Lubricating oil additive and lubricating oil composition...

C - Chemistry – Metallurgy – 10 – M

Patent

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C10M 129/10 (2006.01) C10M 103/06 (2006.01)

Patent

CA 2730031

An overbased salt of an oligomerized alkylhydroxyaromatic compound is disclosed, wherein the alkyl group of the alkylhydroxyaromatic compound is derived from an olefin mixture comprising propylene oligomers having an initial boiling point of at least about 195°C and a final boiling point of no more than about 325°C as measured by ASTM D86. Also disclosed is a lu-bricating oil composition containing at least (a) a major amount of an oil of lubricating viscosity and (b) the overbased salt of the oligomerized alkylhydroxyaromatic compound.

L'invention porte sur un sel surbasé d'un composé alkylhydroxyaromatique oligomérisé, le groupe alkyle du composé alkylhydroxyaromatique étant issu d'un mélange d'oléfines comprenant des oligomères de propylène ayant un point d'ébullition initial d'au moins environ 195°C et un point d'ébullition final de pas plus d'environ 325°C tel que mesuré par ASTM D86. L'invention porte également sur une composition d'huile lubrifiante contenant au moins (a) une quantité majeure d'une huile de viscosité lubrifiante et (b) le sel surbasé du composé alkylhydroxyaromatique oligomérisé.

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