Method for grading water-absorbent polymer particles

US7967148B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Uwe Stueven · Bad Soden, DE
• Rüdiger Funk · Niedernhausen, DE
• Matthias Weismantel · Bad Orb, DE
• Karl J. Possemiers · Schilde, BE
• Filip Mees · Lake Jackson, US

Key dates

• Filing date: Sep 24, 2007
• Grant date: Jun 28, 2011
• Expiry date: Jan 1, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2300/14
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process for classifying water-absorbing polymer beads, wherein screens having different mesh sizes are used before and after the postcrosslinking to remove the oversize.