| 摘要 |
PURPOSE:To obtain a hydrofluorocarbon emulsion composition for cleaning, which has little possibility of causing the ozonosphere depletion and has such detergency for ionic contaminants that it can substitute for the conventional chlorofluorocarbon detergents such as CFC-113, by mixing decafluoropentane, a surfactant and water. CONSTITUTION:The composition comprises a mixture of decafluoropentane, a surfactant and water. An example of the decafluoropentane is 1,1,1,2,3,4,4,5,5,5- decafluoropentane (having a boiling point of about 55 deg.C). As the surfactant, a fluorinated surfactant is preferably used in an amount of about 0.1-10wt.% based on the decafluoropentane. The amount of water to be incorporated is about 0.1-20wt.% based on the decafluoropentane. To improve the detergency for oil-soluble contaminants, an organic liquid comprising, e.g. a hydrocarbon, a chlorocarbon or a chlorofluorocarbon may be incorporated into this composition. |
