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AssigneeE. I. Du Pont de Nemours and Company
InventorsDouglas R. Anton, Frank J. Weigert
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Mixtures of the compound 1,1,1,2,2,5,5,5-octafluoro-4-trifluoromethylpentane with alcohols, ethers, esters, ketones, nitrogen-containing organic compounds, and halogenated hydrocarbons are disclosed; as is a process for cleaning a solid surface which comprises treating the surface with said mixtures. Binary mixtures of 1,1,1,2,2,5,5,5-octafluoro-4-trifluoromethylpentane with about 5 to 13 weight percent methanol, with about 2 to 10 weight percent ethanol, with about 3 to 11 weight percent isopropanol, with about 50 to 58 weight percent dichloromethane, and with about 1 to 9 weight percent acetonitrile, are disclosed as azeotrope or azeotrope-like compositions and are particularly suited for use where solvent recovery and reuse is practiced.
A cleaning composition consisting essentially of (i) between 5 and 99 percent by weight 1,1,1,2,2,5,5,5-octafluoro-4-trifluoromethylpentane and (ii) at least about 1 percent by weight of at least one solvent selected from the group consisting of alcohols containing from 1 to 4 carbon atoms, esters containing from 3 to 6 carbon atoms, ethers containing from 2 to 6 carbon atoms, ketones containing from 3 to 6 carbon atoms, halogenated hydrocarbons containing from 1 to 4 carbonatoms wherein the halogen is chlorine or both chlorine and fluorine, acetonitrile, and nitromethane.
A composition comprising from about 87 to 95 weight percent 1,1,1,2,2,5,5,5-octafluoro-4-trifluoromethylpentane and from about 5 to 13 weight percent methanol.
A composition comprising from about 90 to 98 weight percent 1,1,1,2,2,5,5,5-octafluoro-4-trifluoromethylpentane and from about 2 to 10 weight percent ethanol.
A composition comprising from about 89 to 97 weight percent 1,1,1,2,2,5,5,5-octafluoro-4-trifluoromethylpentane, and from about 3 to 11 weight percent isopropanol.
A composition comprising from about 42 to 50 weight percent 1,1,1,2,2,5,5,5-octafluoro-4-trifluoromethylpentane and has about 50 to 58 weight percent dichloromethane.
An composition comprising from about 91 to 99 weight percent 1,1,1,2,2,5,5,5-octafluoro-4-trifluoromethylpentane and from about 1 to 9 weight percent acetonitrile.
Dependencies are inferred from the claim text.