Metal salts of lactones as lubricant additives

US6340659B1 · kind B1 · utility

Assignee

• The Lubrizol Corporation · US

Inventors

• Jody A. Kocsis · Chagrin Falls, US
• Sheri L. Blystone · Greenville, US
• Ewa A. Bardasz · Mentor, US
• Marvin B. DeTar · Wickliffe, US

Key dates

• Filing date: Dec 13, 1995
• Grant date: Jan 22, 2002
• Expiry date: Dec 13, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2070/02
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Lubricants which comprise, as an additive a salt of the reaction product of (i) glyoxylic acid or a hydrocarbyl substituted glyoxylic acid and (ii) a hydroxyaromatic compound, at least a portion of the molecules of which are alkyl-substituted, are useful for lubricating ceramic-containing engines, high temperature engines, and natural gas-fueled engines. Particularly useful additives are those in which the hydroxyaromatic compound is a dialkyl phenol containing a t-butyl group in an ortho position.