PIN FR reduces smoke emission of acrylic resin
Acrylic resin is often used as a component of intumescent coating systems. In this study, the smoke emission from a typical such system (12% acrylic resin, 50% phosphorus carbon nitrogen intumescent, 13% titanium dioxide pigment and 25% solvent which evaporates away after application) was studied in detail.
Smoke density of a 2 mm coating was studied using ASTM E 662 static smoke evaluation and TGA (thermogravimetric analysis). Pure acrylic resin showed a significantly higher smoke density and (nearly 2x higher) total smoke emission compared to the intumescent coating (calculated per litre product applied). The resin (12% of the content) generates nearly 35% of the total smoke from the intumescent coating.
“Smoke density evaluation of acrylic resin and intumescent flame retardant coatings”, Z. Li et al., Pigment & Resin Technology, Vol. 45 Issue: 2, pp.86-92, https://doi.org/10.1108/PRT-03-2014-0023