Effect of the incorporation of organoclay and melamine cyanurate on the flame retardancy and mechanical property of polyurethane foam

The polyurethane composites were prepared by a one-pot free-rising method with Melamine cyanurate (MC) and Cloisite 20A additives. Flame-retardant and mechanical properties of the foams were investigated. The vertical burning test showed that PUF composite loading 15 wt% MC was reached V0 classification of V-rating. Limiting oxygen index (LOI) test revealed that the PU foam changed from an especially flammable material (LOI = 18.4 %) to a flame-resistant material (LOI = 24.1 %) upon adding 25 wt% MC. However, the presence of MC reduced the compressive strength of the foam. In this report, we demonstrated the incorporation of organoclay and MC into PUF could improve the flame retardancy and the compressive strength of polyurethane foam.