High performance lubricating compositions

Abstract

An oleaginous corrosion-resistant lubricating composition comprising at least one alpha-olefin synthetic oil and effective amounts of metal salts of sulfonic acids/carboxylic acids, alkylated aromatic compounds as solubility modifiers, pour-point depressants, at least one antioxidant, and metal deactivators.

1 . A corrosion-preventing free-flowing lubricating composition consisting essentially of, in parts by weight, from about 70 to 85 parts of poly-alphaolefin synthetic lubricating oil, from about 5 to 15 parts of at least one metal salt of an alkylnaphthalenesulfonic acid/carboxylic acid compound, from about 0.1 to 1.0 part of an oil soluble pour-point depressant; from about 0.1 to 2.0 parts of at least one antioxidant, from about 0.1 to 0.5 parts of a metal deactivator and from about 5.0 to 15 parts of an alkylated aromatic compound. 
     
     
         2 . The composition of  claim 1  wherein the free-flowing lubricant is a mixture of poly-alpha olefin oils having different viscosities and boiling points. 
     
     
         3 . The composition of  claim 1  wherein the free-flowing lubricant is a mixture of poly-alpha olefin lubricating oils having a kinematic viscosity of 1509 at −40° C. 
     
     
         4 . The composition of  claim 1  wherein the pour-point depressant comprises hydrated distillate heavy paraffinic compounds. 
     
     
         5 . The composition of  claim 1  wherein the metal salt is an alkaline earth metal salt of a dialkylnaphthalenesulfonic acid/carboxylic acid compound. 
     
     
         6 . The composition of  claim 1  wherein the alkylnaphthalenesulfonic acid/carboxylic acid metal salt compound is a dialkylnaphthalenesulfonic acid/carboxylic acid metal compound wherein the alkyl group of said sulfonic acid has two to twelve carbon atoms. 
     
     
         7 . The composition of  claim 6  wherein the alkyl group of said sulfonic acid has nine carbon atoms. 
     
     
         8 . The composition of  claim 6  wherein the metal salt is an alkaline earth metal salt of dialkylnaphthalenesulfonic acid/carboxylic acid compound. 
     
     
         9 . The composition of  claim 6  wherein the pour-point depressant is an acrylic compound. 
     
     
         10 . The composition of  claim 1  wherein at least one antioxidant is a diphenyl amine. 
     
     
         11 . A process of preventing corrosion of metal which comprises applying an effective amount of a corrosion-preventing free-flowing lubricating composition on said metal; said composition consisting essentially of, in parts by weight, from about 70 to 85 parts of a poly-alpha-olefin lubricating oil, from about 5 to 15 parts of at least one metal salt of an alkylnapthalenesulfonic acid/carboxylic acid compound, from about 0.1 to 1.0 part of an oil soluble pour-point depressant, from about 0.1 to 2.0 parts of an antioxidant, from about 0.1 to 0.5 parts of a metal deactivator and from about 5.0-15 parts of an alkylated aromatic compound. 
     
     
         12 . The process of  claim 11  wherein the alpha-olefin synthetic oil is a mixture of synthetic oils having different viscosities. 
     
     
         13 . The process of  claim 11  wherein the pour-point depressant is hydrotreated distillate heavy paraffinic compound. 
     
     
         14 . The process of  claim 11  wherein the metal salt is an alkaline earth metal salt of the alkylnaphthalene sulfonic acid/ carboxylic acid compound. 
     
     
         15 . The process of  claim 11  wherein the metal salt is a dialkylnaphthalene sulfonic acid/fatty acid metal compound. 
     
     
         16 . The process of  claim 11  wherein the alkyl group of the alkylnaphthalene sulfonic acid has from 7 to 9 carbon atoms. 
     
     
         17 . The process of  claim 11  wherein the metal salt of the acids is a salt of an alkaline earth compound. 
     
     
         18 . The process of  claim 11  wherein the pour-point depressant is an ester of methacrylic acid. 
     
     
         19 . The process of  claim 11  wherein the antioxidant is a diphenylamine 
     
     
         20 . The process of  claim 11  wherein the lubricating composition has a viscosity of 1509 at −40° C. and the synthetic lubricating oil ranges from about 75 to 80 parts by weight of the composition.