Invention Grant
- Patent Title: Method for producing water-absorbent polymer particles with a higher permeability by polymerising droplets of a monomer solution
- Patent Title (中): 通过聚合单体溶液的液滴生产具有较高渗透性的吸水聚合物颗粒的方法
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Application No.: US12373621Application Date: 2007-07-11
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Publication No.: US08124229B2Publication Date: 2012-02-28
- Inventor: Uwe Stueven , Matthias Weismantel , Wilfried Heide , Marco Krüger , Volker Seidl , Stefan Blei , Dennis Loesch , Rüdiger Funk , Annemarie Hillebrecht
- Applicant: Uwe Stueven , Matthias Weismantel , Wilfried Heide , Marco Krüger , Volker Seidl , Stefan Blei , Dennis Loesch , Rüdiger Funk , Annemarie Hillebrecht
- Applicant Address: DE Ludwigshafen
- Assignee: BASF SE
- Current Assignee: BASF SE
- Current Assignee Address: DE Ludwigshafen
- Agency: Marshall, Gerstein & Borun LLP
- Priority: EP06117491 20060719
- International Application: PCT/EP2007/057081 WO 20070711
- International Announcement: WO2008/009598 WO 20080124
- Main IPC: B32B1/00
- IPC: B32B1/00 ; C08F20/06
Abstract:
A process for preparing water-absorbing polymer beads with high permeability by polymerizing droplets of a monomer solution in a gas phase surrounding the droplets, wherein the monomer solution comprises at least 0.5% by weight of a crosslinker, based on the monomer, the polymerization in the droplet takes place in homogeneous phase, and the polymer beads have a mean diameter of at least 150 μm.
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