Quaternary ammonium salts as thickening agents for aqueous systems
US7776798B2 · kind B2 · utility
13Cited by
106References
37Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 1, 2007 |
| Grant date | Aug 17, 2010 |
| Priority date | — |
| Expiry date | Feb 1, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S516/902
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention relates to the use of alkyl amido quaternary ammonium salts, and formulations thereof, as thickening agents in aqueous based fluids, especially those used in oil field applications. The quaternary ammonium salts of the present invention exhibit improved gelling characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.