Compositions comprising pentafluorobutane and trans-1,2-dichloroethylene and use of these compositions
AssigneeSolvay (Societe Anonyme)
InventorsPierre Barthelemy, Mireille Paulus, Robert Putteman
Life of this patent
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Abstract
The invention relates to compositions comprising 1,1,1,3,3-pentafluorobutane, 1,2-dichloroethylene and optionally a C1-C3 alkanol. These compositions can be used especially as solvents for cleaning and defluxing electronic components and for degreasing metals.
Claims11
An azeotropic composition or a composition in which, at a given temperature and pressure, the composition of the vapor phase is substantially the same as the composition of the liquid phase consisting essentially of 56% to 82% by weight of 1,1,1,3,3-pentafluorobutane and 44% to 18% by weight of trans-1,2-dichloroethylene wherein the composition has a boiling point of about 36.5.degree. C. at 1022 mbar.
An azeotropic composition or a composition in which, at a given temperature and pressure, the composition of the vapor phase is substantially the same as the composition of the liquid phase consisting essentially of 62% to 68% by weight of 1,1,1,3,3-pentafluorobutane 28% to 34% by weight of trans-1,2-dichloroethylene, and 2% to 7% by weight of methanol wherein the composition has a boiling point of about 32.degree. C. at atmospheric pressure.
An azeotropic composition or a composition in which, at a given temperature and pressure, the composition of the vapor phase is substantially the same as the composition of the liquid phase consisting essentially of 64% to 68% by weight of 1,1,1,3,3-pentafluorobutane, 30% to 35% by weight of trans-1,2-dichloroethylene, and 1% to 3% by weight of ethanol wherein the composition has a boiling point of about 34.degree. C. at atmospheric pressure.
Dependencies are inferred from the claim text.