a water swelling polymer gel produced by covalently crosslinking a polysaccharide having a carboxyl group within the molecule with a diaminoalkane derivative as the crosslinking reagent . the medical polymer gel is useful as the structural component of wound dressings , adhesives for biological tissues , adhesion preventing agents , bone reinforcing agents , and drug releasing base materials . wound dressings comprising the structural material of the water swelling polymer gel of the present invention , can be applied to a patient with wound , burn , and decubitus to promote the healing of the wounds of the patient .