Nitrogen-functionalized olefin polymers for driveline lubricants
US11180711B2 · kind B2 · utility
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Key dates
| Filing date | Aug 16, 2018 |
| Grant date | Nov 23, 2021 |
| Priority date | — |
| Expiry date | Aug 16, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2060/09
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A lubricant composition of an oil of lubricating viscosity, a grafted copolymer viscosity modifier that is an ashless condensation reaction product of an olefin polymer, having a number average molecular weight of about 1000 to about 10,000, comprising carboxylic acid or equivalent functionality grafted onto the polymer backbone, with a monoamine or a polyamine often having a single primary amino group, which exhibits good dispersancy and viscometric performance in a driveline device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.