Method for producing water-absorbing polymer particles by suspension polymerization

US11203005B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Tina Mark · Haßloch, DE
• Thomas Daniel · Waldsee, DE
• Erich Lutz · Altrip, DE
• Stefan Molter · Frankenthal (Pfalz), DE
• Anna Kowalski · Bischofswerda, DE

Key dates

• Filing date: Nov 24, 2015
• Grant date: Dec 21, 2021
• Expiry date: Sep 23, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2333/02
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A process for producing water-absorbing polymer particles by suspension polymerization and thermal surface postcrosslinking, wherein the agglomerated base polymer obtained by suspension polymerization has a centrifuge retention capacity of at least 37 g/g and the thermal surface postcrosslinking is conducted at 100 to 190° C.