Use of (perfluoroalkyl) ethylenes as cleaning or drying agents, and compositions which can be used for this purpose
US5458800A · kind A · utility
5Cited by
14References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1993 |
| Grant date | Oct 17, 1995 |
| Priority date | — |
| Expiry date | Nov 24, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D7/28
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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: EQU 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.