Thermal and fire resistance of luminescent coating on a base of silicon elastomer with diatomaceous biosilica filler

Abstract

Based on the transparent in UV-range silicon SKTN-med elastomer with a noted filler (2 and 5 w.% of Diatomaceous Biosilica), heat- and fire-retardant protective coatings were obtained. Samples exhibit strong green fluorescence at λem = 530 nm, which is excited by UV-light at λex = 265 nm. Standard fire tests showed ignition time of ~200 s vs. 120 s for unfilled samples. It should be noted that weight of composition with filler decrease compare to pure SKTN-med due to small density of Diatomaceous Biosilica powder. This circumstance favorably distinguishes a promising filler from traditional ones.