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US 5,626,790 AGranted
Refrigerant compositions including 1,1,2-trifluoroethane and hexafluoropropane
AssigneeE. I. Du Pont de Nemours and Company
InventorBarbara H. Minor
Life of this patent
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AssigneeE. I. Du Pont de Nemours and Company
InventorBarbara H. Minor
Estimating the term…
Refrigerant compositions include mixtures of 1,1,2-trifluoroethane and a second component wherein the second component is (CF.sub.3).sub.2 NF, (CF.sub.3).sub.3 N, N(CHF.sub.2).sub.2 (CF.sub.3), N(CH.sub.2 F)(CF.sub.3).sub.2, SF.sub.5 CF.sub.2 H.sub.5, SF.sub.5 C.sub.2 F.sub.5, HFC-236ca, HFC-236cb, HFC-236ea, HFC-254cb, HFC-254eb, HFC-263fb, HFC-272ca, HFC-281ea, HFC-281fa, HFC-338mf, HFC-4310mee, butane, cyclopropane, isobutane or propane. Except for FIG. 7, the invention also relates to azeotropic or azeotrope-like compositions which comprise admixtures of effective amounts of 1,1,2-trifluoroethane and (CF.sub.3).sub.2 NF, (CF.sub.3).sub.3 N, N(CHF.sub.2).sub.2 (CF.sub.3), N(CH.sub.2 F)(CF.sub.3).sub.2, SF.sub.5 CF.sub.2 H, SF.sub.5 C.sub.2 F.sub.5, HFC-236ca, HFC-236cb, HFC-236ea, HFC-254cb, HFC-254eb, HFC-263fb, HFC-272ca, HFC-281ea, HFC-281fa, HFC-338mf, HFC-4310mee, butane, cyclopropane, isobutane or propane to form an azeotropic or azeotrope-like composition.
A composition consisting essentially of an azeotropic or azeotrope-like composition consisting of 1-99 weight percent 1,1,2-trifluoroethane and 99-1 weight percent of a hexafluoropropane selected from the group consisting of 1,1,2,2,3,3-hexafluoropropane, 1,1,1,2,2,3-hexafluoropropane and 1,1,2,3,3,3-hexafluoropropane wherein when the temperature has been adjusted to about 25.degree. C., said composition has an initial vapor pressure of about 24.9 to about 33.3 psia, and, the vapor pressure of said composition changes no more than 3 percent after 50 percent of the initial composition has been evaporated.
Dependencies are inferred from the claim text.