Oil formulations containing overbased multi-functional additive
US4954273A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1988 |
| Grant date | Sep 4, 1990 |
| Priority date | — |
| Expiry date | Oct 27, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/08
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Oil based compositions including crank case oils and in particular diesel engine crank case oils are disclosed which are comprised of oil having a multi-functional additive component therein. The additive component is present in sufficient amounts so as to provide improved performance characteristics to the composition such as pH stability, water tolerance and antiwear characteristics. The additive is an overbased salt of a compound represented by the general structural formula (I): ##STR1## wherein R is a hydrocarbyl, preferably iso-stearyl, R.sub.1, R.sub.2, and R.sub.3 are independently hydrogen or aklyl, preferably hydrogen and n is 1 to 20, preferably 1 to 5. Statistical mixtures and mixed salts of the additive compound are also disclosed as are fully formulated oils. The additive is an effective pH stabilizer, EP agent, and water tolerance fix in a variety of functional fluids and lubricating compositions such as crank case oils, particularly diesel engine crank case oils. In crank case oil compositions the additive provides a number of improved performance properties, most importantly improved detergent capabilities (resulting in cleaner engine parts) and improved frictional…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.