Patent US4452639A successfully refreshed from Google Patents.
US4452639A
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Benzoquinone ether adduct of polygalactomannan gum
Assignee: Celanese Corp
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Filing: 1982-11-15
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Granted: 1984-06-05
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Expires: 2002-11-15
Abstract
Abstract This invention provides a viscoelastic aqueous solution which contains a novel benzoquinone ether adduct of polygalactomannan gum as a thickening agent. 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 05:04
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/07; C08K5/08; C08L; C08L5/00
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
42 words
A process for increasing the viscosity of an aqueous solution of polygalactomannan gum having a pH of at least about 6.0, which comprises adding between about 0.1-10 weight percent, based on the weight of polygalactomannan gum, of benzoquinone to the aqueous solution.
Claim 2
Dependent Claim
42 words
A process for increasing the viscosity of an aqueous solution of polygalactomannan gum having a pH of at least about 6.0, which comprises adding between about 0.1-10 weight percent, based on the weight of polygalactomannan gum, of benzoquinone to the aqueous solution.
Claim 3
Dependent Claim
26 words
A process in accordance with claim 1 wherein the solution content of polygalactomannan gum is less than about 3.0 weight percent, based on the solution weight.
Claim 4
Dependent Claim
14 words
A process in accordance with claim 1 wherein the polygalactomannan gum is guar gum.
Claim 5
Dependent Claim
18 words
A process in accordance with claim 1 wherein the polygalactomannan gum is an ether derivative of guar gum.
Claim 6
Dependent Claim
18 words
A process in accordance with claim 1 wherein the polygalactomannan gum is a hydroxyalkyl ether of guar gum.
Claim 7
Dependent Claim
18 words
A process in accordance with claim 1 wherein the polygalactomannan gum is a carboxyalkyl ether of guar gum.
Claim 8
Dependent Claim
21 words
A process in accordance with claim 1 wherein the pH of the aqueous solution is in the range between about 7-10.
Claim 9
Dependent Claim
20 words
A process in accordance with claim 1 wherein the viscosity of the aqueous solution is increased to about 10,000-120,000 centipoises.
Claim 10
Dependent Claim
35 words
A dry blend composition adapted for application as a thickening agent in aqueous solutions which comprises (1) polygalactomannan gum, and (2) between about 0.1-10 weight percent, based on the weight of polygalactomannan gum, of benzoquinone.
Claim 11
Dependent Claim
35 words
A dry blend composition adapted for application as a thickening agent in aqueous solutions which comprises (1) polygalactomannan gum, and (2) between about 0.1-10 weight percent, based on the weight of polygalactomannan gum, of benzoquinone.
Claim 12
Dependent Claim
11 words
A solid composition comprising particulate benzoquinone ether adduct of polygalactomannan gum.
Claim 13
Dependent Claim
11 words
A solid composition comprising particulate benzoquinone ether adduct of polygalactomannan gum.
Claim 14
Dependent Claim
15 words
A solid composition in accordance with claim 10 wherein the polygalactomannan gum is guar gum.
Claim 15
Dependent Claim
19 words
A solid composition in accordance with claim 10 wherein the polygalactomannan gum is an ether derivative of guar gum.
Claim 16
Dependent Claim
15 words
A solid composition comprising leguminosae endosperm splits containing a benzoquinone ether adduct of polygalactomannan gum.
Claim 17
Dependent Claim
15 words
A solid composition comprising leguminosae endosperm splits containing a benzoquinone ether adduct of polygalactomannan gum.
Claim 18
Dependent Claim
32 words
A process for preparing a solid composition in accordance with claim 13 which comprises treating the endosperm splits with an aqueous solution of benzoquinone at a pH of at least about 7.5.
Claim 19
Dependent Claim
79 words
A thixotropic aqueous solution of a polygalactomannan gum ether derivative, wherein a 1.0 weight percent aqueous solution of the gum exhibits a viscosity of 10,000-120,000 centipoises at a shear rate 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 20
Dependent Claim
79 words
A thixotropic aqueous solution of a polygalactomannan gum ether derivative, wherein a 1.0 weight percent aqueous solution of the gum exhibits a viscosity of 10,000-120,000 centipoises at a shear rate 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 21
Dependent Claim
21 words
A thixotropic aqueous solution in accordance with claim 15 wherein the polygalactomannan gum is a benzoquinone ether adduct of polygalactomannan gum.
Claim 22
Dependent Claim
21 words
A thixotropic aqueous solution in accordance with claim 15 wherein the polygalactomannan gum is a benzoquinone ether adduct of guar gum.
Claim 23
Dependent Claim
24 words
A thixotropic aqueous solution in accordance with claim 15 wherein the polygalactomannan gum is a benzoquinone ether adduct of hydroxyalkyl ether of guar gum.
Claim 24
Dependent Claim
24 words
A thixotropic aqueous solution in accordance with claim 15 wherein the polygalactomannan gum is a benzoquinone ether adduct of carboxylalkyl ether of guar gum.
Claim 25
Dependent Claim
6 words
Benzoquinone ether adduct of polygalactomannan gum.
Claim 26
Dependent Claim
6 words
Benzoquinone ether adduct of polygalactomannan gum.
References Cited (Backward Citations)
US3912713A
Cited
US4183765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-05 | 1987-12-05 | 1988-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-05 | 1991-12-05 | 1992-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-05 | 1995-12-05 | 1996-06-05 | $7700.00 | Window Closed / Lapsed |