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

US11458665B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Monica Haag · Ludwigshafen, DE
• Stephan Deuerlein · Ludwigshafen, DE
• Holger Barthel · Oftersheim, DE
• Volker Klock · Ludwigshafen, DE
• Roland Krauss · Neustadt, DE

Key dates

• Filing date: Dec 15, 2017
• Grant date: Oct 4, 2022
• Expiry date: Nov 11, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2333/06
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

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.