Use of brighteners for the preparation of coating slips

US7258815B2 · kind B2 · utility

Inventors

• Karl-Heinz Drenker · Solingen, DE
• Heinz Giesecke · Leverkusen, DE
• Bernhard Hunke · Hennef (Sieg), DE
• Bernd Hauschel · Leverkusen, DE
• Reiner Gottschalk
• Claudia Hundertmark · Bergheim, DE

Key dates

• Filing date: Apr 16, 2003
• Grant date: Aug 21, 2007
• Expiry date: Apr 16, 2023

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21H21/30
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The use of optical brighteners of the formula (II):in which and the other substituents have the meaning stated in the description, for brightening aqueous coating slips comprising at least one latex binder and at least one synthetic co-binder differing therefrom.