Patent ID: 8211418

Claim:
A cured composition obtained from an aqueous mixture comprising: (a) at least one of albumin or gelatin; (b) a water-soluble carbodiimide; and (c) at least one water-dispersible multi-arm polyether amine, the total water-dispersible multi-arm polyether amine concentration being in the range of about 0.4% to about 20% by weight; and, (d) optionally, at least one polycarboxylate selected from the group consisting of carboxymethyl cellulose, carboxymethyl dextran, and carboxymethyl starch; wherein the aqueous mixture is allowed to cure; provided that: (i) if the aqueous mixture comprises albumin, but not gelatin, then the concentration of albumin in the aqueous mixture is about 20% to about 36% by weight; (ii) if the aqueous mixture comprises gelatin, but not albumin, then the concentration of gelatin in the aqueous mixture is about 12% to about 32% by weight; (iii) if the aqueous mixture comprises a mixture of albumin and gelatin, then the total concentration of albumin and gelatin combined is about 12% to about 36% by weight; (iv) the concentration of the water-soluble carbodiimide in the aqueous mixture is about 1% to about 10% by weight; (v) if the aqueous mixture comprises the polyether amine, but not the polycarboxylate, then the concentration of the polyether amine in the aqueous mixture is about 0.4% to about 20% by weight; (vi) if the aqueous mixture comprises both the polyether amine and the polycarboxylate, then the concentration of the polyether amine in the aqueous mixture is about 0.4% to about 20% by weight and the concentration of the polycarboxylate is about 0.4% to about 5% by weight.