Fire-retardant polyurethane foam based on a bromine-containing polyester

A foamed insulating product comprising the reaction product of an organic isocyanate and a plurality of polyols, one of said plurality of polyols comprising the reaction product of a mixture comprising dibromoneopentyl glycol, an alkylene oxide and tetrabromophthalic acid or anhydride.

A foamed insulation product produced from an organic isocyanate and a plurality of polyols, one of said plurality being the reaction of a first polyol and a second different polyol, said first polyol comprising the reaction product of a mixture comprising dibromoneopentyl glycol, an alkylene oxide and tetrabromophthalic acid or anhydride, said reaction product being employed in an amount within the range of from about 4 to about 6 weight percent of the total weight of the reactants.

A foamed insulation product produced from an organic isocyanate, dimethyl phosphonate and a polyol comprising the reaction product of a mixture comprising dibromoneopentyl glycol, an alkylene oxide and tetrabromophthalic acid or anyhydride.