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Calcium sulfonates

Calcium sulfonates are alkylated aromatic sulfonates, and are divided into neutral and overbased types. Typical overbased sulfonates have a total base number (TBN) of 300 or 400.


Calcium sulfonates are used particularly in metal working fluids and lubricants. They function as corrosion protectors, extreme pressure additives (EP) or emulsifiers. They also serve as thickeners for lubricating greases.

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Surface and Lubricant Technology