Extended operation engine coolant composition

US9540558B2 · kind B2 · utility

Assignee

• Ashland Licensing and Intellectual Property LLC · US

Inventors

• David E. Turcotte · Woodhaven, US
• Ladislaus Meszaros · Mutterstadt, DE
• David F. Embaugh · Lancaster, US
• Gefei Wu · Lexington, US

Key dates

• Filing date: Dec 17, 2015
• Grant date: Jan 10, 2017
• Expiry date: Dec 17, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C23F11/126
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to an engine coolant composition, and a method of increasing the operational life of a coolant composition in an engine, wherein an isononanoic acid is incorporated into the generally glycol based coolant fluid in place of nitrous acid or its salt to reduce pitting corrosion on iron containing surfaces, and one or more hydroxybenzoic acids are incorporated.