Power transmitting fluids and additive compositions

Abstract

An additive composition and a power transmitting fluid including the additive composition having the following components: a dispersant, an antioxidant, an anti-foam agent, and a dihydrocarbyl hydrogen phosphite. Power transmitting fluids may be formulated to have enhanced wear protection performance and enhanced anti-shudder durability by including additive compositions including the forgoing components.

1 . A method of formulating a power transmitting fluid having enhanced wear protection performance comprising the steps of: 
 providing a major amount of a base oil;    providing a minor amount of an additive composition comprising a) a dispersant, b) an antioxidant, c) an anti-foam agent, and d) a dihydrocarbyl hydrogen phosphite;    combining the major amount of base oil with the minor amount of additive composition to form a power transmitting fluid;    wherein the power transmitting fluid has enhanced wear protection performance compared to a power transmitting fluid that does not include the additive composition.    
     
     
         2 . A method of formulating a power transmitting fluid as described in  claim 1 , where in the dispersant comprises about 0.1 to about 10 wt. % of the power transmitting fluid.  
     
     
         3 . A method of formulating a power transmitting fluid as described in  claim 1 , wherein the antioxidant comprises about 0.1 to about 3.0 wt. % of the power transmitting fluid.  
     
     
         4 . A method of formulating a power transmitting fluid as described in  claim 1 , wherein the anti-foam agent comprises about 0.01 to about 1.0 wt. % of the power transmitting fluid.  
     
     
         5 . A method of formulating a power transmitting fluid as described in  claim 1 , wherein the dihydrocarbyl hydrogen phosphite comprises about 0.01 to about 10 wt. % of the power transmitting fluid.  
     
     
         6 . A method of formulating a power transmitting fluid as described in  claim 1 , wherein the additive composition further comprises one or more of a sulfur-based extreme pressure additive, a friction modifier, an anti-rust package, a viscosity index improver, a detergent, and a diluent oil.  
     
     
         7 . A method of formulating a power transmitting fluid as described in  claim 1 , wherein the dihydrocarbyl hydrogen phosphite comprises hydrocarbonyl groups, each independently having about 10 to about 30 carbon atoms arranged linearly or in branched or iso-alkyl isomeric forms.  
     
     
         8 . A method of formulating a power transmitting fluid as described in  claim 1 , wherein the dihydrocarbyl hydrogen phosphite comprises dioleyl hydrogen phosphite.  
     
     
         9 . A method of formulating a power transmitting fluid as described in  claim 1 , further wherein the power transmitting fluid has enhanced anti-shudder durability compared to a power transmitting fluid that does not include the additive composition.  
     
     
         10 . A method of formulating a power transmitting fluid as described in  claim 1 , wherein the fluid is suitable for use in a transmission employing one or more of a slipping torque converter, a lock-up torque converter, a starting clutch, and one or more shifting clutches.  
     
     
         11 . A method of formulating a power transmitting fluid as described in  claim 10 , wherein the fluid is suitable for use in a belt, chain, or disk-type continuously variable transmission.  
     
     
         12 . A method of formulating a power transmitting fluid having enhanced anti-shudder durability comprising the steps of: 
 providing a major amount of a base oil;    providing a minor amount of an additive composition comprising a) a dispersant, b) an antioxidant, c) an anti-foam agent, and d) a dihydrocarbyl hydrogen phosphite;    combining the major amount of base oil with the minor amount of additive composition to form a power transmitting fluid;    wherein the power transmitting fluid has enhanced anti-shudder durability compared to a power transmitting fluid that does not include the additive composition.    
     
     
         13 . A method of formulating a power transmitting fluid as described in  claim 12 , wherein the dispersant comprises about 0.1 to about 10 wt. % of the power transmitting fluid.  
     
     
         14 . A method of formulating a power transmitting fluid as described in  claim 12 , wherein the antioxidant comprises about 0.1 to about 3.0 wt. % of the power transmitting fluid.  
     
     
         15 . A method of formulating a power transmitting fluid as described in  claim 12 , wherein the anti-foam agent comprises about 0.01 to about 1.0 wt. % of the power transmitting fluid.  
     
     
         16 . A method of formulating a power transmitting fluid as described in  claim 12 , wherein the dihydrocarbyl hydrogen phosphite comprises about 0.01 to about 10 wt. % of the power transmitting fluid.  
     
     
         17 . A method of formulating a power transmitting fluid as described in  claim 12 , wherein the additive composition further comprises one or more of a sulfur-based extreme pressure additive, a friction modifier, an anti-rust package, a viscosity index improver, a detergent, and a diluent oil.  
     
     
         18 . A method of formulating a power transmitting fluid as described in  claim 12 , wherein the dihydrocarbyl hydrogen phosphite comprises hydrocarbonyl groups, each independently having about 10 to about 30 carbon atoms arranged linearly or in branched or iso-alkyl isomeric forms.  
     
     
         19 . A method of formulating a power transmitting fluid as described in  claim 12 , wherein the dihydrocarbyl hydrogen phosphite comprises dioleyl hydrogen phosphite.  
     
     
         20 . A method of formulating a power transmitting fluid as described in  claim 12 , wherein the fluid is suitable for use in a transmission employing one or more of a slipping torque converter, a lock-up torque converter, a starting clutch, and one or more shifting clutches.  
     
     
         21 . A method of formulating a power transmitting fluid as described in  claim 20 , wherein the fluid is suitable for use in a belt, chain, or disk-type continuously variable transmission.  
     
     
         22 . A power transmitting fluid additive composition comprising: 
 a dispersant;    an antioxidant;    an anti-foam agent; and    a dihydrocarbyl hydrogen phosphite.    
     
     
         23 . A power transmitting fluid additive composition as described in  claim 22 , wherein the dispersant comprises about 0.4 to about 40 wt. % of the additive composition.  
     
     
         24 . A power transmitting fluid additive composition as described in  claim 22 , wherein the antioxidant comprises about 0.4 to about 12 wt. % of the additive composition.  
     
     
         25 . A power transmitting fluid additive composition as described in  claim 22 , wherein the anti-foam agent comprises about 0.04 to about 4.0 wt. % of the additive composition.  
     
     
         26 . A power transmitting fluid additive composition as described in  claim 22 , wherein the dihydrocarbyl hydrogen phosphite comprises about 0.04 to about 40 wt. % of the additive composition.  
     
     
         27 . A power transmitting fluid additive composition as described in  claim 22 , wherein the additive composition further comprises one or more of a sulfur-based extreme pressure additive, a friction modifier, an anti-rust package, a viscosity index improver, a detergent, and a diluent oil.  
     
     
         28 . A power transmitting fluid additive composition as described in  claim 22 , wherein the dihydrocarbyl hydrogen phosphite comprises hydrocarbonyl groups, each independently having about 10 to about 30 carbon atoms arranged linearly or in branched or iso-alkyl isomeric forms.  
     
     
         29 . A power transmitting fluid additive composition as described in  claim 22 , wherein the dihydrocarbyl hydrogen phosphite comprises dioleyl hydrogen phosphite.  
     
     
         30 . A power transmitting fluid additive composition as described in  claim 22 , wherein the additive composition is suitable for use in a transmission employing one or more of a slipping torque converter, a lock-up torque converter, a starting clutch, and one or more shifting clutches.  
     
     
         31 . A power transmitting fluid additive composition as described in  claim 30 , wherein the additive composition is suitable for use in a belt, chain, or disk-type continuously variable transmission.  
     
     
         32 . A power transmitting fluid comprising: 
 a) a base oil; and    b) an additive composition comprising: 
 a dispersant;  
 an antioxidant;  
 an anti-foam agent; and  
 a dihydrocarbyl hydrogen phosphite.  
   
     
     
         33 . A power transmitting fluid as described in  claim 32 , wherein the dispersant comprises about 0.1 to about 10 wt. % of the power transmitting fluid.  
     
     
         34 . A power transmitting fluid as described in  claim 32 , wherein the antioxidant comprises about 0.1 to about 3.0 wt. % of the power transmitting fluid.  
     
     
         35 . A power transmitting fluid as described in  claim 32 , wherein the anti-foam agent comprises about 0.01 to about 1.0 wt. % of the power transmitting fluid.  
     
     
         36 . A power transmitting fluid as described in  claim 32 , wherein the dihydrocarbyl hydrogen phosphite comprises about 0.01 to about 10 wt. % of the power transmitting fluid.  
     
     
         37 . A power transmitting fluid as described in  claim 32 , wherein the additive composition further comprises one or more of a sulfur-based extreme pressure additive, a friction modifier, an anti-rust package, a viscosity index improver, a detergent, and a diluent oil.  
     
     
         38 . A power transmitting fluid as described in  claim 32 , wherein the dihydrocarbyl hydrogen phosphite comprises hydrocarbonyl groups, each independently having about 10 to about 30 carbon atoms arranged linearly or in branched or iso-alkyl isomeric forms.  
     
     
         39 . A power transmitting fluid as described in  claim 32 , wherein the dihydrocarbyl hydrogen phosphite comprises dioleyl hydrogen phosphite.  
     
     
         40 . A power transmitting fluid as described in  claim 32 , wherein the fluid is suitable for use in a transmission employing one or more of a slipping torque converter, a lock-up torque converter, a starting clutch, and one or more shifting clutches.  
     
     
         41 . A power transmitting fluid as described in  claim 40 , wherein the fluid is suitable for use in a belt, chain, or disk-type continuously variable transmission.