Patent ID: 8076385

Claim:
A process for producing a flame retardant polyurethane foam, comprising the steps of: providing a mixture comprising a flame retardant aqueous liquid composition, a polyol and an isocyanate; and reacting said mixture in the presence of a catalyst; wherein the flame retardant aqueous liquid composition comprises water, guanidine sulfamate dissolved in the water, a citric acid compound comprising a metal salt of citric acid dissolved in the water, and a water soluble polymer dissolved in the water; and wherein the water soluble polymer is at least one polymer selected from the group consisting of cellulose-based water soluble organic polymers, water soluble vinyl polymers, polyoxyethylene-based water soluble organic polymers, water soluble polyoxyethylene-polyoxypropylene copolymers, water soluble acrylic polymers, water soluble urethane polymers, gum arabic, gum tagacanth, arabinogalactan, locust bean gum, guar gum, gum karaya, carageenan, pectin, agar, guince seed, starch, algae colloid, trant gum, xanthan gum, dextran, succinoglucan, pullulan, collagen, casein, albumin, gelatin, carboxymethyl starch, methylhydroxypropyl starch, sodium alginate and propylene glycol alginate.