Method of coating food products and a coating composition

A - Human Necessities – 23 – B

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A23B 7/16 (2006.01) A23B 4/10 (2006.01) A23B 9/14 (2006.01) A23L 3/3463 (2006.01) A23L 3/3526 (2006.01) A23L 3/3544 (2006.01) A23L 3/3562 (2006.01)

Patent

CA 2375784

A virgin chitosan polymer is added to an acid and water solution in an amount sufficient to form an edible composi-tion having a solids content greater than five percent (5 %). The composition is applied to food products, such as fruits, vegetables and nuts, to provide an edible protective coating for the food products. Alternatively, chitosan may be hydrolyzed to a lower molecu-lar weight so that a gel will not be formed when the partially hydrolyzed chitosan is admixed with the acid water solution. An edible wax emulsion and/or preservative may be added to the composition before it is applied to the food products. In a preferred form, a chitosan polymer is used having a molecular weight sufficient to form a composition having a solids content of about fifteen percent (15 %) or higher.

Selon la présente invention, on ajoute en quantité suffisante un polymère de chitosane vierge à une solution acide et aqueuse de manière à former une composition comestible présentant une teneur en matières solides supérieure à 5 pour-cent (5%) et une viscosité de liquide. On applique cette composition sur des produits alimentaires, tels que des fruits, des légumes et des noix, de manière à former un revêtement protecteur comestible sur lesdits produits. Il est également possible d'hydrolyser le chitosane de sorte qu'il ait un poids moléculaire inférieur et qu'un gel ne se forme pas lorsque le chitosane partiellement hydrolysé est mélangé à ladite solution acide et aqueuse. Il est possible d'ajouter à cette composition une émulsion cireuse comestible et/ou un conservateur avant son application sur les produits alimentaires. Dans une réalisation préférée, on utilise un polymère de chitosane ayant un poids moléculaire suffisant pour former une composition présentant une teneur en matières solides supérieure ou égale à quinze pour-cent (15%) environ.

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