Nitrite- and phosphate-free glycol-based coolant mixtures

US4810404A · kind A · utility

Assignee

• BASF SE

Inventors

• Charalampos Gousetis · Ludwigshafen, DE
• Knut Oppenlaender · Ludwigshafen, DE
• Gert Liebold · Edingen-Neckarhausen, DE
• Guenter Frey · Schifferstadt, DE

Key dates

• Filing date: Feb 26, 1988
• Grant date: Mar 7, 1989
• Expiry date: Feb 26, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K5/20
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Glycol-based coolant mixtures which are free of nitrites and phosphates contain alkali metal salts of bis(carboxyalkyloxyphenyl)-2,2-propane and stabilized silicate and also further corrosion-inhibiting additives.