Water-based hydraulic fluid compositions containing selected two-component anti-wear agents
US4569778A · kind A · utility
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9Claims
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Key dates
| Filing date | Mar 22, 1985 |
| Grant date | Feb 11, 1986 |
| Priority date | — |
| Expiry date | Mar 22, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2050/01
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed is an improved water-based hydraulic fluid composition which comprises an aqueous composition having a viscosity of at least 5 centistokes at 40.degree. C. which contains up to about 95 percent by weight of water, at least 0.1 percent by weight of a carboxylic acid lubricity agent, and an effective amount of an anti-wear additive; wherein the improvement comprises: PA0 said anti-wear agent comprising the combination of: PA1 (a) mono-, di-, and trihydroxy-substituted aromatic non-carboxylic acid compounds; with PA1 (b) substituted aromatic compounds, wherein the substituents comprise mono-, di-, and trinitro groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.