Lubricant with high pyrophosphate level

US11352582B2 · kind B2 · utility

Assignee

• The Lubrizol Corporation · US

Inventors

• Jamal Kassir · Houston, US
• William R. S. Barton · Belper, GB
• Paul E. Adams · Willoughby Hills, US
• Lisa Blanazs · Mannheim, DE

Key dates

• Filing date: Oct 27, 2016
• Grant date: Jun 7, 2022
• Expiry date: Sep 2, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2070/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A lubricant composition comprising an oil of lubricating viscosity and 0.01 to 5 percent by weight of a substantially sulfur-free alkyl phosphate amine salt, where at least 30 mole percent of the phosphorus atoms are in an alkyl pyrophosphate salt structure, exhibits good antiwear performance. In the phosphate amine salt, at least 80 mole percent of the alkyl groups are typically secondary alkyl groups of 3 to 12 carbon atoms.