Use of (perfluoroalkyl)ethylenes as cleaning or drying agents, and compositions which can be used for this purpose
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United States of America Patent
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Apr 12, 1994
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N/A
app pub date -
Feb 20, 1991
filing date -
Feb 20, 1990
priority date (Note) -
Expired
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Abstract
To replace 1,1,2-trichloro-1,2,2-trifluoroethane (F113) in its applications to the cleaning and drying of solid surfaces, the invention propose to employ a (perfluoroalkyl) ethylene of formula: R.sub.f CH.dbd.CH.sub.2 in which R.sub.f denotes a linear or branched perfluoroalkyl radical containing from 3 to 6 carbon atoms. In contrast to F113, (perfluoroalkyl)ethylenes are not liable to degrade stratospheric ozone.
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