The Effects of Fire Retardants on the Combustion of Rigid-Urethane Foams,

摘要

A study was undertaken in the Flammability Research Center of the University of Utah to determine the parameters which govern the smoke emission characteristics of rigid-urethane foams. Special emphasis was directed toward an understanding of the chemical and physical parameters governing the smoking tendency and light obscuration during the combustion process,and the effect of fire retardants in terms of type and concentration. Three fire retardants,typical of reactive and non-reactive systems used in commerce,were selected for incorporation into a rigid urethane. There is some improvement in resistance to ignition,flame penetration,and flame propagation,with the brominated retardant being generally superior in concentrations of at least 12%.