The Lubrizol Corporation

David Cressey

David J Moreton

Virginia A Carrick

Stephen J Cook

Christopher L Friend

Michael R Sutton

Daniel C Visger

David Price

Daniel J Knapton

D John Durham

Rodney J Mcatee

John D Durham

A hydraulic fluid includes an oil of lubricating viscosity and at least 2 wt. % of an ester of a carboxy group-containing interpolymer comprising units derived from a vinyl aromatic monomer and units derived from a carboxylic acid monomer. The interpolymer also contains nitrogen functionality. The hydraulic fluid is at least substantially free of polyacrylates and polymethacrylates.

Hydraulic fluid composition

A linear compound and a metal salt or boron-containing metal salt thereof contains one or more carboxyl-containing phenol units or derivatives thereof and one or more on average at least Chydrocarbyl-substituted hydroxyaromatic units or derivatives thereof connected by one or more divalent bridging groups. A concentrate contains the linear compound or metal salt thereof and an organic diluent. A lubricating oil composition contains a minor amount of the linear compound or metal salt thereof and a major amount of a lubricating oil. Additional embodiments of the invention are processes to make the linear compound and the metal salt thereof.

Linear compounds containing phenolic and salicylic units

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.

Boron containing overbased calixarates and lubricants and methods thereof

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Belper, United Kingdom

David Cressey