Ashless additive composition

Abstract

This disclosure describes an ashless lubricant additive. The additive is a tertiary amine-containing compound having the following structure:where R1 and R2 are independently a linear or branched-chain monovalent hydrocarbyl group having two to about twenty carbon atoms, each m is independently from 0 to 2, each p is independently from 0 to 2, for each cyclic moiety m+p is from 2 to 4, and each n is independently from 1 to 6.

1 . An ashless additive composition comprising:
 A tertiary amine-containing compound having the following structure:   
       
         
           
           
               
               
           
         
         wherein R 1  and R 2  are independently a linear or branched-chain monovalent hydrocarbyl group having two to about twenty carbon atoms, each m is independently from 0 to 4, each p is independently from 0 to 4, for each cyclic moiety m+p is from 2 to 4, and each n is independently from 1 to 6. 
       
     
     
         2 . The ashless additive composition of  claim 1 , wherein the linear or branched-chain monovalent hydrocarbyl group is a branched C 12  to C 20  alkenyl group. 
     
     
         3 . The ashless additive composition of  claim 1 , wherein the linear or branched-chain monovalent hydrocarbyl group is a branched C 18  to C 20  alkenyl group. 
     
     
         4 . A lubricating oil composition comprising:
 a major amount of a base oil; and   an ashless tertiary amine-containing compound having the following structure:   
       
         
           
           
               
               
           
         
         wherein R 1  and R 2  are independently a linear or branched-chain monovalent hydrocarbyl group having two to about twenty carbon atoms, each m is from 0 to 4, each p is from 0 to 4, for each cyclic moiety m+p is from 2 to 4, and each n is independently from 1 to 6. 
       
     
     
         5 . The lubricating oil composition of  claim 4 , wherein the linear or branched-chain monovalent hydrocarbyl group is a branched C 12  to C 20  alkenyl group. 
     
     
         6 . The lubricating oil composition of  claim 4 , wherein the linear or branched-chain monovalent hydrocarbyl group is a branched C 18  to C 20  alkenyl group. 
     
     
         7 . The lubricating oil composition of  claim 4 , wherein the tertiary amine-containing compound is present in about 0.1 to 2 wt % by weight of the lubricating oil composition. 
     
     
         8 . The lubricating oil composition of  claim 4 , wherein the lubricating oil composition is a hydraulic fluid, a slide way lubricant, automatic transmission fluid, continuously variable transmission fluid, battery electric vehicle, hybrid electric vehicle transmission fluid, or gear oil. 
     
     
         9 . The lubricating oil composition of  claim 4 , further comprising:
 a friction modifier, ashless anti-wear additive, antioxidant, metal deactivator, seal swell additive, foam inhibitor, or viscosity modifier.   
     
     
         10 . An ashless additive composition comprising diamide product of a reaction comprising:
 a hydrocarbyl-substituted succinic anhydride represented by the following structure:   
       
         
           
           
               
               
           
         
       
       wherein R 1  is a linear or branched-chain monovalent hydrocarbyl group having two to about twenty carbon atoms; and
 a cyclic polyamine represented by the following structure: 
 
       
         
           
           
               
               
           
         
       
       wherein R 2  is a linear or branched-chain monovalent hydrocarbyl group having two to about twenty carbon atoms, m is from 0 to 4, p is from 0 to 4, m+p is from 2 to 4, and n is from 1 to 6; and 
       wherein the hydrocarbyl-substituted succinic anhydride to cyclic polyamine ratio is about 1.5:1 to about 1.6:1. 
     
     
         11 . The ashless additive composition of  claim 10 , wherein the piperazine is aminoethyl piperazine, aminopropyl piperazine, aminobutyl piperazine, aminoethyl diazepane, or aminoethyl diazocane. 
     
     
         12 . A method for modifying friction in an engine, the method comprising lubricating said engine with a lubricating oil composition comprising:
 a major amount of base oil of lubricating viscosity; and   an ashless additive composition having the following structure:   
       
         
           
           
               
               
           
         
       
       wherein R 1  and R 2  are independently a linear or branched-chain monovalent hydrocarbyl group having two to about twenty carbon atoms, each m is independently from 0 to 4, each p is independently from 0 to 4, for each cyclic moiety m+p is from 2 to 4, and each n is independently from 1 to 6. 
     
     
         13 . The method of  claim 12 , wherein the linear or branched-chain monovalent hydrocarbyl group is a branched C 12  to C 20  alkenyl group. 
     
     
         14 . The method of  claim 12 , wherein the linear or branched-chain monovalent hydrocarbyl group is a branched C 18  to C 20  alkenyl group. 
     
     
         15 . A method of boosting total base number in a lubricating oil, the method comprising blending base oil and an ashless additive composition having the following structure: 
       
         
           
           
               
               
           
         
         wherein R 1  and R 2  are independently a linear or branched-chain monovalent hydrocarbyl group having two to about twenty carbon atoms, each m is independently from 0 to 4, each p is independently from 0 to 4, for each cyclic moiety m+p is from 2 to 4, and each n is independently from 1 to 6.