Guar gum-polyacrylamide compositions
Abstract
Abstract A MIXTURE OF A RELATIVELY UNDEGRADED GUAR GUM HAVING A VISCOSITY AT A CONCENTRATION OF 1% BY WEIGHT IN WATER OF ABOUT 500 CENTIPOISES OR MORE WITH A POLYACRYLAMIDE HAVING A DEGREE OF POLYMERIZATION BETWEEN ABOUT 12,000 AND ABOUT 250,000 WITH THE WEIGHT RATIO OF GUAR GUM TO POLYACRYLAMIDE RANGING FROM ABOUT 0.5:1 TO ABOUT 50:1 OR HIGHER. A PROCESS FOR FORMING A THICKENING COMPOSITION BY ADMIXING A RELATIVELY UNDEGRADED GUAR GUM HAVING A 1% BY WEIGHT AQUEOUS VISCOSITY OF ABOUT 500 CENTIPOISES OR HIGHER WITH A POLYACRYLAMIDE HAVING A DEGREE OF POLYMERIZATION BETWEEN ABOUT 12,000 AND ABOUT 250,000 AT A WEIGHT RATIO OR GUAR GUM TO POLYACRYLAMIDE RANGING FROM ABOUT 0.5:1 TO ABOUT 50:1 OR HIGHER. A THICKENED AQUEOUS MEDIUM CONTAINING A MIXTURE OF A RELATIVELY UNDEGRADED GUAR GUM HAVING A 1% AQUEOUS VISCOSITY OF ABOUT 500 CENTIPOISES OR HIGHER WITH A POLYACRYLAMIDE HAVING A DEGREE OF POLYMERIZATION BETWEEN ABOUT 12,000 AND 250,000 AT A WEIGHT RATIO OF GUAR GUM TO POLYACRYLAMIDE RANGING FROM ABOUT 0.5:1 TO ABOUT 50:1 OR HIGHER WITH THE MIXTURE BEING PRESENT IN AN AMOUNT WHICH IS EFFECTIVE TO SYNERGISTICALLY INCREASE THE VISCOSITY OF THE AQUEOUS MEDIUM.
Inventors
- 👤 David J Pettitt
Bibliographic Details
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |