The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 25, 2007
Filed:
Nov. 12, 2002
Jean-francois Argillier, Saint Cloud, FR;
Isabelle Henaut, {grave over (R)}ueil Malmaison, FR;
Jean-Francois Argillier, Saint Cloud, FR;
Isabelle Henaut, {grave over (R)}ueil Malmaison, FR;
Institut Francais du Petrole, Rueil Malmaison Cedex, FR;
Abstract
The present invention relates to a stable emulsion of an immiscible fluid and of an aqueous phase having a determined pH value. The emulsion is optimized in that it comprises an ionic surfactant and a polyampholytic polymer whose charge depends on the pH value. The respective amounts of surfactant and of polymers are determined according to the charges. Stabilization or destabilization of the emulsion is adjusted by controlling the pH value. The invention also relates to a method of stabilizing and destabilizing an emulsion comprising a surfactant combined with an ampholytic polymer.