Lubricant compositions of polyalphaolefin and alkylated aromatic fluids
AssigneeMobil Oil Corporation
InventorsQuang N. Le, Joosup Shim
Life of this patent
Estimating the term…
Abstract
The inclusion of alkylated aromatic base fluids, such as alkylated naphthalene, blending stocks with polyalphaolefin base fluids provides significant performance improvements in oxidation stability, solubility, elastomer compatibility and hydrolytic stability.
Claims24
In a polyalphaolefin-based lubricant composition comprising a mixture of synthetic fluids of lubricating viscosity comprising (1) a polyalphaolefin lubricant fluid, (2) a lubricant fluid to confer solvency and elastomer compatibility, and (3) an additive package comprising corrosion inhibitors, metal passivators, dispersants, and antioxidants,
- the improvement comprising
- the use of an alkylated naphthalene as the lubricant fluid to confer solvency and elastomer compatibilty, the polyalphaolefin fluid comprising from about 95 to about 99 wt % based on the total weight of the composition, and the alkylated naphthalene from about 1 to about 5 wt % based on the total weight of the composition, the composition having improved oxidation stability and thermal solubility, elastomer compatibility and hydrolytic stability.
In a polyalphaolefin-based lubricant composition comprising a mixture of synthetic fluids of lubricating viscosity comprising (1) a polyalphaolefin lubricant fluid, (2) a lubricant fluid to confer solvency and elastomer compatibility, and (3) an additive package comprising corrosion inhibitors, metal passivators, dispersants, and antioxidants,
- the improvement comprising the use of alkylated naphthalene as the lubricant fluid to confer solvency and elastomer compatibility, the polyalphaolefin fluid comprising from about 80 to about 99 wt % based on the total weight of the composition, and the alkylated naphthalene from about 1 to about 20 wt % based on the total weight of the composition, the composition having improved oxidation stability and thermal solubility, elastomer compatibility and hydrolytic stability.
Dependencies are inferred from the claim text.