C - Chemistry – Metallurgy – 08 – B
Patent
C - Chemistry, Metallurgy
08
B
C08B 31/04 (2006.01) C08L 3/06 (2006.01)
Patent
CA 2351079
The present invention relates to a starch ester having short- and long-chain acyl groups wherein hydrogens in reactive hydroxyl groups in the same starch molecule have been replaced by C2-4 short-chain acyl groups and C6-18 long-chain acyl groups. The degree of substitution by the short- and long-chain acyl groups are regulated so as to make the starch ester thermo-plasticized and moldable even in the absence of a plasticizer. Accordingly, the starch ester of the present invention can be used as a biodegradable thermoplastic plastic material which can be thermo-plasticized in the absence of a plasticizer.
L'invention concerne un ester d'amidon formé par remplacement des atomes d'hydrogène des groupes hydroxyle réactifs présents dans chaque molécule d'amidon par des groupes C2-4 acyle et des groupes C6-18 acyle. On ajuste le degré de remplacement à l'aide de groupes acyle à longue chaîne et de groupes acyle à chaîne courte, l'ester d'amidon pouvant être thermoplastique et moulable même s'il ne contient pas de plastifiant. Cet ester d'amidon est donc utilisable dans un matériau thermoplastique biodégradable même s'il ne contient pas de plastifiant.
Japan Corn Starch Co. Ltd.
Marks & Clerk
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