Process for producing water-absorbing polymer particles

US8362174B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Rüdiger Funk · Niedernhausen, DE
• Jürgen Schröder · Ludwigshafen, DE
• Thomas Pfeiffer · Kumhausen, DE
• Matthias Weismantel · Bad Orb, DE
• Stefan Blei · Mannheim, DE

Key dates

• Filing date: Feb 21, 2011
• Grant date: Jan 29, 2013
• Expiry date: May 25, 2031

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F26B17/04
• 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 roughness of at least 0.9 μm.