Flexible polyurethane foams from polymethylene polyphenyl...

Details Flexible polyurethane foams from polymethylene polyphenyl... Flexible polyurethane foams from polymethylene polyphenyl...

C - Chemistry, Metallurgy

08

G

403/41, 403/45

C08G 18/10 (2006.01) C08G 18/48 (2006.01) C08G 18/76 (2006.01) C08G 18/14 (1985.01)

Patent

CA 1196149

Abstract of the Disclosure Flexible polyurethane foams are made from isocyanate containing prepolymers where the isocyanate is a mixture of diphenylmethane diisocyanate (MDI) and polymeric forms of MDI. The isocyanate mixture has a functionality greater than 2Ø The prepolymer is an isocyanate capped polyol or mixture of polyols where the polyols are diols or triols having at least 50% by weight oxyethylene groups. The foams are made by reacting water with the prepolymer and fire retardant materials can be added to the reaction mixture to produce fire retardant foams. The foams have improved physical properties and flammability resistance.

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