Low temperature hydraulic fluids based on two centistoke synthetic hydrocarbons
US4519932A · kind A · utility
15Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1983 |
| Grant date | May 28, 1985 |
| Priority date | — |
| Expiry date | Sep 16, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M2223/041
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Useful hydraulic fluids having low temperature properties comparable to MIL-H-5606 fluids but exhibiting markedly superior fire resistance due to their higher flash points are obtained by blending a two centistoke synthetic hydrocarbon oil obtained from the oligomerization of alpha-olefins with a mono- or diester and polymethacrylate viscosity index improver. The fluids of this invention typically have -65.degree. F. viscosities less than 3000 centistokes, 210.degree. F. viscosities of 3.45 or above, and flash points above 320.degree. F. and are readily formulated with conventional additives.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.