Process for producing water-absorbing particles

US8541528B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Rüdiger Funk · Niedernhausen, DE
• Thomas Pfeiffer · Kumhausen, DE
• Matthias Weismantel · Bad Orb, DE
• Stefan Blei · Mannheim, DE
• Wilfried Heide · Freinsheim, DE
• Volker Braig · Weinheim, DE
• Thomas Gieger · Ludwigshafen, DE
• Andreas Brockmeyer · Zwingenberg, DE

Key dates

• Filing date: Feb 22, 2011
• Grant date: Sep 24, 2013
• Expiry date: Jan 3, 2032

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F26B17/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for producing water-absorbing polymer particles, wherein an aqueous polymer gel is dried in a forced-air belt drier on a circulating conveyor belt and the surface of the conveyor belt has a multitude of elevations or depressions which are suitable for restricting the mobility of the aqueous polymer gel in transverse direction.