Long life lubricating oil using detergent mixture

C - Chemistry – Metallurgy – 10 – M

Patent

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Details

C10M 163/00 (2006.01) C10M 129/54 (2006.01) C10M 159/22 (2006.01) C10M 159/24 (2006.01) C10M 129/10 (2006.01) C10M 135/10 (2006.01) C10M 141/08 (2006.01)

Patent

CA 2393820

A lubricating oil of enhanced life as evidenced by a reduction in viscosity increase, nitration, and TBN depletion and equivalent or improved oxidation and TAN increase performance relative to commercial oils comprises a major amount of a base oil of lubricating viscosity and a minor amount of a mixture of one or more metal sulfonate(s) and/or phenate(s) and one or more metal salicylate(s) detergents, all such detergents used in the mixture being of the same or substantially similar Total Base Number (TBN).

L'invention concerne une huile lubrifiante à plus longue durée de vie matérialisée par une viscosité accrue, une nitratation et une diminution de l'indice de basicité et une oxydation équivalente ou améliorée et des performances améliorées de l'indice d'acidité total par rapport à des huiles commerciales comprenant une grande quantité d'huile de base lubrifiante en raison de sa viscosité et une petite quantité d'un mélange d'un ou plusieurs sulfonate(s) et/ou phénolate(s) métallique(s) et d'un ou plusieurs détergent(s) métallique(s) salicylate(s), tous les détergents utilisés dans le mélange présentant le même indice de basicité ou un indice de basicité sensiblement similaire.

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