Sulfur-containing compositions, and additive concentrates and lubricating oils containing same
US4612129A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 1985 |
| Grant date | Sep 16, 1986 |
| Priority date | — |
| Expiry date | Jan 31, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Sulfur-containing, oil-soluble compositions are described which are useful as lubricating oil additives, particularly in lubricants containing little or no phosphorus. In one embodiment, the compositions of the invention comprise (A) at least one metal salt of at least one dithiocarbamic acid of the formula EQU R.sub.1 (R.sub.2)N--CSSH (I) wherein R.sub.1 and R.sub.2 are each independently hydrocarbyl groups in which the total number of carbon atoms in R.sub.1 and R.sub.2 is sufficient to render the metal salt oil-soluble, (B) at least one oil-soluble sulfurized organic compound, and (C) at least one auxiliary corrosion-inhibitor. In other embodiments, the compositions also contain (D) at least one detergent/dispersant. Lubricating oil compositions containing the compositions of the invention exhibit improved oxidation-corrosion-inhibiting properties, anti-wear properties, and/or extreme pressure properties. Such lubricating compositions containing less than about 0.1% by weight of phosphorus also exhibit good compatability with nitrile seals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.