Invention Grant
- Patent Title: Method for producing water-absorbent polymer particles with a higher permeability by polymerising droplets of a monomer solution
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Application No.: US15299922Application Date: 2016-10-21
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Publication No.: US10208149B2Publication Date: 2019-02-19
- Inventor: Uwe Stueven , Matthias Weismantel , Wilfried Heide , Marco Krüger , Volker Seidl , Stefan Blei , Dennis Loesch , Rüdiger Funk , Annemarie Hillebrecht
- Applicant: BASF SE
- Applicant Address: DE Ludwigshafen
- Assignee: BASF SE
- Current Assignee: BASF SE
- Current Assignee Address: DE Ludwigshafen
- Agency: Marshall, Gerstein & Borun LLP
- Priority: EP061174892 20060719
- Main IPC: C08F222/20
- IPC: C08F222/20 ; A61L15/60 ; C08F2/34 ; C08F220/06 ; A61L15/24 ; B29B9/10 ; C08F222/10 ; C08F222/38 ; B29K33/04
Abstract:
A process for preparing water-absorbing polymer beads with high permeability by polymerizing droplets of a monomer solution, comprising monomers bearing acid groups, in a gas phase surrounding the droplets, wherein the monomer solution comprises polyvalent cations and the polymer beads have a mean diameter of at least 150 μm.
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