Alkoxylated alkanolamide together with an ionic surfactant as friction-reducing agent
US5911236A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1997 |
| Grant date | Jun 15, 1999 |
| Priority date | — |
| Expiry date | Mar 26, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0391
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The use of a mixture of at least one alkanolamide of general formula (I), RC(O)NH(A).sub.n H, wherein R is a hydrocarbon group having 7-23 carbon atoms, preferably 11-23 carbon atoms, A is an alkyleneoxy group having 2-4 carbon atoms and n is 2-12, preferably 2-8, and at least one ionic surfactant selected from the group consisting of anionic, cationic, amphoteric and zwitterionic, in a proportion between the alkoxylated alkanolamide and the ionic surfactant from 100:1 to 1:2, preferably in the range from 50:1 to 1:1 for producing a water-base 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.