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Rheology modifier compositions and methods of use
US8969261B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8969261-B2 |
| Application number | US-201113026705-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 14, 2011 |
| Priority date | Feb 12, 2010 |
| Publication date | Mar 3, 2015 |
| Grant date | Mar 3, 2015 |
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Abstract
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A composition for enhancing fluid viscosity including a mixture of at least one cationic or cationizable polymer and at least one anionic or anionizable (hydrolysable) polymer. The composition has a zeta potential at 25° C. in the range of 0.5 to 100 mV or −0.5 to −100 mV, typically 1 to 60 mV or −1 to −60 mV, or is a precursor convertible at a temperature of 100 to 250° C. to the composition having a zeta potential at 25° C. of 0.5 to 100 mV or −0.5 to −100 mV, typically 1 to 60 mV or −1 to −60 mV. Typically the compositions exhibit salt tolerance and interaction of both polymers at very high temperatures (>300° F.) such that the system exhibits an increase of viscosity at extreme temperatures. The compositions are useful for hydraulic fracturing, enhanced oil recovery, subterranean acidization, personal care as well as home and industrial cleaners.
First claim
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What is claimed is: 1. A composition for enhancing viscosity of a fluid comprising a mixture of: (A) at least a first polymer having a weight average molecular weight of 35,000 to 10,000,000 selected from at least one member of the group consisting of: (1) cationic polysaccharides with quaternized amino functional groups and cationic charge density of 0.3 to 2 milliequivalents/gram selected from a cationically modified member of the group consisting of glucomannan gums and their…
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- What does patent US8969261B2 cover?
- A composition for enhancing fluid viscosity including a mixture of at least one cationic or cationizable polymer and at least one anionic or anionizable (hydrolysable) polymer. The composition has a zeta potential at 25° C. in the range of 0.5 to 100 mV or −0.5 to −100 mV, typically 1 to 60 mV or −1 to −60 mV, or is a precursor convertible at a temperature of 100 to 250° C. to the composition h…
- Who is the assignee on this patent?
- Talingting Pabalan Ruela, Martinez-Castro Nemesio, Kesavan Subramanian, and 3 more
- What technology area does this patent fall under?
- Primary CPC classification A61K8/042. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Tue Mar 03 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).