# US 2014/0194332 A1 · Two-phase lubricating oil composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0194332 A1 - Document ID: US20140194332A1 - Status: Published application - Kind: A1 - Application number: 14/233,779 - Filed: 2012-07-10 - Published: 2014-07-10 - Earliest claimed: 2011-07-21 - Assignees: Shell Oil Company - Inventors: Kumiko Kamata; Ryuji Maruyama; Noriaki Shinoda; Hiroyuki Tazaki - Web page: https://patentgrep.com/patent/US20140194332A1 ## CPC - C10M 141/02: at least one of them being an organic oxygen-containing compound - C10M 111/04: at least one of them being a macromolecular organic compound - C10M 169/04: Mixtures of base-materials and additives - C10M 2203/1006: used as base material - C10M 2203/1025: used as base material - C10M 2205/0285: used as base material - C10M 2205/173: used as base material - C10M 2207/281: of (cyclo)aliphatic monocarboxylic acids - C10M 2207/282: of (cyclo)aliphatic oolycarboxylic acids - C10M 2207/283: of polyhydroxy compounds - C10M 2207/285: of aromatic polycarboxylic acids - C10M 2209/104: of alkylene oxides containing two carbon atoms only - C10M 2209/1045: used as base material - C10M 2209/105: of alkylene oxides containing three carbon atoms only - C10M 2209/1055: used as base material - C10M 2209/107: of two or more specified different alkylene oxides covered by groups C10M2209/104 - C10M2209/106 - C10M 2209/1075: used as base material - C10N 2020/017: {Specific gravity or density} - C10N 2020/02: Viscosity; Viscosity index - C10N 2030/02: Pour-point; Viscosity index - C10N 2030/56: {Boundary lubrication or thin film lubrication} - C10N 2030/70: {Soluble oils} - C10N 2040/02: Bearings - C10N 2040/04: Oil-bath; Gear-boxes; Automatic transmissions; Traction drives - C10N 2040/08: Hydraulic fluids, e.g. brake-fluids - C10N 2040/25: Internal-combustion engines - C10N 2040/30: Refrigerators lubricants {or compressors lubricants} - 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 Lubricating oil compositions are provided herein that comprise a mixture of: (A) a hydrocarbon as a low-viscosity constituent, (B) a polyalkylene glycol (PAG) as a high-viscosity constituent wherein the oxygen/carbon weight ratio is in the range of from 0.450 to 0.580, and (C) a compound as a control constituent wherein the oxygen/carbon weight ratio is in the range of from 0.080 to 0.350. Methods of lubricating a surface using such lubricating compositions are also provided herein. ## Claims ### Claim 1 A lubricating oil composition comprising a mixture of: (A) a hydrocarbon as a low-viscosity constituent, (B) a polyalkylene glycol (PAG) as a high-viscosity constituent wherein the oxygen/carbon weight ratio is in the range of from 0.450 to 0.580, and (C) a compound as a control constituent wherein the oxygen/carbon weight ratio is in the range of from 0.080 to 0.350. ### Claim 2 (depends on 1) A lubricating oil composition in accordance with claim 1 wherein the low-viscosity constituent is selected from a poly α-olefin, a mineral oil, a GTL base oil, and mixtures thereof. ### Claim 3 (depends on 1) A lubricating oil composition in accordance with claim 1 wherein the control constituent is an aliphatic ester compound and the carbon chain other than in the ester group is C4 to C18. ### Claim 4 (depends on 1) A lubricating oil composition in accordance with claim 1 wherein the density of the low-viscosity constituent is in the range of from 0.750 to 0.950 g/cm3, and the density of the high-viscosity constituent is in the range of from 1.000 to 1.050 g/cm3. ### Claim 5 (depends on 1) A lubricating oil composition in accordance with claim 1 wherein the density of the control constituent is in the range of from 0.800 to 1.000 g/cm3. ### Claim 6 (depends on 1) A lubricating oil composition in accordance with claim 1 wherein the kinematic viscosity at 40° C. of the low-viscosity constituent is in the range of from 5 to 500 mm2/s. ### Claim 7 (depends on 1) A lubricating oil composition in accordance with claim 1 wherein the kinematic viscosity at 100° C. of the high-viscosity constituent is in the range of from 2.5 to 100 mm2/s. ### Claim 8 (depends on 1) A lubricating oil composition in accordance with claim 1 wherein the kinematic viscosity at 100° C. is in the range of from 1.5 to 100 mm2/s. ### Claim 9 (depends on 1) A lubricating oil composition in accordance with claim 1 wherein, relative to 100% by weight of the total composition, the blended proportion of the low-viscosity constituent is in the range of from 30 to 80% by weight, the blended proportion of the high-viscosity constituent is in the range of from 3 to 35% by weight, and the blended proportion of the control constituent is in the range of from 1 to 30% by weight. ### Claim 10 (canceled) ### Claim 11 (canceled) ### Claim 12 A method comprising: applying a lubricating oil composition to a surface in relative movement to another surface, wherein the lubricating oil composition comprises a mixture of: (A) a hydrocarbon as a low-viscosity constituent, (B) a polyalkylene glycol (PAG) as a high-viscosity constituent wherein the oxygen/carbon weight ratio is in the range of from 0.450 to 0.580, and (C) a compound as a control constituent wherein the oxygen/carbon weight ratio is in the range of from 0.080 to 0.350. ### Claim 13 (depends on 12) A method in accordance with claim 12 wherein the surface is a surface of a rotating member or a sliding member in a vehicle or industrial machine. ### Claim 14 (depends on 12) A method in accordance with claim 12 wherein the surface is in an engine, a gear mechanism, a speed-change gearbox, a bearing, a hydraulic apparatus or compression machinery. ### Claim 15 (depends on 12) A method in accordance with claim 12 wherein the low-viscosity constituent is selected from a poly α-olefin, a mineral oil, a GTL base oil, and mixtures thereof. ### Claim 16 (depends on 12) A method in accordance with claim 12 wherein the control constituent is an aliphatic ester compound and the carbon chain other than in the ester group is C4 to C18. ### Claim 17 (depends on 12) A method in accordance with claim 12 wherein the density of the low-viscosity constituent is in the range of from 0.750 to 0.950 g/cm3, and the density of the high-viscosity constituent is in the range of from 1.000 to 1.050 g/cm3. ### Claim 18 (depends on 12) A method in accordance with claim 12 wherein the density of the control constituent is in the range of from 0.800 to 1.000 g/cm3. ### Claim 19 (depends on 12) A method in accordance with claim 12 wherein the kinematic viscosity at 40° C. of the low-viscosity constituent is in the range of from 5 to 500 mm2/s. ### Claim 20 (depends on 12) A method in accordance with claim 12 wherein the kinematic viscosity at 100° C. of the high-viscosity constituent is in the range of from 2.5 to 100 mm2/s. ### Claim 21 (depends on 12) A method in accordance with claim 12 wherein the kinematic viscosity at 100° C. is in the range of from 1.5 to 100 mm2/s. ### Claim 22 (depends on 12) A method in accordance with claim 12 wherein, relative to 100% by weight of the total composition, the blended proportion of the low-viscosity constituent is in the range of from 30 to 80% by weight, the blended proportion of the high-viscosity constituent is in the range of from 3 to 35% by weight, and the blended proportion of the control constituent is in the range of from 1 to 30% by weight.