Evonik Degussa Gmbh

Evonik Stockhausen Gmbh

The Procter Gamble Company

Stockhausen Gmbh & Co Kg

Stockhausen Gmbh

Jorg Harren

Laurent Wattebled

Herbert A Gartner

Marc Hager

Hans-Peter Kohler

Daniel Fricker

Christoph Loick

Harald Plochinger

Richard Mertens

Helmut Brehm

Franck Furno

Markus Henn

Sabine Auernig

Scott J Smith

Emily Charlotte Boswell

Norman Scott Broyles

Ludwig Busam

Robert Earl Magness

Matthias Naumann

Matthias Lobert

Harald Schmidt

Pier-Lorenzo Caruso

Stefan Leininger

Rainer Teni

Harald Plöchinger

Peter Herbe

Anne Ix-Mund

Jörg Issberner

Dominik Gartz

Lisa Maus

Jessica Pillat

The present invention relates to a particulate absorbent polymer material having:

Super-absorbing polymers with rapid absorption properties and method for producing the same

The present invention relates to a water-absorbing composition comprising at least The present invention also relates to a process for producing a water-absorbing composition, the water-absorbing composition obtainable by this process, a composite, a process for producing a composite, the composite obtainable by this process, chemical products such as foams, moldings, fibers, foils, films, cables, sealing materials, liquid-imbibing hygiene articles, carriers for plant and fungal growth regulators, packaging materials, soil additives or building products and also the use of a water-absorbing composition.

Odor and color stable water-absorbing composition

A process for producing a water-absorbing polymer composition, comprising the process steps of (i) mixing (&#x3b1;1) 0.1 to 99.999% by weight of ethylenically unsaturated monomers containing acid groups or salts thereof (&#x3b1;2) 0 to 70% by weight of polymerized, ethylenically unsaturated monomers copolymerizable with (&#x3b1;1), (&#x3b1;3) 0.001 to 10% by weight of one or more crosslinkers, (&#x3b1;4) 0 to 30% by weight of water-soluble polymers, and (&#x3b1;5) 0 to 20% by weight of one or more assistants, where the sum of their weights (&#x3b1;1) to (&#x3b1;5) is 100% by weight, (ii) free-radical polymerization with crosslinking to form a water-insoluble aqueous untreated hydrogel polymer, and surface postcrosslinking the ground hydrogel polymer wherein blowing agents having a particle size of 100 &#x3bc;m to 900 &#x3bc;m are added to the aqueous monomer solution prior to the addition of the initiator and the start of the free-radical polymerization.

Water-absorbing polymer having a high absorption rate

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 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.

Superabsorbent polymer process

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

Thermoplastic starch compositions

A process for producing a water-absorbing polymer comprises: (i) mixing (&#x3b1;1) 0.1-99.99% by weight of ethylenically unsaturated monomers containing acid groups or salts thereof, or ethylenically unsaturated monomers including a protonated or quaternized nitrogen, or mixtures thereof, (&#x3b1;2) 0-70% by weight of ethylenically unsaturated monomers copolymerizable with (&#x3b1;1), (&#x3b1;3) 0.001-10% by weight of one or more crosslinkers, (&#x3b1;4) 0-30% by weight of water-soluble polymers, and (&#x3b1;5) 0-20% by weight of one or more assistants, where the sum of the weights (&#x3b1;1) to (&#x3b1;5) is 100%; (ii) free-radical polymerization with crosslinking to form an untreated hydrogel polymer; (iii) coarse comminution of the untreated hydrogel polymer to give pieces having a diameter from 0.1 mm to 5.0 cm; (iv) cooling and grinding the untreated hydrogel polymer; (v) drying the untreated hydrogel polymer after grinding at a temperature from 85&#xb0; C. to 260&#xb0; C.; (vi) postcrosslinking the hydrogel polymer and (vii) drying the water-absorbing polymer.

Process for producing improved absorbent polymers by means of cryogenic grinding

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

Continuous process for the production of a superabsorbent polymer

The present invention relates to superabsorbent polymer comprising the comprising the free radical polymerization product of an aqueous monomer mixture containing at least one &#x3b1;,&#x3b2;-ethylenically unsaturated monomer; at least one monomer having at least two &#x3b1;,&#x3b2;-ethylenically unsaturated groups; a crosslinking agent having at least two polymerizable double bonds; iron ions in an amount of from about 0.1 to about 3 wppm based on the total weight of the aqueous monomer mixture; and at least one chelating agent in an amount to provide a molar ratio of chelating agent to iron ion of from about 0.8 to about 4.0.

Process for the production of a superabsorbent polymer

The present invention relates to process for the preparation of a superabsorbent polymer comprising the steps of a) subjecting an aqueous monomer mixture containing at least one &#x3b1;,&#x3b2;-ethylenically unsaturated monomer; at least one monomer bearing at least two &#x3b1;,&#x3b2;-ethylenically unsaturated groups; iron ions in an amount of 0.1 to 3 wppm based on the total weight of the aqueous monomer mixture; and at least one chelating agent in an amount to provide a mol ratio of chelating agent to iron ion of 0.8 to 4.0 to free radical polymerization in an reactor to obtain a super-absorbent polymer; and b) recovering the superabsorbent polymer, whereby if the process is continuous and is run in an agitated reactor the upper limit of the mol ratio of chelating agent to iron ion is 4.0 for a throughput of total reaction mixture through the reactor of at most 1.3 kg/h per liter reactor volume.

The invention relates to absorbents for water and aqueous liquids, which absorbents are based on water-swellable, yet water-insoluble polymers wherein zeolites high in silicon have been incorporated ionically and/or as a result of mechanical inclusion.

Water-absorbing polymers having interstitial compounds, a process for their production, and their use

The invention relates to absorvents for water and aqueous liquids, which are vased on water-swell-able, yet water-insoluble polymers wherein cyclodextrin or cyclodextrin derivatives and zeolites high in silicon have been incorporated ionically, covalently and/or as a result of mechanical inclusion.

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Baesweiler, Germany

Jorg Harren