Process for converting polyaminopolyaryl-methanes into diaminodiarylmethanes

US4089901A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Peter Ziemek · Cologne, DE
• Roderich Raue · Dover, US
• Hans-Josef Buysch · Krefeld, DE

Key dates

• Filing date: Feb 12, 1974
• Grant date: May 16, 1978
• Expiry date: Feb 12, 1994

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G59/5033
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyaminopolyarylmethanes and a monoarylamine are heated in water in the presence of a solid acid catalyst insoluble in the reaction mixture to convert the polyarylaminopolyarylmethanes into diaminodiarylmethanes.