Process for making visco-elastic foams

Details Process for making visco-elastic foams Process for making visco-elastic foams

C - Chemistry, Metallurgy

08

G

C08G 18/36 (2006.01) C08G 18/66 (2006.01)

Patent

CA 2655532

Process for making a slabstock, visco-elastic, flexible, polyurethane foam which process comprises reacting a polyisocyanate and a polyol at an index of 60 -95 and using a blowing agent, wherein 5-50 and preferably 10-40 % by weight of the polyol used is castor oil. The foams and a polyol composition are claimed as well.

L'invention concerne un procédé de fabrication d'une feuille de mousse de polyuréthane souple viscoélastique. Ce procédé consiste à faire réagir un polyisocyanate et un polyol à un indice compris entre 60 et 95 et à utiliser un agent d'expansion, entre 5% et 50%, de préférence entre 10% et 40%, en poids du polyol utilisé étant de l'huile de ricin. Les mousses et une composition de polyol font également l'objet des revendications.

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