Release additive composition for oil filter system

Abstract

A slow release liquid additive concentrate for use in an engine oil filter and a method for extending an oil drain interval for an engine. The additive concentrate has therein at least one detergent and at least one antioxidant. The additive concentrate has a tan delta of greater than about 5.

1 . A slow release liquid additive concentrate for use in an engine oil filter comprising:
 at least one detergent, and   at least one antioxidant,   wherein the additive concentrate has a tan delta of greater than about 5.   
   
   
       2 . The additive concentrate of  claim 1 , wherein the detergent has a TBN ranging from about 100 to about 600. 
   
   
       3 . The additive concentrate of  claim 1 , wherein the detergent has a TBN ranging from about 200 to about 500. 
   
   
       4 . The additive concentrate of  claim 1 , wherein the concentrate has an active ingredient content of at least about 60% by weight relative to a total weight of the concentrate. 
   
   
       5 . The additive concentrate of  claim 1 , wherein the detergent is selected from the group consisting of sulfonates, phenates, salicylates, carboxylates, metal salts Mannich condensation products, and combinations thereof. 
   
   
       6 . The additive concentrate of  claim 1 , wherein the detergent is selected from the group consisting of sodium sulfonates, sodium carboxylates, sodium salicylates, sodium phenates, sulfurized sodium phenates, calcium sulfonates, calcium carboxylates, calcium salicylates, calcium phenates, sulfurized calcium phenates, lithium sulfonates, lithium carboxylates, lithium salicylates, lithium phenates, sulfurized lithium phenates, magnesium sulfonates, magnesium carboxylates, magnesium salicylates, magnesium phenates, sulfurized magnesium phenates, potassium sulfonates, potassium carboxylates, potassium salicylates, potassium phenates, sulfurized potassium phenates, and combinations thereof. 
   
   
       7 . The additive concentrate of  claim 1 , wherein the detergent is present in an amount ranging from about 60 wt. % to about 90 wt. %, relative to a total weight of the additive concentrate. 
   
   
       8 . The additive concentrate of  claim 1 , wherein the detergent is present in an amount ranging from about 70 wt. % to about 80 wt. %, relative to a total weight of the additive concentrate. 
   
   
       9 . The additive concentrate of  claim 1 , wherein the antioxidant is selected from the group consisting of alkyl-substituted phenols, phenate sulfides, phosphosulfurized terpenes, sulfurized esters, aromatic amines, hindered phenols, and combinations thereof. 
   
   
       10 . The additive concentrate of  claim 9 , wherein the hindered phenol comprises at least one functional moiety selected from the group consisting of an ester, thioester, alkyl group, amine, ketone, amide, sulfoxide and sulfone. 
   
   
       11 . The additive concentrate of  claim 9 , wherein the hindered phenol is selected from the group consisting of 2,6-di-tert-butylphenol, 4-methyl-2,6-di-tert-butyl-phenol, 4-ethyl-2,6-di-tert-butylphenol, 4-propyl-2,6-di-tert-butylphenol, 4-butyl-2,6-di-tert-butylphenol 2,6-di-tert-butylphenol, 4-pentyl-2,6-di-tert-butylphenol, 4-hexyl-2,6-di-tert-butylphenol, 4-heptyl-2,6-di-tert-butylphenol, 4-(2-ethylhexyl)-2,6-di-tert-butylphenol, 4-octyl-2,6-di-tert-butylphenol, 4-nonyl-2,6-di-tert-butylphenol, 4-decyl-2,6-di-tert-butylphenol, 4-undecyl-2,6-di-tert-butylphenol, 4-dodecyl-2,6-di-tert-butylphenol, 4-tridecyl-2,6-di-tert-butylphenol, 4-tetradecyl-2,6-di-tert-butylphenol, methylene-bridged sterically hindered phenols such as 4,4-methylenebis(6-tert-butyl-o-cresol), 4,4-methylenebis(2-tert-amyl-o-cresol), 2,2-methylenebis(4-methyl-6-tert-butylphenol), 4,4-methylene-bis(2,6-di-tertbutylphenol), and combinations thereof. 
   
   
       12 . The additive concentrate of  claim 9 , wherein the aromatic amine is selected from the group consisting of diarylamines, alky derivatives of diarylamines, and combinations thereof. 
   
   
       13 . The additive concentrate of  claim 1 , wherein the additive concentrate is substantially devoid of nitrogen-containing dispersants. 
   
   
       14 . The additive concentrate of  claim 1 , wherein the antioxidant is present in an amount ranging from about 10 wt. % to about 40 wt. %, relative to a total weight of the additive concentrate. 
   
   
       15 . The additive concentrate of  claim 1 , wherein the antioxidant is present in an amount ranging from about 15 wt. % to about 30 wt. %, relative to a total weight of the additive concentrate. 
   
   
       16 . The additive concentrate of  claim 1 , wherein the concentrate further comprises a viscosity index improver devoid of nitrogen atoms. 
   
   
       17 . The additive concentrate of  claim 1 , wherein the concentrate further comprises an oil in an amount ranging from about 5 wt. % to less than about 30 wt. % relative to a total weight of the additive concentrate. 
   
   
       18 . A method of increasing an oil drain interval in a vehicle comprising: providing to the vehicle an oil filter comprising a release additive liquid for predetermined periodic release into an engine oil, the release additive liquid including at least one detergent; and at least one antioxidant, wherein the release additive liquid has a tan delta of greater than about 5. 
   
   
       19 . The method of  claim 18 , wherein the detergent has a TBN ranging from about 100 to about 600. 
   
   
       20 . (canceled) 
   
   
       21 . The method of  claim 18 , wherein the release additive has an active ingredient content of at least about 60% by weight relative to a total weight of the additive. 
   
   
       22 . The method of  claim 18 , wherein the detergent is selected from the group consisting of sulfonates, phenates, salicylates, carboxylates, metal salts Mannich condensation products, and combinations thereof. 
   
   
       23 . (canceled) 
   
   
       24 . The method of  claim 18 , wherein the detergent is present in an amount ranging from about 60 wt. % to about 90 wt. %, relative to a total weight of the release additive. 
   
   
       25 . (canceled) 
   
   
       26 . The method of  claim 18 , wherein the antioxidant is selected from the group consisting of alkyl-substituted phenols, phenate sulfides, phosphosulfurized terpenes, sulfurized esters, aromatic amines, hindered phenols, and combinations thereof. 
   
   
       27 . (canceled) 
   
   
       28 . (canceled) 
   
   
       29 . (canceled) 
   
   
       30 . The method of  claim 18 , wherein the release additive is substantially devoid of nitrogen-containing dispersants. 
   
   
       31 . The method of  claim 18 , wherein the antioxidant is present in an amount ranging from about 10 wt. % to about 40 wt. %, relative to a total weight of the release additive. 
   
   
       32 - 34 . (canceled)