Chemical base for engine coolant/antifreeze with improved thermal stability properties

US6818146B2 · kind B2 · utility

Assignee

• SHELL OIL COMPNY · US

Inventors

• Edward Eaton · Phoenix, US
• Wyndham Henry Boon · North Canton, US
• Christopher John Smith · Haslemere, GB

Key dates

• Filing date: Nov 21, 2001
• Grant date: Nov 16, 2004
• Expiry date: Dec 31, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/50
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A nontoxic fuel cell engine coolant which has an electrical resistivity of greater than 250 kOhm-cm, a boiling point of greater than 90° C., a freezing point of less than −40° C., a thermal conductivity of greater than 0.4 W/m-k, a viscosity of less than 1 cPs at 80° C., a viscosity of less than 6 cPs at 0° C., a heat capacity of greater than 3 kJ/kg-K, and which is compatible with current cooling system materials.