US Patent:
20190375997, Dec 12, 2019
Inventors:
- Annandale NJ, US
Lisa I-Ching Yeh - Marlton NJ, US
Yogi V. Shukla - Cherry Hill NJ, US
Bryan E. Hagee - Hamilton NJ, US
Debra A. Sysyn - Monroe NJ, US
Kendall S. Fruchey - Easton PA, US
International Classification:
C10M 101/02
C10G 47/18
C10G 69/02
C10G 65/12
Abstract:
A base stock having at least 90 wt. % saturates, an amount and distribution of aromatics, as determined by ultra violet (UV) spectroscopy, including an absorptivity between 280 and 320 nm of less than 0.015 l/gm-cm, a viscosity index (VI) from 80 to 120, and having a cycloparaffin performance ratio greater than 1.05 and a kinematic viscosity at 100 C. between 4 and 6 cSt. A base stock having at least 90 wt. % saturates, an amount and distribution of aromatics, as determined by UV spectroscopy, including an absorptivity between 280 and 320 nm of less than 0.020 l/gm-cm, a viscosity index (VI) from 80 to 120, and having a cycloparaffin performance ratio greater than 1.05 and a kinematic viscosity at 100 C. between 10 and 14 cSt. A lubricating oil having the base stock as a major component, and one or more additives as a minor component. Methods for improving oxidation performance and low temperature performance of formulated lubricant compositions through the compositionally advantaged base stock.