Low-smoke generating polyurethane foam

A flame-retardant, smoke-inhibited polyurethane foam having incorporated therein a flame-retardant and smoke-inhibiting composition comprising in combination a halogen-containing, fire-retardant organic material in an amount sufficient to render the final foam selfextinguishing and a smoke-inhibiting amount of at least one metallic salt of acid functionality of the formula

• [R(CO.sub.2).sub.n ].sub.m A
• wherein R is ##STR4## wherein R.sub.1 and R.sub.2 are carboxylate and R.sub.3 and R.sub.4 are independently selected from the group consisting essentially of hydrogen and carboxylate with at least one being carboxylate;
• A is a metal selected from the Periodic Table Group I, II, III or IV;
• n is 2, 3, or 4;
• and m is 1/2, 1, 2, 3, or 4.

A process for producing flame-retardant, smoke-inhibited polyurethane foam which comprises reacting at ambient temperatures and without the addition of external heat or pressure to the reaction system

• a. at least one metallic salt of an aromatic polycarboxylic acid free of acid functionality of the formula
• [R(CO.sub.2).sub.n ].sub.m A
• wherein R is ##STR5## wherein R.sub.1 is carboxylate and R.sub.2, R.sub.3 and R.sub.4 are independently selected from the group consisting essentially of hydrogen and carboxylate with at least one being carboxylate and Y is a bridging group selected from the group consisting of C.sub.1 -c.sub.6 alkylene, carbonyl, sulfonyl and oxygen;
• A is a metal selected from the Periodic Table Group I, II, III, or IV;
• n is 2, 3, or 4;
• and m is 1/2, 1, 2, 3, or 4;
• b. a polymeric aryl polyisocyanate having a functionality greater than 2 and containing at least two aromatic rings, said aromatic rings substituted with at least one isocyanato group;
• and
• c. a polyol composition formed from the mixture of an organic polyol of a molecular weight less than 2000 and having at least three hydroxyl groups per molecule and an organic halogen-containing polyol wherein the ratio of said organic polyol-organic halogen-containing polyol is 0:1 to 1:1 and the ratio of NCO:OH in said reaction system is 0.9:1 to 1.05:1.

A process for producing a flame-retardant, smoke-inhibited polyurethane foam having incorporated therein a flame-retardant and smoke-inhibiting composition comprising in combination a halogen-containing, fire-retardant organic material in an amount sufficient to render the final foam self-extinguishing and a smoke-inhibiting amount of at least one metallic salt of acid functionality of the formula

• [R(CO.sub.2).sub.n ].sub.m A
• wherein R is ##STR6## wherein R.sub.1 and R.sub.2 are carboxylate and R.sub.3 and R.sub.4 are independently selected from the group consisting essentially of hydrogen and carboxylate with at least one being carboxylate;
• A is a metal selected from the Periodic Table Group I, II, III or IV;
• n is 2, 3, or 4;
• and m is 1/2, 1, 2, 3, or 4.