Dyestuff-containing aqueous dispersions

US5616644A · kind A · utility

Assignee

• BASF SE

Inventors

• Bernhard Schlarb · Ludwigshafen, DE
• Kurt Wendel
• Helmut Bellaire · Ludwigshafen, DE
• Karin H. Beck · Ludwigshafen, DE

Key dates

• Filing date: Jun 28, 1995
• Grant date: Apr 1, 1997
• Expiry date: Jun 28, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D11/16
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Dyestuff-containing aqueous dispersions obtainable by PA0 a) preparation of at least two copolymers A) and B) in an organic solvent by solution polymerization, PA1 A) containing from 5 to 50 % by weight, based on A), of an ethylenically unsaturated acid and PA1 B) being essentially free of ethylenically unsaturated acids and the solution polymerization of the copolymers A) or B) being carried out in the presence of the other respective copolymer A) or B) already prepared, PA0 b) addition of a dyestuff before, during or after the solution polymerization, PA0 c) dispersion of the resulting solution in water and PA0 d) removal of the organic solvent if desired, are described.