Method for the production of water-absorbing polymer articles by polymerizing drops of a monomer solution

US8044158B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

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

Key dates

• Filing date: Aug 25, 2008
• Grant date: Oct 25, 2011
• Expiry date: Nov 10, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F220/06
• 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, wherein the monomer solution comprises at least 0.0002% by weight of oxygen and the oxygen content of the gas phase is at least 0.5% by volume.