Patent ID: 6800667
Filing Date: 2004-10-05
Classification: C08G,C08K

Abstract:
A process for producing a flexible polyurethane foam for use as mattress, upholstery, or carpet material, said process comprising the steps of:providing compounds which are reactive toward isocyanates; providing an isocyanate; providing at least one organic or inorganic acid anhydride; mixing the isocyanate and the organic or inorganic acid anhydride outside the presence of the compounds which are reactive toward isocyanates to form a mixture having the acid anhydride in an unreacted state; reacting the compounds and the mixture in the presence of at least one urethane forming catalyst selected from the group consisting of organic amines and organic metal compounds such that the acid anhydride remains in the unreacted state throughout the reaction of the compounds and the mixture to form the flexible polyurethane foam; and wherein the flexible polyurethane foam has a density of from 20 to 70 kg/m3 with the acid anhydride in the unreacted state capable of being hydrolyzed to prevent deterioration of the flexible polyurethane foam when exposed to hot or humid conditions.