Ethylene-based copolymers, lubricating oil compositions containing the same, and methods for making them

US8309501B2 · kind B2 · utility

Assignee

• ExxonMobil Chemical Patents Inc. · US

Inventors

• Rainer Kolb · Kingwood, US
• Sudhin Datta · Houston, US
• Liehpao O. Farng · Lawrenceville, US
• Vera Minak-Bernero · Bound Brook, US
• Eric B. Sirota · Flemington, US
• Thomas T. Sun · Clinton, US
• Mun Fu Tse · Seabrook, US

Key dates

• Filing date: Apr 16, 2010
• Grant date: Nov 13, 2012
• Expiry date: Jan 22, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2030/68
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Provided are ethylene-based copolymers, methods of preparing the same, lubricating oil compositions including the same, methods for preparing such lubricating oil compositions, and end uses for such ethylene-based copolymers and lubricating oil compositions. The ethylene-based copolymers may include less than about 80 wt. % of units derived from ethylene and one or more alpha-olefin comonomers having 3 to 20 carbon atoms. The ethylene-based copolymers have a melting peak (Tm), as measured by DSC, of 80° C. or less, and a polydispersity index of about 2.8 or less. In some embodiments, the ethylene-based copolymers have an intramolecular composition distribution of about 50 wt. % or less and/or an intermolecular composition distribution of about 50 wt. % or less.