US 11,884,892 B1
Antiwear system for improved copper corrosion
Brandon Knouse, Moseley, VA (US); David Edwards, Richmond, VA (US); Magdalena Makowska, Mechanicsville, VA (US); Keith Hayes, Chesterfield, VA (US); and Gregory James, Glen Allen, VA (US)
Assigned to Afton Chemical Corporation, Richmond, VA (US)
Filed by Afton Chemical Corporation, Richmond, VA (US)
Filed on Mar. 31, 2023, as Appl. No. 18/193,789.
This patent is subject to a terminal disclaimer.
Int. Cl. C10M 137/10 (2006.01); C10M 169/04 (2006.01); C07F 9/17 (2006.01); C10N 30/06 (2006.01)
CPC C10M 137/10 (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)] 27 Claims
OG exemplary drawing
 
1. A lubricating composition comprising:
a majority of one or more base oils of lubricating viscosity;
an organometallic phosphorus-providing antiwear additive or salt thereof 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) neutralizing the condensate with a basic or neutral metal compound including one or more of a metal oxide, a metal hydroxide, or a metal carbonate to form the organometallic phosphorus-providing antiwear additive or salt thereof.