Lubricant Composition
AssigneeBASF SE
InventorsMichael D. Hoey, David Chasan, Jeffrey Schoonmaker, Ryan Fenton
Life of this patent
Estimating the term…
Abstract
Lubricant compositions comprising a base oil, one or more antioxidants selected from a group consisting of N-α-naphthyl-N-phenylamine antioxidants and diphenylamine antioxidants; and one or more sulfur-containing additives exhibit outstanding oxidative stability and non-corrosion properties. The N-α-naphthyl-N-phenylamine antioxidants plus diphenylamine antioxidants in total may be present from about 0.2 wt % to about 0.8 wt %, based on the total weight of the lubricant composition. The sulfur provided by the sulfur-containing additives, in total, may be present from about 50 ppm to about 1000 ppm by weight, based on the total weight of the lubricant composition.
Claims24
A lubricant composition comprising
- a base oil,
- one or more antioxidants selected from a group consisting of N-a-naphthyl-N-phenylamine antioxidants and diphenylamine antioxidants;
- and
- one or more sulfur-containing additives.
The lubricant composition according to claim, comprising one or more sulfur-containing additives selected from a group consisting of sulfurized olefins, sulfurized vegetable oils, dialkyldithiophosphate esters, zinc dialkyldithiophosphates, alkyl or aryl di- or tri-sulfides, derivatives of 2,5-dimercapto-1,3,4-thiadiazole, ethyl(bisisopropyloxyphosphinothioyl)-thiopropionate, triphenyl thiophosphate, tris(alkylphenyl) phosphorothioates, diphenylmonononylphenyl phosphorothioate, isobutylphenyl diphenyl phosphorothioate, a dodecyl amine salt of 3-hydroxy-1,3-thiaphosphetan 3-oxide, trithiophosphoric acid 5,5,5-tris-isooctyl 2-acetate, derivatives of 2-mercaptobenzothiazole, ethoxycarbonyl 5-octyldithiocarbamate and dihydrocarbyl dithiophosphate metal salts.
15-19. (canceled)
(canceled)
The lubricant composition according to claim, wherein the composition is substantially free of zinc dialkyldithiophosphates.
An additive package comprising
- a) one or more N-α-naphthyl-N-phenylamine antioxidants and/or
- b) one or more diphenylamine antioxidants;
- and
- c) one or more sulfur-containing additives.
(canceled)
A process for preparing a lubricant composition, the process comprising incorporating
- one or more antioxidants selected from a group consisting of N-α-naphthyl-N-phenylamine antioxidants and diphenylamine antioxidants;
- and
- one or more sulfur-containing additives;
- into a base oil.
28-30. (canceled)
Dependencies are inferred from the claim text.