Rheology modifier compositions and methods of use

US8969261B2 · kind B2 · utility

Assignee

• RHODIA OPERATIONS · FR

Inventors

• Ruela Talingting Pabalan · Burlington, US
• Nemesio Martinez-Castro · Bristol, US
• Subramanian Kesavan · Plainsboro, US
• Marie-Pierre Labeau · Sèvres, FR
• Bruno Langlois · Sainte-Geneviève-des-Bois, FR

Key dates

• Filing date: Feb 14, 2011
• Grant date: Mar 3, 2015
• Expiry date: Oct 12, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2208/00
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

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.