Use of surfactants with low molecular weight as agents for...

Details Use of surfactants with low molecular weight as agents for... Use of surfactants with low molecular weight as agents for...

C - Chemistry, Metallurgy

10

M

C10M 133/08 (2006.01) C10M 129/16 (2006.01) C10M 133/16 (2006.01) C10M 137/04 (2006.01) C10M 145/36 (2006.01)

Patent

CA 2257877

The invention concerns a lubricating fluid comprising: 1) a predominant amount of an oil with appropriate lubricating viscosity; and 2) an effective amount of an agent improving the filterability or one of their mixtures, corresponding to the following formula: R-Z, in which Z represents a polar group selected from the group consisting of a) phosphoric esters; b) amides; c) ethers; d) amino-alcohol's; e) ethoxylated amines or f) their mixtures, and R represents a lipophilic chain with 14 to 24 carbon atoms. The invention also concerns the use of the filterability-enhancing agent described above for improving the filterability of hydraulic oils, and a method for preparing hydraulic fluids with improved filterability.

L'invention concerne un fluide lubrifiant comprenant: 1) une quantité dominante d'une huile de viscosité propre à la lubrification; et 2) une quantité efficace d'un agent améliorant la filtrabilité ou d'un de leurs mélanges, répondant à la formule suivante: R-Z dans laquelle Z représente un groupe polaire choisi dans le groupe consistant en a) esters phosphoriques; b) amides; c) éthers; d) amino-alcools; e) amines éthoxylées ou f) leurs mélanges, et R représente une chaîne lipophile ayant 14 à 24 atomes de carbone. La présente invention concerne également l'utilisation de l'agent améliorant la filtrabilité décrit ci-dessus pour améliorer la filtrabilité d'huiles hydrauliques, ainsi qu'un procédé pour la préparation de fluides hydrauliques à filtrabilité améliorée.

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