US4035235A
Expired / Lapsed
US
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Method of making lipophilic starch derivatives
Assignee: Anheuser Busch Companies LLC
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Filing: 1973-03-12
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Granted: 1977-07-12
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Expires: 1993-03-12
Abstract
Abstract This disclosure involves a method of making lipophilic modified starch derivatives that are suitable for encapsulating fats and oils and producing stable emulsions. The starch has a reduced viscosity with both hydrophobic and hydrophilic properties. The process of preparing the starch derivatives includes the steps of esterification of the starch with n-octenyl succinic anhydride, washing, enzyme modification and drying. The enzyme modification is critical to the invention.
Inventors
- 👤 Charles N. Richards
- 👤 Clifford D. Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:15
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/02; B01J13/06; C; C08; C08B; C08B31/00; C08B31/02; C08B31/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
181 words
A method for producing a lipophilic derivative of starch to be used in encapsulating water-insoluble substances which comprises a. reacting in an alkaline aqueous medium granular waxy starch and a substituted cyclic dicarboxylic anhydride having the following formula: ##STR3## wherein R is a radical from the class of dimethylene and trimethylene radicals and R' is the substituent group from the class consisting of an alkyl, alkenyl, aralkyl and aralkenyl to produce a granular starch reaction product which is the acid ester of the substituted dicarboxylic acid having a degree of substitution of about 2-3%, b. recovering the granular starch reaction product, c. washing the granular starch reaction product of step b, d. treating the washed granular starch reaction product with an alpha-amylase enzyme treatment which gelatinizes and depolymerizes the granular starch reaction product to produce a dispersion of the lipophilic derivative of starch in water which derivative has said degree of substitution and has a viscosity of about 125 to about 500 as measured by a Brookfield method at spindle 2 speed 20 RPM at 30% concentration and 25° C. temperature.
Claim 2
Independent Claim
181 words
A method for producing a lipophilic derivative of starch to be used in encapsulating water-insoluble substances which comprises a. reacting in an alkaline aqueous medium granular waxy starch and a substituted cyclic dicarboxylic anhydride having the following formula: ##STR3## wherein R is a radical from the class of dimethylene and trimethylene radicals and R' is the substituent group from the class consisting of an alkyl, alkenyl, aralkyl and aralkenyl to produce a granular starch reaction product which is the acid ester of the substituted dicarboxylic acid having a degree of substitution of about 2-3%, b. recovering the granular starch reaction product, c. washing the granular starch reaction product of step b, d. treating the washed granular starch reaction product with an alpha-amylase enzyme treatment which gelatinizes and depolymerizes the granular starch reaction product to produce a dispersion of the lipophilic derivative of starch in water which derivative has said degree of substitution and has a viscosity of about 125 to about 500 as measured by a Brookfield method at spindle 2 speed 20 RPM at 30% concentration and 25° C. temperature.
Claim 3
Dependent Claim
19 words
The method of claim 1 in which the enzyme is inactivated by the addition of sodium hypochlorite and/or heat.
Claim 4
Dependent Claim
12 words
The method of claim 1 in which the starch derivative is spray-dried.
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein the anhydride is n-octenyl succinic anhydride.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |