Process for the manufacture of flexible polyurethane foams...

Details Process for the manufacture of flexible polyurethane foams... Process for the manufacture of flexible polyurethane foams...

C - Chemistry, Metallurgy

08

K

403/31, 403/44

C08K 5/34 (2006.01) C08G 18/38 (2006.01) C08G 18/76 (2006.01) C08J 9/00 (2006.01) C08K 5/29 (2006.01)

Patent

CA 1136349

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

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