Patent ID: 8241655

Claim:
An article comprising a biodegradable coating, the coating comprising amylose or maltodextrin, which is a linear polymer having repeating glucopyranose units joined by α-1,4 linkages and comprising hydroxyl groups present on 2, 3, and 6 position carbons, with the glucopyranose units comprising one or more pendent coupling groups, and an ester group present between the pendent coupling group and the glucopyranose unit, wherein the ester group is formed from esterification of a hydroxyl group selected from the hydroxyl groups present on the 2, 3, and 6 position carbons of the glucopyranose unit, which comprises the formula: where X represents the 6 position carbon, and Y represents the 2 or 3 position carbon of the glucopyranose unit, wherein the coating is formed on a surface of the article by reaction of the coupling groups to form a crosslinked matrix of a plurality of amylose or maltodextrin, and wherein the amylose or maltodextrin has a molecular weight of 500,000 Da or less.