The origin and nature of flame retardance in ethylene-vinyl acetate copolymers containing hostaflam AP 750

Abstract

The aim of the study is to investigate new intumescent materials based on ethylene-vinyl acetate copolymers. Hostaflam AP 750 is used as a flame-retardant system. Fire testing and thermal analyses have shown that the incorporation of AP 750 leads to the formation of an intumescent coating which provides good fire barrier properties. Spectrochemical analyses have shown that the coating consists of polyethylenic chains issued from the polymer. Polyaromatic structures and phosphorus oxides are also observed in the coating. © 1999 Society of Chemical Industry