Flexible, combustion-modified, polyurethane foams

Details Flexible, combustion-modified, polyurethane foams Flexible, combustion-modified, polyurethane foams

C - Chemistry, Metallurgy

08

L

C08L 75/08 (2006.01) C08G 18/38 (2006.01) C08G 18/48 (2006.01) C08G 18/76 (2006.01) C08J 9/04 (2006.01) C08K 5/3492 (2006.01) C08K 5/51 (2006.01)

Patent

CA 2093885

Polyurethane foams of excellent properties are produced by reacting a) one or more polyether polyols, b) a polymethylene poly(phenyl isocyanate) having a methylene-bis(phenyl isocyanate) content of from 70 to 77% by weight, c) melamine, d) a phosphorous containing compound and d) water as the blowing agent. The isocyanate must have a specific 4,4' to 2,4'-isomer ratio and the amounts of melamine and phosphorous must be within narrowly defined limits.

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