Stabilized hydrotreated and hydrowaxed lubricant compositions

US6410490B1 · kind B1 · utility

Assignee

• Ciba Specialty Chemicals Corporation · US

Inventors

• Jose Reyes-Gavilan · Glen Allen, US
• Frederick T. Lichtenberg · Hartsdale, US
• Adesola O. Oshode · The Bronx, US
• Miles J. Hutchings · Eastchester, US
• Peter Collen Hamblin · Winnipeg, CA
• Michael Fletschinger · Bad Krozingen, DE
• Peter Rohrbach · Remchingen, DE

Key dates

• Filing date: May 18, 2000
• Grant date: Jun 25, 2002
• Expiry date: May 18, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10M2223/065
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The instant invention relates to a lubricant composition stabilized against the deleterious effects of heat and oxygen. The composition comprises a hydrotreated or hydrodewaxed oil and an effective antioxidant stabilizing amount of a mixture of a phenolic antioxidant; an N,N-disubstituted aminomethyl-1,2,4-triazole; an aromatic amine antioxidant; an alkyl phenoxy alkanoic acid; and an N-acyl sarcosine derivative. Optionally, further additives are added to the subject lubricant compositions.