US2011015104A1PendingUtilityA1

Lubricant Compositions Containing Stable Boric Acid Suspension

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Individually held — no corporate assignee on recordPriority: Jul 17, 2009Filed: Jul 17, 2009Published: Jan 20, 2011
Est. expiryJul 17, 2029(~3 yrs left)· nominal 20-yr term from priority
Inventors:William E. Olliges
C10M 169/04C10M 2207/282C10M 2203/1006C10M 2201/087C10M 2209/104C10N 2020/06C10N 2050/10
56
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Claims

Abstract

A lubricant composition including a lubricant comprising at least one of a hydrocarbon oil or grease, a surfactant, an ester of adipic acid, and a suspension of boric acid.

Claims

exact text as granted — not AI-modified
1 . A lubricant composition, comprising:
 a lubricant comprising at least one of a hydrocarbon oil or grease;   about 0.001 wt.% to about 0.5 wt .% of a surfactant comprising octylphenol ethoxylate or polyalkylene plycol ether;   an ester of adipic acid chemically-linked to the at least one lubricant; and   a suspension of particulate boric acid, wherein the boric acid has a particle size of 0.5 to 2.5 microns.   
     
     
         2 . A lubricant composition according to  claim 1 , wherein the ester of adipic acid comprises diisodecyl adipate. 
     
     
         3 . A lubricant composition according to  claim 1 , wherein the lubricant comprises at least one of a synthetic oil, a mineral oil, a silicon oil, a cutting oil, a transmission fluid, a hydraulic fluid, or a grease. 
     
     
         4 . (canceled) 
     
     
         5 . A lubricant composition according to  claim 1 , wherein the boric acid has a particle size of 0.5 to about 1 micron. 
     
     
         6 . (canceled) 
     
     
         7 . A lubricant composition according to  claim 1 , comprising 5 wt.% to about 25 wt.% boric acid based on the weight of the lubricant composition. 
     
     
         8 - 10 . (canceled) 
     
     
         11 . A lubricant composition, comprising:
 a lubricant comprising at least one of a hydrocarbon oil or grease;   about 0.001 wt.% to about 0.5 wt.% of a surfactant comprising polyalkylene glycol ether; and   a boric acid suspension comprising particulate boric acid and diisodecyl adipate chemically linked to the lubricant, wherein the boric acid has a particle size of 0.5 to 2.5 microns.   
     
     
         12 . (canceled) 
     
     
         13 . A method of making a lubricant composition comprising a stable boric acid suspension, said method comprising:
 mixing an ester of adipic acid, a surfactant comprising octylphenol ethoxylate or polyalkylene glycol ether, and boric acid having a particle size of 0.5 to 2.5 microns to form a mixture by high shear blending, wherein a temperature of the mixture does not exceed 120° F.;   adding a lubricant comprising at least one of a hydrocarbon oil or grease to the mixture;   chemically linking the ester of adipic acid to the at least one lubricant and forming a suspension of boric acid in the at least one lubricant.   
     
     
         14 . A method according to  claim 13 , further comprising dissolving an ester of adipic acid comprising diisodecyl adipate in a solvent. 
     
     
         15 - 16 . (canceled) 
     
     
         17 . A method according to  claim 13 , wherein a graft initiator and catalyst are not used in making the lubricant composition. 
     
     
         18 . A lubricant composition according to  claim 1 , wherein the ester of adipic acid comprises a monomer or prepolymer that is chemically linked to the at least one lubricant via polymer chains. 
     
     
         19 . A lubricant composition according to  claim 18 , wherein polar sites on the polymer chains form bridges between the particulate boric acid and the at least one lubricant. 
     
     
         20 . A lubricant composition according to  claim 1 , wherein the ester of adipic acid is chemically-linked to the at least one lubricant via hydrogen-carbon bonds. 
     
     
         21 . A lubricant composition according to  claim 1 , wherein the surfactant comprises octylphenol ethoxylate. 
     
     
         22 . A lubricant composition according to  claim 1 , comprising about 200,000 ppm of boric acid. 
     
     
         23 . A lubricant composition according to  claim 1 , wherein the surfactant comprises polyalkylene glycol ether. 
     
     
         24 . A lubricant composition according to  claim 1 , comprising:
 30 wt.% to 60 wt.% of at least one lubricant comprising a hydrocarbon oil or grease, based on the total weight of the lubricant composition;   5 wt.% to 50 wt.% of diisodecyl adipate chemically-linked to the at least one lubricant; and   5 wt.% to 25 wt.% of particulate boric acid, suspended in the at least one lubricant.   
     
     
         25 . A lubricant composition according to  claim 1 , comprising 20 wt.% to about 25 wt.% of particulate boric acid, suspended in the at least one lubricant. 
     
     
         26 . A lubricant composition according to  claim 1 , wherein the lubricant comprises a silicon oil. 
     
     
         27 . A lubricant composition according to  claim 1 , wherein the lubricant comprises a hydraulic fluid.

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