Patent US3989683A successfully refreshed from Google Patents.
US3989683A
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Method of treating karaya gum
Assignee: Olin Corp
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Filing: 1973-07-19
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Granted: 1976-11-02
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Expires: 1993-07-19
Abstract
Abstract A method of treating karaya gum to stabilize it so that it is less sensitive to the presence of certain priming compositions and will exhibit, when used with priming compositions, improved extrusion characteristics and rheological stability. The karaya gum is suspended in an anhydrous alcohol and treated with a reagent which is soluble in the alcohol whereby the gum renders a priming composition suitable for extrusion for mechanically charging primers.
Inventors
- 👤 Edward A. Staba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:21
CPC Classifications
C; C08; C08B; C08B37/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
124 words
A method of treating karaya gum to increase the stability of aqueous dispersions of the treated karaya gum in wet primer mixes to improve the extrudability and pot life of the primer mixes, said method comprising the steps of: forming a suspension of karaya gum in a solution comprising an anhydrous alcohol solvate selected from the group consisting of methanol, propanol-2, normal propanol, ethanol, and butyl alcohol, and a reagent solute selected from the group consisting of tannic acid, benzoic acid, sorbic acid, gluconic acid, gluconic acid D-lactone, formaldehyde, and acetic anhydride; maintaining said suspension at a reaction temperature equal at least to room temperature for a time period sufficient to enable said solute to form a condensation reaction product with said karaya gum;
Claim 2
Independent Claim
124 words
A method of treating karaya gum to increase the stability of aqueous dispersions of the treated karaya gum in wet primer mixes to improve the extrudability and pot life of the primer mixes, said method comprising the steps of: forming a suspension of karaya gum in a solution comprising an anhydrous alcohol solvate selected from the group consisting of methanol, propanol-2, normal propanol, ethanol, and butyl alcohol, and a reagent solute selected from the group consisting of tannic acid, benzoic acid, sorbic acid, gluconic acid, gluconic acid D-lactone, formaldehyde, and acetic anhydride; maintaining said suspension at a reaction temperature equal at least to room temperature for a time period sufficient to enable said solute to form a condensation reaction product with said karaya gum;
Claim 3
Dependent Claim
12 words
The method of claim 1, further comprising the step of agitating said
Claim 4
Dependent Claim
12 words
The method of claim 1, wherein said reaction temperature is the boiling
Claim 5
Dependent Claim
11 words
The condensation reaction product formed by the method of claim 1.
References Cited (Backward Citations)
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US3507852A
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US3714144A
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US3849341A
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US3716526A
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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) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |