Antiwear Agent and Lubricating Compositions Thereof

Abstract

The present invention relates to an antiwear agent and lubricating compositions thereof. The invention further provides for a method of lubricating a driveline device or a grease application by employing a lubricating composition containing the antiwear agent.

1 . A lubricating composition comprising: L an oil of lubricating viscosity; (b) a sulphur-free amine salt of either (i) a hydroxy-substituted di-ester of phosphoric acid, or (ii) a phosphorylated hydroxy-substituted di- or tri-ester of phosphoric acid; and (c) an organo-sulphide, or mixtures thereof. 
   
   
       2 . The lubricating composition of  claim 1 , wherein the sulphur-free amine salt comprises a hydroxy-substituted di-ester of phosphoric acid of a phosphorylated hydroxy-substituted di- or tri-ester of phosphoric acid. 
   
   
       3 . The lubricating composition of  claim 1 , wherein the sulphur-free amine salt is represented by Formula (1a): 
     
       
         
         
             
             
         
       
     
     wherein
 A and A′ are independently H, or a hydrocarbyl group containing about 1 to about 30 carbon atoms; 
 each R and R″ group are independently a hydrocarbyl group; 
 each R′ is independently R, H, or a hydroxyalkyl group; 
 Y is independently R′, or a group represented by RO(R′O)P(O)—CH(A′)CH(A)-; 
 x ranges from about 0 to about 1, with the proviso that when x=0, R′ is a hydroxyalkyl group; and
 m and n are both positive non-zero integers, with the proviso that the sum of (m+n) is equal to about 4. 
 
 
   
   
       4 . (canceled) 
   
   
       5 . The lubricating composition of  claim 3 , wherein x is about 1. 
   
   
       6 . The lubricating composition of  claim 3 , wherein x is about 0. 
   
   
       7 . The lubricating composition of  claim 3 , wherein m is equal to about 3; and n is equal to about 1. 
   
   
       8 . The lubricating composition of  claim 3 , wherein A and A′ independently contain about 2 to about 4 carbon atoms. 
   
   
       9 . The lubricating composition of  claim 3 , wherein R, R′ and R″ all independently contain about 4 to about 20 carbon atoms. 
   
   
       10 . (canceled) 
   
   
       11 . The composition of  claim 1 , wherein the organo-sulphide comprises at least one of a polysulphide, a thiadiazole compound, or mixtures thereof. 
   
   
       12 . The lubricating composition of  claim 1  further comprises a borated polyisobutylene succinimide. 
   
   
       13 . The lubricating composition of  claim 1  further comprises a phosphorus antiwear or extreme pressure agent, or mixtures thereof. 
   
   
       14 . The lubricating composition of  claim 1 , wherein the conventional phosphorus antiwear or extreme pressure agent is selected from the group consisting of non-ionic phosphorus compound, an amine salt of a mixture of monoalkyl and dialkyl phosphoric acid esters, a metal dialkyldithiophosphate, a metal dialkylphosphate, and mixtures thereof. 
   
   
       15 . The lubricating composition of  claim 1  further comprises a friction modifier. 
   
   
       16 - 20 . (canceled) 
   
   
       21 . A lubricating composition comprising: an oil of lubricating viscosity; an organo-sulphide, or mixtures thereof; and a sulphur-free amine salt of a phosphorus compound obtained/obtainable by a process comprising either (A) or (B):
 wherein (A) comprises reacting: (i) a hydroxy-substituted di-ester of phosphoric acid; and (ii) an oxygen-containing inorganic phosphorus compound to form an acidic phosphorus compound; and reacting the acidic phosphorus compound with an amine;   or   wherein (B) comprises reacting a hydroxy-substituted di-ester of phosphoric acid with an amine.   
   
   
       22 . A method of lubricating a driveline device comprising supplying to the driveline device a lubricating composition comprising a sulphur the lubricating composition of  claim 1 . 
   
   
       23 - 26 . (canceled) 
   
   
       27 . A lubricating composition comprising: (a) an oil of lubricating viscosity; (b) a sulphur-free amine salt of either (i) a hydroxy-substituted di-ester of phosphoric acid, or (ii) a phosphorylated hydroxy-substituted di- or tri-ester of phosphoric acid; and (c) a grease thickener. 
   
   
       28 . The lubricating composition of  claim 27 , wherein the grease thickener is derived from a carboxylic acid and/or ester. 
   
   
       29 . The lubricating composition of  claim 27 , wherein the grease thickener is derived from 12-hydroxystearic acid. 
   
   
       30 . The lubricating composition of  claim 27 , wherein the grease thickener is derived an overbased calcium sulphonate. 
   
   
       31 . The lubricating composition of  claim 27 , wherein the grease thickener is derived from a diurea thickener, a polyurea thickener, or a polyurea complex thickener or admixtures of them. 
   
   
       32 . The lubricating composition of  claim 1 , wherein the sulphur-free amine salt is derived from a primary amine, a secondary amine, a tertiary amine, or mixtures thereof,
 wherein the primary amine is selected from the group consisting of ethylamine, propylamine, butylamine, 2-ethylhexylamine, bis-2-ethylhexylamine, octylamine, and dodecylamine, n-octylamine, n-decylamine, n-dodecylamine, n-tetradecylamine, n-hexadecylamine, n-octadecylamine and oleyamine, cocoamine, tallowamine, and stearylamine,   wherein the secondary amine is selected from the group consisting of dimethylamine, diethylamine, dipropylamine, dibutylamine, diamylamine, dihexylamine, diheptylamine, methylethylamine, ethylbutylamine and ethylamylamine; and   wherein the tertiary amine is selected from the group consisting of tri-n-butylamine, tri-n-octylamine, tri-decylamine, tri-laurylamine, tri-hexadecylamine, and dimethyloleylamine.   
   
   
       33 . The lubricating composition of  claim 1 , wherein the sulphur-free amine salt is derived from a tertiary-aliphatic primary amine.