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US 5,653,908 AGranted
Octafluorobutane compositions
AssigneeE. I. Du Pont de Nemours and Company
InventorBarbara Haviland Minor
Life of this patent
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AssigneeE. I. Du Pont de Nemours and Company
InventorBarbara Haviland Minor
Estimating the term…
The invention includes compositions of 1,2,2,3,3,4,4,4-octafluorobutane and bis(fluoromethyl) ether, 2,2,4,4-tetrafluorooxetane, 2,2,3,3-tetrafluorooxetane, 1-difluoromethoxy-1,1,2,2-tetrafluoroethane, 1-difluoromethoxy-1,2,2,2-tetrafluoroethane, 2,2,3,3,4,5,5-heptafluorotetrahydrofuran or 2,2,3,3,4,4,5-heptafluorotetrahydrofuran; 1,1,1,2,3,4,4,4-octafluorobutane and bis(fluoromethyl) ether, 2,2,4,4-tetrafluorooxetane, 2,2,3,3-tetrafluorooxetane, 1-difluoromethoxy-1,1,2,2-tetrafluoroethane, 1-difluoromethoxy-1,2,2,2-tetrafluoroethane, 2,2,3,3,4,5,5-heptafluorotetrahydrofuran, or 2,2,3,3,4,4,5-heptafluorotetrahydrofuran; 1,1,1,2,2,4,4,4-octafluorobutane and bis(fluoromethyl) ether, 2,2,4,4-tetrafluorooxetane or 2,2,3,3-tetrafluorooxetane; or 1,1,2,2,3,3,4,4-octafluorobutane and methyl tert-butyl ether, bis(fluoromethyl) ether or 1,1,1,2,2,3,3-heptafluoro-3-(1,2,2,2-tetrafluoroethoxy)propane. These compositions, which may be azeotropic or azeotrope-like, may be used as refrigerants, cleaning agents, expansion agents for polyolefins and polyurethanes, aerosol propellants, refrigerants, heat transfer media, gaseous dielectrics, fire extinguishing agents, power cycle working fluids, polymerization media, particulate removal fluids, carrier fluids, buffing abrasive agents or displacement drying agents.
An azeotropic or azeotrope-like composition consisting essentially of about 47-99 weight percent 1,2,2,3,3,4,4,4-octafluorobutane and about 1-53 weight percent bis(fluoromethyl) ether, wherein at about 25.degree. C., the vapor pressure of the composition is higher than the vapor pressure of the individual components and wherein when the temperature has been adjusted to about 25.degree. C., the change in vapor pressure of the composition is less than about 10 percent, after 50 percent of the composition has been evaporated.
An azeotropic or azetrope-like composition consisting essentially of about 47-99 weight percent 1,1,1,2,3,4,4,4-octafluorobutane and about 1-53 weight percent bis(fluoromethyl) ether, wherein at about 25.degree. C., the vapor pressure of the composition is higher than the vapor pressure of the individual components and wherein when the temperature has been adjusted to about 25.degree. C., the change in vapor pressure of the composition is less than about 10 percent, after 50 percent of the composition has been evaporated.
An azeotropic or azeotrope-like composition consisting essentially of about 52-99 weight percent 1,1,1,2,2,4,4,4-octafluorobutane and about 1-48 weight percent bis(fluoromethyl) ether, wherein at about 25.degree. C., the vapor pressure of the composition is higher than the vapor pressure of the individual components and wherein when the temperature has been adjusted to about 25.degree. C., the change in vapor pressure of the composition is less than about 10 percent, after 50 percent of the composition has been evaporated.
Dependencies are inferred from the claim text.