Invert emulsifiers for oil-base drilling muds
US4658036A · kind A · utility
64Cited by
2References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 3, 1985 |
| Grant date | Apr 14, 1987 |
| Priority date | — |
| Expiry date | Oct 3, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/32
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process is disclosed for preparation of invert emulsifiers useful for oil-base drilling muds. The emulsifiers are prepared by reacting at least one tall oil fatty acid with acrylic acid, maleic anhydride or fumaric acid. The product of this reaction is substantially reacted with diethylene triamine, and at least one tall oil fatty acid to give the invert emulsifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.