Production of flexible polyurethane foams

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 18/72 (2006.01) C08G 18/40 (2006.01) C08G 18/48 (2006.01) C08G 18/63 (2006.01) C08G 18/68 (2006.01) C08J 9/228 (2006.01)

Patent

CA 2376345

The present invention relates to a process for the production of flexible polyurethane foams by reaction of a) at least one compound having at least two isocyanate-reactive hydrogen atoms, with b) polyisocyanates, wherein the compund used as said Compound having at least two isocyanate-reactive hydrogen atoms a) comprises at least one block polyoxypropylene/polyoxyethylene/polyol having a hydroxyl value of from 25 to 45 mg KOH/g and a content of terminally bound ethylene oxide units of from 15 to 17 wt-%, based on the total amount of the alkylene oxide, obtained by attachment of ethylene oxide and propylene oxide to an initiator having an average functionality of 3.

La présente invention a pour objet un procédé de production de mousses de polyuréthane souples par réaction a) d'au moins un composé comportant au moins deux atomes d'hydrogène réagissant avec un isocyanate et b) des polyisocyanates, le composé utilisé à titre de composé comportant au moins deux atomes d'hydrogène réagissant avec un isocyanate a) comprenant au moins une séquence polyoxypropylène/polyoxyéthylène/polyol ayant un indice d'hydroxyle de 25 à 45 mg KOH/g et une teneur en terminaisons oxyde d'éthylène de 15 à 17 % en poids basée sur la quantité totale d'oxyde d'alkylène, obtenu par fixation de l'oxyde d'éthylène et l'oxyde de propylène à une amorce ayant une fonctionnalité moyenne de 3.

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