Process for producing water-absorbing polymer particles

US8653215B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Matthias Weismantel · Bad Orb, DE
• Ulrich Riegel · Landstuhl, DE
• Markus Braun · Mannheim, DE
• Martin Wendker · Ludwigshafen am Rhein, DE
• Thomas Gieger · Ludwigshafen, DE

Key dates

• Filing date: May 23, 2012
• Grant date: Feb 18, 2014
• Expiry date: Aug 10, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F222/103
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for producing water-absorbing polymer particles by polymerizing an aqueous monomer solution in a kneader having at least two shafts in axially parallel rotation, wherein the reaction mixture is transported in axial direction and the region at the start of the kneader is trace-heated.