Protective additive for radiators in coolants containing water

US4324675A · kind A · utility

Assignee

• BASF SE

Inventors

• Klaus Barthold · Mannheim, DE
• Gert Liebold · Edingen-Neckarhausen, DE

Key dates

• Filing date: Dec 29, 1980
• Grant date: Apr 13, 1982
• Expiry date: Dec 29, 2000

Classification

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

Abstract

Alkylene glycol-based coolants free of nitrites, amines, and phosphates are metal corrosion inhibited with at least one nucleus-substituted benzoic acid and at least one conventional corrosion inhibitor for metals.