Method for producing flame retardant flexible polyurethane foams with blends of dibromoneopentyl glycol and flame retardant plasticizer

Abstract From the Canadian patent

This invention is directed to a process for producing flame retardant flexible polyurethane foams having a porosity generally in the range between 0.5 and 10 cubic feet per minute. A polyol having an average molecular weight between about 250 and about 6,500 preferably about, 3,500 to 6,500, is reacted with a polyisocyanate such as, toluene diisocyanate, which comprises a mixture of 2.4- and 2.6-toluene diisocyanate isomers. The formulation of the present invention includes a flame retardant mixture of a plasticizer and ?ibromoneopentyl glycol. The plasticizer is either a halogented phosphonate or halogenated phosphate ester. Chlorine is the preferred halogen atom. The weight ratio of those …