Phosphonium ionic liquids are unique materials that exhibit remarkable thermal stability, low flammability and high viscosity indices. These non-volatile materials reduce wear, exhibit high loading capacities and form effective boundary films for extreme pressure applications. The highly tunable nature of phosphonium ionic liquids provides them with an exceptionally diverse range of physical properties including variable viscosity, miscibility with base oils as well as compatibility with additives and materials. The ionic nature of the phosphonium salts also imparts electrical conductivity to the lubricant formulation. Here we report bulk physical properties of a number of novel phosphonium ionic liquids as well as their solubility data in synthetic base oils.

Preparation, properties, and solubility of phosphonium ionic liquids as lubricant additives in synthetic base oils

244th National Meeting (2012)

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