Chemically derivatized maltodextrins

C - Chemistry – Metallurgy – 08 – B

Patent

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C08B 31/00 (2006.01) C08B 30/18 (2006.01) C08B 31/02 (2006.01) C08B 31/04 (2006.01) C08B 31/08 (2006.01) C08B 31/12 (2006.01) C09J 103/02 (2006.01) C09J 103/06 (2006.01) C12P 19/14 (2006.01)

Patent

CA 2253651

High solids maltodextrin syrups, some of which are useful as the base for remoistenable adhesives, are prepared by a high solids alpha amylase enzyme conversion process. They are characterized by their high solids content (at least 55 wt.%) and light color. A granular chemically derivatized, optionally converted, starch having a degree of substitution of greater than about 0.01 and less than about 0.5 is used as the starting material. The maltodextrins have a reducing sugar content of about 5-19 dextrose equivalent and a distinct polymodal molecular weight distribution. When a granular highly esterified starch (D.S. of 0.5-1.8) is used as the starting material in the high solids process, the resulting enzyme-converted, esterified maltodextrins are characterized by their improved water dispersibility.

A l'aide d'un procédé de conversion d'amylase alpha riche en solides on prépare des sirops de maltodextrine riches en solides dont certains sont utiles comme base pour des adhésifs ramollissables. Les sirops se caractérisent par leur teneur élevée en solides (au moins 55 % en poids) et leur couleur claire. On utilise comme matière de départ un amidon granulaire chimiquement dérivé et facultativement converti d'un degré de substitution supérieur à environ 0,01 et inférieur à environ 0,5. Les maltodextrines ont une teneur en sucre réducteur d'environ 5 à 19 équivalent dextrose et une distribution distincte de la masse molaire polymodale. Lorsqu'on utilise un amidon granulaire fortement estérifié ID.S de 0,5 à 1.8) comme matière de départ dans le procédé à forte teneur en solides, les maltodextrines estérifiées converties par enzyme résultantes se caractérisent par leur meilleure dispersibilité dans l'eau.

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