Method for producing water-absorbent polymer particles by the polymerization of droplets of a monomer solution

US8697779B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Dennis Lösch · Altrip, DE
• Marco Krüger · Mannheim, DE
• Stefan Blei · Mannheim, DE
• Matthias Weismantel · Bad Orb, DE
• Wilfried Heide · Freinsheim, DE

Key dates

• Filing date: Feb 4, 2008
• Grant date: Apr 15, 2014
• Expiry date: Mar 4, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2982
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution in a surrounding gas phase, the resulting polymer particles having a water content of at least 5% by weight, and being aftertreated thermally in the fluidized state in the presence of steam at a temperature of at least 60° C.