Perfluoroalkyl composition with reduced chain length
US9956448B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 14, 2014 |
| Grant date | May 1, 2018 |
| Priority date | — |
| Expiry date | Nov 2, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G75/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Novel fluorosurfactants are provided that contain perfluoroalkyl groups no longer than perfluorohexyl (C6). The surfactants are useful in the preparation of aqueous film forming foams (AFFF) and alcohol-resistant film-forming foams (AR-AFFF) for firefighting. Unexpectedly, these compounds have activity in AFFF and AR-AFFF applications that is comparable and even superior to conventional surfactants that contain perfluoroalkyl groups that are perfluorooctyl (C8) and longer. Also provided are methods of making the novel surfactants, as well as foam concentrates, methods of making foam and methods of fighting fires using foam containing the novel surfactants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.