MODIFIED SUPERABSORBER BASED ON POLYACRYLONITRILE EMULSION

PROBLEM TO BE SOLVED: To obtain superabsorbing polymers capable of avoiding the gel blocking, achieving an improvement in the initial transport rate and improved in absorptivity under a load and transport rate under the load by crosslinking the surface of a superabsorbing polymer particle and simult...

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Bibliographische Detailangaben
Hauptverfasser:	SACKMANN GUENTER, SCHAPOWALOV SERGEJ DR, KORTE SIEGFRIED, MEYER ROLF-VOLKER DR
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES BANDAGES, DRESSINGS OR ABSORBENT PADS BASIC ELECTRIC ELEMENTS CABLES CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON CONDUCTORS DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS DISINFECTION, STERILISATION, OR DEODORISATION OF AIR DYES ELECTRICITY FILTERS IMPLANTABLE INTO BLOOD VESSELS FIRST-AID KITS FOMENTATION HUMAN NECESSITIES HYGIENE INSULATORS MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE MEDICAL OR VETERINARY SCIENCE METALLURGY METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES PAINTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL POLISHES PROSTHESES SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OR PROTECTION OF EYES OR EARS USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To obtain superabsorbing polymers capable of avoiding the gel blocking, achieving an improvement in the initial transport rate and improved in absorptivity under a load and transport rate under the load by crosslinking the surface of a superabsorbing polymer particle and simultaneously fixing silica in the crosslinked surface structure. SOLUTION: This material is superabsorbing polymers comprising a(n) (un) crosslinked fine polyacrylonitrile emulsion and is obtained by modifying the surface of a polymeric particle by crosslinking and simultaneously fixing silica in the crosslinked surface structure. The surface treatment is preferably carried out by using formaldehyde as a crosslinking agent at 0.03-0.6 wt.% concentration, silica at 0.05-0.8 wt.% concentration and water at 0.5-8 wt.% concentration respectively based on water absorbing polymers. The silica preferably has 10-50 nm particle size and the water is preferably used as a mixture with ethanol or methanol. The modified polymeric particle is preferably dried at 80-100 deg.C.