Fluorescent whitening agent compositions

US8920605B2 · kind B2 · utility

Assignee

• BLANKOPHOR GMBH & CO. KG · DE

Inventors

• Bernhard Hunke · Hennef (Sieg), DE
• Andrei Tauber · Cologne, DE
• Michael Kraemer · Nidderau, DE
• Gunter Klug · Langenfeld, DE

Key dates

• Filing date: Mar 22, 2012
• Grant date: Dec 30, 2014
• Expiry date: Mar 22, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B67/0034
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a composition suitable for optically whitening paper or board, wherein the composition contains specified bis-triazinylamino-stilbene fluorescent whitening agents with carboxylic acid and/or sulfonic acid groups. The composition can be used for whitening paper in the pulp, size press or by coating.