Evonik Degussa Gmbh

Evonik Operations Gmbh

Stockhausen Superabsorber Gmbh

Rainer Teni

Franck Furno

Mirko Walden

Harald Schmidt

Armin Reimann

Michael Keup

Jörg Issberner

Peter Herbe

Ursula Nielinger

Hans-Peter Krimmer

Peter Werle

Matthias Naumann

Matthias Lobert

Laurent Wattebled

Jorg Harren

Jörg Harren

Markus Henn

This invention relates to a method for producing a water-absorbing polymer, including the following steps: (i) mixing (&#x3b1;1) 0.1 to 99.999 wt % polymerizable, ethylenically unsaturated, acid-group-containing monomers; (&#x3b1;2) 0 to 70 wt % polymerized ethylenically unsaturated, monomers copolymerizable with (&#x3b1;1); (&#x3b1;3) 0.00 1 to 10 wt %, cross-linking agent(s); (&#x3b1;4) 0 to 30 wt % water-soluble polymers; and (&#x3b1;5) 0 to 20 wt % additive(s), wherein the total quantity by weight of (&#x3b1;1) to (&#x3b1;5) amounts to 100 wt %, (ii) radical polymerization while cross-linking, in order to form a hydrogel polymer, (iii) drying the hydrogel polymer, (iv) grinding and sifting the water-absorbing polymer, (v) surface post-cross-linking the hydrogel polymer, and (vi) drying and processing the polymer, wherein, before the admixture of the initiator and the start of radical polymerization, 0.01 to 5 wt % of a surfactant, relative to acrylic acid, 0.01 to 5 wt % foaming agent, are added.

Superabsorbing polymers with rapid absorption properties and method for producing the same

The present invention relates to a process for the preparation of water-absorbing polymer structures, comprising the following process steps: The invention relates also to the water-absorbing polymer structures obtainable by that process, to water-absorbing polymer structures, to a composite comprising a water-absorbing polymer structure and a substrate, to a process for the preparation of a composite, to the composite obtainable by that process, to chemical products, such as foams, molded articles and fibers comprising water-absorbing polymer structures or a composite, to the use of water-absorbing polymer structures or of a composite in chemical products and to the use of a salt in the treatment of the surface of water-absorbing polymer structures.

Water-absorbing polymer structure having improved permeability and absorption under pressure

The present invention relates to a superabsorber composition comprising The invention furthermore relates to a process for the preparation of a superabsorber composition, the superabsorber composition obtainable by this process, a composite comprising the superabsorber composition according to the invention, a process for the production of a composite, the composite obtainable by this process, the use of the superabsorber composition according to the invention in chemical products and chemical products comprising the superabsorber composition according to the invention or the composite according to the invention.

Preparation of highly permeable, superabsorbent polymer structures

The present invention relates to a process for the preparation of water-absorbing polymer structures, comprising the following process steps: I) providing an untreated, water-absorbing polymer structure; and II) bringing the untreated, water-absorbing polymer structure into contact with a salt comprising a divalent or higher-valent cation of a metal and at least one organic base as anion. The invention relates also to the water-absorbing polymer structures obtainable by that process, to water-absorbing polymer structures, to a composite comprising a water-absorbing polymer structure and a substrate, to a process for the preparation of a composite, to the composite obtainable by that process, to chemical products, such as foams, molded articles and fibers comprising water-absorbing polymer structures or a composite, to the use of water-absorbing polymer structures or of a composite in chemical products and to the use of a salt in the treatment of the surface of water-absorbing polymer structures.

The present invention relates to a process for producing postcrosslinked water-absorbing polymeric formations, comprising the steps of contacting water-absorbing polymeric formations Pobtained by polymerization of ethylenically unsaturated acid-functional monomers or salts thereof in the presence of a crosslinker with a fluid Fcomprising a postcrosslinker,

Hydrolytically stable postcrosslinked superabsorbents

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Moers, Germany

Rainer Teni