Process for the preparation of molded polyurethane foams and...

Details Process for the preparation of molded polyurethane foams and... Process for the preparation of molded polyurethane foams and...

C - Chemistry, Metallurgy

08

J

18/679

C08J 9/08 (2006.01) C08G 18/32 (2006.01)

Patent

CA 2027670

Mo-3464 LeA 27,266 A PROCESS FOR THE PREPARATION OF MOLDED POLYURETHANE FOAMS AND THE MOLDED FOAMS OBTAINED BY THIS PROCESS ABSTRACT OF THE DISCLOSURE This invention relates to a process for the preparation of molded polyurethane foams having a compact skin and having a density of at least 250 kg/m3 comprising in-mold foaming at an isocyanate index of 75 to 1500 a reaction mixture of (a) a polyisocyanate component containing at least one aromatic polyisocyanate, (b) an isocyanate-reactive component containing at least one organic polyhydroxyl compound, (c) a blowing agent comprising a salt of (i) an organic carboxylic acid and (ii) a nitrogen base containing at least one N-H bond, with the proviso that the blowing agent (c) cannot be a compound formed in situ by interaction of the organic carboxylic acid with a difunctional or polyfunctional amine. Mo-3464

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