Carboxylated detergent- disperant additive for lubricating oils

Abstract

The present invention provides a novel unsulfurized, carboxylate-containing additive for lubricating oils, comprising a mixture of alkaline earth metal salts (hydrocarbyl phenate/hydrocarbyl salicylate) and a reduced amount of unreacted hydrocarbyl phenols, as well as additive packages, concentrates and finished oil compositions comprising the same. Specifically, it relates to additives comprising said mixture in which said hydrocarbyl salicylate is primarily single-aromatic-ring hydrocarbyl salicylate. The invention also provides a method for producing said additive.

1 - 41 . (canceled)  
   
   
       42 . A lubricating oil additive comprising: 
 (a) from 0 to 35% hydrocarbyl phenol;    (b) from 10 to 50% alkaline earth metal hydrocarbyl phenate;    (c) from 15 to 60% alkaline earth metal single-aromatic-ring hydrocarbyl salicylate; and    (d) from 0% to 50% organic diluent.    
   
   
       43 . A lubricating oil additive according to  claim 42  further comprising an alkaline earth double-aromatic-ring hydrocarbyl salicylate wherein the mole ratio of single-aromatic-ring hydrocarbyl salicylate to double-aromatic-ring hydrocarbyl salicylate is at least 8:1.  
   
   
       44 . A lubricating oil composition comprising: 
 (a) a major part of a base oil of lubricating viscosity,    (b) from 1% to 30% of the lubricating oil additive according to  claim 42 .    
   
   
       45 . A lubricating oil composition according to  claim 44  further comprising at least one of the following: 
 (a) an ashless dispersant    (b) an oxidation inhibitor;    (c) a rust inhibitor;    (d) a demulsifier;    (e) an extreme pressure agent;    (f) a friction modifier;    (g) a multifunctional additive;    (h) a viscosity index improver;    (i) a pour point depressant;    (j) a foam inhibitor; and    (k) a metal-containing detergent.    
   
   
       46 . A hydraulic oil composition containing a major part of base oil of lubricating viscosity and from 0.1 to 6.0% of the lubricating oil additive according to  claim 42 .  
   
   
       47 . A concentrate comprising: 
 a) from 20 to 80% of an organic diluent, and    (b) the lubricating oil additive according to  claim 42 .    
   
   
       48 . An additive package comprising the lubricating oil additive according to  claim 42  and further comprising at least one of the following: 
 (a) a metal-containing detergent    (b) an ashless dispersant    (c) an oxidation inhibitor;    (d) a rust inhibitor;    (e) a demulsifier;    (f) an extreme pressure agent;    (g) a friction modifier;    (h) a multifunctional additive;    (i) a viscosity index improver;    (j) a pour point depressant; and    (k) a foam inhibitor.    
   
   
       49 . A lubricant additive composition comprising the lubricating oil additive of  claim 42  and at least one of the following: 
 (a) a phenate;    (b) a phenate-stearate;    (c) a salicylate; and    (d) a carboxy-stearate.    
   
   
       50 . The composition of  claim 49  wherein the mass ratio of phenate to said lubricating oil additive is from 1:0.035 to 1:98.  
   
   
       51 . The composition of  claim 49  wherein the mass ratio of phenate to said lubricating oil additive is from 1:0.239 to 1:14.  
   
   
       52 . The composition of  claim 49  wherein the mass ratio of phenate to said lubricating oil additive is from 1:0.451 to 1:7.5.  
   
   
       53 . The composition of  claim 49  wherein the mass ratio of phenate-stearate to said lubricating oil additive is from 1:0.051 to 1:126.  
   
   
       54 . The composition of  claim 49  wherein the mass ratio of phenate-stearate to said lubricating oil additive is from 1:0.353 to 1:18.  
   
   
       55 . The composition of  claim 49  wherein the mass ratio of phenate-stearate to said lubricating oil additive is from 1:0.667 to 1:9.7.  
   
   
       56 . The composition of  claim 49  wherein said salicylate is a medium-overbased salicylate.  
   
   
       57 . The composition of  claim 49  wherein said salicylate is a high-overbased salicylate.  
   
   
       58 . The composition of  claim 57  wherein the mass ratio of salicylate to said lubricating oil additive is from 1:0.026 to 1:120.  
   
   
       59 . The composition of  claim 57  wherein the mass ratio of salicylate to said lubricating oil additive is from 1:0.178 to 1:17.  
   
   
       60 . The composition of  claim 57  wherein the mass ratio of salicylate to said lubricating oil additive is from 1:0.335 to 1:9.2.  
   
   
       61 . The composition of  claim 49  wherein the mass ratio of carboxy-stearate to said lubricating oil additive is from 1:0.023 to 1:105.  
   
   
       62 . The composition of  claim 49  wherein the mass ratio of carboxy-stearate to said lubricating oil additive is from 1:0.156 to 1:15.  
   
   
       63 . The composition of  claim 49  wherein the mass ratio of carboxy-stearate to said lubricating oil additive is from 1:0.294 to 1:8.1.  
   
   
       64 . A method for improving corrosion protection in an internal combustion engine, said method comprising operating an internal combustion engine with the lubricating oil composition according to  claim 44 .  
   
   
       65 . A method for improving viscosity increase control of a lubricating oil composition, said method comprising adding an effective viscosity increase controlling amount of the lubricating oil additive composition according to  claim 42  to said lubricating oil composition.  
   
   
       66 . (canceled)