Method for producing permeable water-absorbing polymer particles through polymerization of drops of a monomer solution

US8865828B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Thomas Daniel · Waldsee, DE
• Uwe Stueven · Bad Soden, DE
• Marco Krüger · Mannheim, DE
• Stefan Blei · Mannheim, DE
• Francisco Javier Lopez Villanueva · Schifferstadt, DE
• Norbert Herfert · Charlotte, US

Key dates

• Filing date: Nov 18, 2009
• Grant date: Oct 21, 2014
• Expiry date: Feb 15, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2333/02
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution in a surrounding gas phase, wherein the polymer particles are coated with a permeability improver.