Permeable superabsorbent and process for production thereof

A highly permeable superabsorbent is prepared by a process comprisingpolymerizing an aqueous monomer solution comprisinga) at least one ethylenically unsaturated monomer which bears acid groups and is optionally at least partly in salt form,b) at least one crosslinker,c) at least one initiator,d) op...

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Bibliographische Detailangaben
Hauptverfasser:	Daniel, Thomas, Bauduin, Christophe
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON DISINFECTION, STERILISATION, OR DEODORISATION OF AIR HUMAN NECESSITIES HYGIENE MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES MEDICAL OR VETERINARY SCIENCE METALLURGY METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	A highly permeable superabsorbent is prepared by a process comprisingpolymerizing an aqueous monomer solution comprisinga) at least one ethylenically unsaturated monomer which bears acid groups and is optionally at least partly in salt form,b) at least one crosslinker,c) at least one initiator,d) optionally one or more ethylenically unsaturated monomers copolymerizable with the monomers mentioned under a), ande) optionally one or more water-soluble polymers;drying the resulting polymer,optionally grinding the dried polymer and sieving the ground polymer,optionally surface postcrosslinking the dried and optionally ground and sieved polymer,wherein, after drying, grinding or sieving, and, if surface postcrosslinking is conducted, during or after this surface postcrosslinking, x-ray-amorphous aluminum hydroxide powder is added.