Patent ID: 9708563
Date: 2017-07-18
CPC Classifications: C10M,C10N

Claim:
1. A lubricating composition comprising 0.1 to 1.5 wt % of a nitrile compound wherein said nitrile compound is (i) a hydrocarbyl-2-cyanoacetate, (ii) a 2-cyano-N,N-dihydrocarbylacetamide, (iii) a S-hydrocarbyl-2-cyanoethanethioate, (iv) a 2-cyanoethanethioic S-acid, or (v) a compound derived from the reaction of a cyano-substituted carboxylic acid with an alcohol, a thiol, an amine or an aminoalcohol; 0.05 to 2 wt % of a compound which is a derivative of a hydroxy-carboxylic acid, represented by the formula: wherein n and m are independently integers of 1 to 5; X is an aliphatic or alicyclic group, or an aliphatic or alicyclic group containing an oxygen atom in the chain, or a substituent group of the foregoing types, said group containing up to 6 carbon atoms and having n+m available points of attachment; each Y is independently —O—, >NH, or >NR each R 0.05 to 12 wt % of dispersant, 0 to 5 wt % of a dispersant viscosity modifier, 0 to 15 wt % of overbased detergent, 0 to 15 wt % of antioxidant, 0 to 10 wt % antiwear agent, 0 to 10 wt % viscosity modifier, 0 to 10 wt % of at least one of metal deactivators, corrosion inhibitors, extreme pressure agents, foam inhibitors, demulsifiers, pour point depressants, seal swelling agents and mixtures thereof, 0 wt % friction modifier, balance to 100% of an oil of lubricating viscosity, wherein the lubricating composition is characterized as having a phosphorus content of 200 ppm to 600 ppm.