Lubrication oil compositions

Abstract

This invention relates to compositions comprising (i) a base fluid stock comprising (a) a PTEEG fluid (a poly(trimethylene-ethylene ether)glycol that is a fluid at ambient temperature) and (b) an additive package comprising certain specified additive combinations, and lubrication oils containing the compositions.

1 . A lubrication oil composition comprising: (i) a base fluid stock comprising a poly(trimethylene-ethylene ether)glycol that is fluid at ambient temperature, and (ii) an additive package comprising:
 (a) an antiwear additive package comprising from about 0.5 to about 2.0 wt % (based on total composition weight) of a mixture comprising an amine phosphate antiwear additive and a phosphorothionate antiwear additive, and   (b) from about 0.1 to about 0.5 wt. % (based on total composition weight) of an additive that functions as an extreme pressure additive, as an antioxidant additive, or as an extreme pressure additive and an antioxidant additive.   
   
   
       2 . The lubrication oil composition of  claim 1  wherein the additive that functions as an extreme pressure additive, as an antioxidant additive, or as an extreme pressure additive and an antioxidant additive is a methylene bis(dialkyldithiocarbamate). 
   
   
       3 . The lubrication oil composition of  claim 1 , wherein the additive package further comprises at least one selected from the group consisting of:
 (c) from about 0.05 to about 2.0 wt % of a tolutriazole antioxidant/metal passivator additive;   (d) from about 0.05 to about 1.0 wt % of a primary antioxidant additive package selected from the group consisting of hindered amine antioxidants, hindered phenol antioxidants and mixtures thereof,   (e) from about 0.05 to about 0.3 wt % of a calcium sulfonate corrosion inhibitor; and   (f) from about 0.01 to about 2.0 wt % of at least one selected from thiadiazole metal passivators and disulfide metal passivators.   
   
   
       4 . The lubrication oil composition of  claim 3 , wherein the additive package comprises from about 0.1 to about 0.5 wt % of a tolutriazole antioxidant/metal passivator additive. 
   
   
       5 . The lubrication oil composition of  claim 3 , wherein the additive package comprises from about 0.1 to about 0.75 wt %, of a primary antioxidant additive package selected from the group consisting of hindered amine antioxidants, a hindered phenol antioxidants and mixtures thereof. 
   
   
       6 . The lubrication oil composition of  claim 3 , wherein the additive package comprises from about 0.05 to about 0.2 wt %, of a calcium sulfonate corrosion inhibitor. 
   
   
       7 . The lubrication oil composition of  claim 3 , wherein the additive package comprises from about 0.1 to about 0.5 wt % of at least one selected from thiadiazole metal passivators and disulfide metal passivators. 
   
   
       8 . The lubrication oil composition of  claim 1 , wherein the additive package further comprises a tolutriazole antioxidant/metal passivator additive in an amount of from about 0.05 to about 2.0 wt % (based on total composition weight). 
   
   
       9 . The lubrication oil composition of  claim 1 , wherein the additive package further comprises from about 0.05 to about 1.0 wt % (based on total composition weight) of a primary antioxidant additive package selected from the group consisting of a hindered amine antioxidant, a hindered phenol antioxidant and a mixture thereof. 
   
   
       10 . The lubrication oil composition of  claim 1 , wherein the additive package further comprises from about 0.01 to about 2.0 wt % (based on total composition weight) of one or a combination of a calcium sulfonate corrosion inhibitor, a thiadiazole metal passivator and a disulfide metal passivator. 
   
   
       11 . The lubrication oil composition of  claim 1  wherein the base fluid stock is about 50 wt % or greater, based on the total weight of the lubrication oil composition. 
   
   
       12 . The lubrication oil composition of  claim 11 , wherein the base fluid stock is about 75 wt % or greater, based on the total weight of the lubrication oil composition. 
   
   
       13 . The lubrication oil composition of  claim 11 , wherein the base fluid stock is about 95 wt % or greater, based on the total weight of the lubrication oil composition. 
   
   
       14 . The lubrication oil composition of  claim 1 , wherein the base fluid stock consists essentially of the poly(trimethylene-ethylene ether)glycol. 
   
   
       15 . The lubrication oil composition of  claim 1 , wherein the base fluid stock comprises a mixture of the poly(trimethylene-ethylene ether)glycol and a poly(trimethylene-ethylene ether)glycol ester. 
   
   
       16 . The lubrication oil composition of  claim 1 , wherein said lube oil additive is at least 50% miscible in the base fluid stock. 
   
   
       17 . The lubrication oil composition of  claim 1 , wherein said lube oil composition a substantially uniform mixture, with substantially no settling or phase separation, of the components. 
   
   
       18 . The lubrication oil of  claim 1 , wherein the poly(trimethylene-ethylene ether)glycol has a number average molecular weight of at least about 250 to less than about 10000. 
   
   
       19 . The lubrication oil composition of  claim 1 , wherein the poly(trimethylene-ethylene ether)glycol is prepared from biologically produced 1,3-propane diol.