Patent · US Active

Method for producing post-cured water-absorbent polymer particles with a higher absorption by polymerising droplets of a monomer solution

US8202957B2 · kind B2 · utility

5Cited by

3References

7Claims

0Family size

Assignee

BASF SE

Inventors

Uwe Stueven · Bad Soden, DE
Matthias Weismantel · Bad Orb, DE
Wilfried Heide · Freinsheim, DE
Marco Krüger · Mannheim, DE
Volker Seidl · Mannheim, DE
Stefan Blei · Mannheim, DE
Dennis Loesch · Altrip, DE
Rüdiger Funk · Niedernhausen, DE
Annemarie Hillebrecht · Bad Reichenhall, DE

Key dates

Filing date	Jul 9, 2007
Grant date	Jun 19, 2012
Priority date	—
Expiry date	Mar 5, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2982
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for preparing postcrosslinked water-absorbing polymer beads with high absorption by polymerizing droplets of a monomer solution in a gas phase surrounding the droplets, wherein the solids content of the monomer solution is at least 35% by weight and the polymer beads have a mean diameter of at least 150 μm.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.