Hydroxy aromatic mannich base condensation products and the use thereof as soot dispersants in lubricating oil compositions

US6495496B2 · kind B2 · utility

Assignee

• Infineum International Limited · GB

Inventors

• Antonio Gutierrez · Mercerville, US
• Mark G. Stevens · Rancho Cucamonga, US
• Ricardo Bloch · Scotch Plains, US
• Robert A. Kleist · Bayonne, US

Key dates

• Filing date: Dec 22, 2000
• Grant date: Dec 17, 2002
• Expiry date: Dec 22, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2030/041
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Low molecular weight Mannich base condensates of hydroxy aromatic compounds, an aldehyde; and an amine, wherein the combined number of substituent carbon atoms does not exceed 80. Such compounds are useful as soot dispersants in lubricating oils when used alone, or in combination with high molecular weight dispersants.