Grease composition
AssigneeMobil Oil Corporation
InventorsJohn P. Doner, Andrew G. Horodysky, John A. Keller
Life of this patent
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Abstract
Improved grease compositions, wherein the grease is thickened with a hydroxy-carboxylate soap grease thickener, preferably a lithium 12-hydroxy stearate, and a means for increasing the dropping point which is a borated n-hydrocarbyl propylenediamine and optionally compounds containing phosphorus and/or sulfur moieties are disclosed.
Claims23
A method of improving the dropping point of a grease composition comprising blending a major proportion of (1) a grease vehicle, (2) from about 0.01% to about 10% by weight of a means for increasing the dropping point of the grease composition comprising the reaction product made by reacting an amine of the formula ##STR3## wherein R is a hydrocarbon group containing from 6 to 20 carbon atoms with boric acid, and (3) a thickener containing at least about 15% by weight of a 12-hydroxy-stearate thickener.
In a method of making a grease wherein a soap of 12-hydroxystearic acid is the grease thickener wherein the improvement comprises mixing a major proportion of a grease vehicle with from about 0.01% to about 10% by weight of a means for increasing the dropping point of a grease made by reacting an amine of the formula ##STR5## wherein R is a hydrocarbon group containing from 6 to 20 carbon atoms with boric acid, and thickening said grease with a thickener containing at least about 15% by weight of a 12-hydroxystearate thickener.
Dependencies are inferred from the claim text.