PREPARATION OF WATER-ABSORBIG RESIN

PURPOSE:To prepare a water-absorbing resin having high absorbing capacity to distilled water and excellent durability, and suitable as a santiary napkin, a paper diaper, a soil conditioner, etc. by neutralizing a specific carboxyl-containing polymer with an alkali metal, and crosslinking with a poly...

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Bibliographische Detailangaben
1. Verfasser:	MIYAZAKI HIROTOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES AGRICULTURE ANIMAL HUSBANDRY BANDAGES, DRESSINGS OR ABSORBENT PADS BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY 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 DYES FILTERS IMPLANTABLE INTO BLOOD VESSELS FIRST-AID KITS FISHING FOMENTATION FORESTRY HUMAN NECESSITIES HUNTING HYGIENE 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 PEST REPELLANTS OR ATTRACTANTS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PLANT GROWTH REGULATORS POLISHES PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF PROSTHESES THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING TRAPPING TREATMENT OR PROTECTION OF EYES OR EARS
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Beschreibung
Zusammenfassung:	PURPOSE:To prepare a water-absorbing resin having high absorbing capacity to distilled water and excellent durability, and suitable as a santiary napkin, a paper diaper, a soil conditioner, etc. by neutralizing a specific carboxyl-containing polymer with an alkali metal, and crosslinking with a polyvalent amine. CONSTITUTION:A maleic anhydride copolymer having an intrinsic viscosity of 0.1-8dl/g and composed of an alpha-olefin (e.g. isobuthylene) or a vinyl compound (e.g. styrene) and maleic anhydride, or a (meth)acrylic acid polymer having an intrinsic viscosity of 0.1-10dl/g[e.g. polymethyl(meth) acrylate]is neutralized with an alkali metal hydroxide (e.g. sodium hydroxide) to a neutralization degree of 0.2-0.9, and 100pts.wt. of the neutralized product thus obtained is dissolved pref. in water, added with 0.05-2pts.wt. of a polyvalent amine (e.g. polyethyleneimine), mixed, stirred, and dried to obtain the objective water-absorbing resin.