Method for producing aqueous polymer dispersions containing colorants

US7176255B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Klemens Mathauer · Ludwigshafen, DE
• Arno Boehm · Mannheim, DE
• Walter Maechtle · Ludwigshafen, DE
• Peter Rossmanith · Baden, AT
• Sabine Kielhorn-Bayer · Frankenthal (Pfalz), DE
• Klaus Muellen · Cologne, DE
• Ulrike Rohr · Mannheim, DE
• Friedrich-Wilhelm Raulfs · Ludwigshafen, DE
• Ulrike Schloesser · Mannheim, DE
• Wolfgang Schrof · Neuleiningen, DE
• Harutyun Hanciogullari · Schifferstadt, DE
• Karl Siemensmeyer · Bischofswerda, DE
• Paul Delavier · Ludwigshafen, DE
• Ruediger Sens · Mannheim, DE
• Torsten Freund · Schifferstadt, DE
• Takahiro Ikeda · Yokkaichi, JP
• Takanori Wakebe · Mimata, JP

Key dates

• Filing date: Jul 30, 2003
• Grant date: Feb 13, 2007
• Expiry date: Apr 30, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B69/102
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for preparing dye-comprising aqueous polymer dispersions by free-radical aqueous emulsion polymerization of ethylenically unsaturated monomers in the presence of free-radical initiators, in which at least some of the monomers are employed in the form of an oil-in-water emulsion E1 whose disperse phase comprises at least one oil-soluble dye, wherein the disperse phase of E1 is formed essentially of dye-comprising monomer droplets having a diameter<500 nm.The present invention relates in addition to dye-comprising formulations which comprise the dye-comprising polymers of the invention and to pigmented formulations which comprise a polymer of the invention comprising optical brightener.