Marine diesel cylinder lubricants comprising complex detergents

Details Marine diesel cylinder lubricants comprising complex detergents Marine diesel cylinder lubricants comprising complex detergents

C - Chemistry, Metallurgy

10

M

C10M 141/00 (2006.01) C10M 125/24 (2006.01) C10M 163/00 (2006.01)

Patent

CA 2484391

A marine diesel cylinder lubricant composition having a total base number of at least 30. The composition includes at least 40 wt% of an oil of lubricating viscosity, at least one detergent prepared from at least two surfactants, preferably phenate and sulphonate surfactants, at least one boron-containing dispersant providing at least 100 ppm of boron, and at least one zinc- containing antiwear additive, preferably a zinc dihydrocarbyl dithiophosphate, providing at least 230 ppm, preferably at least 250 ppm, of zinc. The marine diesel cylinder lubricant composition exhibits reduced wear even when used with high sulphur fuels.

Formulation destinée à lubrifier les cylindres de moteur diesel marin ayant un indice de base d'au moins 30. La formulation est constituée à au moins 40 % en poids d'une huile possédant une viscosité de lubrification, au moins un détergent préparé à partir d'au moins deux agents de surface, de préférence des agents de surface au phénate et au sulfonate, au moins un agent dispersant boré fournissant au moins 100 ppm de bore, et au moins un additif anti-usure à base de zinc, de préférence, un dihydrocarbyldithiophosphate de zinc fournissant au moins 230 ppm, et de préférence 250 ppm, de zinc. La formulation destinée à lubrifier les cylindres de moteur diesel marin réduit l'usure, même lorsqu'elle est utilisée avec des carburants à forte teneur en soufre.

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