Lubricating composition containing non-acidic phosphorus...

Details Lubricating composition containing non-acidic phosphorus... Lubricating composition containing non-acidic phosphorus...

C - Chemistry, Metallurgy

10

M

C10M 141/12 (2006.01)

Patent

CA 2607108

A lubricating composition with improved storage stability comprising a major amount of an oil of lubricating viscosity, at least one alkali metal borate, at least one polysulfide mixture having at least 40% dihydrocarbyl tetrasulfide or higher sulfides, and at least one non-acidic phosphorus compound comprised of a trihydrocarbyl phosphate and a dihydrocarbyl dithiophosphate derivative is disclosed. In addition to improved storage stability, the composition has improved wear performance when the ratio of polysulfides is controlled.

L'invention concerne une composition lubrifiante ayant une stabilité de stockage améliorée. Cette composition contient une quantité principale d'une huile à viscosité de lubrification, au moins un borate métallique alcalin, au moins un mélange de polysulfure ayant au moins 40 % de dihydrocarbyle tétrasulfure ou des sulfures supérieurs, et au moins un composé phosphoré non acide constitué d'un trihydrocarbyle phosphate et d'un dérivé de dihydrocarbyle dithiophosphate. En plus de la stabilité de stockage améliorée, cette composition a un comportement à l'usure amélioré lorsque le taux de polysulfides est contrôlé.

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