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US 2010/0062932 A1Published application
Method for Producing Water-Absorbent Polymer Particles by the Polymerization of Droplets of a Monomer Solution
AssigneeBASF SE a German corporation
InventorsDennis Lösch, Marco Krüger, Stefan Blei, Matthias Weismantel, Wilfried Heide
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Abstract
A process for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution in a surrounding gas phase, said monomer solution comprising at least one azo compound and at least one persulfate, the resulting polymer particles having a water content of at least 5% by weight, and being aftertreated thermally at a temperature of at least 100° C. for at least 5 minutes.
Claims10
A process for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution comprising
- a) at least one ethylenically unsaturated monomer,
- b) optionally a crosslinker,
- c) at least one azo compound,
- d) at least one persulfate and
- e) water,
- in a surrounding gas phase, wherein the resulting polymer particles have a water content of at least 5% by weight and are aftertreated thermally at a temperature of at least 100° C. for at least 5 minutes.
3 more elements
Dependencies are inferred from the claim text.