Method to minimize conductive deposits
The disclosed technology relates to a method of minimizing electrically conductive deposits in an electrically conducting apparatus by lubricating the apparatus with a lubricant containing a borate ester.
1 . A method of minimizing electrically conductive deposits in an electrically conducting apparatus comprising applying to said apparatus a lubricant comprising an oil of lubricating viscosity and from 0.2 to 1.1 wt. % borate ester and 0.6 to 1 percent by weight of a thiadiazole compound, and applying an electric current to the apparatus.
2 . The method of claim 1 , maintaining a wear rating according to ASTM D5182 at 150C of greater than 10.
3 . The method of claim 1 wherein the borate ester comprises formula (I)
wherein each R individually is 4 to 18 carbon atoms.
4 . The method of claim 1 wherein the borate ester comprises formula (II)
wherein each R individually is 4 to 18 carbon atoms.
5 . The method of claim 1 wherein the borate ester comprises formula (III)
wherein each R individually is 4 to 18 carbon atoms.
6 . The method of claim 1 wherein the borate ester comprises formula (IV)
wherein each R individually is 4 to 18 carbon atoms.
7 . The method of claim 1 wherein the borate ester comprises formula (V)
wherein each R individually is 4 to 18 carbon atoms.
8 . The method of claim 1 wherein the borate ester comprises formula (VI)
wherein each R individually is 4 to 18 carbon atoms.
9 . The method of claim 1 wherein the borate ester comprises tripropyl borate.
10 . The method of claim 1 wherein the borate ester comprises tributyl borate.
11 . The method of claim 1 wherein the borate ester comprises tripentyl borate.
12 . The method of claim 1 wherein the borate ester comprises trihexyl borate.
13 . The method of claim 1 wherein the borate ester comprises triheptyl borate.
14 . The method of claim 1 wherein the borate ester comprises trioctyl borate.
15 . The method of claim 1 wherein the borate ester comprises trinonyl borate.
16 . The method of claim 1 wherein the borate ester comprises tridecyl borate.
17 . The method of claim 1 wherein the borate ester comprises tri-2-ethylhexyl borate.
18 . The method of claim 1 wherein the borate ester is present in the lubricant at 0.25 to 1.1 percent by weight.