Lubricant additives

Details Lubricant additives Lubricant additives

C - Chemistry, Metallurgy

10

M

253/54

C10M 135/34 (2006.01) C10M 135/04 (2006.01)

Patent

CA 1047476

ABSTRACT OF THE DISCLOSURE A process for preparing an oil-soluble metal-free phosphorus-free substance for use as a lubricating additive, which comprises sulphurising a compound having the general formula: Image (B) wherein R, R1, R2, A3, R4 and R5 represent certain specified substituent groups. The sulphurisation is carried out at a temperature of up to 180°C in the absence of a solvent or in the presence of a non-polar solvent. Lubricating compositions may contain a major amount of lubricating oil and a minor amount of the acid sulphurized compound. Preferably, the said sulphurised compound is incorporated into the lubricating composition in an amount of from 0.1 to 10% by weight.

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