Process for manufacture of flexible polyurethane foams with cyan

Details Process for manufacture of flexible polyurethane foams with cyan Process for manufacture of flexible polyurethane foams with cyan

1979-04-10

1981-03-24

Welsh, Maurice J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521128, 521131, 521160, C08G 1814

Patent

active

042581419

ABSTRACT:
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, dicyandiamide, guanidine, biguanidine, melamine, cyanuric alkyl esterhydrazides 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.

REFERENCES:
patent: 3833525 (1974-09-01), Orlando et al.
patent: 3897372 (1975-07-01), Kehr et al.
patent: 4075137 (1978-02-01), Sawachika et al.
patent: 4139501 (1979-02-01), Rudner et al.
Hackh's Chemical Dictionary, McGraw-Hill, N.Y., 1944, p. 245.
Argabright, J. Org. Chem., vol. 35, 1970, p. 2253.

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