# US 8,569,216 B2 · Lubricant formulation with high oxidation performance > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,569,216 B2 - Document ID: US8569216B2 - Status: Granted - Kind: B2 - Application number: 13/161,906 - Filed: 2011-06-16 - Published: 2012-12-20 - Granted: 2013-10-29 - Earliest claimed: 2011-06-16 - Assignees: ExxonMobil Research and Engineering Company - Applicants: David A. Blain; Liehpao Oscar Farng; Eugenio Sanchez; Michael R. Douglass; Angela S. Galiano-Roth; James T. Carey - Inventors: David A. Blain; Liehpao Oscar Farng; Eugenio Sanchez; Michael R. Douglass; Angela S. Galiano-Roth; James T. Carey - Web page: https://patentgrep.com/patent/US8569216B2 ## CPC - C10M 169/04: Mixtures of base-materials and additives - C10M 2205/0285: used as base material - C10M 2205/223: used as base material - C10M 2207/026: with tertiary alkyl groups - C10M 2207/288: containing free carboxyl groups - C10M 2215/064: Di- and triaryl amines - C10M 2215/065: Phenyl-Naphthyl amines - C10M 2219/066: Thiocarbamic type compounds - C10M 2219/085: containing carboxyl groups; Derivatives thereof - C10M 2219/087: containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols - C10M 2219/108: Phenothiazine - C10M 2223/041: Triaryl phosphates - C10M 2223/043: Ammonium or amine salts thereof - C10M 2223/047: Thioderivatives not containing metallic elements - C10N 2020/02: Viscosity; Viscosity index - C10N 2020/04: Molecular weight; Molecular weight distribution - C10N 2030/02: Pour-point; Viscosity index - C10N 2030/10: Inhibition of oxidation, e.g. anti-oxidants - C10N 2030/40: {Low content or no content compositions} - C10N 2040/25: Internal-combustion engines - 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 A Group IV/Group V lubricating composition providing improved antioxidation performance comprises from 5 wt. % to 40 wt. % of a Group V base oil component, such as alkylated naphthalene, at least 30 wt. % of a Group IV base oil component, such as one or more polyalphaolefin base stocks, and from 0.25 wt. % to 1.5 wt. % of a trithiophosphate-containing compound. The trithiophosphate-containing compound is preferably C30H57O7PS3. The lubricating composition includes not greater than 5 wt. % of a Group I, Group II, or Group III base oil component, and, preferably not greater than 10 ppm heavy metal component. The lubricating composition preferably has a kinematic viscosity of from 20 cSt to 1,000 cSt at 40° C. and a viscosity index (VI) of from 130 to 200. ## Claims ### Claim 1 A lubricating composition comprising in admixture: from 15 wt. % to 25 wt. % of a Group V base oil component, based on the total weight of the blend components that are used to produce the lubricating composition, wherein the Group V base oil component is alkylated naphthalene, from 65 wt. % to 85 wt. % of a Group IV base oil component, based on the total weight of the blend components that are used to produce the lubricating composition, wherein the Group IV base oil component is one or more polyalphaolefin base stocks, from 0.25 wt. % to 1.5 wt. % of a trithiophosphate-containing compound, based on the total weight of the blend components that are used to produce the lubricating composition, wherein the trithiophosphate-containing compound is S,S,S-Tris-carbo-2-isooctyloxy-methyl trithiophosphate, from 0.25 wt. % to 1.5 wt. % of alkylated diphenyl amine, based on the total weight of the blend components that are used to produce the lubricating composition, and not greater than 5 wt. % of a Group I, Group II, or Group III base oil component, based on the total weight of the blend components that are used to produce the lubricating composition, and wherein the 210 hour oxidation stability test of the lubricating composition yields a value greater than 210 hours. ### Claim 2 (depends on 1) The lubricating composition of claim 1, wherein the trithiophosphate-containing compound has a Mw of 600 g/mol to 700 g/mol. ### Claim 3 (depends on 1) The lubricating composition of claim 1 including not greater than 1 wt. % of the trithiophosphate-containing compound, based on the total weight of the blend components that are used to produce the lubricating composition. ### Claim 4 (depends on 1) The lubricating composition of claim 1 including not greater than 1 wt. % of the trithiophosphate-containing compound and not greater than 1 wt. % of the alkylated diphenyl amine, based on the total weight of the blend components that are used to produce the lubricating composition. ### Claim 5 (depends on 1) The lubricating composition of claim 1, wherein the lubricating composition comprises not greater than 10 parts per million (ppm) of a heavy metal component, based on the total weight of the blend components that are used to produce the lubricating composition. ### Claim 6 (depends on 1) The lubricating composition of claim 1, wherein the lubricating composition comprises a total of at least 80 wt. % of the combined Group V base oil component and the Group IV base oil component, based on the total weight of the blend components that are used to produce the lubricating composition. ### Claim 7 (depends on 1) The lubricating composition of claim 1 wherein the Group IV base oil component has a kinematic viscosity of from 2 cSt to 2000 cSt at 40° C. ### Claim 8 (depends on 1) The lubricating composition of claim 1 wherein the blended lubricating composition has a kinematic viscosity of from 20 cSt to 1,000 cSt at 40° C. ### Claim 9 (depends on 1) The lubricating composition of claim 1 wherein the blended lubricating composition has a viscosity index (VI) of from 130 to 200. ### Claim 10 (depends on 1) The lubricating composition of claim 1 wherein the blended lubricating composition has an ISO VG grade of from 22 to 1000. ### Claim 11 A method of producing a lubricating composition, comprising blending together at least the following components: from 15 wt. % to 25 wt. % of a Group V base oil component, based on the total weight of the blend components that are used to produce the lubricating composition, wherein the Group V base oil component is alkylated naphthalene, from 65 wt. % to 85 wt. % of a Group IV base oil component, based on the total weight of the blend components that are used to produce the lubricating composition, wherein the Group IV base oil component is one or more polyalphaolefin base stocks, from 0.25 wt. % to 1.5 wt. % of a trithiophosphate-containing compound, based on the total weight of the blend components that are used to produce the lubricating composition, wherein the trithiophosphate-containing compound is S,S,S-Tris-carbo-2-isooctyloxy-methyl trithiophosphate, from 0.25 wt. % to 1.5 wt. % of alkylated diphenyl amine, based on the total weight of the blend components that are used to produce the lubricating composition, and not greater than 5 wt. % of a Group I, Group II, or Group III base oil component, based on the total weight of the blend components that are used to produce the lubricating composition, and wherein the 210 hour oxidation stability test of the lubricating composition yields a value greater than 210 hours. ### Claim 12 A method of improving the antioxidation performance of a lubricating composition comprising in admixture from 15 wt. % to 25 wt. % of a Group V base oil component, based on the total weight of the blend components that are used to produce the lubricating composition, wherein the Group V base oil component is alkylated naphthalene, and from 65 wt. % to 85 wt. % of a Group IV base oil component, based on the total weight of the blend components that are used to produce the lubricating composition, wherein the Group IV base oil component is one or more polyalphaolefin base stocks, the method comprising the step of: adding to the lubricating composition from 0.25 wt. % to 1.5 wt. % of a trithiophosphate-containing compound, based on the total weight of the blend components that are used to produce the lubricating composition, wherein the trithiophosphate-containing compound is S,S,S-Tris-carbo-2-isooctyloxy-methyl trithiophosphate, adding to the lubricating composition from 0.25 wt. % to 1.5 wt. % of a alkylated diphenyl amine, based on the total weight of the blend components that are used to produce the lubricating composition, wherein the lubricating composition contains not greater than 5 wt. % of a Group I, Group II, or Group III base oil component, based on the total weight of the blend components that are used to produce the lubricating composition, and wherein the 210 hour oxidation stability test of the lubricating composition yields a value greater than 210 hours.