Amine terminated and hydroxyl terminated polyether dispersants

Abstract

The disclosed technology relates to a dispersant composition comprising the reaction product of a polyolefin acylating agent and an amine terminated or hydroxyl terminated polyether. In addition, the technology relates to lubricating compositions containing the dispersant composition and an optional synergistic amount of another dispersant, as well as methods of employing the dispersant composition in an engine and engine oils.

1 - 22 . (canceled) 
     
     
         23 . A lubricant composition comprised of:
 a dispersant composition comprising:
 the reaction product of a polyolefin acylating agent and an amine terminated polyether, wherein the amine terminated polyether comprises a polyoxyalkylene amine or mixtures thereof, or some combination of a polyoxyalkylene amine, or mixtures thereof, with polyethylene glycol, polypropylene glycol, or mixtures thereof, and 
 a PIB succinimide, and 
   an oil of lubricating viscosity.   
     
     
         24 . The lubricant composition of  claim 23  wherein the amine terminated polyether comprises a mixture of one or more amine terminated glycols containing units derived from ethylene oxides, propylene oxides, butylene oxides or some combination thereof 
     
     
         25 . The lubricant composition of  claim 23  wherein the polyolefin acylating agent is the reaction product of a polyolefin selected from polyisobutylene or an olefin-copolymer with a carboxylic acid selected from monoethylenically unsaturated C 3 -C 28  monocarboxylic acid or ester thereof, or monoethylenically unsaturated C 4 -C 28  dicarboxylic acid, anhydride or ester thereof 
     
     
         26 . The lubricant composition of  claim 25  wherein the polyolefin acylating agent reaction is not free-radically initiated. 
     
     
         27 . The lubricant composition of  claim 25  wherein the carboxylic acid is maleic acid, itaconic acid, fumaric acid, and anhydrides or esters thereof. 
     
     
         28 . The lubricant composition of  claim 25 , wherein the polyolefin has a number average molecular weight of between about 1000 and 15,000. 
     
     
         29 . the lubricant composition of  claim 23 , wherein the polyether of the amine terminated polyether has a number average molecular weight of between about 100 and 1500. 
     
     
         30 . The lubricant composition of  claim 23 , wherein the amine terminated polyether has a number average molecular weight of between about 600 and 1200 and comprises units derived from Formula I: 
       
         
           
           
               
               
           
         
       
       wherein R 3  is methyl or CH 2 CH(CH 3 )NH 2 , R 4  is H or methyl, R 5  is methylene, Y is NH 2 , and m is between 3 and 22. 
     
     
         31 . The lubricant composition of  claim 23  wherein the dispersant composition further comprises a polyethylene polyamine.