Perfluorobutyl Ether-Based Composition
AssigneeArkema France
InventorJean-Pierre LALLIER
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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.
Claims11
1) Compositions comprising methyltetrahydrofuran and at least one nonafluorobutyl alkyl ether of formula C4F9OR with R representing a linear or branched saturated alkyl chain having from 1 to 4 carbon atoms.
7) Azeotropic composition comprising 8 wt % of methyltetrahydrofuran and 92 wt % of nonafluorobutyl methyl ether having a boiling point of 59.7° C. at atmospheric pressure (103.3 kPa).
9) Azeotropic composition comprising 24.6 wt % of 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.