Secondary and tertiary amines as friction modifiers for automatic transmission fluids

US7618929B2 · kind B2 · utility

Assignee

• The Lubrizol Corporation · US

Inventors

• Craig D. Tipton · Logan, US
• Mark R. Baker · Lyndhurst, US
• Shreyasi Lahiri · Mentor, US
• William D. Abraham · Powell, US
• Richard J. Vickerman · Stow, US
• Suzanne M. Patterson · Seven Hills, US

Key dates

• Filing date: Apr 12, 2006
• Grant date: Nov 17, 2009
• Expiry date: Feb 1, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2040/042
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A composition of a major amount of an oil of lubricating viscosity; a secondary or tertiary amine being represented by the formula R1R2NR3 wherein R1 and R2 are alkyl groups of at least 6 carbon atoms and R3 is hydrogen, a hydrocarbyl group, a hydroxyl-containing alkyl group, or an amine-containing alkyl group; and a dispersant, provides high static coefficients of friction and a durable positive slope during oxidative and mechanical stressing, particularly as a friction component of an automatic transmission.