Water-based hydraulic fluids having improved lubricity and corrosion inhibiting properties

Claim 2

A hydrraulic fluid composition characterized by improved anti-wear and corrosion inhibition properties comprising water, neodecanoic acid and conventional hydraulic fluid addiitives.

Claim 3

The hydraulic fluid of claim 1 wherein said fluid is a concentrate in which the amount of neodecanoic acid is at least about 3.0 percent by weight of the concentrate.

Claim 4

The concentrate of claim 2 wherein said concentrate includes at least one additive selected from the group consisting of phosphate esters or salts thereof selected from the group consisting of and mixtures thereof wherein ethylene oxide groups are represented by EO; B is selected from the group consisting of linear or branched chain alkyl groups wherein said alkyl groups have about 6 to 30 carbon atoms, preferably about 8 to 20 carbon atoms, or alkylaryl groups wherein the alkyl groups have about 6 to 30 carbon atoms, preferably about 8 to 18 carbon atoms, and X is selected from the group consisting of hydrogen, alkali or alkaline earth metal, the residue of ammonia or an amine and mixtures thereof, and n is a number from 1 to 50; an alkyldialkanolamide of the formula wherein R1 is alkyl of about 4 to about 54 carbon atoms and R 2 is alkyl of about 2 to about 6 carbon atoms, a metal deactivator; an additional corrosion inhibitor; water-soluble ethers or esters of ethoxylated C a -C 36 aliphatic monohydric or polyhydric alcohols or acids, sulfur compound additives selected from the group consisting of the ammonia, amine or metal salts of 2-mercaptobenzothiazole or 5-, 6- and 7-substituted 2-mercaptobenzothiazole, and sulfurized molybdenum and antimony compounds represented by the formula: wherein M is molybdenum or antimony and R is organic and is selected from the group consisting of C 3 -C 20 alkyl, aryl, alkylaryl radicals and mixtures thereof and thickener.