Stockhausen Gmbh & Co Kg

Chemische Fabrik Stockhausen Gmbh

Evonik Stockhausen Gmbh

Edgar Herrmann

Kurt Dahmen

Richard Mertens

Jochen Houben

Jörg Issberner

Georg Werner

Christoph Bruhn

Dagmar Kersten

Carmen Knobelsdorf

Michael Schuemann

Waldemar Dohrn

Reiner Buettner

Klaus Pfluger

Ingo Notz

A process for producing cellulosic formed materials having high water retention capacity according to the dry-wet extrusion process by producing a solution of 5 to 20 wt.-% of cellulose in a hydrous tertiary amine oxide, extruding the solution, stretching the extrudate in a non-precipitating medium, and precipitating the formed materials in an aqueous or alcoholic precipitating bath, characterized by extruding a solution including 0.01 to 250 wt.-%, relative to cellulose, of at least one superabsorbent polymer having a grain size of &#x2266;100 &#x3bc;m. The fibers, films, and composite materials being formed are remarkable for their high water retention capacity and are suitable in the production of hygiene products, baby or disposable diapers, sanitary towels, tampons, incontinence articles, absorbent patches, wound dressings, strappings, bandages, absorbent cloths, moisture-absorbing clothing, bed mattings, filter materials or filters, packaging materials, or cable sheathings.

Method for producing cellulose shaped bodies with super-absorbent properties

The invention relates to absorbent polymers based on optionally partially neutralised, monoethylenically unsaturated, acid group-carrying monomers. The surfaces of said polymers are re-cross-linked. The inventive polymers also have cyclodextrines and/or cyclodextrine derivatives which are covalently and/or ionically bonded and/or included therein.

Water-absorbing polymers with supramolecular hollow molecules, method for producing them and use of the same

Water-absorbing polymers having supramolecular hollow molecules, method for producing them and use of the same

Powder-form cross-linked polymers capable of absorbing aqueous liquids

The present invention relates to a process for producing water-absorbing sheet-like materials which consist of a water-absorbent polymer and a prefabricated nonwoven fabric, wherein the prefabricated nonwoven fabric is impregnated with a solution comprising partially neutralized acrylic acid and at least one cross-linking agent and is squeezed to a certain coating amount, and the monomer solution thus applied is characterized in that the polymerization is carried out in the presence of radical initiators which cannot be activated thermally and at least one thermally activatable radical former used in addition. The additional use of a thermally activatable radical former in the polymerization results in products having a low residual monomer content, an improved water absorption under load, and a higher retention, with a production method being employed which is technically simple and economically efficient at the same time. The thermally activatable initiator portion may either be added to the monomer solution or applied to the substrate in an amount of 0.01 to 0.5 mole percent, relative to the monomer to be polymerized.

Process for producing a water-absorbing sheet material and the use

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Nettetal, Germany

Edgar Herrmann