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Assignee3M Innovative Properties Company
InventorsRichard M. Flynn, Dean S. Milbrath, John G. Owens, Daniel R. Vitcak, Hideto Yanome
Estimating the term…
The invention provides azeotropc-like compositions consisting essentially of RfOCH3, where Rf is a branched or straight chain perfluoroalkyl group having 4 carbon atoms, and one or more organic solvent(s) selected from the group consisting of: straight chain, branched chain and cyclic alkanes containing 6 to 8 carbon atoms; cyclic and acyclic ethers containing 4 to 6 carbon atoms; ketones having 3 carbon atoms; chlorinated alkanes containing 1, 3 or 4 carbon atoms; chlorinated alkenes containing 2 carbon atoms, alcohols containing 1 to 4 carbon atoms, partially fluorinated alcohols containing 2 to 3 carbon atoms, 1-bromopropane, acetonitrile, HCFC 225ca (1,1,-dichloro-2,2,3,3,3 pentafluoropropane and HCFC-225cb (1,3-dichloro-1,1,2,2,3-pentafluoropropane).
An azeotrope-like composition including perfluorobutyl methyl ether, consisting essentially of perfluoro-n-butyl methyl ether and perfluoroisobutyl methyl ether and mixtures thereof, which composition comprises about 78 to 98 weight percent of the ether and about 2 to 22 weight percent acetonitrile that boils at about 55 to 57° C. at about 731 torr.
An azeotrope-like composition including perfluorobutyl methyl ether, wherein said ether consists essentially of about 95 weight percent perfluoro-n-butyl methyl ether and about 5 weight percent perfluoroisobutyl methyl ether, and acetonitrile which, when fractionally distilled, form a distillate fraction that is an azeotrope that consists essentially of about 92 weight percent of the ether and about 8 percent of the acetonitrile and boils at about 57° C. at about 732 torr.
An azeotrope-like composition including perfluorobutyl methyl ether, wherein said ether consists essentially of about 35 weight percent perfluoro-n-butyl methyl ether, and about 65 weight percent perfluoroisobutyl methyl ether, and acetonitrile, the compositions, when fractionally distilled, form a distillate fraction that is an azeotrope that consists essentially of about 93 weight percent of the ether and about 7 percent of the acetonitrile and boils at about 57° C. at about 742 torr.
Dependencies are inferred from the claim text.