Additive for use in metal working

US4268404A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Michael Ahlgrim · Lechenich, DE
• Gerhard Mietens · Hürth, DE
• Franz-Josef Dany · Lechenich, DE
• Joachim Kandler · Lechenich, DE

Key dates

• Filing date: Nov 13, 1979
• Grant date: May 19, 1981
• Expiry date: Nov 13, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2040/247
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a long chain ammonium polyphosphate and its use as an effective additive in lubricants and/or coolants for metal working under extremely high pressures and temperatures. The polyphosphate chain preferably contains 50 to 1000 phosphorus atoms. Up to 20% of the ammonium groups are replaceable by hydrogen. The additive is preferably added to the lubricant/coolant in a proportion of 0.1 to 30 weight %.