Process for removing residual monomers from water-absorbing polymer particles

US8299207B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Robert Wengeler · Karlsruhe, DE
• Karin Flore · Monsheim, DE

Key dates

• Filing date: Mar 23, 2011
• Grant date: Oct 30, 2012
• Expiry date: Mar 23, 2031

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 removing residual monomers from water-absorbing polymer particles, wherein the water-absorbing polymer particles are thermally aftertreated in a mixer with rotating mixing tools at a temperature of at least 60° C. in the presence of water vapor.