Process for producing water-absorbing polymer particles with improved permeability

US8742026B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Matthias Weismantel · Bad Orb, DE
• Markus Braun · Mannheim, DE

Key dates

• Filing date: Mar 2, 2012
• Grant date: Jun 3, 2014
• Expiry date: Jul 31, 2032

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 with improved permeability, comprising the steps of polymerization, drying, grinding, classification and thermal surface postcrosslinking, with pneumatic conveying between grinding and classification.