Modified thermoplastic starch from ophiostoma ulmi...

C - Chemistry – Metallurgy – 08 – B

Patent

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C08B 31/00 (2006.01) C08J 5/00 (2006.01) C08L 3/04 (2006.01) C08L 101/16 (2006.01) C12N 1/14 (2006.01) C12P 19/04 (2006.01)

Patent

CA 2728384

A novel modified thermoplastic starch is manufactured from a native starch using a polysaccharide produced by the fungus species Ophiostoma ulmi, by growing a culture in a yeast extract medium; adding the native starch; mixing, and harvesting the modified thermoplastic starch. The modified thermoplastic starch may be used in the manufacture of a biodegradable plastic which exhibits low water absorbency and high tensile strength. The plastic may be used to manufacture films or moulding products by casting, extrusion, injection, or compression techniques.

L'invention concerne un nouvel amidon thermoplastique modifié fabriqué à partir d'un amidon natif utilisant un polysaccharide produit par l'espèce de champignon Ophiostoma ulmi, en faisant pousser une culture dans un milieu d'extrait de levure; en ajoutant l'amidon natif; en mélangeant, et en récoltant l'amidon thermoplastique modifié. L'amidon thermoplastique modifié peut être utilisé dans la fabrication d'un plastique biodégradable qui présente une faible hydrophilie et une résistance à la traction élevée. Le plastique peut être utilisé pour fabriquer des films ou des produits moulés par des techniques de coulée, d'extrusion, d'injection, ou de compression.

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