Lubricant composition comprising a sulfur additive and a borated dispersant
US5141658A · kind A · utility
Inventor
Key dates
| Filing date | Aug 28, 1991 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | Aug 28, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2050/01
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention is directed to novel compositions comprising (A) certain sulfur compounds, and (B) at least one carboxylic detergent composition. The compositions of the invention are useful as additives in lubricants and functional fluids, fuels and aqueous systems. Lubricating, fuel and functional fluid compositions containing the derivatives of the invention exhibit improved antioxidant, anti-wear, thermal stability and/or extreme-pressure properties. The compositions of the invention comprise the combination of PA1 (A) at least one sulfur compound characterized by the structural formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, G.sup.1 and G.sup.2 and x are as defined hereinafter; and PA1 (B) at least one carboxylic dispersant composition prepared by the reaction of a hydrocarbon-substituted succinic acid-producing compound with at least about one-half equivalent, per equivalent of acid-producing compound, of an organic hydroxy compound, or amine containing at least one hydrogen attached to a nitrogen atom, or a mixture of said hydroxy compound and amine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.