US4469620A
Expired / Lapsed
US
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Dry blend thickening composition containing benzoquinone and polygalactomannan gum
Assignee: Celanese Corp
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Filing: 1983-02-11
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Granted: 1984-09-04
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Expires: 2003-02-11
Abstract
Abstract This invention provides a particulate dry blend thickening agent consisting of polygalactomannan gum (e.g., guar gum), benzoquinone, and a basic reagent (e.g., sodium carbonate). This invention further provides a process for preparing a viscoelastic aqueous solution which contains a benzoquinone ether adduct of polygalactomannan gum that is formed in situ. An invention thixotropic aqueous medium is characterized by excellent heat stability and high tolerance to the presence of inorganic salts. A unique property of an invention thixotropic aqueous medium is a time-dependent gradual restoration of high viscosity after cessation of high shear deformation.
Inventors
- 👤 Rachel S. Kohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:11
CPC Classifications
C; C08; C08L; C08L5/00; C08L5/14; B; B01; B01J; B01J13/00; B01J13/0073; B01J13/0082; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/06; C09K8/08
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
40 words
A dry blend composition adapted for application as a thickening agent in aqueous solutions which comprises (1) polygalactomannan gum, (2) between about 0.1-10 weight percent of benzoquinone, based on the weight of polygalactomannan gum, and (3) a water-soluble basic reagent.
Claim 2
Dependent Claim
40 words
A dry blend composition adapted for application as a thickening agent in aqueous solutions which comprises (1) polygalactomannan gum, (2) between about 0.1-10 weight percent of benzoquinone, based on the weight of polygalactomannan gum, and (3) a water-soluble basic reagent.
Claim 3
Dependent Claim
23 words
A dry blend composition in accordance with claim 1 in a particulate form which is adapted for rapid dissolution in an aqueous medium.
Claim 4
Dependent Claim
23 words
A dry blend composition in accordance with claim 1 wherein the polygalactomannan gum is guar gum or an ether derivative of guar gum.
Claim 5
Dependent Claim
25 words
A dry blend composition in accordance with claim 1 wherein the polygalactomannan gum is locust bean gum or an ether derivative of locust bean gum.
Claim 6
Dependent Claim
17 words
A dry blend composition in accordance with claim 1 wherein the basic reagent is an inorganic salt.
Claim 7
Dependent Claim
18 words
A dry blend composition in accordance with claim 1 wherein the basic reagent is an alkali metal salt.
Claim 8
Dependent Claim
18 words
A dry blend composition in accordance with claim 1 wherein the basic reagent is an alkali metal carbonate.
Claim 9
Dependent Claim
16 words
A dry blend composition in accordance with claim 1 wherein the basic reagent is sodium carbonate.
Claim 10
Dependent Claim
16 words
A dry blend composition in accordance with claim 1 wherein the basic reagent is potassium carbonate.
Claim 11
Dependent Claim
43 words
A process for preparing a thixotropic aqueous solution which comprises treating an aqueous medium with a thickening agent comprising (1) polygalactomannan gum, (2) between about 0.1-10 weight percent of benzoquinone, based on the weight of polygalactomannan gum, and (3) a water-soluble basic reagent.
Claim 12
Dependent Claim
43 words
A process for preparing a thixotropic aqueous solution which comprises treating an aqueous medium with a thickening agent comprising (1) polygalactomannan gum, (2) between about 0.1-10 weight percent of benzoquinone, based on the weight of polygalactomannan gum, and (3) a water-soluble basic reagent.
Claim 13
Dependent Claim
19 words
A process in accordance with claim 10 wherein the thickening agent is a dry blend composition in particulate form.
Claim 14
Dependent Claim
20 words
A process in accordance with claim 10 wherein the thickening agent is rapidly dispersed in the aqueous medium with stirring.
Claim 15
Dependent Claim
24 words
A process in accordance with claim 12 wherein dissolution of the thickening agent is achieved in less than about five minutes at ambient temperature.
Claim 16
Dependent Claim
21 words
A process in accordance with claim 10 wherein the polygalactomannan gum is guar gum or an ether derivative of guar gum.
Claim 17
Dependent Claim
22 words
A process in accordance with claim 10 wherein the polygalactomannan gum is locust bean gum or an ether derivative of guar gum.
Claim 18
Dependent Claim
15 words
A process in accordance with claim 10 wherein the basic reagent is an inorganic salt.
Claim 19
Dependent Claim
16 words
A process in accordance with claim 10 wherein the basic reagent is an alkali metal salt.
Claim 20
Dependent Claim
14 words
A process in accordance with claim 10 wherein the basic reagent is sodium carbonate.
Claim 21
Dependent Claim
14 words
A process in accordance with claim 10 wherein the basic reagent is potassium carbonate.
Claim 22
Dependent Claim
26 words
A process in accordance with claim 10 wherein benzoquinone ether adduct of polygalactomannan gum is formed in the aqueous solution at a pH above about 7.
Claim 23
Dependent Claim
130 words
A process for producing a thixotropic aqueous solution containing a benzoquinone ether adduct of polygalactomannan gum which comprises treating an aqueous medium with a powder composition comprising (1) polygalactomannan gum, (2) between about 0.1-10 weight percent of benzoquinone, based on the weight of polygalactomannan gum, and (3) a water-soluble basic reagent; wherein the product thixotropic solution at a 1.0 weight percent content level of the benzoquinone ether adduct of polygalactomannan gum exhibits a viscosity of 10,000-120,000 centipoises at a shear ratio of 0.3 reciprocal seconds, a viscosity of 3000-10,000 centipoises at a shear rate of 5 reciprocal seconds, and a viscosity of 50-300 centipoises at a shear rate of 500 reciprocal seconds, and wherein the solution has the ability to recover the low-shear high-viscosity state over an elapsed time period.
Claim 24
Dependent Claim
130 words
A process for producing a thixotropic aqueous solution containing a benzoquinone ether adduct of polygalactomannan gum which comprises treating an aqueous medium with a powder composition comprising (1) polygalactomannan gum, (2) between about 0.1-10 weight percent of benzoquinone, based on the weight of polygalactomannan gum, and (3) a water-soluble basic reagent; wherein the product thixotropic solution at a 1.0 weight percent content level of the benzoquinone ether adduct of polygalactomannan gum exhibits a viscosity of 10,000-120,000 centipoises at a shear ratio of 0.3 reciprocal seconds, a viscosity of 3000-10,000 centipoises at a shear rate of 5 reciprocal seconds, and a viscosity of 50-300 centipoises at a shear rate of 500 reciprocal seconds, and wherein the solution has the ability to recover the low-shear high-viscosity state over an elapsed time period.
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) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |