Development of photoluminescent powder coatings by UV curing process

The use of thermal curing powder coatings have obtained a wide acceptance, but is limited to the metal substrates applications, because they need high temperatures for the film curing. Safety sings in edifications use, generally, PVC substrates, that are unable to support typically curing temperatures (150–200 °C). In order to prepare a photoluminescent powder coating by UV curing process, an experimental technique was development and the influence of some preparative conditions were studied. To achieve the better results, photoluminescent pigment percentage, conditions of ultra-centrifugal mill and thickness of deposition coating were varied in order to increase the luminance decay time.