Nitrogen-containing dispersant as an ashless TBN booster for lubricants
US7749948B2 · kind B2 · utility
4Cited by
6References
26Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 27, 2007 |
| Grant date | Jul 6, 2010 |
| Priority date | — |
| Expiry date | Jan 17, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2060/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Lubricant compositions comprising (a) an oil of lubricating viscosity; and (b) at least one non-metal-containing additive, comprising a nitrogen-containing dispersant having a total base number of at least about 90 are useful for lubricating an internal combustion engine. The lubricants have less than 1.0% sulfated ash and a total base number of at least about 8.5, and at least 30% of the total base number of the composition is provided by non-metal-containing additives. The lubricants exhibit a high TBN without deterioration of elastomeric seals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.