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US 7,662,303 B2Granted
Perfluorobutyl ether-based composition
AssigneeArkema France
InventorJean-Pierre Lallier
Life of this patent
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Abstract
The present invention relates to perfluorobutyl ether mixtures or compositions that are azeotropic or of azeotropic type. More particularly, one subject of the invention is compositions comprising at least one nonafluorobutyl alkyl ether and a biodegradable compound, capable of being used as a solvent or refrigerant.
Claims7
An azeotropic or azeotropic type composition comprising 2-methyltetrahydrofuran and nonafluorobutyl ethyl ether.
Azeotropic composition comprising 24.6 wt % of 2-methyltetrahydrofuran and 75.4 wt % of nonafluorobutyl ethyl ether having a boiling point of 71.6° C. at atmospheric pressure (103.3 kPa).
Dependencies are inferred from the claim text.