Process for producing water-absorbing polymer particles

US9486777B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Monte Peterson · Pearland, US
• John Perry Guentzel · Beach City, US
• Gregory Boykin · Saraland, US
• Leo Van Miert · Kapellen, BE
• Rene Callot · Ekeren, BE
• Oskar Stephan · Hockenheim, DE
• Rüdiger Funk · Niedernhausen, DE
• Matthias Weismantel · Bad Orb, DE

Key dates

• Filing date: Aug 27, 2013
• Grant date: Nov 8, 2016
• Expiry date: Jun 9, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2333/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a process for producing water-absorbing polymer particles, comprising polymerization, drying the resulting polymer gel on a through circulation belt dryer, crushing the dried polymer gel, pre-grinding, separating of incompletely dried particles with a perforated plate, grinding and classifying the resulting polymer particles.