Optically brightened plastics for optically brightening paper-coating compounds and paper-coating compounds optically brightened in this manner

US6387296B1 · kind B1 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Udo Eckstein · Cologne, DE
• Joachim Konig
• Fritz Puchner · Cologne, DE
• Ulrich Feldhues · Bensberg, DE
• Matthias Kocher · Overath, DE
• Uwe Vogt · Monheim, DE
• Eckhard Wenderoth · Leverkusen, DE

Key dates

• Filing date: Jun 27, 1997
• Grant date: May 14, 2002
• Expiry date: Jun 27, 2017

Classification

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

Abstract

Paper coating slips having high whiteness, high greying limit and high lightfastness can be prepared with the aid of whitened finely divided plastics.