Crystal formation reduction in lubricating compositions
US6689726B1 · kind B1 · utility
2Cited by
9References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 17, 2002 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Jun 17, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M2223/047
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Lubricating oil formulations comprising base oil, sulfur-phosphorous anti-wear/extreme pressure agent and hindered phenol antioxidant, which combination of extreme pressure agent and hindered phenol antioxidant produces crystals and containing antioxidants, wherein the base oil is characterized as having a saturates content of 99 wt % or more is stabilized against crystal formation by the addition of a minor amount of high molecular weigh di- or polycarboxylic acid, or anhydride and an ester.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.