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US 10,119,092 B2Granted
Use of polyesters as lubricants
AssigneeBASF SE
InventorsMarkus Scherer, Boris Breitscheidel
Life of this patent
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Abstract
The presently claimed invention is directed to the novel use of polyester obtainable by reacting a mixture comprising adipic acid and an alcohol mixture comprising 1-nonanol, monomethyloctanols, dimethylheptanols and monoethylheptanols as lubricants and a lubricant composition comprising these polyesters.
Claims15
A lubricant composition comprising:
- A) at least one lubricating base oil which is a poly-α-olefin (PAO) in an amount from 30 to 90% by weight,
- B) at least one polyester in an amount from 3.5 to 45% by weight and obtainable by reacting adipic acid and an alcohol mixture comprising 1-nonanol, monomethyloctanols, dimethylheptanols and monoethylheptanols having a viscosity at 40° C. in the range of 8 to 12 mm2/s determined according to DIN 51562-1 and
- C) one or more lubricating oil additives in an amount from 0.1 to 40% by weight wherein the lubricant composition has a cloud point of less than −80° C.
A lubricant composition comprising:
- A) at least one lubricating base oil which is a poly-α-olefin (PAO),
- B) at least one polyester obtainable by reacting adipic acid and an alcohol mixture comprising 1-nonanol, monomethyloctanols, dimethylheptanols and monoethylheptanols wherein the at least one polyester has a viscosity at 40° C. in the range of 8 to 12 mm2/s determined according to DIN 51562-1, a viscosity index above 140, a density at 20° C. according to DIN 51757 of from 0.90 to 0.94 g/cm3 and a refractive index nD20 according to DIN 51423 is from 1.440 to 1.460 and the alcohol mixture contains a proportion of 6% by weight to 16% by weight 1-nonanol, 25% by weight to 55% by weight monomethyloctanols, 10% by weight to 30% by weight dimethylheptanols and 7% by weight to 15% by weight monoethylheptanols, based on the overall weight of the alcohol mixture,
- C) one or more lubricating oil additives are selected from the group consisting of lubricity improvers, viscosity improvers, combustion improvers, corrosion and/or oxidation inhibiting agents, pour point depressing agents, extreme pressure agents, antiwear agents, antifoam agents, detergents, dispersants, antioxidants and metal passivators, and
- wherein the lubricant composition comprises 50% by weight to 90% by weight of component A), 3.5 to 45% by weight of component B) and 0.1% by weight to 40% by weight of component C) and wherein the lubricant composition has a cloud point of less than −80° C.
1 more element
Dependencies are inferred from the claim text.