CPC C10M 137/105 (2013.01) [C07F 9/17 (2013.01); C10M 169/04 (2013.01); C10M 2203/003 (2013.01); C10M 2223/047 (2013.01); C10N 2030/06 (2013.01); C10N 2040/08 (2013.01)] | 28 Claims |
1. A lubricating composition comprising:
a majority of one or more base oils of lubricating viscosity; and
an oil-soluble phosphorus antiwear additive made by a process comprising the steps of (a) reacting an organic hydroxy compound with phosphorus pentasulfide to form a reaction product; (b) distilling the reaction product and recovering a condensate; and (c) reacting the condensate with an unsaturated carboxylic acid to form the oil-soluble phosphorus antiwear additive.
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