Grease Composition
AssigneeThe Lubrizol Corporation
InventorsRichard A. Denis, Stephen J. Nolan
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Abstract
The disclosed invention relates to a biodegradable grease composition. The grease composition comprises the reaction product of a dispersion of metal oxide and/or hydroxide particulates with at least one animal or vegetable oil. The dispersion comprises an organic medium and has a water content of up to about 0.5% by weight water. The particulates have a mean particle size up to about 15 microns. A process for making a grease composition using a dispersion of metal oxide and/or hydroxide particulates is disclosed.
Claims26
A biodegradable grease composition comprising the reaction product of a dispersion of metal oxide and/or hydroxide particulates with at least one animal and/or vegetable oil, the dispersion comprising an organic medium and the metal oxide and/or hydroxide particulates dispersed in the organic medium, the dispersion having a water content of up to about 0.5% by weight, the particulates having a mean particle size in the range up to about 15 microns, the reaction product having a grease consistency.
A process for making grease, comprising:
- (A) forming a slurry comprising metal oxide and/or hydroxide solids, water and an organic medium;
- (B) milling the slurry to form a water-in-oil emulsion comprising metal oxide and/or hydroxide particulates;
- (C) dehydrating the emulsion to form a dispersion of the metal oxide and/or hydroxide particulates in the organic medium;
- and
- (D) mixing the dispersion with at least one animal and/or vegetable oil and reacting the metal oxide and/or hydroxide particulates with the animal and/or vegetable oil under conditions sufficient to thicken the oil to a grease consistency.
Dependencies are inferred from the claim text.