Water-based hydraulic fluids
US4806256A · kind A · utility
46Cited by
5References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1987 |
| Grant date | Feb 21, 1989 |
| Priority date | — |
| Expiry date | Jan 13, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2050/01
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Water-based hydraulic fluids are thickened by admixing the fluid with a viscoelastic surfactant. Viscoelastic surfactants comprise surfactant ions and organic counterions that associate with the hydraulic fluid to form the viscoelastic surfactant. Water-based hydraulic fluids of this invention are highly shear stable and do not experience substantial viscosity loss with an increase in temperature. The hydraulic fluids are capable of providing low amounts of wear in pumping apparatus during use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.