Sulfurized phenolic antioxidant composition, method of preparing same, and petroleum products containing same
US6096695A · kind A · utility
41Cited by
17References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1996 |
| Grant date | Aug 1, 2000 |
| Priority date | — |
| Expiry date | Jun 3, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2010/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates generally to substantially liquid, chlorine-free, sulfur-bridged phenols useful as antioxidants and more specifically to the preparation of a substantially liquid, chlorine-free, sulfur-bridged, hindered phenol compositions which are effective antioxidant(s) in lubricating oils without causing excessive copper corrosion. The invention also includes lubricating oils containing an antioxidant additive of the present invention, as well as a method of reducing oxidation in the lubricating oil used in a machine such as an internal combustion engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.