Azeotropic and azeotrope-like compositions of a hydrofluorocarbon and a hydrocarbon
AssigneeE. I. Du Pont de Nemours and Company
InventorsBrooks Shawn Lunger, Glenn Scott Shealy
Life of this patent
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Abstract
This invention relates to compositions that include at least one hydrocarbon and at least one fluorinated species. Such compositions may be used as refrigerants, cleaning agents, expansion agents for foams such as polyolefins and polyurethanes, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, power cycle working fluids, polymerization media, particulate removal fluids, carrier fluids, buffing abrasive agents, displacement drying agents, among others.
Claims4
A non-flammable azeotrope or azeotrope-like composition consisting essentially of at least about 95% to about 99.9% by weight trifluoromethane and at least about 0.1% to less than about 5% by weight propane, wherein the vapor pressure of said composition is at least 363 psia at 0.degree. C.
Dependencies are inferred from the claim text.