Nitrogen-functionalized olefin polymers for engine lubricants
US10597599B2 · kind B2 · utility
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16Claims
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Key dates
| Filing date | Nov 17, 2016 |
| Grant date | Mar 24, 2020 |
| Priority date | — |
| Expiry date | Feb 12, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/255
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A lubricant composition of an oil of lubricating viscosity, an ashless condensation reaction product of an olefin polymer, having a number average molecular weight of 2,000 to 70,000, comprising carboxylic acid or equivalent functionality grafted onto the polymer backbone, with a monoamine or a polyamine often having a single primary amino group; a succinimide dispersant; and an overbased metal detergent, in an amount such that the total base number of the lubricant composition is less than 6.5, exhibits good sludge prevention performance in a gasoline engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.