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US 6,673,751 B1Granted
Boron containing overbased calixarates and lubricants and methods thereof
AssigneeThe Lubrizol Corporation
InventorsDavid Cressey, David J. Moreton, D. John Durham
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Abstract
A composition comprises a sulphur- and phosphorus-free, boron-containing overbased metal salt of a calixarene. The boron-containing overbased calixarene is useful in a lubricant additive composition, a lubricant composition, and a method to lubricate an internal combustion engine. The boron-containing overbased calixarene advantageously provides detergent and antiwear performance and does so without increasing the sulphur or phosphorus content of a lubricant additive or lubricant composition.
Claims18
A composition, comprising:
- a boron-containing overbased metal salt of a calixarene wherein the calixarene has at least one substituent hydroxyl group capable of reacting with a metal base to form the metal salt;
- and the boron-containing overbased metal salt of the calixarene is free of sulphur and phosphorus.
Dependencies are inferred from the claim text.