# US 2018/0023017 A1 · Shear-Stable Oil Compositions and Processes for Making the Same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0023017 A1 - Document ID: US20180023017A1 - Status: Published application - Kind: A1 - Application number: 15/425,211 - Filed: 2017-02-06 - Published: 2018-01-25 - Earliest claimed: 2016-07-20 - Assignees: ExxonMobil Chemical Patents Inc. - Applicants: ExxonMobil Chemical Patents Inc. - Inventors: Wenning W. Han; Bernie J. Pafford - Web page: https://patentgrep.com/patent/US20180023017A1 ## CPC - C10M 105/36: of polycarboxylic acids - C10M 105/04: aliphatic - C10M 105/06: aromatic - C10M 107/10: containing aliphatic monomer having more than 4 carbon atoms - C10M 111/04: at least one of them being a macromolecular organic compound - C10M 171/00: Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated (chemically defined ingredients C10M101/00 - C10M169/00; petroleum fractions C10M101/02, C10M121/02, C10M159/04) - C10M 171/04: Specified molecular weight or molecular weight distribution - C10M 2203/024: unsaturated - C10M 2203/065: used as base material - C10M 2205/0285: used as base material - C10M 2207/2825: used as base material - C10M 2207/2835: used as base material - C10M 2207/2855: used as base material - C10N 2030/02: Pour-point; Viscosity index - C10N 2030/68: {Shear stability} - C10N 2040/04: Oil-bath; Gear-boxes; Automatic transmissions; Traction drives - 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 An oil composition comprising a first component having pendant groups and a second component but free of a third component and process for making such oil composition, where a single molecule of the third component can form large shearable stable complex structure with two molecules of the first component via van der Waals force between pendant groups and the terminal carbon chains, and a single molecule of the second component is capable of adjoining no more than one molecule of the first type. The oil composition has high shear stability making it suitable for use in lubricants subject to repeated high shear stress events. ## Claims ### Claim 1 An oil composition comprising a first component and a second component differing from the first component and free of a third component, wherein: the first component is a base stock comprising multiple molecules of a first type each having multiple pendant groups, where (i) the average pendant group length of the longest 5%, by mole, of the pendant groups of all of the molecules of the first type have an average pendant group length of Lpg(5%), where Lpg(5%)≧5.0; and (ii) a portion of the molecules of the first type have molecular weight greater than or equal to 20,000; the second component comprises multiple molecules of a second type each of which individually is capable of adjoining no more than one molecule of the first type via van der Waals force between straight carbon chains to form a stable first complex structure; and the third component comprises molecules of a third type each comprising two terminal carbon chains, where (i) the number average molecular weight of the third component is no greater than 2,000; and (ii) the two terminal carbon chains have chain lengths equal to or greater than 5.0 and do not share a common carbon atom. ### Claim 2 (depends on 1) The oil composition of claim 1, wherein: the molecules of the second type comprise one or zero terminal carbon chain that has a chain length equal to or greater than 5.0. ### Claim 3 (depends on 2) The oil composition of claim 2, wherein: the molecules of the second type comprise one or zero terminal carbon chain that has a chain length equal to or greater than Lpg(5%). ### Claim 4 (depends on 1) The oil composition of claim 1, wherein: the molecules of the second type comprise two carbon chains that extend in directions that form an angle theta in the range from 0° to 45° and that are substantially incapable of attaching to pendant groups of two differing molecules of the first type simultaneously substantially free of steric hindrance. ### Claim 5 (depends on 1) The oil composition of claim 1, wherein: the molecules of the second type comprise one or more terminal carbon chains having an average chain length of at least 5.0; each of the molecules of the first type is capable of adjoining multiple molecules of the second type through the interaction between the multiple pendant groups and the terminal carbon chains of the molecules of the second type via van der Waals force to form a stable first complex structure, the first complex structures comprising a first heavy fraction thereof having an equivalent molecular weight of at least 45,000; and the total maximum theoretical concentration of the first heavy fraction of the first complex structure, based on the total weight of the first component and the second component, is C11 wt %, and C11≦10. ### Claim 6 (depends on 1) The oil composition of claim 1, wherein: the second component is a PAO base stock having an isotacticity of at most 50 mol %. ### Claim 7 (depends on 1) The oil composition of claim 1, wherein: the second component is an alkylated aromatic hydrocarbon base stock. ### Claim 8 (depends on 7) The oil composition of claim 7, wherein multiple molecules of the second type comprise two alkyl groups connected to aromatic ring(s) extending in directions that form an angle theta in the range from 0° to 45°, and are substantially incapable of attaching to pendant groups of two differing molecules of the first type simultaneously substantially free of steric hindrance. ### Claim 9 (depends on 1) The oil composition of claim 1, wherein the second component is a lubricant additive. ### Claim 10 (depends on 1) The oil composition of claim 1, wherein the first component is a PAO base stock having a KV100 of at least 50 cSt. ### Claim 11 (depends on 1) The oil composition of claim 1, having shear stability performance as follows: SS100≦5%; SS192≦10%; and SS192>SS100. ### Claim 12 A process for forming a lubricant oil, comprising the following steps: (I) providing a first component comprising multiple molecules of the first type each having multiple pendant groups, where (i) the average pendant group length of the longest 5%, by mole, of the pendant groups of all of the molecules of the first type have an average pendant group length of Lpg(5%), where Lpg(5%)≧5.0; and (ii) a portion of the molecules of the first type have molecular weight greater than or equal to 20,000; (II) providing a second component comprising multiple molecules of the second type each of which individually is capable of adjoining no more than one molecule of the first type via van der Waals force between straight carbon chains to form a stable first complex structure; (III) mixing the first component in a first quantity, the second component in a second quantity, and optionally other components to obtain an oil composition free of a third component, wherein: the second component comprises multiple molecules of the second type each comprising two terminal carbon chains, where (i) the number average molecular weight of the second component is no greater than 2,000; and (ii) the two terminal carbon chains have chain lengths equal to or greater than 5.0 and do not share a common carbon atom. ### Claim 13 (depends on 12) The process of claim 12, wherein: the molecules of the second type comprise two carbon chains that extend in directions that form an angle theta in the range from 0° to 45° and that are substantially incapable of attaching to pendant groups of two differing molecules of the first type simultaneously substantially free of steric hindrance. ### Claim 14 (depends on 12) The process of claim 12, wherein: the molecules of the second type comprise one or more terminal carbon chains; each of the molecules of the first type is capable of adjoining multiple molecules of the second type through the interaction between the multiple pendant groups and the terminal carbon chains of the molecules of the second type via van der Waals force to form a stable first complex structure, the first complex structures comprising a first heavy fraction thereof having an equivalent molecular weight of at least 45,000; and the total maximum theoretical concentration of the first heavy fraction of the first complex structure, based on the total weight of the first component and the second component, is C11 wt %, and C11≦10. ### Claim 15 (depends on 12) The process of claim 12, wherein: the second component is an alkylated aromatic hydrocarbon base stock. ### Claim 16 (depends on 12) The process of claim 12, wherein the second component is a lubricant additive. ### Claim 17 (depends on 12) The process of claim 12, wherein the first component is a PAO base stock having a KV100 of at least 50 cSt. ### Claim 18 (depends on 12) The process of claim 12, wherein the oil composition has shear stability performances as follows: SS20≦10%; and SS100≦15%. ### Claim 19 (depends on 12) The process of claim 12, wherein the oil composition has shear stability performances as follows: SS100≦5%; SS192≦10%; and SS192>SS100.