Disclosed are multifunctional compounds represented by structural formula (I): ##STR00001##
methods of producing compounds represented by structural formula (I) and their use in inhibiting corrosion in corrodible material.

The invention relates to a microemulsion comprising water in an amount of 1-30 w %; sodium or potassium oleate, Na/K salts of tall oil fatty acid, and/or Na/K salts of C16-C18 saturated or unsaturated fatty acids in an amount of 10-40 w %; oleic acid, tall oil fatty acid, or C16-C18 saturated or unsaturated fatty acids in an amount of 2-40 w %; ethanol in an amount of 0-40 w %; glycerol in an amount of 5-40 w %; and liquid hydrocarbon(s) in an amount of 5-40 w %, up to a maximum or total of components parts of 100 w %. Moreover, methods of manufacture and uses of the microemulsion are disclosed.

The present invention concerns a composition suitable for working and shaping metals, in particular providing a lubricating effect, including polymers of the following formula: [R—O(—CH(CH.sub.3)—CH.sub.2O—).sub.n(CH.sub.2—CH.sub.2O—).sub.p—].sub.1+xP(═O)(OH).sub.2-x in which: R is a linear or branched, preferably linear, saturated or unsaturated hydrocarbon group, comprising between 8 and 12 carbon atoms; n is a number, which may or may not be an integer, between 6 and 20; p is a number, which may or may not be an integer, between 4 and 25; and x is a number between 0 and 1, and in particular between 0.1 and 0.9.

The present invention provides a class of halogen-containing synthetic base oils, and preparation method and use thereof. The synthetic base oils have introduced with halogen, especially fluorine, wherein the dipole motion of the halogen groups results in dipole interaction between the dipoles of other components and the base oil molecules of dipole-dipole and dipole-induced halogen (especially fluorine), and the interaction force is stronger and more localized than the dispersion force between the molecules of pure hydrocarbon synthetic oils, and thus the performance of the base oils is directly affected. It solved the problem of oil solubility of pure hydrocarbon synthetic oils, and also improved the properties of oxidation resistance and thermal stability.

Disclosed is an additive for lubricating oil, which comprises a phosphite ester compound (A) having a specific structure and a phosphite ester compound (B) having a specific structure, wherein a mass ratio of the phosphite ester compound (A) to the phosphite ester compound (B) (phosphite ester compound (A):phosphite ester compound (B)) is 99:1 to 80:20. According to the present invention, it is possible to provide an additive for lubricating oil, capable of imparting wear resistance and demulsibility with respect to a base oil for lubricating oil, and to impart durability even in the presence of water.

A polymer surfactant for improving engine oil emulsion properties of a lubricating composition mixed with water and/or fuel contamination, particularly at very cold temperatures, is described herein. In approaches, selected polymeric and functionalized compounds can impart both robust emulsion properties and simultaneously deliver good low temperature fluidity for lubricating compositions that may contain residual amounts of water and/or fuel contamination. Lubricating compositions including such surfactants demonstrate robust properties at temperatures down to about −30° C.

Brine-tolerant lubricants are provided. The brine-tolerant lubricants may comprise an oil component, a surfactant component, and, optionally, an additive component. In one aspect, the oil component comprises a fatty acid alkyl ester. In one aspect, the surfactant component comprises at least one of an alkoxylated fatty acid and an alkoxylated fatty alcohol. Also provided are methods for increasing the lubricity of a drilling fluid by contacting the drilling fluid with the brine-tolerant lubricants.

An automotive axle includes a housing including gears and a bath lubricating the gears, the bath including gear oil and about 0.1 to 5 wt. % secondary alcohol ethoxylate based on total weight of the bath such that during automotive operation at temperatures less than a threshold, reverse micelles form to trap air bubbles in the bath, emulsifying the bath, and at temperatures greater than the threshold, the reverse micelles dissipate.

Disclosed are multifunctional compounds represented by structural formula (I):

##STR00001##

methods of producing compounds represented by structural formula (I) and their use in inhibiting corrosion in corrodible material.

Disclosed is a lubricating composition including a base oil, a surfactant system and a phase-change material, especially water. The lubricating composition according to the invention is used to lubricate engines, especially for a vehicle. It has improved thermal performances compared to lubricating compositions of prior art. It also reduces clogging of the engine parts.