Lubricant and functional fluid compositions exhibiting...

Details Lubricant and functional fluid compositions exhibiting... Lubricant and functional fluid compositions exhibiting...

C - Chemistry, Metallurgy

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C10M 141/06 (2006.01) C10M 133/46 (2006.01) C10M 141/12 (2006.01) C10M 161/00 (2006.01) C10M 163/00 (2006.01)

Patent

CA 1337412

A lubricating composition is described which comprises a mixture of (A) a major amount of an oil of lubricating viscosity, (B) a dispersant effective amount of at least one ashless dispersant, and (C) a minor, effective amount of at least one demulsifier character- ized by the formula Image wherein R is a hydrocarbyl group, R2, R3, R4 and R5 are each independently H or hydrocarbyl groups, and X is O or NR' wherein R' is hydrogen or a hydrocarbyl group. In one embodiment, the ashless dispersant is a carboxylic dispersant, and the demulsifier is a deriva- tive of imidazoline. The lubricating compositions of the invention are characterized as having improved dis- persancy, demulsibility, rust-inhibition and anti-wear properties.

614565

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