Method for the production of water absorbent polymer particles by polymerizing drops of a monomer solution

US8013087B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Dennis Lösch · Altrip, DE
• Marco Krüger · Mannheim, DE
• Achim Stammer · Freinsheim, DE

Key dates

• Filing date: Oct 2, 2007
• Grant date: Sep 6, 2011
• Expiry date: Oct 2, 2027

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S526/93
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for preparing water-absorbing polymer beads by polymerizing droplets of a monomer solution in a gas phase surrounding the droplets, the initiator being added to the monomer solution from 0.5 to 60 seconds before the droplets are generated.