Novel polyurethane foam composition having improved flex...

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 18/10 (2006.01) C08G 18/48 (2006.01) C08G 18/66 (2006.01)

Patent

CA 2299262

The present invention relates to a process for preparing a flexible polyurethane foam from the reaction of a polyisocyanate composition prepared from the reaction of an excess of organic polyisocyanate and a polyether polyol having a high ethylene oxide content and an isocyanate reactive composition comprising a chain extending agent and a combination of a polyether polyol having a high ethylene oxide content and a random copolymer having a high ethylene oxide content, and the product prepared therefrom.

La présente invention concerne un procédé pour préparer une mousse de polyuréthane flexible. Ce procédé consiste à faire réagir une composition de polyisocyanate préparée en faisant réagir un excédent de polyisocyanate organique et un polyol de polyéther, et présentant une forte teneur en oxyde d'éthylène, avec une composition réactive d'isocyanate. Cette dernière comprend un allongeur de chaîne et une combinaison d'un polyol de polyéther présentant une teneur en oxyde d'éthylène élevée, et un copolymère aléatoire présentant également une teneur en oxyde d'éthylène élevée. L'invention concerne aussi un produit ainsi préparé.

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