Back to results
US 5,064,559 AGranted
Binary azeotropic compositions of (CF.sub.3 CHFCHFCF.sub.2 CF.sub.3) with methanol or ethanol or isopropanol
AssigneeE. I. Du Pont de Nemours and Company
InventorsAbid N. Merchant, Carl G. Krespan
Life of this patent
Estimating the term…
Abstract
Azeotropic mixtures of 1,1,1,2,3,4,4,5,5,5-decafluoropentane and methanol or ethanol or isopropanol, the azeotropic mixtures being useful in solvent cleaning applications, as blowing agents, refrigerants, heating mediums and aerosol propellants.
Claims17
An azeotropic composition consisting essentially of:
- (a) 89.0-99.0 weight percent 1,1,1,2,3,4,4,5,5,5-decafluoropentane with 1.0-11.0 weight percent methanol, wherein the composition has a boiling point of about 39.9.degree. C. when the pressure is adjusted to substantially atmospheric pressure;
- (b) 91.0-99.0 weight percent 1,1,1,2,3,4,5,5,5-decafluoropentane with 1.0-9.0 weight percent ethanol, wherein the composition has a boiling point of about 43.4.degree. C. when the pressure is adjusted to substantially atmospheric pressure;
- or
- (c) 93.0-99.0 weight percent 1,1,1,2,3,4,4,5,5,5-decafluoropentane with 1.0-7.0 weight percent isopropanol, wherein the composition has a boiling point of about 45.5.degree. C. when the pressure is adjusted to substantially atmospheric pressure.
1 more element
Dependencies are inferred from the claim text.