Synthetic diesel engine lubricants containing dispersant-viscosity modifier and functionalized phenol detergent
US6610637B2 · kind B2 · utility
6Cited by
10References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2001 |
| Grant date | Aug 26, 2003 |
| Priority date | — |
| Expiry date | Oct 16, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2060/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A lubricant containing (a) a synthetic base oil composition having an overall kinematic viscosity of at least about 4.8×10−6m2/s (4.8 cSt) at 100° C. and a viscosity index of at least about 110; (b) a dispersant-viscosity modifier; and (c) a sulfur-free functionalized hydrocarbyl-substituted phenol detergent provides improved valve train wear, with longer drain intervals, to heavy duty diesel engines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.