Process for fixing disruptive substances in papermaking

US5688371A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Joachim Konig
• Jurgen Kopp · Odenthal, DE
• Udo-Winfried Hendricks · Odenthal, DE
• Jurgen Reiners · Leverkusen, DE
• Peter Nowak · Dormagen, DE

Key dates

• Filing date: Jun 18, 1996
• Grant date: Nov 18, 1997
• Expiry date: Jun 18, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S162/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Process for fixing anionic interfering substances in papermaking process by the addition of cationic polycondensation products obtained by reacting PA1 a) a monofunctional or polyfunctional amine having one or more primary and/or secondary and/or tertiary amino groups with PA1 b) cyanamide, dicyandiamide, guanidine or biguanidine, wherein up to 50 mol. % of cyanamide, dicyandiamide or biguanidine may be replaced with a dicarboxylic acid or a mono- or diester thereof, with elimination of ammonia, optionally in the presence of a catalyst, optionally together with other auxiliaries.