Flame retardant blend for intumescent flexible polyurethane foam

摘要

A flame and dripping ember retardant blend, for use in a polyurethane foam, comprises: (a) a predominant amount of a blend of (i) a major amount of an oligomeric halogenated organophosphorus flame retardant and (ii) a minor amount of a monomeric halogenated organophosphorus flame retardant; (b) a water or alcohol soluble urea-formaldehyde resin; and (c) a dialkyl-N,N-bis (hydroxyalkyl) aminomethylphosphonate.