Abstract:
A lubricating oil composition for automotive transmissions is disclosed. It offers an automotive transmission (especially a fuel-saving type) which satisfies all requirements as regards the properties of resistance to churning, maintenance of the oil film and low-temperature viscosity. It comprises a GTL low viscosity base oil and a Group 1 high viscosity base oil.
Abstract:
An object of the present invention is to provide a compound that can inactivate active alumina in a magnetic head, a lubricant having decomposition resistance, and a magnetic disk using the lubricant. The present invention relates to a fluoropolyether compound represented by formula (1): €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒR 1 -CH 2 -R 2 -CH 2 -R 3 wherein R 1 is C 1 -C 10 alkoxy; R 2 is-(CF 2 ) p O(CF 2 O) x (CF 2 CF 2 O) y (CF 2 CF 2 CF 2 O) z (CF 2 CF 2 CF 2 CF 2 O) w (CF 2 ) p -; x and y are each a real number of 0 to 30; z is a real number of 0 to 30; w is a real number of 0 to 20; p is an integer of 1 to 3; R 3 is-OCH 2 CH(OH)CH 2 OH, -OCH 2 CH(OH)CH 2 OCH 2 CH(OH)CH 2 OH, -O(CH 2 ) m OH, or-OCH 2 (OH) CHCH 2 -OC 6 H 4 -R 4 ; m is an integer of 2 to 8; and R 4 is hydrogen, C 1 -C 4 alkoxy, amino, or an amide residue; and also relates to a lubricant comprising the compound and to a magnetic disk.
Abstract:
The invention provides a lubricating composition containing an oil of lubricating viscosity and a compound obtained/obtainable by a process comprising reacting a glycolic acid, a 2-halo-acetic acid, or a lactic acid, or an alkali or alkaline metal salts thereof, (typically glycolic acid or a 2-halo-acetic acid) with at least one member selected from the group consisting of an amine, an alcohol, and an aminoalcohol. The invention further relates to the use of the lubricating composition in an internal combustion engine.
Abstract:
A gear oil composition is provided. The composition comprises a synergistic amount of an isomerized base oil having consecutive numbers of carbon atoms and less than 10 wt% naphthenic carbon by n-d-M for the gear oil composition to have a traction coefficient at 15 mm 2 /s. of less than 0.030 and a pressure viscosity coefficient of at least 15.0 at 80 °C. In one embodiment, the sufficient amount of isomerized base oil ranges from 20 to 80 wt. % based on the total weight of the gear oil composition.
Abstract:
To provide a novel composition useful as lubricant composition or the like. It is disclosed a composition comprising an oily medium and at least one compound represented by following formula (Z).
A-L-{D 1 -(E) q -D 2 -(B) m -Z 1 -R} p (Z)
A represents a p-valent chain or cyclic residue; L represents a single bond or a divalent linking group; p represents an integer of 2 or more; D 1 represents a carbonyl group (-C(=O)-) or a sulfonyl group (-S(=O) 2 -); D 2 represents a carbonyl group (-C(=O)-), a sulfonyl group (-S(=O) 2 -), a carboxyl group (-C(=O)O-), a sulfonyloxyl group (-S(=O) 2 O-), a carbamoyl group (-C(=O)N(Alk)-) or a sulfamoyl group (-S(=O) 2 N(Alk)-); E represents a divaltn group; R represents a hydrogen atom, a substituted or non-substituted C 8 or longer alkyl group, a perfluoroalkyl group or a trialkylsilyl group; B represents an oxyethylene group or the like; and Z 1 represents a single bond or a divalent group.
Abstract:
A composition that includes solid lubricant nanoparticles and an organic medium is disclosed. Also disclosed are nanoparticles that include layered materials. A method of producing a nanoparticle by milling layered materials is provided. Also disclosed is a method of making a lubricant, the method including milling layered materials to form nanoparticles and incorporating the nanoparticles into a base to form a lubricant.
Abstract:
Lubricating compositions, containing non-modified and modified multifunctional, polyionic copolymers and an aqueous lubricating medium, and methods for making and using such compositions are described herein. The lubricating compositions are applied to metal oxide surfaces, which are in contact with each other. The copolymers can serve as a surface protective boundary layer for the sliding surfaces, or they can also be used for the immobilization of further molecules, which can modify the tribological properties of the surfaces.