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AssigneeBiotec Biologische Naturverpackungen GmbH & Co. KG
InventorsJurgen Loercks, Winfried Pommeranz, Harald Schmidt, Ralf Timmermann, Ernst Grigat, Wolfgang Schulz-Schlitte
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Thermoplastic starch compositions formed by converting native starch or starch derivatives into thermoplastic starch by at least one hydrophobic biodegradable polymer that functions as a plasticizer for starch. The hydrophobic biodegradable polymer may be a polymer selected from the following list: an aliphatic polyester, a copolyester with aliphatic and aromatic blocks, a polyester amide, a polyester urethane, a polyethylene oxide polymer and/or a polyglycol, and/or mixtures of these. When the starch, such as in particular native starch or derivatives thereof, is mixed in the melt with the hydrophobic biodegradable polymer as a plasticizer or swelling agent, to homogenize the mixture, the water content is reduced to less than about 5% by weight based on the weight of the mixture.
A starch-based polymeric material comprising thermoplastic starch formed by converting at least one of native starch or a starch derivative into a thermoplastic starch melt at least in part by means of a hydrophobic biodegradable polymer that functions as a plasticizer for starch and that comprises at least one of an aliphatic polyester, a copolyester having aliphatic and aromatic blocks, a polyester amide, a polyester urethane, a polyethylene oxide polymer, or a polyglycol, wherein the thermoplastic starch is formed by heating and mixing the native starch or starch derivative with the biodegradable polymer in a manner so as to yield a thermoplastic starch melt that comprises less than about 5% water by weight based on the total weight of the polymeric material prior to cooling.
A starch-based polymeric material comprising:
A starch-based polymeric material comprising:
A method for manufacturing a starch-based polymeric material, comprising:
Dependencies are inferred from the claim text.