Mixtures of 1,1,1-trifluoroethane, perfluoropropane and propane, and their applications as refrigerant fluids, as aerosol propellants or as blowing agents for plastic foams
Assigneed'Elf Atochem S.A.
InventorsSylvie Macaudiere, Jean-Claude Tanguy
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Abstract
To replace chlorofluorocarbons as refrigerant fluids, the invention proposes to employ mixtures containing, on a mass basis, approximately 25 to 65% of 1,1,1-trifluoroethane, 1 to 70% of perfluoropropane and 5 to 34% of propane. The mixtures according to the invention can also be employed as aerosol propellants or as blowing agents for plastic foams.
Claims5
Mixture consisting essentially of, on a mass basis, about 35 to 59% of 1,1,1-trifluoroethane, about 10 to 53% of perfluoropropane and about 12 to 31% of propane, said mixture having a minimum boiling point of about -54.7.degree. C. at 1.013 bar.
Mixture consisting essentially of, on a mass basis, about 48% of 1,1,1-trifluoroethane, 30% of perfluoropropane and 22% of propane, said mixture being an azeotropic mixture with a minimum boiling point of about -54.7.degree. C. at 1.013 bar.
Dependencies are inferred from the claim text.