US4696677A
Expired / Lapsed
US
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Quaternary ammonium salts of anionic gums
Assignee: Monsanto Co
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Filing: 1986-04-11
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Granted: 1987-09-29
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Expires: 2006-04-11
Abstract
Abstract Partially derivatized anionic gums are disclosed. The gum derivatives are prepared by reacting non-derivatized gum with quaternary ammonium compounds in less than the stoichiometric amount required for complete derivatization. The partially derived gums are water soluble and resistant to bacterial degradation.
Inventors
- 👤 George T. Colegrove
- 👤 Kenneth Clare
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:58
CPC Classifications
C; C08; C08B; C08B37/00; C10; C10L; C10L1/00; C10L1/32; C10L1/324; C08B37/0006; C08B37/0024; C08B37/0033; C08B37/006; C08B37/0084; C10L1/326
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
54 words
A partially derivatized quaternary ammonium salt of an anionic gum comprising 3-20% quaternary ammonium compound by weight anionic gum, wherein said quaternary ammonium compound contains a single alkyl or alkenyl substituent of 13-24 carbon atoms or two alkyl or alkenyl substituents of 12-24 carbon atoms per substituent, and the ethylene oxide substituted analogs thereof.
Claim 2
Dependent Claim
54 words
A partially derivatized quaternary ammonium salt of an anionic gum comprising 3-20% quaternary ammonium compound by weight anionic gum, wherein said quaternary ammonium compound contains a single alkyl or alkenyl substituent of 13-24 carbon atoms or two alkyl or alkenyl substituents of 12-24 carbon atoms per substituent, and the ethylene oxide substituted analogs thereof.
Claim 3
Dependent Claim
41 words
A salt of claim 1 wherein the anionic gum is xanthan gum, alginic acid, sodium alginate, ammonium alginate, propyleneglycol alginate, iota-. kappa-, or lambda-carrageenan, gum ghatti, karaya gum, tragacanth gum, gum arabic, pectin, alkoxycelluloses, carboxymethyl guar or carboxymethyl locust bean gum.
Claim 4
Dependent Claim
10 words
A salt of claim 1 comprising 5-10% quaternary ammonium compound.
Claim 5
Dependent Claim
13 words
A salt of claim 1 comprising xanthan gum and 3-10% quaternary amonium compound.
Claim 6
Dependent Claim
30 words
A process for preparing partially derivatized quaternary ammonium salts of anionic gum which comprises intimately mixing a non-derivatized anionic gum with 3-20% by weight of a quaternary ammonium chloride compound.
Claim 7
Dependent Claim
30 words
A process for preparing partially derivatized quaternary ammonium salts of anionic gum which comprises intimately mixing a non-derivatized anionic gum with 3-20% by weight of a quaternary ammonium chloride compound.
Claim 8
Dependent Claim
15 words
A process of claim 5 wherein the mixing is at 10°-90° C. under high agitation.
Claim 9
Dependent Claim
29 words
An aqueous coal slurry comprising by weight 50-78% coal, 0-20% petroleum fuel, 0.01 to 0.1% partially derivatized quaternary ammonium salt of claim 1, 0-2% dispersant, and water to 100%.
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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) | 1990-09-28 | 1991-03-30 | 1991-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-28 | 1995-03-30 | 1995-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-28 | 1999-03-30 | 1999-09-29 | $7700.00 | Window Closed / Lapsed |