Back to results
US 8,044,158 B2Granted
Method for the production of water-absorbing polymer articles by polymerizing drops of a monomer solution
AssigneeBASF SE
InventorsDennis Lösch, Marco Krüger, Uwe Stueven, Wilfried Heide, Matthias Weismantel, Stefan Blei
Life of this patent
Estimating the term…
Abstract
A process for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution in a surrounding gas phase, wherein the monomer solution comprises at least 0.0002% by weight of oxygen and the oxygen content of the gas phase is at least 0.5% by volume.
Claims12
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 initiator, and
- d) water,
- in a surrounding gas phase in a reaction chamber, wherein the monomer solution comprises at least 0.0002% by weight of oxygen and an oxygen content of the gas phase is at least 0.5% by volume.
2 more elements
Dependencies are inferred from the claim text.