Use of an amphoteric surfactant as a friction-reducing agent
US5700766A · kind A · utility
9Cited by
8References
9Claims
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Key dates
| Filing date | Apr 19, 1996 |
| Grant date | Dec 23, 1997 |
| Priority date | — |
| Expiry date | Apr 19, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2050/01
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An alkoxylated alkanolamide of general formula (I), ##STR1## wherein R is a hydrocarbon group having 7-35 carbon atoms, preferably 9-23 carbon atoms, A is an alkyleneoxy group having 2-4 carbon atoms, and n is 2-20, preferably 3-12, is used for producing a water-based liquid system with reduced flow resistance between the flowing, water-base liquid system and a solid surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.