Non-flammable hydraulic fluids
US4528109A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1983 |
| Grant date | Jul 9, 1985 |
| Priority date | — |
| Expiry date | Aug 3, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/08
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Non-flammable hydraulic fluids which are particularly useful for replacing existing hydraulic fluids in hydraulic systems employing acrylonitrile-butadiene rubber and Viton or PNF seals are disclosed. The non-flammable hydraulic fluids of the present invention comprise a fluorinated chlorotrifluoroethylene oil, an aliphatic ester, a liquid polyester or polyether, a hydrocarbon oil having a low wax content, and a phenolic antioxidant. The chlorotrifluoroethylene oil is present in an amount of at least about 75% by volume of the hydraulic fluid. Such hydraulic fluids are useful in applications where the flammability of existing fluids poses a significant risk of combustion or explosion due to the possibility of leakage of the fluid from the hydraulic system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.