Glucoamylase converted starch derivatives and their use as emulsifying and encapsulating agents
AssigneeNational Starch and Chemical Investment Holding Corporation
InventorsEmily Keller Blue, Chung-Wai Chiu, Zahera Hussain, Himanshu Shah, Paul Trubiano
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Abstract
The present invention relates to modified starches which are prepared by enzymatic hydrolysis of a starch molecule using glucoamylase after the preparation of a starch derivative containing a hydrophobic group or both a hydrophobic and a hydrophilic group, particularly octenyl succinic anhydride starch hydrolyzed by glucoamylase. Such modified starches are useful as emulsifying and/or encapsulating agents, particularly in systems where high load and retention of the active ingredient, low surface oil exposure, and excellent oxidation resistance is desired.
Claims27
A modified starch comprising a starch derivative containing a hydrophobic group or both a hydrophobic and a hydrophilic group, said starch being degraded by glucoamylase capable of hydrolyzing both 1,4- and 1,6-alpha-D-glucosidic linkages of the starch.
A modified starch which has improved oxidation resistance comprising a starch derivative containing a hydrophobic group or both a hydrophobic and a hydrophilic group, said starch being degraded by glucoamylase capable of hydrolyzing both 1,4- and 1,6-alpha-D-glucosidic bonds of the starch, wherein the starch has encapsulation properties characterized by at least 40% load capacity and low surface oil less than about 3%.
A method for preparing a modified starch comprising:
- a. derivitizing a starch such that it contains a hydrophobic group or a hydrophobic and a hydrophilic group;
- and
- b. degrading the starch using glucoamylase capable of hydrolyzing both 1,4- and 1,6-alpha-D-glucosidic linkages of the starch.
A method for preparing a modified starch which has improved oxidation resistance comprising:
- a. derivitizing a starch such that it contains a hydrophobic group or a hydrophobic and a hydrophilic group;
- and
- b. degrading the starch using glucoamylase capable of hydrolyzing both 1,4- and 1,6-alpha-D-glucosidic bonds of the starch, wherein the modified starch has encapsulating properties characterized by at least 40% load capacity an low surface oil less than about 3%.
An encapsulating agent comprising a modified starch comprising a starch derivative containing a hydrophobic group or both a hydrophobic and a hydrophilic group, said starch being degraded by glucoamylase capable of hydrolyzing both 1,4- and 1,6-alpha-D-glucosidic bonds of the starch.
Dependencies are inferred from the claim text.