Foam-forming compositions containing azeotropic or...

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 18/48 (2006.01) C08G 18/76 (2006.01) C08J 9/14 (2006.01) C08L 75/04 (2006.01)

Patent

CA 2708274

Foam-forming compositions containing azeotropic or azeotrope-like mixtures containing cis-1,1,1,4,4,4-hexafluoro-2-butene are disclosed. The foam-forming composition contains (a) an azeotropic or azeotrope-like mixture of cis-1,1,1,4,4,4--hexafluoro-2-butene with methyl formate, 1,1,1,3,3-pentafluorobutane, trans-1,2-dichloroethylene, pentane, isopentane, cyclopentane, HFC-245fa, or dimethoxymethane; and (b) an active hydrogen-containing compound having two or more active hydrogens. Also disclosed is a closed-cell polyurethane or polyisocyanurate polymer foam prepared from reaction of an effective amount of the foam-forming composition with a suitable polyisocyanate. Also disclosed is a process for producing a closed-cell polyurethane or polyisocyanurate polymer foam by reacting an effective amount of the foam- forming composition with a suitable polyisocyanate.

La présente invention concerne des compositions moussantes contenant des mélanges azéotropiques ou de type azéotropique contenant du cis-1,1,1,4,4,4-hexafluoro-2-butène. La composition moussante contient (a) un mélange azéotropique ou de type azéotropique de cis-1,1,1,4,4,4-hexafluoro-2-butène avec du formiate de méthyle, du 1,1,1,3,3-pentafluorobutane, du trans-1,2-dichloroéthylène, du pentane, de l'isopentane, du cyclopentane, du HFC-245fa, ou du diméthoxyméthane ; et (b) un composé contenant de l'hydrogène actif ayant deux atomes d'hydrogène actif ou plus. L'invention concerne également une mousse de polyuréthane ou de polyisocyanurate à alvéoles fermé préparée à partir de la réaction entre une quantité efficace de la composition moussante et un polyisocyanate approprié. L'invention concerne également un procédé de production d'une mousse de polyuréthane ou de polyisocyanurate à alvéoles fermés par mise en réaction d'une quantité efficace de la composition moussante avec un polyisocyanate approprié.

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