Abstract: The effects of an intumescent flame retardant (IFR) on flame retardant, melt flow rate, and mechanical propeties of POM were studied. When the weight ratios of POM/red phosphorus/PURT/MCA were 65/20/10/5, the material was selfextinguished, leaving a compact layer of carbon layer, with least reduction of mechanical properties and processability. When a compatibilizer KT3 was introduced, the mechanical properties were further improved.

Key words: polyoxymethylene, flame retardant, compatibilizer, red phosphorus, intumescent flame retardant