Water-based lubricating grease compositions and methods for using the same
AssigneeFuchs Petrolub SE
InventorsNael Zaki, H. Ray Enyard, Jr.
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Abstract
A water-based lubricating grease composition includes at least 40 wt % water; a salt-based thickener; a polymer-based thickener; and optionally, an inorganic solid-based thickener. A process for preparing the water-based lubricating grease composition may include blending a suitable amount of water with a salt-based thickener to provide a thickened water-based grease, wherein the salt-based thickener is obtained from contacting a base with a fat; and adding a polymer-based thickener to the thickened water-based grease.
Claims13
A composition comprising:
- at least 55 wt % water;
- a salt-based thickener comprising a potassium, sodium, calcium, or magnesium salt of a C8-C32 fatty acid, a dicarboxylic acid, or a hydroxy fatty acid;
- a polymer-based thickener comprising lignin sulfonate;
- and
- an inorganic solid-based thickener comprising talc, fumed silica, and hydrophobized fumed silica;
- wherein the fumed silica and hydrophobized fumed silica are present in a weight ratio of 1:1 and the composition is a water-based lubricating grease, and
- wherein the composition does not comprise an oil.
A process for preparing a water-based lubricating grease composition comprising at least 55 wt % water, a salt-based thickener comprising a potassium, sodium, calcium, or magnesium salt of a C8-C32 fatty acid, a dicarboxylic acid, or a hydroxy fatty acid, a polymer-based thickener comprising lignin sulfonate, and an inorganic solid-based thickener comprising talc, fumed silica, and hydrophobized fumed silica, the process comprising:
- blending a suitable amount of water with the salt-based thickener to provide a thickened water-based grease, wherein the salt-based thickener is obtained from contacting a base with a fat;
- adding the polymer-based thickener to the thickened water-based grease;
- and
- adding an inorganic solid-based thickener to the thickened water-based grease to provide the water-based lubricating grease composition;
- wherein the fumed silica and hydrophobized fumed silica are present in a weight ratio of 1:1, and
- wherein the composition does not comprise an oil.
Dependencies are inferred from the claim text.