Lubricating oil additive concentrates

Abstract

Lubricant additive concentrates containing an admixture of at least one basic metal complex and at least one surface active agent having at least one hydroxyl or amino group, in which the metal basic metal complex is preblended with a polyalkenyl acylating agent prior to admixture with the surface active agent.

1 . A lubricating oil additive concentrate comprising oil of lubricating viscosity, a basic metal complex, a polyalkenyl acylating agent, and a surface active agent containing at least one hydroxyl or amino group, wherein said basic metal complex is premixed with said polyalkenyl acylating agent prior to incorporation into said concentrate.  
   
   
       2 . A concentrate, as claimed in  claim 1 , wherein said basic metal complex is an overbased metal detergent.  
   
   
       3 . A concentrate, as claimed in  claim 2 , wherein said overbased metal detergent is selected from the group consisting of overbased calcium sulfonates, overbased magnesium sulfonates, overbased calcium phenates, overbased magnesium phenates, overbased calcium carboxylates, overbased magnesium carboxylates, overbased calcium hybrid detergents containing surfactant systems comprising at least two of sulfonate, phenate and carboxylate surfactant, overbased magnesium hybrid detergents containing surfactant systems comprising at least two of sulfonate, phenate and carboxylate surfactant, and mixtures thereof.  
   
   
       4 . A concentrate, as claimed in  claim 2 , wherein said overbased metal detergent is an overbased calcium detergent.  
   
   
       5 . A concentrate, as claimed in  claim 2 , wherein said overbased metal detergent is an overbased metal sulfonate detergent, or an overbased metal hybrid detergent containing a surfactant system comprising sulfonate surfactant and at least one other surfactants.  
   
   
       6 . A concentrate, as claimed in  claim 2 , wherein said overbased metal detergent is an overbased calcium sulfonate detergent, or an overbased calcium hybrid detergent containing a surfactant system comprising sulfonate surfactant and at least one other surfactants.  
   
   
       7 . A concentrate, as claimed in  claim 1 , wherein said polyalkenyl acylating agent is a polyalkenyl substituted mono- or dicarboxylic acid or anhydride producing material.  
   
   
       8 . A concentrate, as claimed in  claim 7 , wherein said polyalkenyl substituted mono- or dicarboxylic acid or anhydride producing material is polyisobutenyl succinic anhydride.  
   
   
       9 . A concentrate, as claimed in  claim 8 , wherein said polyisobutenyl succinic anhydride is derived from polyisobutene having a number average molecular weight of from about 100 to about 4000.  
   
   
       10 . A concentrate, as claimed in  claim 1 , wherein said surface active agent is selected from the group consisting of glycerol esters of higher fatty acids; esters of long chain polycarboxylic acids with diols; oxazoline compounds; alkoxylated alkyl-substituted mono-amines, diamines and alkyl ether amines; and mixtures thereof.  
   
   
       11 . A concentrate, as claimed in  claim 10 , wherein said surface active agent is selected from the group consisting of glycerol oleates; ethoxylated amines; and mixtures thereof.  
   
   
       12 . A concentrate, as claimed in  claim 11 , wherein said surface active agent is selected from the group consisting of glycerol mono oleate; ethoxylated tallow amine; and mixtures thereof.  
   
   
       13 . A concentrate, as claimed in  claim 1 , wherein said basic metal complex and said polyalkenyl acylating agent are premixed in a weight ratio (basic metal complex to polyalkenyl acylating agent) of from about 30:1 to about 1:30.  
   
   
       14 . A concentrate, as claimed in  claim 1 , wherein said basic metal complex and said polyalkenyl acylating agent are premixed at a temperature of from about 20° C. to about 250° C., for from about 0.25 to 24 hours.  
   
   
       15 . A concentrate, as claimed in  claim 1 , containing from about 3 wt. % to about 45 wt. % of the premixed basic metal complex and polyalkenyl acylating agent; and from about 0.5 wt. % to about 20 wt. % of said surface active agent containing at least one hydroxyl or amino group; and no more than 90 wt. % oil of lubricating viscosity; all wt. % being based on the total weight of said concentrate.  
   
   
       16 . A concentrate, as claimed in  claim 15 , further comprising at least one other additive selected from the group consisting of dispersant, antioxidants and antiwear agents.  
   
   
       17 . A concentrate, as claimed in  claim 16 , further comprising at least one other component selected from the group consisting of neutral and overbased metal detergents which have not been premixed with a polyalkenyl acylating agent; and polyalkenyl acylating agent which has not been premixed with overbased metal detergent.  
   
   
       18 . A lubricating oil additive concentrate comprising: 
 oil of lubricating viscosity;    a premix of an overbased metal detergent selected from the group consisting of overbased calcium sulfonate detergent; overbased calcium hybrid detergent containing a surfactant system comprising sulfonate surfactant and at least one other surfactants; and mixtures thereof; and polyisobutenyl succinic anhydride; and    a surface active agent selected from the group consisting of glycerol oleates; ethoxylated amines.    
   
   
       19 . A concentrate as claimed in  claim 18 , wherein said overbased metal detergent and said polyisobutenyl succinic anhydride are premixed in a weight ratio (overbased metal detergent and said polyisobutenyl succinic anhydride) of from about 10:1 to about 4:1.  
   
   
       20 . A concentrate, as claimed in  claim 19 , wherein said overbased metal detergent and said polyisobutenyl succinic anhydride are premixed at a temperature of from about 50° C. to about 150° C., for from about 1 to 10 hours.  
   
   
       21 . A concentrate, as claimed in  claim 18 , containing from about 5 wt. % to about 30 wt. % of the premixed overbased metal detergent and polyisobutenyl succinic anhydride; and from about 3 wt. % to about 10 wt. % of said surface active agent; and no more than 90 wt. % oil of lubricating viscosity; all wt. % being based on the total weight of said concentrate.  
   
   
       22 . A concentrate, as claimed in  claim 18 , further comprising at least one other additive selected from the group consisting of dispersant, antioxidants and antiwear agents.  
   
   
       23 . A concentrate, as claimed in  claim 18 , further comprising at least one other component selected from the group consisting of neutral and overbased metal detergents which have not been premixed with a polyalkenyl acylating agent; and polyalkenyl acylating agent which has not been premixed with overbased metal detergent.  
   
   
       24 . A method of forming a stable additive concentrate comprising at least 0.5 wt. % of a surface active agent selected from the group consisting of glycerol oleates; ethoxylated amines and mixtures thereof and at least 3.0 wt. % of an overbased metal detergent, and no more than 90 wt. % of oil of lubricating viscosity which method comprises premixing said overbased metal detergent with a polyalkenyl acylating agent in a weight ratio (overbased metal detergent to polyalkenyl acylating agent) of from about 30:1 to about 1:30, to provide a premix; and admixing at least said premix, said surface active agent and said oil of lubricating viscosity, wherein all wt. % being based on the total weight of said concentrate.