Paper finishing process using polyisocyanates with anionic groups and cationic compounds

US6022449A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Bernhard Jansen · Cologne, DE
• Joachim Konig
• Peter Nowak · Dormagen, DE

Key dates

• Filing date: Nov 25, 1997
• Grant date: Feb 8, 2000
• Expiry date: Nov 25, 2017

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21H23/76
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The use of water-dispersible polyisocyanates with anionic and/or potentially anionic groups and cationic and/or potentially cationic compounds in paper finishing leads not only to higher retention but also to improved dry and wet strength and sizing.