Disclosed are Group III base stocks comprising at least 30 wt % naphthenes, a viscosity index from 120 to 145; and a unique ratio of molecules with multi-ring naphthenes to single ring naphthenes (2R+N/1RN). A method for preparing the base stocks is also disclosed. Also disclosed is a lubricating oil having the base stock as a major component, and an additive as a minor component.

A comb copolymer viscosity modifier may be made by polymerization comprising at least, or consisting essentially of, the following monomers: (a) a hydrogenated polybutadiene-based (alk)acrylate ester macromonomer (which repeat units may comprise from 7.0 wt % to 18 wt % of the repeat units of the comb copolymer viscosity modifier); (b) a C.sub.3-C.sub.8 alkyl (alk)acrylate ester monomer (which repeat units may comprise from 40 wt % to 71 wt % or from 45 wt % to 64 wt % of the repeat units of the comb copolymer viscosity modifier); and (c) a C.sub.12-C.sub.24 alkyl (alk)acrylate ester monomer, wherein repeat units based on the C.sub.12-C.sub.24 alkyl (alk)acrylate ester monomer comprise at least 21.0 wt % (and optionally up to 35.0 wt %) of repeat units of the comb copolymer viscosity modifier. Lubricant compositions comprising the comb copolymer viscosity modifier, as well as uses thereof and methods for modifying viscosity, are also contemplated herein.

A method for producing a renewable base oil from a feedstock of biological origin includes providing a feedstock, the feedstock including: 2-95 wt % of a mixture of free fatty acids; 5-98 wt % fatty acid glycerols selected from mono-glycerides, di-glycerides and tri-glycerides of fatty acids; 0-50 wt % of one or more compounds selected from the list consisting of: fatty acid esters of the non-glycerol type, fatty amides and fatty alcohols; a major part of the feedstock being a mixture of free fatty acids and fatty acid glycerols; subjecting all or part of the feedstock to ketonisation reaction conditions where two free fatty acids react to yield a ketone stream, and subjecting the ketone stream to both hydrodeoxygenation and to hydroisomerisation reaction conditions, to yield a deoxygenated and isomerised base oil product stream containing the renewable base oil.

The present invention relates to drilling fluid comprising one or more linear internal olefin having from 15 to 18 carbon atoms and containing less than 25% branching based on the total amount of the linear internal olefin and a hydrogenated Fischer-Tropsch derived product.

This disclosure provides a triglyceride oil possessing an extremely low cloud point and low viscosity concomitant with a higher than anticipated saturated fatty acid content, very low polyunsaturated fatty acid content, and low iodine value. While many naturally occurring triglyceride oils possess one or more of these properties, natural triglyceride oils lack one or more of these attributes, thus making them less than ideal in industrial applications, such as lubricants, fuels, or dielectric fluids. The combination of attributes possessed by a triglyceride oil described herein, achieved without the addition of any additives, is unique compared with natural counterparts and as such, can find wide applications in the aforementioned fields.

A bio-lubricant composition includes a first component that includes a first triglyceride, which is part of a cooking oil; a second component that includes a first epoxidized triglyceride; a third component that includes a hydroxylated triglyceride; a fourth component that includes a first fatty acid ester moiety; a fifth component that includes a first epoxidized fatty acid ester; and a sixth component that includes a hydroxylated fatty acid ester. A mixture of the first to sixth components at room temperature have a viscosity between 40 and 200 centipoise, and the composition is substantially free of free fatty acids.

A fluid includes a base stock and one or more additives. The base stock has a viscosity index of at least 80, and either a kinematic viscosity at 40° C. of at least 320 cSt or a kinematic viscosity at 100° C. of at least 14 cSt. The base stock includes greater than or equal to about 90 wt % saturates, less than or equal to about 10 wt % aromatics, and a sum of terminal/pendant propyl groups and terminal/pendant ethyl groups of at least 1.7 per 100 carbon atoms. The fluid has a thermal conductivity measured according to ASTM D7896 at 140° C. of 0.12 W/m.Math.K or greater.

One aspect of the present invention is a refrigerating machine oil containing: a base oil; and a partial ester of a carboxylic acid and a polyhydric alcohol, wherein the carboxylic acid contains an unsaturated carboxylic acid.

One aspect of the present invention is a refrigerating machine oil containing: a base oil; and a partial ester of a carboxylic acid and a polyhydric alcohol, wherein the carboxylic acid contains an unsaturated carboxylic acid.

To provide a lubricant solution capable of forming a uniform coating film by using a solvent composition which has a small impact on the global environment and which is excellent in solubility of the fluorinated ether compound, and a method for producing a substrate provided with a lubricant coating film.

A lubricant solution comprising a solvent composition which comprises a HCFO and at least one member selected from the group consisting of 1,1,1,2,2,3,3,4,4,5,5,6,6-tridecafluorohexane, 1,1,1,2,2,3,3,4,4,5,5,6,6-tridecafluorooctane, nonafluorobutyl methyl ether, nonafluorobutyl ethyl ether and 3-methoxy-4-trifluoromethyl-1,1,1,2,2,3,4,5,5,5-decafluoropentane, and a fluorinated ether compound which is a fluorinated ether compound having a perfluoropolyether chain and CF.sub.3 groups at both terminals, wherein the perfluoropolyether chain does not have a branched structure.