Patent ID: 8410200

Claim:
A barrier material that prevents or minimizes the transmission of gases through said material comprising a biodegradable polymer composition including on a dry basis: a) from 45 to 90% by weight of starch; b) from 0.1 to 15% by weight of a water soluble polymer selected from polyvinyl alcohol, polyvinylacetate, and copolymers of ethylene and vinyl alcohol which have a melting point compatible with the molten state of the starch component; and c) from 5 to 45% by weight of two more plasticizers selected from maltitol, xylitol, and erythritol, and optionally sorbitol, glycerol, mannitol, glycerol trioleate, tributyl citrate, acetyl tri-ethyl citrate, glycerol triacetate, 2,2,4-trimethyl-1,3-pentanediol diisobutyrate, ethylene glycol, or diethylene glycol.