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US 3,960,746 AGranted
Azeotrope-like compositions of methanol, nitromethane and trichlorotrifluoroethane
AssigneeE. I. Du Pont de Nemours and Company
InventorRobert Alexander Gorski
Life of this patent
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Abstract
Azeotrope-like compositions comprising from 5.0 to 6.3 weight percent of methanol, from 0.05 to 0.6 weight percent of nitromethane and from 93.1 to 94.95 weight percent of 1,1,2-trichloro-1,2,2-trifluoroethane, the compositions being useful for cleaning printed circuit boards.
Claims2
An azeotrope-like composition consisting essentially of from 5.0 to 6.3 weight percent of methanol, from 0.05 to 0.6 weight percent of nitromethane and from 93.1 to 94.95 weight percent of 1,1,2-trichloro-1,2,2-trifluoroethane.
Dependencies are inferred from the claim text.