Composition and method of manufacturing overbased sulfonate modified lithium carboxylate grease
AssigneeNCH Corporation
InventorJ. Andrew Waynick
Life of this patent
Estimating the term…
Abstract
An overbased sulfonate modified lithium carboxylate grease composition and method of manufacture comprising overbased calcium sulfonate, overbased magnesium sulfonate, or both added to a source of lithium hydroxide, base oil, and optionally one or more acids when a complex grease is desired. When overbased sulfonate is added, the amount of dicarboxylic acid relative monocarboxylic acid may be reduced. Additionally, the amount of lithium hydroxide added may be less than stoichiometrically needed to react with the acids. A sulfonate modified lithium grease with improved thickener yield and dropping point may be made without multiple heating and cooling cycles or using a pressurized kettle.
Claims46
A method for making a lithium carboxylate grease comprising the steps of:
- adding and mixing an overbased calcium sulfonate or an overbased magnesium sulfonate or both with a base oil, lithium hydroxide, and water;
- wherein the lithium carboxylate grease is a simple grease or a complex grease.
A lithium carboxylate grease composition comprising the following ingredients:
- overbased magnesium sulfonate, overbased calcium sulfonate, or a combination thereof;
- lithium hydroxide;
- and
- a base oil;
- and
- wherein the lithium carboxylate grease is a simple grease or a complex grease.
Dependencies are inferred from the claim text.