Process for manufacture of flexible polyurethane foams with cyanic acid derivatives

摘要: The invention concerns a process for the manufacture of flame resistant flexible polyurethane foams by reacting mixture diphenylmethane diisocyanates and polyphenylene polymethylene polyisocyanates having functionality greater than 2 containing 40 to 90 percent weight diisocyanate based on total said mixture; polyols, cyanic acid derivatives such as cyanamide, dicyandiamide, guanidine, biguanidine, melamine, cyanuric alkyl esterhydrazides -amides inhibitors, blowing agents; well as, possibly, chain extenders other additives. are suited familiar areas applications, but especially sound-insulation material construction industry.