Influence of different phosphorus flame retardants on fire hehaviour of rigid polyurethane foams blown with pentane

摘要

The thermal stability and fire behaviour of a series of modified polyurethane foams has been studied by means of small-scale tests (spread of flame, oxygen index), thermogravimetric analyses and with the help of a cone calorimetr. These foams were prepared with three different flame retardants: poly(ammonium phosphate), diethyl N,N-bis(2-hydroxyethyl)amino-methyl phosphonate and triethyl phosphate. The addition of the flame retardants was limited because of worsening of the physical properties of the foams. The effect of flammability reducing is discussed with respect to the content of phosphorus in the flame retardants.