Surfactants for structuring non-aqueous liquid compositions

B - Operations – Transporting – 01 – F

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B01F 17/00 (2006.01)

Patent

CA 2320188

A surfactant system capable of structuring a non-aqueous liquid composition, wherein the surfactant system comprises at least about 5 % of a structuring particle. The surfactant system preferably further comprises a surfactant selected from the group consisting of anionic, nonionic, cationic, amphoteric surfactants and mixtures thereof. A well dispersed mixture of a non-aqueous liquid, for example, a nonionic surfactant, and at least about 25 % by weight of the surfactant system results in the mixture having a yield of at least about 2.0 Pa when measured at 20sec-1 and 25 ~C. Moreover, the surfactant system should exhibit a peak when measured by SAXS x-ray diffraction, wherein the peak's center is between about the 1.5 to 2.5v positions on the 2 theta axis. The structuring particles are most preferably structuring particles of sulfate and linear alkyl benzene sulfonate. Also provided is a method of making the structuring particle.

L'invention a trait à un système de tensioactifs capable de structurer une composition liquide non aqueuse, dans laquelle le système de tensioactifs comprend au moins environ 5 % d'une particule structurante. Le système de tensioactifs comprend également de préférence un tensioactif choisi dans le groupe comprenant des tensioactifs anioniques, non ioniques, cationiques, amphotères et leurs mélanges. Un mélange bien dispersé d'un liquide non aqueux, par exemple un tensioactif non ionique, et d'au moins 25 % en poids du système de tensioactifs permet d'obtenir un mélange ayant un fluage d'au moins environ 2,0 Pa mesuré à 20 sec?-1¿ et 25 ·C. De plus, le système de tensioactifs doit présenter une crête donnée mesurée par diffraction des rayons X SAXS, dans laquelle le centre de la crête se situe entre environ les positions 1,5 à 2,5 v sur l'axe 2 théta. Les particules structurantes sont idéalement des particules structurantes de sulfate et de sulfonate à alkyle de benzène linéaire. L'invention a également trait à un procédé de production de la particule structurante.

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