Composition and process for whitening paper

US8354041B2 · kind B2 · utility

Assignee

• BLANKOPHOR GMBH & CO. KG · DE

Inventors

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

Key dates

• Filing date: Jun 10, 2009
• Grant date: Jan 15, 2013
• Expiry date: Jun 10, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2211/1059
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A composition suitable for surface treatment of paper, wherein the composition contains a specified fluorescent whitening agent with alkylsulfonic acid groups, a salt of a bivalent cation, and a carrier. The composition is used for whitening paper, in particular in the size press.