# US 10,119,092 B2 · Use of polyesters as lubricants > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,119,092 B2 - Document ID: US10119092B2 - Status: Granted - Kind: B2 - Application number: 14/443,742 - Filed: 2013-11-08 - Published: 2015-10-22 - Granted: 2018-11-06 - Earliest claimed: 2012-11-19 - Assignees: BASF SE - Applicants: BASF SE - Inventors: Markus Scherer; Boris Breitscheidel - Web page: https://patentgrep.com/patent/US10119092B2 ## CPC - C10M 165/00: Lubricating compositions characterised by the additive being a mixture of a macromolecular compound and a compound of unknown or incompletely defined constitution, each of these compounds being essential - C10M 105/36: of polycarboxylic acids - C10M 129/72: of polycarboxylic acids - C10M 2205/026: Butene - C10M 2205/0285: used as base material - C10M 2207/282: of (cyclo)aliphatic oolycarboxylic acids - C10M 2207/2825: used as base material - C10N 2020/02: Viscosity; Viscosity index - C10N 2030/02: Pour-point; Viscosity index - C10N 2030/36: {Seal compatibility, e.g. with rubber} - C10M: LUBRICATING COMPOSITIONS (well drilling compositions C09K8/02); USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION (mould release, i.e. separating, agents for metals B22C3/00, for plastics or substances in a plastic state, in general B29C33/56, for glass C03B40/02; textile lubricating compositions D06M11/00, D06M13/00, D06M15/00; immersion oils for microscopy G02B21/33) - C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS ## 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. ## Claims ### Claim 1 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. ### Claim 2 (depends on 1) The lubricant composition according claim 1, wherein the alcohol mixture contains a proportion of 25% by weight to 55% by weight monomethyloctanols, based on the overall weight of the alcohol mixture. ### Claim 3 (depends on 1) The lubricant composition according to claim 1, wherein the alcohol mixture contains a proportion of 10% by weight to 30% by weight dimethylheptanols, based on the overall weight of the alcohol mixture. ### Claim 4 (depends on 1) The lubricant composition according to claim 1, wherein 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. ### Claim 5 (depends on 1) The lubricant composition according to claim 1, wherein the 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. ### Claim 6 (depends on 3) The lubricant composition according claim 3, wherein the alcohol mixture contains a proportion of 25% by weight to 55% by weight monomethyloctanols, based on the overall weight of the alcohol mixture. ### Claim 7 (depends on 5) The lubricant composition according claim 5, wherein the alcohol mixture contains a proportion of 25% by weight to 55% by weight monomethyloctanols, based on the overall weight of the alcohol mixture. ### Claim 8 (depends on 5) The lubricant composition according to claim 5, wherein 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. ### Claim 9 (depends on 1) The lubricant composition according to claim 1, wherein the polyester has a viscosity index above 140. ### Claim 10 (depends on 1) The lubricant composition according to claim 1, consisting essentially of components a, b and c wherein the lubricating oil additives are selected from the group consisting of lubricity improvers, viscosity improvers, combustion improvers, corrosion inhibiting agents, oxidation inhibiting agents, corrosion and oxidation inhibiting agents, styrene-based polymers, crosslinked alkyl phenols, alkyl naphthalenes, extreme pressure agents, antiwear agents, antifoam agents, detergents, dispersants, antioxidants and metal passivators. ### Claim 11 (depends on 1) The lubricant composition according to claim 1, wherein the lubricant composition comprises 60% by weight to 90% by weight of component A), 10% by weight to 25% by weight of component B) and 2.0% by weight to 20% by weight of component C). ### Claim 12 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. ### Claim 13 (depends on 12) The lubricant composition according to claim 12, wherein the lubricant composition comprises 60% by weight to 90% by weight of component A), 10% by weight to 25% by weight of component B) and 3.5% by weight to 20% by weight of component C). ### Claim 14 (depends on 13) The lubricant composition according to claim 13, wherein the polyester is derived from a mixture which consists essentially of 11.0% 1-nonanol 20.8% 6-methyl-1-octanol 20.5% 4-methyl-1-octanol 5.3% 2-methyl-1-octanol 11.0% 2,5-dimethyl-1-heptanol 8.7% 3-ethyl-1-heptanol 6.2% 4,5-dimethyl-1-heptanol 2.9% 2-ethyl-1-heptanol 2.8% 2,3-dimethyl-1-heptanol 3.0% 2-ethyl-4-methyl-1-hexanol 2.7% 2-propyl-1-hexanol and 1.6% 3-ethyl-4-methyl-1-hexanol. ### Claim 15 (depends on 12) The lubricant composition according to claim 12, wherein the viscosity of the lubricant composition at 40° C. is from 80 to 120 mm2/s determined according to DIN 51562-1.