Lubricating oil compositions

C - Chemistry – Metallurgy – 10 – M

Patent

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Details

C10M 169/04 (2006.01) C10M 135/18 (2006.01) C10M 159/18 (2006.01) C10M 163/00 (2006.01)

Patent

CA 2397885

This invention relates to a lubricating oil composition comprising a base stock and an antioxidant comprising an oil soluble trinuclear organomolybdenum compound of the generic formula (I): Mo3S z-(Q) (I) wherein z is from 4 to 10 and Q is a core group, which may be a ligand, and at least one other compound selected from a phenolic and an aminic compound wherein the basestock has a kinematic viscosity at 100°C (KV100) from about 2 cSt to 20 cSt (2 x 10 -6 to 20 x 10 -6 m2/sec) and a saturates content of at least 85%. The composition has a high oxidation stability, reduced deposit formation and is capable of giving rise to good fuel economy improvement.

L'invention concerne une composition d'huile lubrifiante qui comprend une huile de base et un antioxydant renfermant un composé d'organomolybdène trinucléaire soluble dans l'huile de formule générale (I) Mo3Sx-(Q). Dans ladite formule, x vaut de 4 à 10 et Q est un groupe central, qui peut être un ligand. Il existe au moins un autre composé pouvant être un composé phénolique ou aminofonctionnel. L'huile de base a une viscosité cinématique, à 100 DEG C (KV100), comprise entre environ 2 cSt et 20 cSt (2 x 10<-6> à 20 x 10<-6> m<2>/sec) et une teneur en produits saturés d'au moins 85 %. La composition présente une stabilité élevée à l'oxydation, une formation de dépôts réduite, permettant par ailleurs d'améliorer de manière satisfaisante les économies de carburant.

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