Low phosphorus- and sulfur-containing lubricating oils
US4582618A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 14, 1984 |
| Grant date | Apr 15, 1986 |
| Priority date | — |
| Expiry date | Dec 14, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M2219/024
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Lubricating oil compositions containing less than about 0.1% by weight of phosphorus are described, and these lubricating compositions comprise a major amount of an oil of lubricating viscosity, and a minor amount of at least one oil-soluble sulfur-containing material which comprises the reaction product of sulfur and a Diels-Alder adduct in a molar ratio less than 1.7:1 wherein the adduct is an adduct of at least one dienophile with at least one aliphatic conjugated diene. Such lubricating oil compositions exhibit improved oxidation-corrosion-inhibiting properties, anti-wear properties, and/or extreme pressure properties. Such lubricating compositions also exhibit improved compatibility with nitrile seals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.