Modified polyaspartic acids, preparation thereof and use thereof

US5747635A · kind A · utility

Assignee

• BASF SE

Inventors

• Matthias Kroner · Eisenberg, DE
• Heinrich Hartmann · Schifferstadt, DE
• Dieter Boeckh · Schifferstadt, DE
• Angelika Funhoff · Schriesheim, DE
• Richard Baur · Mutterstadt, DE
• Alexander Kud · Eppelsheim, DE
• Volker Schwendemann · Neustadt, DE
• Birgit Potthoff-Karl · Weinheim, DE
• Karl-Heinz Buechner · Ottersheim, DE

Key dates

• Filing date: Jan 3, 1995
• Grant date: May 5, 1998
• Expiry date: Jan 3, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D3/3788
• WIPO field: Food chemistry
• WIPO sector: Chemistry

Abstract

Modified polyaspartic acids useful as detergent and cleaner additives, as water treatment agents and as scale inhibitors in the evaporation of sugar juice are obtainable by polycondensation of PA1 (a) from 1 to 99.9 mol % of aspartic acid with PA1 (b) from 99 to 0.1 mol % of fatty acids, polybasic carboxylic acids, anhydrides of polybasic carboxylic acids, polybasic hydroxycarboxylic acids, monobasic polyhydroxycarboxylic acids, alcohols, amines, alkoxylated alcohols and amines, amino sugars, carbohydrates, sugarcarboxylic acids and/or non-proteinogenic aminocarboxylic acids or by polymerizing monoethylenically unsaturated monomers in the presence of polyaspartic acids in the manner of a free-radically initiated graft polymerization.