Process for producing flexible polyurethane foam

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 18/48 (2006.01) C08G 18/40 (2006.01) C08G 18/65 (2006.01)

Patent

CA 2406114

A process for producing a flexible polyurethane foam satisfying low resilience, high vibration absorption, and high durability. A mixture comprising 95 to 50 wt.% polyoxyalkylene polyol produced with an alkali metal catalyst and 5 to 50 wt.% polyoxyalkylene polyol produced with a composite metal cyanide complex catalyst is reacted with a polyisocyanate compound in the presence of a catalyst and a foaming agent to produce a flexible polyurethane foam which has a resonance frequency of 3.7 Hz or lower, a resonance ratio of 3.5 or lower, and a resilience of 70% or lower.

L'invention concerne un procédé de production de mousse de polyuréthane flexible à faible élasticité, à haute capacité d'amortissement des vibrations, et de grande durabilité. Un mélange comprenant 95 à 50 % en poids de polyol de polyoxyalcoylène obtenu à l'aide d'un catalyseur métallique d'alcali et 5 à 50 % en poids d'un polyol de polyoxyalcoylène obtenu à l'aide d'un catalyseur complexe de cyanure de métal composite est mis en réaction avec un composé de polyisocyanate en présence d'un catalyseur et d'un agent moussant afin d'obtenir une mousse de polyuréthane flexible possédant une fréquence de résonance de 3,7 Hz ou moins, un rapport de résonance de 3, 5 ou moins, et une élasticité de 70 % ou moins.

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