Composition and method of manufacturing calcium magnesium sulfonate greases without a conventional non-aqueous converting agent
AssigneeNCH Corporation
InventorJ. Andrew Waynick
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Abstract
An overbased calcium magnesium sulfonate grease composition and method of making such grease without using any conventional non-aqueous converting agents, such as hexylene glycol, as a pre-conversion ingredient. The addition of magnesium sulfonate as an ingredient prior to conversion appears to act as a new, non-conventional converting agent, resulting in greases with improved thickener yield and excellent dropping point.
Claims35
A method of making a sulfonate-based grease comprising:
- adding and mixing an amount of overbased calcium sulfonate containing amorphous calcium carbonate dispersed therein, an amount of overbased magnesium sulfonate, an optional amount of base oil, and water to form a pre-conversion mixture;
- converting the pre-conversion mixture to a converted mixture by heating until conversion of the amorphous calcium carbonate to crystalline calcium carbonate has occurred;
- and
- wherein no conventional non-aqueous converting agents are added to the pre-conversion mixture.
A sulfonate-based grease composition comprising the following ingredients:
- overbased calcium sulfonate, overbased magnesium sulfonate, water, and an optional base oil;
- and wherein water is the sole conventional converting agent.
The sulfonate-based grease composition according to 25 wherein the amount of alkali metal hydroxide is 0.005-0.5%.
The sulfonate-based grease composition according to 25 wherein the total amount of one or more complexing acids is 1.25-18%.
A pre-conversion sulfonate-based grease composition comprising the following ingredients:
- overbased calcium sulfonate, overbased magnesium sulfonate, water, and an optional base oil;
- and wherein water is the sole conventional converting agent.
Dependencies are inferred from the claim text.