Antioxidant additive and lubricating oil containing same
US5180510A · kind A · utility
0Cited by
12References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1988 |
| Grant date | Jan 19, 1993 |
| Priority date | — |
| Expiry date | Mar 31, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/28
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An additive for improving the antioxidation properties of lubricating oil is made by reacting a sulfur halide selected from sulfur monochloride or sulfur dichloride with an aliphatic monoolefin (e.g. isobutene) to form an adduct, reacting the adduct thus formed with an alkali metal salt of an organocarbamodithioic acid in an aqueous alkanol medium and recovering the reaction product. When added to lubricating oil, the additive products of the invention improve the antioxidation properties of the lubricating oil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.