Finished lubricant with improved rust inhibition
A finished lubricant having a kinematic viscosity at 40° C. between about 90 and 1700 cSt that passes the TORT B rust test, comprising a highly paraffinic base oil and a solubility improver having an aniline point less than 50° C. A finished lubricant that passes the TORT B rust test, comprising a Fischer-Tropsch wax, oligomerized olefins, or mixture thereof; and a solubility improver. A process for making a lubricant, comprising blending together: a) a mixture of amine phosphates, b) an alkenyl succinic compound, and c) a highly paraffinic lubricating base oil.
1. A finished lubricant having a kinematic viscosity at 40° C. between about 414 cSt and 1700 cSt that passes the 4 hour TORT B rust test, comprising:
a) greater than 65 weight percent API Group III base oil, API Group IV base oil, polyinternal olefin base oil, or mixtures thereof; and
b) between about 0.10 wt % and about 5 wt % solubility improver having an aniline point less than 50° C.
2. A finished lubricant having a kinematic viscosity at 40° C. between about 90 cSt and 1700 cSt that passes the 4 hour TORT B rust test, comprising:
a) greater than 65 weight percent API Group III base oil, API Group IV base oil, polyinternal olefin base oil, or mixtures thereof; and
b) between about 0.10 wt % and about 5 wt % solubility improver having an aniline point less than 2° C.
3. A finished lubricant having a kinematic viscosity at 40° C. between about 90 cSt and 1700 cSt that passes the 4 hour TORT B rust test, comprising:
a) greater than 65 weight percent API Group III base oil, API Group IV base oil, polyinternal olefin base oil, or mixtures thereof;
b) between about 0.10 wt % and about 5 wt % solubility improver having an aniline point less than 50° C.; and
c) a mixture of amine phosphates, wherein the mixture of amine phosphates is a mixture of mono and diacid amine phosphate salts.
4. A finished lubricant having a kinematic viscosity at 40° C. between about 90 cSt and 1700 cSt that passes the 4 hour TORT B rust test, comprising:
a) greater than 65 weight percent API Group III base oil, API Group IV base oil, polyinternal olefin base oil, or mixtures thereof; and
b) between about 010 wt % and about 5 wt % solubility improver having an aniline point less than 50° C.; wherein the finished lubricant meets the requirements of the MIL-PRF-17331J specification.
5. The finished lubricant of claim 2 , claim 2 , or claim 4 , wherein said kinematic viscosity at 40° C. is between about 198 and 1700 cSt.
6. The finished lubricant of claim 1 , claim 2 , claim 3 , or claim 4 , comprising greater than 90 weight percent API Group III base oil, API Group IV base oil, polyinternal olefin base oil, or mixtures thereof.
7. The finished lubricant of claim 1 , claim 2 , claim 3 , or claim 4 , having an absolute value of the copper weight change by ASTM D 2619-95 less than or equal to 0.10 milligrams per square centimeter.
8. The finished lubricant of claim 1 , claim 2 , claim 3 , or claim 4 , having an ASTM color by ASTM D 1500-98 of 1.0 or less.
9. The finished lubricant of claim 1 , claim 3 , or claim 4 , wherein the solubility improver has an aniline point less than 20° C.
10. The finished lubricant of claim 1 , claim 2 , or claim 4 , additionally comprising a mixture of amine phosphates.
11. The finished lubricant of claim 1 , claim 2 , claim 3 , or claim 4 , additionally comprising an alkenyl succinic acid half ester in a solution having a kinematic viscosity at 40° C. greater than 1000 cSt.