Lubricating oil composition

Details Lubricating oil composition Lubricating oil composition

C - Chemistry, Metallurgy

10

M

253/106, 253/97

C10M 141/06 (2006.01) C10M 141/08 (2006.01)

Patent

CA 1335891

Phosphite-free lubricating oil composition which comprises a) a mineral oil or a synthetic oil or a mixture thereof, and b) a mixture containing at least one aromatic amine of the formula (I), Image (I), in which R1, R2, R3 and R3' are as defined in claim 1, and at least one phenol of the formula Image (II), in which R4, R5 and A are as defined in claim 1, and the compounds are present in the mixture in a ratio of 2 to 6 parts by weight of the aromatic amine(s) of the formula I to 1 part by weight of the phenol(s) of the formula II. The lubricating oil compositions are highly resistant to ageing and areeffective in preventing black sludge formation.

601981

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