Chemically modified proteins and colorant formulations containing the same

US5124438A · kind A · utility

Assignee

• BASF SE

Inventors

• Ralf Brueckmann · Putlitz, DE
• Johannes P. Dix · Schifferstadt, DE
• Manfred Herrmann
• Herbert Leiter · Wetzlar, DE
• Norbert Zimmermann · Waldsee, DE

Key dates

• Filing date: Jan 12, 1990
• Grant date: Jun 23, 1992
• Expiry date: Jan 12, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B67/0085
• WIPO field: Biotechnology
• WIPO sector: Chemistry

Abstract

Chemically modified proteins obtainable by reacting casein, collagen, gelatin, albumin or mixtures thereof PA1 (a) with 0.5 to 15% by weight of chlorine or of a compound which liberates chlorine under the reaction conditions, in an aqueous medium at a pH of from 0 to 7 or PA1 (b) with 0.5 to 50% by weight of a non-aromatic mono- or disulfonic acid which contains in its organic radical one or more groups or structural features which react with nucleophiles, in an aqueous medium at a pH of from 6 to 14, are used as dispersants in colorant formulations.