Nitrite- and phosphate-free antifreeze based on glycol

US5064552A · kind A · utility

Assignee

• BASF SE

Inventors

• Knut Oppenlaender · Ludwigshafen, DE
• Juergen Mohr · Havelsee, DE
• Gert Liebold · Edingen-Neckarhausen, DE
• Guenter Frey · Schifferstadt, DE

Key dates

• Filing date: Feb 26, 1991
• Grant date: Nov 12, 1991
• Expiry date: Feb 26, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C23F11/08
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A glycol-based antifreeze mixture which is free of nitrites and phosphates contains an alkali metal salt of a C.sub.4 -C.sub.16 -alkenylsuccinic acid, stabilized silicate and further corrosion-inhibiting additives.