Destructable fluorinated alkoxysilane surfactants and repellent coatings derived therefrom
US5274159A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1993 |
| Grant date | Dec 28, 1993 |
| Priority date | — |
| Expiry date | Feb 18, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31504
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides liquid, destructible fluorinated nonionic surfactants that are water-soluble or dispersible, that are useful as stabilizers for emulsions, and that on curing as a layer on a substrate can provide the substrate with an oil- and water-repellent coating that is free of surfactant, the destructible surfactant comprising a fluorocarbylalkoxysilane having at least one polyfluorinated aliphatic group that is both hydrophobic and oleophobic and at least one, preferably two, polyoxyalkylene or other hydrophilic groups which can be cleaved from the hydrophobe by hydrolysis. More particularly, a fluorocarbylalkoxysilane comprises at least one polyfluorinated aliphatic group and at least one polyoxyalkylene group or other hydrophilic group, said fluorocarbylalkoxysilane being destructible by hydrolysis. The invention further provides an aqueous composition for providing a substrate with an oil and water repellent coating comprising the fluorocarbylalkoxysilane of the invention as well as a process for providing a substrate with an oil and water repellent coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.