High temperature lubricant composition
Disclosed is a high temperature lubricant composition containing from about 85 to about 98 wt. % of a neopolyol ester; (2); from about 2 to about 10 wt. % boron nitride powder, and (3) from about 0.1 to about 5 wt. % of a linker/surfactant based on the combined weight of (1), (2) and (3).
1. A lubricant composition, comprising:
about 85 to about 98 wt. % of pentaerythritol tetraoleate;
about 2 to about 10 wt. % of boron nitride powder having a mean particle size of about 6 microns; and
about 0.1 to about 1 wt. % of a linker/surfactant comprising a fatty acid ester.
2. The lubricant composition of claim 1 , further comprising an antioxidant selected from the group consisting of phenate sulfides, phosphosulfurized terpenes, and sulfurized esters.
3. The lubricant composition of claim 1 , further comprising a metal inactivator.
4. The lubricant composition of claim 1 , further comprising an anti-wear agent selected from the group consisting of zinc oxide, borax, ammonium molybdate, calcium carbonate, and mixtures thereof.
5. The lubricant composition of claim 1 , further comprising an extreme pressure agent selected from the group consisting of graphite, triphenyl phosphorothionate, dithio-carbonates, tungsten disulfide, and mixtures thereof.
6. The lubricant composition of claim 1 , comprising about 0.25 wt. % of a linker/surfactant.