| abstract |
There are provided a hydrogel having a highly strengthened self-supporting property, which can be prepared by simply mixing at room temperature, and a method for producing the hydrogel. A hydrogel-formable composition capable of forming a hydrogel having a self-supporting property characterized by comprising: a water-soluble organic polymer having an organic acid structure, an organic acid salt structure, or an organic acid anion structure; a silicate; a compound having a diphosphonic acid structure of Formula (I): n n n n n n n n n n wherein R 1 and R 2 each are independently specific substituents, X 1 and X 2 each are independently a single bond or a linking group, and n is an integer of 1 to 5; or a salt thereof; and a compound having or generating a positive charge of divalent or more, a hydrogel which is formed from the composition, and a method for producing the hydrogel. |