Basf Se Corporation

Basf Aktiengesellschaft

Volker Seidl

Matthias Weismantel

Uwe Stueven

Dennis Loesch

Wilfried Heide

Stefan Blei

Rüdiger Funk

Marco Krüger

Annemarie Hillebrecht

Dennis Lösch

Carolin Nadine Dücker

Thomas Wettling

Stefan Bruhns

Martin Ruebenacker

Heinrich Sack

Martin Karches

Volker Frenz

Christian Hubert Weidl

Werner Bochnitschek

Dieter Stuetzer

Franz Weber

Silke Biedasek

Hans-Ulrich Moritz

Oliver Labisch

Paola Uribe Arocha

Uwe Rachwalsky

Marco-Christian Volland

Dieter Reimer

Carolin Nadine Duecker

Alexandra Wiedemann

Werner Pauer

Corinna Naundorf

Mohammed Abboud

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 &#x3bc;m.

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

A process for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution, where the monomer solution comprises at least two initiators, one of the initiators is a peroxide with the exception of persulfate, and the molar ratio of peroxide to further initiator is at least 1:8, the water-absorbing polymer particles themselves, and hygiene articles comprising these water-absorbing polymer particles.

Method for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution

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 a water-insoluble inorganic salt is suspended in the monomer solution and the polymer beads have a mean diameter of at least 150 &#x3bc;m.

Method for producing water-absorbent polymer particles with a higher permeability by polymerizing droplets of a monomer solution

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 &#x3bc;m.

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

Water-absorbing polymeric particles are produced by spray polymerization of a monomer solution in a process wherein the monomer solution is spray dispensed and at least one crosslinker accumulates in the region of the droplet surface, and are useful in hygiene articles.

Production of polymers by spray polymerization

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

A process for producing a polymer powder comprising vinylformamide units by free radical polymerization of an aqueous solution of N-vinylformamide and if appropriate other monomers and drying the polymer which comprises an aqueous monomer solution comprising N-vinylformamide and at least one polymerization initiator being spray dispensed as an aerosol or dropletized at the top of a heatable tower-shaped reactor, then polymerizing the aerosol or droplets in an inert gas atmosphere to form a finely divided solid and discharging the finely divided polymer from the reactor.

Process for production of polymer powders containing vinylformamide units

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 &#x3bc;m.

In a process for dropletizing a liquid by means of a dropletizer plate at least the underside of the dropletizer plate has at least in part a contact angle of at least 60&#xb0; with regard to the liquid to be dropletized.

Dropping method for liquids

Process for producing polymers by spray polymerization wherein the monomer solution is dispersed in a hydrophobic liquid, the use of the polymers for thickening liquids and also an apparatus for producing polymers by spray polymerization.

Method for producing polymers by dispersion polymerization

A process for producing water-absorbing polymeric particles by dropletization polymerization in the gas phase, which comprises drying the polymeric particles after the polymerization in a fluidized bed, the water-absorbing polymeric particles themselves, hygiene articles comprising these water-absorbing polymeric particles and also apparatus for implementing the process.

Production of water-absorbing polymeric particles by dropletization polymerization in the gas phase

The present invention relates to a process for preparing polyisobutene by polymerizing isobutene using an inert diluent and a halogen-containing Lewis acid as a catalyst, wherein the isobutene in the form of droplets is contacted with the Lewis acid in a polymerization apparatus.

Method for producing polyisobutene

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Mannheim, Germany

Volker Seidl