Phosphorus-containing compounds based on 1-hydroxypropane-1, 3-diphosphonic acid

US6090345A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Christoph Holzner · Neunburg vorm Wald, DE
• Armin Spaniol · Bensberg, DE
• Hans Dahmen · Cologne, DE

Key dates

• Filing date: Jan 29, 1999
• Grant date: Jul 18, 2000
• Expiry date: Jan 29, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/404
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to phosphorus-containing compounds based on 1-hydroxypropane-1,3-diphosphonic acid and to the acid itself of general formula (I) ##STR1## in which M.sup.1, M.sup.2, M.sup.3, M.sup.4 and M.sup.5, independently of one another, each denote a radical from the series hydrogen, alkali metal, an equivalent of ammonium, alkyl- or hydroxyalkyl-substituted ammonium, a process for the preparation thereof, novel intermediates and the use thereof as a corrosion inhibitor, scale inhibitor and as a flame retardant.