Perfluoroalkylmonocarboxylic acid esters containing n,n'-disubstituted hydantoin groups and glycidyl groups
Abstract
Abstract Perfluoroalkylmonocarboxylic acid esters from N-heterocyclic epoxides are provided. These esters contain a perfluoro alkyl radical, which is bonded directly or via an alkylene group with 1 to 10 carbon atoms to a carboxyl group. This carboxyl group is bonded in an ester-like manner to an acyclic, aliphatic radical substituted in the 2-position to the ester bridge by a free, etherified or esterified hydroxyl group. This latter radical being bonded to a ring nitrogen atom of a N-heterocyclic radical, which in turn at least by its second ring nitrogen atom is bonded to an acyclic aliphatic radical which contains an epoxide group in the terminal position or is linked to a an acyclic aliphatic radical which is in turn bonded in an esterlike manner to a perfluoroalkyl radical. These fluoro compounds are manufactured from the corresponding perfluoroalkylcarboxylic acids and epoxides and are used for finishing of porous and non-porous substrates, especially for producing oleophobic finishes on textiles.
Inventors
- 👤 Horst Jaeger
Bibliographic Details
Claims Analysis
Total Claims: 13References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |