Patent ID: 7737214

Claim:
A method for preventing biological adhesion comprising the steps of: providing an adhesion preventive material comprising a crosslinking dextrin derivative containing at least one active ester group introduced in a dextrin chain, and at least one hydroxyl group, wherein the active ester group of the crosslinking dextrin derivative is capable of reacting with the hydroxyl group of its own molecular chain or with a hydroxyl group of a second molecular chain, wherein the adhesion preventive material does not contain a crosslinking agent, forming an ester polymerization material crosslinked due to covalent binding of the active ester group of the crosslinking dextrin derivative and the hydroxyl group of its own molecular chain or the hydroxyl group of the second molecular chain, when the adhesion preventive material is under an alkaline condition, wherein the method is effective to prevent biological adhesion in the biological site.