Evonik Stockhausen Gmbh

Evonik Degussa Gmbh

The Procter Gamble Company

Stockhausen Gmbh

Evonik Stockhuasen Gmbh

Evonik Operations Gmbh

Jörg Harren

Herbert A Gartner

Marc Hager

Hans-Peter Kohler

Daniel Fricker

Harald Plöchinger

Harald Schmidt

Franck Furno

Laurent Wattebled

Jörg Issberner

Stephan Ramlow

Emily Charlotte Boswell

Hans-Peter Krimmer

Richard Mertens

Norman Scott Broyles

Ludwig Busam

Peter Werle

Robert Earl Magness

Helmut Brehm

Matthias Lobert

Frank Loeker

Christoph Loick

Pier-Lorenzo Caruso

Mirko Walden

Stefan Leininger

Scott Smith

Waldemar Inger

Manfred Van Stiphoudt

Rainer Teni

Herbert Vorholt

Markus Henn

Peter Herbe

Ursula Nielinger

Anne Ix-Mund

Dominik Gartz

Henry Rudolph

Rüdiger Hose

Stefan Derstappen

Axel Busch

Michael Lange

Jessica Pillat

Kai Hebben

Udo Klapperich

Andreas Kerkmann

Lisa Maus

Thomas Hoefges

Frank Soppe

Sabine Auernig

Matthias Naumann

Dirk Wagner

Herbert Alfons Gartner

Harald PLÖCHINGER

Dieter Oppenberg

The present invention relates to a water-absorbing composition comprising water-absorbing polymer structures, on the surface of which is at least one tannin fraction which has a number-average molecular weight, determined in accordance with the test method described herein, of at least 1,000 g/mol, which has a weight-average molecular weight, determined in accordance with the test method described herein, of at least 1,000 g/mol, or which is a hydrolysable gallotannin. The present invention also relates to a process for the preparation of a water-absorbing composition, the water-absorbing composition obtainable by this process, a composite, a process for the production of a composite, the composite obtainable by this process, chemical products, such as, for example, hygiene articles, the use of a water-absorbing composition or of a composite and the use of a tannin fraction.

Superabsorbent composition with tannins for odor control

The present invention relates to improvements in prevention of discoloration of thermoplastic starch materials and their blends with other thermoplastic materials.

Thermoplastic starch compositions

The invention relates to crosslinked polymerizates which are capable of absorbing, which are based on partially neutralized, monoethylenically unsaturated monomers that carry acidic groups, which exhibit improved properties, in particular, with regard to their ability to transport liquids when in a swollen state, and which have been subsequently crosslinked on the surface thereof with a combination consisting of an organic crosslinker compound, with the exception of polyols, and of a cation provided in the form of a salt in an aqueous solution.

Powdery, cross-linked absorbent polymers, method for the production thereof, and their use

The present invention relates to a continuous process for the production of a superabsorbent polymer comprising providing an acidic liquid aqueous monomer mixture containing dissolved oxygen; continuously feeding the aqueous monomer mixture to a reactor; introducing a source of carbonate or hydrogen carbonate into the aqueous monomer mixture prior to entry into the reactor thereby forming a gas phase comprising carbon dioxide and at least a part of the dissolved oxygen, the gas phase being dispersed in the liquid phase; subjecting the gas/liquid mixture to at least partial phase separation immediately prior to or after entry into the reactor and at least partially removing the separated gaseous phase; subjecting the liquid phase in the reactor to free-radical polymerization to obtain the superabsorbent polymer, and continuously removing the superabsorbent polymer from the reactor.

Continuous process for the production of a superabsorbent polymer

The present invention relates to a process for the production of a superabsorber, comprising as steps providing a water-absorbing polymer structure, bringing the water-absorbing polymer structure into contact with a modifying agent, preferably a modifying agent, and the further treatment of the water-absorbing polymer structure which has been brought into contact with the modifying agent. The further treatment is carried out at least partly in a rotating container. The invention furthermore relates to a device for the production of a superabsorber, superabsorbers, a composite, a process for the production of a composite, the composites obtainable by this process, chemical products, such as foams, shaped articles or fibers, and the use of a superabsorber.

Process for gentle mixing and coating of superabsorbers

The present invention relates to a process for the production of a superabsorbent polymer comprising preparing an aqueous mixture of monomers selected to provide after polymerization a superabsorbent polymer; feeding said monomer mixture to a reactor; subjecting the aqueous monomer mixture in the reactor to free-radical polymerization to obtain a superabsorbent polymer gel; removing the superabsorbent polymer gel from the reactor; and drying the superabsorbent polymer gel. Where at least one off-gas stream removed from any stage of the process is subjected to scrubbing with a basic aqueous solution prior to venting to obtain an aqueous scrubber solution that is at least partially recycled to any of the above steps of the process.

Process for the production of a superabsorbent polymer

The present invention relates to a process for the production of a superabsorbent polymer comprising preparing an aqueous mixture of monomers selected to provide after polymerization a superabsorbent polymer; feeding said monomer mixture to a reactor; subjecting the aqueous monomer mixture in the reactor to free-radical polymerization to obtain a superabsorbent polymer gel; removing the superabsorbent polymer from the reactor; and working-up the superabsorbent polymer removed from the reactor to obtain a final product, whereby a basic aqueous medium comprising carbonate and/or hydrogen carbonate is fed to the superabsorbent polymer gel.

A process for producing an absorbent polymer structure (Pa) by treating the outer portion of an untreated absorbent polymer structure (Pu1). The process includes the step of bringing the outer portion of the untreated absorbent polymer structure (Pu1) into contact with an aqueous solution including at least one chemical cross-linker and at least one inorganic compound in dispersed colloidal form. The process also includes the step of heating the absorbent polymer structure, of which the outer portion has been brought into contact with the aqueous solution, at a temperature within a range from about 40 to about 300&#xb0; C., so that the outer portion of the absorbent polymer structure is more strongly cross-linked in comparison to the inner portion and the inorganic compound is at least partly immobilized in the outer portion of the absorbent polymer structure.

Absorbent polymer structure with improved retention capacity and permeability

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

Water-absorbing, antimicrobial polymer particles comprising from about 1 to about 500 ppm, based on the particles, of a silver ion based on a silver salt, wherein the silver salt has a solubility product of at least about 1&#xd7;10(mol/l); at least about 10 wt. %, based on the polymer particle, of a water-absorbing polymer based on: (&#x3b1;1) from about 50 to about 99.99 wt. % polymerized, ethylenically unsaturated, acid groups-containing monomers or salts thereof, (&#x3b1;2) 0 to about 40 wt. % polymerized, mono-ethylenically unsaturated monomers polymerizable with &#x3b1;1, (&#x3b1;3) from about 0.01 to about 5 wt. %, preferably from about 0.1 to about 3 wt. % of one or more crosslinkers, (&#x3b1;4) 0 to about 30 wt. % of a water soluble polymer and (&#x3b1;5) 0 to about 20 wt. % of auxiliaries, the concentration of the silver ion based on a silver salt in at most about 90 vol. % of the particles is less than about 0.01 ppm.

Water-absorbing polymer particles delaying the decomposition of body fluids, composites comprising these and use thereof

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Krefeld, Germany

Jörg Harren