Fluorinated sulfonic acids and derivatives thereof
Abstract
Abstract The invention is directed to fluorinated alkylamido sulfonic acids and salts of the formula ##STR1## where R f is straigt or branched chain perfluoroalkyl of 1 to 18 carbon atoms or perfluoroalkyl substituted by perfluoroalkoxy of 2 to 6 carbon atoms, R 1 is hydrogen or lower alkyl and each of R 2 , R 4 and R 5 is individually hydrogen or a hydrocarbon radical, and R 6 is alkylene, alkylenethioalkylene, alkyleneoxyalkylene or alkyleneiminoalkylene with a secondary or tertiary nitrogen atom. R 3 is hydrogen, alkyl, aryl or pyridyl, M is hydrogen, a monovalent alkali metal, an alkaline earth metal, an organic base or ammonium, and n is an integer corresponding to the valency of M. Said compounds are prepared by a base catalyzed addition reaction of the thiol, R f -R 6 SH, to an alkyenylamido sulfonic acid salt. The compounds are useful as surfactants and as levelling agents in floor polish formulations.
Inventors
- 👤 Robert Ernest Arthur Dear
- 👤 Eduard Karl Kleiner
Bibliographic Details
Claims Analysis
Total Claims: 10References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |