Method for producing water-absorbing polymer particles

US8789774B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Uwe Stueven · Bad Soden, DE
• Rüdiger Funk · Niedernhausen, DE
• Matthias Weismantel · Bad Orb, DE
• Dominicus van Esbroeck · Nanjing, CN
• Ronny De Kaey · Mortsel, BE

Key dates

• Filing date: Jun 1, 2010
• Grant date: Jul 29, 2014
• Expiry date: Jul 25, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2333/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for producing water-absorbing polymer particles, wherein an aqueous polymer gel is applied by means of a swivel belt to the conveyor belt of a forced-air belt drier, and the swivel belt, proceeding from one end position, is accelerated through a first pivot angle to an angular speed v1, decelerated through a second pivot angle to an angular speed v2 and decelerated through a third pivot angle to the other end position.