Lubricating oil compositions containing encapsulated microscale particles
US10000717B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2015 |
| Grant date | Jun 19, 2018 |
| Priority date | — |
| Expiry date | Aug 17, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2050/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for improving wear control in an engine or other mechanical component lubricated with a lubricating oil by using as the lubricating oil a formulated oil. The formulated oil has a composition including a lubricating oil base stock as a major component, and encapsulated microscale particles, as a minor component. The minor component contains no sulfur or phosphorus. The encapsulated microscale particles include an encapsulating material and a core material encapsulated by the encapsulating material. The core material includes at least one metal salt selected from a metal oxide, metal hydroxide, metal carbonate, or mixtures thereof. The encapsulating material is derived from a carboxylic acid selected from an aliphatic carboxylic acid, a cycloaliphatic carboxylic acid, an aromatic carboxylic acid, and mixtures thereof. The lubricating oils are useful in internal combustion engines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.