Polyurethane foam containing flame retardant blend of non-oligomeric and oligomeric flame retardants
A polyurethane foam can be flame retarded by the incorporation therein of a flame retardant blend that comprises: (a) a non-oligomeric non-halogenated organophosphorus flame retardant (e.g., a phosphate ester) that is adapted for use in a polyurethane foam formulation; and (b) an oligomeric organophosphorus flame retardant (e.g., a phosphate ester) having a phosphorus content of no less than about 10%, by weight, and at least three phosphate ester units therein.
1. A polyurethane foam consisting essentially of a polyurethane foam and an effective amount for flame retardancy of a flame retardant blend consisting essentially of: (a) 50 percent by weight, of the blend, of butylated triphenyl phosphate and (b) 50 percent by weight, of the blend, of poly(ethylethyleneoxy) phosphate.