HYDROGEL

It is an object of the present invention to provide a hydrogel, in which its initial high adhesive force is retained by suppressing the swelling of the gel due to invasion of water from the outside and reducing the loss of a plasticizer.The hydrogel of the present invention is a hydrogel comprising...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	FUJITA, Takahiko, SATO, Eisaku
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE ADHESIVES CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS DYES MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL ORGANIC MACROMOLECULAR COMPOUNDS PAINTS POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF MATERIALS AS ADHESIVES
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Beschreibung
Zusammenfassung:	It is an object of the present invention to provide a hydrogel, in which its initial high adhesive force is retained by suppressing the swelling of the gel due to invasion of water from the outside and reducing the loss of a plasticizer.The hydrogel of the present invention is a hydrogel comprising a polymer matrix, water and a plasticizer, wherein the hydrogel is characterized in that the plasticizer loss ratio is less than 2, the swelling rate is 115% or less when the hydrogel is exposed to the environment of 40°C and 90% RH for 1 hour, and the initial adhesive force to a Bakelite plate is 100 gf/20 mm or more in the environment of 23°C and 55% RH. The plasticizer is preferably polyoxyalkylene alkyl ether and/or sugar.