Glycerol-containing functional fluid

摘要

A functional fluid comprising a major amount of an oil of lubricating viscosity, and at least about 0.05 wt-% glycerol. A method of preparing a functional fluid comprising adding glycerol to a functional fluid, wherein the glycerol is not glycerol monooleate. A method of preparing an additive concentrate comprising adding glycerol to a diluent oil wherein the concentrate contains from about 1% to about 99% by weight of said diluent. A method of reducing wear comprising contacting a metal surface with a functional fluid comprising a major amount of an oil of lubricating viscosity and at least about 0.05 wt-% glycerol.

主权项

1. A tractor hydraulic fluid comprising
a. a major amount of an oil of lubricating viscosity b. at least about 0.05 wt % glycerol; c. 1.23 to 5.0 wt % of at least one low overbased sulfonate detergent; d. 0.1 to 5.0 wt % of at least one high overbased sulfonate detergent; e. 2.0 to 3.0 wt % of at least one medium overbased phenate detergent; f. 0.5 to 3.0 wt % of at least one high overbased phenate detergent; g. 1.28 to 2.0 wt % of at least one medium overbased carboxylate detergent and h. at least one antiwear additive.