Method for preparing a flexible polyurethane foam
AssigneeRecticel
InventorsLucien Jourquin, Eddie Du Prez, Patrick Demeyer, Rudi Mortelmans
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Abstract
A method for preparing a flexible polyurethane foam, wherein a polyether-polyol having an average molecular weight from 1000 to 8000 and an average functionality not larger than 4, is brought into reaction with an organic polyisocyanate in the presence of a foam stabilizer, a catalyst and blowing agent comprising methylformate, wherein a cross-linker/extender and/or amine catalyst with delayed action is added to said reaction mixture.
Claims17
A method for preparing a flexible polyurethane foam wherein a polyether-polyol having an average molecular weight of from 1000 to 8000 and an average functionality not larger than 4 is reacted with an organic polyisocyanate in the presence of a foam stabilizer, a catalyst and a blowing agent comprising at least 50% methyl formate, wherein a cross-linker/extender in an amount of from 0.1 to 3 parts per 100 parts polyol and/or an amine catalyst with a delayed action is added to said reaction mixture comprising said components.
Dependencies are inferred from the claim text.