Use of modified polyaspartic acids in washing agents

US6001798A · kind A · utility

Assignee

• BASF SE

Inventors

• Richard Baur · Mutterstadt, DE
• Werner Bertleff · Viernheim, DE
• Hans-Ulrich Jager
• Angelika Funhoff · Schriesheim, DE
• Matthias Kroner · Eisenberg, DE
• Gunnar Schornick · Neuleiningen, DE

Key dates

• Filing date: Mar 4, 1998
• Grant date: Dec 14, 1999
• Expiry date: Mar 4, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D3/3719
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The use of modified polyaspartic acids which are obtainable by polycondensation of aspartic acid in the presence of, in each case based on the aspartic acid employed, PA1 (a) 2.5 to 25 mol % of amines with at least 6 carbon atoms PA1 (b) at least 2% by weight of phosphoric acid, phosphorous acid, hypophosphorous acid, polyphosphoric acids, phosphorus pentoxide, phosphonic acids or mixtures of said acids, at temperatures of at least 120.degree. C. and subsequent hydrolysis with bases to give modified polyaspartic acids with a phosphorus content of from 0.5 to 10% by weight, as additive to detergents, and detergents which contain the modified polyaspartic acids in amounts of from 0.1 to 20% by weight.