performed by thermogravimetric analysis (TGA), X-ray diffraction and scanning electron microscopy. After the application of the coatings on carbon steel substrates, flammability tests were performed.
Coatings with 2% by weight of MMT-30B showed better overall results, especially in flammability tests. Flames spread less over these coatings than over the other systems. However, when surface and background temperatures were analyzed using the cone calorimeter test, samples prepared with 4% by weight of MMT-15A were considered safer to be applied in fire scenarios.
Source: http://onlinelibrary.wiley.com
