Manufacture of polyurethane foam

Details Manufacture of polyurethane foam Manufacture of polyurethane foam

C - Chemistry, Metallurgy

08

G

403/34, 403/45

C08G 18/00 (2006.01) C08G 18/08 (2006.01) C08G 18/48 (2006.01) C08G 18/50 (2006.01) C08G 18/72 (2006.01) C08G 18/76 (2006.01) C08G 18/78 (2006.01) C08J 9/08 (2006.01)

Patent

CA 1310791

E 34469 Abstract Manufacture of Polyurethane Foam Substantially water blown flexible polyurethane foams, based on methylene diphenyl isocyanates, having a density ranging from 15-45 kg/m3. Such foams may be obtained through a process substantially avoiding halocarbon blowing agents, which comprises reacting methylene diphenyl isocyanates with water and one or more isocyanate-reactive compounds selected from polyols and polyamines with a functionality of 2-4 and an average equivalent weight ranging from 750-5000, while the isocyanate index ranges from 10 to 60, and weight ratio of the isocyanate-reactive compound(s) to water is less than 20.

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