Processability of PBT based nanocomposites with improved flame retardancy

Nanocomposites obtained by inclusion of small amounts of oxides (Al2O3, TiO2) in presence of a commercial phosphinate based additive were investigated in terms of flammability and processing behaviour. Experimental results showed the possibility to enhance fire safety of PBT applications without sacrificing its processability. In fact, lubricant actions seem to be verified in presence of metal oxide nanoparticles with reduction of melt pressure. Synergistic effects among fillers were also found resulting mainly in an increase of the flame performance of the matrix even considering a flame retardant content less than the half with respect with binary formulations having comparable fire behaviour.