Star polymer lubricating composition
US9528070B2 · kind B2 · utility
0Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2007 |
| Grant date | Dec 27, 2016 |
| Priority date | — |
| Expiry date | Apr 12, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/25
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention provides a lubricating composition containing (a) 0.1 to 15 wt % of a polymer with (i) a weight average molecular weight of 100,000 to 500,000; and (ii) a shear stability index of 10 to 60; (b) a phosphorus-containing acid, salt, or ester; (c) a dispersant; and (d) an oil of lubricating viscosity. The invention further provides a method for lubricating a mechanical device with the lubricating composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.