Lubricant compositions based on block copolymers and processes for making

US8835366B2 · kind B2 · utility

Assignee

• EXXONMOBIL RESEARCH AND ENGINEERING COMPANY · US

Inventors

• Abhimanyu O. Patil · Westfield, US
• Jacob J. Habeeb · Westfield, US
• Benjamin D. Eirich · Frenchtown, US
• Nicole D. Vaughn · Mullica Hill, US
• Charles L. Baker, Jr. · Thornton, US

Key dates

• Filing date: Dec 22, 2011
• Grant date: Sep 16, 2014
• Expiry date: Nov 20, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2040/25
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Provided are lubricant compositions with improved oxidative stability and frictional and wear resistance properties for use in engine oil applications. The lubricant compositions include: i) a first base stock selected from a Group I base stock, a Group II base stock or a combination thereof at 50 to 80 wt %; ii) a block copolymer at 1 to 10 wt %; iii) a viscosity modifier at 3 to 15 wt % selected from polymers and copolymers of methacrylate, butadiene, olefins and alkylated styrenes; and iv) an additive package including a combination of antioxidants, dispersants, detergents, friction modifiers and antiwear agents at 2 to 30 wt %.