Lubricating Compositions Containing Polyetheramines

Abstract

Provided are lubricating compositions comprising in admixture at least 40 wt % of a base stock selected from the group consisting of Group I, Group II, Group III, Group IV and Group V base stocks, or any combination thereof, and one or more polyetheramines. Also provided are methods of improving the friction and wear properties of a base stock selected from the group consisting of Group I, Group II, Group III, Group IV and Group V base stocks, or any combination thereof, comprising blending the base stock with one or more polyetheramines, to form a lubricating composition.

1 . A lubricating composition, comprising in admixture:
 at least 40 wt % of a base stock selected from the group consisting of Group I, Group II, Group III, Group IV and Group V base stocks, or any combination thereof; and   one or more polyetheramines.   
     
     
         2 . The lubricating composition of  claim 1 , wherein the polyetheramines each have a molecular weight of from about 80 up to about 1000. 
     
     
         3 . The lubricating composition of  claim 1 , wherein the polyetheramines are present in an amount of from about 1 wt % up to about 20 wt % of the composition. 
     
     
         4 . The lubricating composition of  claim 1 , wherein the base stock is a Group IV base stock, or a blend of Group IV base stocks. 
     
     
         5 . The lubricating composition of  claim 1 , wherein the kinematic viscosity at 100° C. of the composition is from about 4 cSt up to about 20 cSt. 
     
     
         6 . The lubricating composition of  claim 1 , further comprising one or more additives chosen from the group consisting of friction modifiers, antiwear additives, viscosity improvers, detergents, dispersants, antioxidants, pour point depressants, anti-foam agents, demulsifiers, corrosion inhibitors, seal compatibility additives, antirust additives, and co-base stocks. 
     
     
         7 . The lubricating composition of  claim 6 , wherein the additive or additives are present in an amount of up to about 20 wt % of the composition. 
     
     
         8 . The lubricating composition of  claim 1 , further comprising a co-base stock. 
     
     
         9 . The lubricating composition of  claim 8 , wherein the co-base stock is one or more chosen from the group consisting of esters and alkylated naphthalenes. 
     
     
         10 . The lubricating composition of  claim 1 , wherein polyetheramine is JEFFAMINE D-230 or JEFFAMINE D-400, or a combination thereof. 
     
     
         11 . A method of improving the oxidative stability and frictional properties of a base stock selected from the group consisting of Group I, Group II, Group III, Group IV and Group V base stocks, or any combination thereof comprising:
 blending the base stock with one or more polyetheramines, to form a lubricating composition.   
     
     
         12 . The method of  claim 11  wherein the polyetheramines each have a molecular weight of from about 80 up to about 1000. 
     
     
         13 . The method of  claim 11  wherein the polyetheramines are present in an amount of from about 1 wt % up to about 20 wt % of the composition. 
     
     
         14 . The method of  claim 11  wherein the base stock is a Group IV base stock, or a blend of Group IV base stocks. 
     
     
         15 . The method of  claim 11  wherein the kinematic viscosity at 100° C. of the composition is from about 4 cSt up to about 20 cSt. 
     
     
         16 . The method of  claim 11  further comprising blending in one or more additives chosen from the group consisting of friction modifiers, antiwear additives, viscosity improvers, detergents, dispersants, antioxidants, pour point depressants, anti-foam agents, demulsifiers, corrosion inhibitors, seal compatibility additives, antirust additives, and co-base stocks. 
     
     
         17 . The method of  claim 11  wherein the additive or additives are present in an amount of up to about 20 wt % of the composition. 
     
     
         18 . The method of  claim 11  further comprising blending in a co-base stock. 
     
     
         19 . The method of  claim 18 , wherein the co-base stock is one or more chosen from the group consisting of esters and alkylated naphthalenes. 
     
     
         20 . The method of  claim 11 , wherein the polyetheramine is JEFFAMINE D-230 or JEFFAMINE D-400, or a combination thereof.