Process for making polyurethane integral skin foams

Details Process for making polyurethane integral skin foams Process for making polyurethane integral skin foams

C - Chemistry, Metallurgy

08

J

C08J 9/14 (2006.01) C08J 9/34 (2006.01)

Patent

CA 2429868

Process for preparing polyurethane integral skin foams using a blowing agent mixture that contains or consists of 50 to 99 % by weight of 1,1,1,3,3- pentafluorobutane (HFC 365mfc) and 1 to 50 % by weight of at least one fluorinated hydrocarbon selected from the group consisting of 1,1,1,2- tetrafluoroethane (HFC 134a), 1,1,1,3,3-pentafluoropropane (HFC 245fa), 1,1,1,3,3,3-hexafluoropropane and 1,1,1,2,3,3,3-heptafluoropropane (HFC 227ea).

La présente invention concerne un procédé de préparation de mousses polyuréthanes à peau intégrée à l'aide d'un mélange d'agents d'expansion qui contient ou comprend 50 à 99 % en poids de 1,1,1,3,3-pentafluorobutane (HFC 365mfc) et 1 à 50 % en poids d'au moins un hydrocarbure fluoré sélectionné dans le groupe qui comprend 1,1,1,2-tétrafluoroéthane (HFC 134a), 1,1,1,3,3-pentafluoropropane (HFC 245fa), 1,1,1,3,3,3-hexafluoropropane et 1,1,1,2,3,3,3-heptafluoropropane (HFC 227ea).

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