Process for the production of polyurethane foams

Details Process for the production of polyurethane foams Process for the production of polyurethane foams

C - Chemistry, Metallurgy

08

G

403/36, 403/41

C08G 18/48 (2006.01) C08G 18/10 (2006.01)

Patent

CA 1095648

ABSTRACT OF THE DISCLOSURE Soft, flexible polyurethane foam is made by catalysed condensation of a first polyol polyether containing a major proportion of ethylene oxide units, with a polyisocyanate and a second polyol polyether containing no or a minor proportion of ethylene oxide units, in the presence of moisture. The first polyol has a primary hydroxyl content, based on total hydroxyl, of 2-35%. The second polyol is first condensed with the polyisocyanate to a prepolymer of 15-40% free isocyanate content.

274090

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