WATER-ABSORBING RESIN AND METHOD FOR MANUFACTURING THE SAME

PROBLEM TO BE SOLVED: To provide a water-absorbing resin with high productivity, which is a water-absorbing resin obtained by using a raw material derived from biomass, and exhibits a high water absorption rate capable of sufficiently responding to required performance in practical use and in partic...

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Hauptverfasser:	KOBAYASHI HIROSHI, ADACHI YOSHIJI, ISHIZAKI KUNIHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G BANDAGES, DRESSINGS OR ABSORBENT PADS CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES CHEMISTRY COMPOSITIONS BASED THEREON DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS DISINFECTION, STERILISATION, OR DEODORISATION OF AIR FILTERS IMPLANTABLE INTO BLOOD VESSELS FIRST-AID KITS FOMENTATION GENERAL PROCESSES OF COMPOUNDING 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 ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES PROSTHESES THEIR PREPARATION OR CHEMICAL WORKING-UP TREATMENT OR PROTECTION OF EYES OR EARS WORKING-UP
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a water-absorbing resin with high productivity, which is a water-absorbing resin obtained by using a raw material derived from biomass, and exhibits a high water absorption rate capable of sufficiently responding to required performance in practical use and in particular, a high water absorption rate under no pressure and a high water absorption rate under pressure.SOLUTION: A method for producing the water-absorbing resin includes: a polymerizing step of an aqueous monomer solution containing, as an essential component, an acid group-containing unsaturated monomer; a drying step of the obtained water-containing gel; and a surface crosslinking step of crosslinking the surface of water-absorbing resin particles after drying. In the polymerization step, polysaccharides are mixed at such a stage that the polymerization rate is higher than 0 mol% and not higher than 90 mol%, and further, polymerization is advanced.