2. Commercial phosphorus flame retardants for polymeric materials

Ammonium polyphosphate for the treatment of cellulose materials (textiles, wood, etc.) has been around for almost three centuries. However, with the advent of synthetic polymers in the 20th century, organophosphorus compounds became an important class of flame retardants. Finally, in recent years, for health and environmental reasons, new regulations such as REACH have restricted or banned the use of certain halogenated systems, thus increasing the interest in phosphorus flame retardants