Modified cationic polymers, their preparation and their use in papermaking

US6716311B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Jürgen Decker · Speyer, DE
• Norbert Mahr · Schifferstadt, DE
• Anton Esser · Mannheim, DE
• Hubert Meixner · Ludwigshafen, DE
• Rainer Dyllick-Brenzinger · Speyer, DE
• Martin aus dem Kahmen · Ludwigshafen, DE
• Martin Gercke · Darmstadt, DE

Key dates

• Filing date: May 4, 2001
• Grant date: Apr 6, 2004
• Expiry date: May 4, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/64
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to modified cationic polymers which can be obtained by reacting (a) water-soluble, polymeric compounds containing NH groups with (b) compounds which are at least bifunctional with regard to NH groups, which contain at least one alkyl radical or alkenyl radical having at least 8 C atoms, and which contain, as a functional group, a halohydrin, epoxide, carboxyl, chloroformate or isocyanate group or a halogen atom. The invention also relates to a method for producing the polymers by reacting the compounds of groups (a) and (b), and to the use of the modified cationic polymers during the production of paper as fixing agents for papermaking stock containing interfering substances.