Basf Se Corporation

Holger Barthel

Matthias Weismantel

Rüdiger Funk

Norbert Herfert

Uwe Stueven

Oskar Stephan

Martin Wendker

Reiner Witt

Stephan Deuerlein

Volker Klock

Monica Haag

Roland Krauss

Karin Flore

Jeff Vogt

William G-J Chiang

Josef Vogt

A single-screw extruder for changing a morphology of superabsorbent polymer gel. The single-screw extruder has an input aperture, a channel, a screw and an output aperture. The screw in the invention has a first pitch value of a pitch of the screw flights along the conveying zone of the channel and, following in conveying direction, has a second pitch value of the pitch of the screw flights along the conveying zone of the channel, where the second pitch value is smaller than the first pitch value.

Single-shaft extruder and use of a single-shaft extruder, and method for altering morphology of a superabsorbent polymer, specifically an SAP polymer gel, using a single-shaft extruder

A single-screw extruder for changing a morphology of a superabsorbent polymer, specifically a polymer gel. The single-screw extruder has an input aperture, a channel, a screw and an output aperture. The screw has a pitch value of a pitch of the screw flights along the conveying zone of the channel, where the channel has a mixing-element arrangement with at least one mixing element which protrudes into the channel of the single-screw extruder and which is configured for the mixing of the SAP polymer gel.

Single-shaft extruder and use of a single-shaft extruder, and method for altering morphology of a superabsorbent polymer gel using a single-shaft extruder

A process for preparing water-absorbing polymer particles by spraying a liquid onto water-absorbing polymer particles by means of at least one thermally insulated and/or trace-heated spray nozzle in a mixer.

Method for coating water-absorbing polymer particles

A process for preparing water-absorbing polymer particles by spraying a liquid below the product bed surface by means of at least one spray nozzle in a mixer with moving mixing tools.

A process for preparing water-absorbing polymer particles by coating water-absorbing polymer particles with a particulate solid in a mixer, wherein the particulate solid is dispersed by means of a gas stream and the supply of the dispersed particulate solid in the mixer ends below the product bed surface.

Growing community of inventors

Oftersheim, Germany

Holger Barthel