Lubricant compositions containing alkoxylated amine and...

C - Chemistry – Metallurgy – 10 – M

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C10M 141/00 (2006.01) C10M 141/08 (2006.01) C10M 141/12 (2006.01) C10M 163/00 (2006.01) C10M 167/00 (2006.01)

Patent

CA 2132523

The present invention provides an improved lubricating oil composition for automotive internal combustion engines and transmission which comprises an oil of lubricating viscosity having admixed therewith a minor amount of friction modifier composition which reduces the coeffficient of friction between moving mechanical parts, thereby providing for enhanced fuel economy. The friction modifier composition comprises a combination of an alkoxylated hydrocarbyl amine or a boronated derivative thereof and dydrocarbyl phenol sulfide. This combination of components provides for synergistic fuel economy effects particularly when used as components in automotive crankcase lubricants also containing conventional additive packages, which effects are not observed in oil which contains one or the other of these components alone.

Cette invention concerne une composition d'huile lubrifiante destinée à la transmission et aux moteurs thermiques d'automobiles qui est constituée d'une huile à viscosité lubrifiante dans laquelle on ajoute et on mélange une faible quantité d'une composition d'agents modifiant le frottement qui permet de réduire le coefficient de frottement entre des éléments mécaniques mobiles et qui permet par conséquent de réduire encore plus la consommation de carburant. La composition d'agents modifiant le frottement est formée d'un mélange constitué d'une amine hydrocarbyle alcoxylée ou d'un dérivé boré de cette dernière et d'un sulfure de phénol hydrocarbyle. Cette association de composants produit plus spécifiquement des effets synergiques d'économie de carburant lorsqu'on les utilise comme composants de lubrifiants de carters de moteurs d'automobiles contenant également des systèmes d'additifs classiques; ces effets ne sont pas observés avec de l'huile contenant un seul de ces composants.

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