Hydrophobic starch derivatives
AssigneeCoöperatie AVEBE U.A.
InventorsPieter Lykle Buwalda, Ronald Peter W. Kesselmans, Augustinus Arnoldus M. Maas, Hylke Hotze Simonides
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Abstract
The invention relates to a process for preparing a hydrophobic starch, comprising etherification, esterification or amidation of a root or tuber starch comprising at least 95 wt. % of amylopectin, based on dry substance of the starch, or a derivative thereof, with a substituent comprising an alkyl chain having from 4–24 carbon atoms. The invention further relates to a hydrophobic starch obtainable by said process.
Claims10
A process for preparing a reversible gel comprising
- attaching a hydrophobic substituent to a starch by a reaction selected from the group consisting of etherification, esterification and amidation,
- wherein the starch is a root or tuber starch, or derivative thereof, comprising at least 95 wt. % of amylopectin based on dry substance of the starch;
- wherein said starch is from a plant having elimination or inhibition of genes that encode granule based starch synthase;
- and
- wherein the reaction utilizes a hydrophobic reagent comprising a reactive group and an alkyl group having 7–24 carbon atoms, and
- wherein the reactive group is a halide, halohydrin, epoxide, glycidyl or quaternary ammonium.
A method for increasing the associative behavior of a starch solution said method comprises adding a hydrophobized amylopectin starch to said starch solution, wherein the amylopectin starch is a root or tuber starch, or a derivative thereof, comprising at least 95 wt %. of amylopectin based on dry substance of the starch.
Dependencies are inferred from the claim text.