Additive composition for hydraulic fluids or heat transfer fluids
OwnerOscar A. Domingoinventor
Life of this patent
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Abstract
An additive composition for a hydraulic fluid, or a heat transfer fluid, comprises one or more phosphate esters derived from the esterification of phosphoric acid and one or more monomer glycols containing up to 18 carbon atoms, or combinations thereof. In addition, the additive composition may comprise one or more corrosion inhibitors selected from the group consisting of dicarboxylic acids, alkanolamines or combinations thereof; one or more antioxidants including selected from the group consisting of one or more organosulfur compounds, one or inorganic oxyanion salts or combinations thereof; and, one or more surfactants.
Claims19
An additive composition for a hydraulic fluid, or a heat transfer fluid, comprising:
- one or more phosphate esters derived from the esterification of phosphoric acid and one or more monomer glycols wherein the one or more monomer glycols is selected from the group consisting of glycols that are C2 to C6 monomer glycols and the one or more phosphate esters is provided in an amount of about 30% to about 40% by weight of the additive composition;
- one or more corrosion inhibitors selected from the group consisting of dicarboxylic acids, alkanolamines or combinations thereof and the one or more corrosion inhibitors is provided in an amount of about 40% to about 60% by weight of the additive composition;
- one or more antioxidants selected from the group consisting of one or more organosulfur compounds, one or more oxyanion salts or combinations thereof, and the one or more antioxidants are provided in an amount of 50% to about 60% by weight of the additive composition;
- one or more surfactants and the one or more surfactants are provided in an amount of about 0.5% to about 1% by weight of the additive composition;
- and,
- wherein the one or more phosphate esters, corrosion inhibitors, antioxidants and surfactants are blended to form the additive composition.
The additive composition of 1, wherein in the one or more organosulfur compounds are selected from the group consisting of aromatic thiols, thiazoles, disulfides and polysulfides.
The additive composition of 3, wherein the organosulfur is 2-mercaptobenzothiazol.
An additive composition for a hydraulic fluid, or a heat transfer fluid, consisting of:
- one or more phosphate esters derived from the esterification of phosphoric acid and one or more monomer glycols including C2 to C6 monomer glycols;
- one or more dicarboxylic acids;
- one or more alkanolamines;
- one or more organosulfur compounds;
- one or more oxyanion salts;
- and,
- one or more surfactants.
Dependencies are inferred from the claim text.