Synthesis and Characterization of Melamine Polyphosphate and its Flame Retardance

Abstract

The halogen free flame retardant additives always attract scientists for the research and applications due to its superior characteristics compared to the halogen based ones. Melamine polyphosphate (MPP) which contain both nitrogen and phosphorus can be prepared by two step method, the precipitation of melamine phosphate (MP) in aqueous mother liquor at room temperature, and the heat treatment of the intermediates into MPP at 340°C for 8 to 10 h. The MPP can be used as the flame retardant additives for various types of flammable materials such as paper, both as coatings and the blends or the epoxy composite. The flammable tests of the show that the prepared specimens suppresses the flame when the content of MPP is higher than 5%, and the grades of HB and V-1 to V-0, the limiting oxygen indices of 32% to 35% are obtained.