Study on the Properties of Flame Retardant Rigid Polyurethane Foam Materials

Flame-retardant rigid polyurethane foam was prepared using a one-step method of all-water foaming in this paper. Following an experimental investigation, the optimum water consumption was determined to be 1.4 g, the optimum addition of tin laurate catalyst was found to be 1 g, and the optimum value of isocyanate index was identified to be 1.1. The rigid polyurethane foam, which had been compounded with MEG, exhibited an oxygen index of 31% at a concentration of 25 wt% and a carbon residue of 34.9% at 570°C. In contrast, the rigid polyurethane foam compounded with MEG' exhibited a residual carbon of 39.3% at 570°C. Both methods demonstrated a notable enhancement in flame retardancy, although this was accompanied by a certain degree of reduction in compression properties. In comparison to the aforementioned methods, the rigid polyurethane foam compounded with MEG' has a less pronounced reduction in compression performance and a superior flame retardant effect.