US3624070A
Expired / Lapsed
US
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Granular gelatinizable quaternary ammonium starch ethers and process of making same
Assignee: Anheuser Busch Companies LLC
•
Filing: 1966-02-11
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Granted: 1971-11-30
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Expires: 1986-02-11
Abstract
Abstract The invention relates to the preparation of granular, gelatinizable quaternary ammonium starch ethers from starch and an amine alkene halide and to such starch ethers.
Inventors
- 👤 Walter G Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:12
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08; C08B31/12; C08B31/125; D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/24; D21H17/28; D21H17/29
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
16 words
The product of claim 1 wherein the amine alkene halide is a quaternary ammonium butene halide.
Claim 2
Dependent Claim
23 words
The product of claim 2 wherein the amine butene halide is the quaternary ammonium salt of the reaction product of trimethylamine and dichlorobutene-2.
Claim 3
Dependent Claim
17 words
The product of claim 1 wherein the reaction product is a cold water soluble gelatinized starch ether.
Claim 4
Dependent Claim
22 words
A cationic starch consisting essentially of the reaction product of starch suspended in an aqueous medium with a quaternary ammonium butene halide.
Claim 5
Dependent Claim
21 words
A cationic starch consisting essentially of the reaction product of starch suspended in an aqueous medium with 4-halo-2 -butenyl-trimethyl ammonium chloride.
Claim 6
Dependent Claim
34 words
A cationic starch consisting essentially of a reaction product of starch suspended in an aqueous medium with about 2.21 to about 3.54 mol percent, based on the C6H10O5 starch unit, of 4-halo-2-butenyltrimethyl ammonium chloride.
Claim 7
Independent Claim
52 words
A method of making a starch ether comprising the step of reacting starch with from about 0.5 percent to about 10 percent of an amine alkene halide at a temperature below the gelatinization temperature of the starch in the presence of an alkaline catalyst and in the absence of a gelatinization inhibitor.
Claim 8
Dependent Claim
16 words
The method of claim 8 wherein the amine butene halide is a tertiary amine butene halide.
Claim 9
Dependent Claim
23 words
The method of claim 8 wherein the amine butene halide is the quaternary ammonium salt of the reaction product of trimethylamine and dichlorobutene-2.
Claim 10
Dependent Claim
14 words
A method of claim 8 further comprising the step of gelatinizing the reaction product.
Claim 11
Dependent Claim
12 words
The method of claim 8 wherein the alkaline catalyst is hydrated lime.
Claim 12
Dependent Claim
23 words
Process for preparing cationic starch comprising reacting starch suspended in an aqueous medium with 4-halo-2-butenyltrimethyl ammonium halide in the presence of an alkali.
Claim 13
Dependent Claim
16 words
The process as claimed in claim 13 wherein the starch is reacted with 4-chloro-2-butenyltrimethyl ammonium chloride.
Claim 14
Dependent Claim
17 words
The process as claimed in claim 13 wherein the aqueous medium is heated up to 122* F.
Claim 15
Dependent Claim
20 words
The process as claimed in claim 13 wherein a gelatinization inhibitor is added to the aqueous suspension of the starch.
Claim 16
Dependent Claim
30 words
The process as claimed in claim 16 wherein about 74.72 percent of a gelatinization inhibitor is added on the basis of the starch weight, the gelatinization inhibitor being sodium sulfate.
Claim 17
Dependent Claim
59 words
The process for the manufacture of quaternary ammonium starch ethers, wherein an etherifying agent containing a quaternary ammonium group is reacted with a suspension of granule starch under nongelatinizing conditions of alkalinity and temperature, comprising employing as said etherifying agent a compound represented by the structural formula: wherein X is a halide, R is methyl and G is alkenylene.
Claim 18
Dependent Claim
10 words
The process of claim 18 wherein G contains four carbons.
Claim 19
Dependent Claim
92 words
The process for the manufacture of quaternary ammonium starch ethers, comprising reacting a haloalkenylene quaternary with an aqueous alkaline suspension of granule starch, said quaternary being reacted with said starch under nongelatinizing conditions of alkalinity and temperature in the proportions of 0.004 to 0.088 mole per mole of starch, said reaction being continued until said starch contains from 0.0034 to 0.07 quaternary ether group per anhydroglucose unit, said haloalkenylene quaternary being represented by the structural formula: wherein G is alkenylene, R is selected from methyl and ethyl and X is a halide.
Claim 20
Dependent Claim
15 words
The process of claim 20 wherein R is methyl and wherein G contains four carbons.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |