Group III base stocks and lubricant compositions
US10428284B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2018 |
| Grant date | Oct 1, 2019 |
| Priority date | — |
| Expiry date | Dec 17, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2050/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed are Group III base stocks comprising greater than or equal to about 90 wt. % saturated hydrocarbons (saturates); a viscosity index from 120 to 145; a unique ratio of molecules with multi-ring naphthenes to single ring naphthenes (2R+N/1RN); a unique ratio of branched carbons to straight chain carbons (BC/SC); a unique ratio of branched carbons to terminal carbons (BC/TC); and unique MRV behavior as a function of base stock naphthene ratio (2R+N/1RN). A method for preparing the base stocks is also disclosed. Also disclosed is a lubricating oil having the base stock as a major component, and an additive as a minor component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.