Chemische Fabrik Stockhausen Gmbh

Stockhausen Gmbh & Co Kg

Stockhausen Gmbh

Ashland Licensing and Intellectual Property LLC

Evonik Stockhuasen Gmbh

Evonik Degussa Gmbh

Helmut Brehm

Richard Mertens

Kurt Dahmen

Hans-Georg Hartan

Helmut Klimmek

Jorg Harren

Dolf Stockhausen

Bernfried A Messner

Jörg Harren

Jochen Houben

Erich Kuster

Gerd Jonas

Thomas Muller

Stephan Ramlow

Klaus Pflueger

Leonardus Strijbos

Horst Kilian

Andreas Kerkmann

Hans-Bernhard Eikmeier

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 invention relates to water-soluble, preferably powder-form polymer compositions which are obtained by continuous polymerization of at least one unsaturated monomer. At least one parameter that influences the polymerization is varied according to a recurrent pattern. The invention also relates to the use of the inventive polymer compositions and to a method for producing them.

Polymerizate composition and a method for producing the same

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 present invention relates to powdered, crosslinked polymer compositions, containing

Polymer composition and a method for producing the same

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.

A process for producing water-soluble, cationic polyelectrolytes is described, wherein the polymerization of the water-soluble monomers is initiated at low temperatures using a combination of UV light, photoinitiator and a redox system, and is characterized in that the redox system is capable of initiating the polymerization only at temperatures higher than or equal to 20&deg; C. The polymers have a high molecular weight and a low content of residual monomer.

Method for producing cationic polyelectrolytes

The present invention relates to alkoxy-groups-containing copolymers of a) 1 to 99%-wt. water soluble ethylenically unsaturated, acid-groups-containing monomers, b) 1 to 50%-wt. monomers having a polyalkoxy sequence and c) 0 to 60%-wt. water soluble monomers which are copolymerizable with a) and b); and to the use of said copolymers for retanning leathers previously tanned by a mineral or combined method. The leathers treated with the retanning agents according to the invention in particular stand out for an improved fullness and good grain tightness. The acid groups of monomers a) preferably are carboxyl groups.

Alkoxy group containing copolymers and their use in retanning leather

The present invention relates to superabsorbent cross-linked polymers for watery liquids, which are built-up of partially neutralized monomers having monoethylenlcally unsaturated acid groups, optionally further monomers copolymerizable therewith, as well as polymers optionally suitable as graft basis, and which can be manufactured by using a cross-linker/monomer combination of

Fluid-absorbing polymers, processes used in their production and their

Powdery polymers capable of absorbing aqueous liquids, a process for

Powder-form polymers which absorb, even under pressure, aqueous liquids

Copolymers and their use in the treatment of leather

Copolymers of allyliminodiacetic acid with unsaturated carboxylic acids

Process for the production of water-swellable products using superfines

The invention relates to a cross-linked, water-absorbent polymer obtainable by the polymerization of a mixture consisting of a) 60-99%-wt. unsaturated, polymerizable monomers with acid groups which are neutralized to the extent of at least 30 mol-%, b) 0-37%-wt. monomers copolymerizable with a), c) 0.1-3.0%-wt. of a cross-linking agent and d) 0-10%-wt. of a water-soluble polymer, in which polymerization is conducted with a redox catalyst system containing formamidine sulfinic acid as reducing agent. The polymer is distinguished by a retention of greater than or equal to 28 g 0.9% aqueous NaCl-solution per 1 g of polymer, an absorption of greater than or equal to 26 g 0.9% aqueous NaCl-solution per 1 g of polymer at a load of 20 g/cm.sup.2 and a residual monomer content of less than 700 ppm, and preferably less than 500 ppm. The invention also relates to the use of this polymer in the production of hygiene articles.

Cross-linked, water-absorbing polymer and its use in the production of

Process for the agglomeration of water-swellable polymers by means of

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Krefeld, Germany

Helmut Brehm