摘要:
A hydraulic fluid of the present invention has low energy loss due to compression and exhibits excellent responsiveness when being used in a hydraulic circuit. Consequently, the hydraulic fluid realizes energy-saving, high-speed operation and high precision of control in the hydraulic circuit.
摘要:
New fluorinated compounds and method for their preparation. These compounds are used particularly but not exclusively as fluorinated surfactants or as solid lubricants to increase the characteristics of slipperiness and oil-hydro-repellence of surfaces that constitute hulls of watercraft and the like and/or their cladding materials, sleighs, chutes, bases of skis and the like. These compounds having the general formula (I) can be used as such or in solution, pure or in a mixture with other similar or different fluorinated compounds.
摘要:
The invention provides a lube oil which exhibits low vapor pressure despite having low viscosity, is non-flammable, exhibits excellent heat resistance, has tribological characteristics equivalent to those of conventional hydrocarbon-based lube oils, and can be used for a long time under very severe conditions such as high temperature and vacuum. The lube oil contains, as a base oil, an ionic liquid formed of a cation and an anion and having an ion concentration of 1 mol/dm 3 or more.
摘要:
A coated sliding member 10 for use under an environment where it is in contact with lubricant, comprising: a base material 12; and a first hard carbon layer 14 having a thickness of 3 µm or more formed on a surface of the base material by a vacuum arc method using carbon and consisting of diamond-like carbon, containing substantially no hydrogen and being configured only of carbon, and a second hard carbon layer 15 formed on a surface of the first hard carbon layer by a vacuum arc method using carbon and consisting of diamond-like carbon, containing substantially no hydrogen and being configured only of carbon and nitrogen, the film thickness of the second hard carbon layer being 3 to 35% of the film thickness of the first hard carbon layer.
摘要:
A hydraulic fluid of the present invention has low energy loss due to compression and exhibits excellent responsiveness when being used in a hydraulic circuit. Consequently, the hydraulic fluid realizes energy-saving, high-speed operation and high precision of control in the hydraulic circuit.
摘要:
A fluorinated polyether compound represented by the following general formula (1): X-(Rf1)-(CF2)x-(CH2)y-{CHR-CH2}z1-Y1-Z1 or (1'): Z2-Y2-{CH2-CHR}z2-(CH2)y-(CF2)x-(Rf2)-(CF2)x-(CH2)y-{CHR-CH2}z3-Y3-Z3, a lubricating oil, and a magnetic recording medium containing the oil, wherein Rf1 and Rf2 represent each a fluorinated polyether group, perfluoroalkyl group or perfluoroalkenyl group; and Z1, Z2 and Z3 represent each a member selected from among groups containing organic free radicals represented by formulae (5) to (7).
摘要:
Hydraulic fluids having high wet equilibrium reflux boiling points and a good chemical stability, comprising cyano-substituted derivatives of cyclic ketals or acetals of the formula wherein
R is hydrogen or a monovalent radical selected from branched or linear alkyl and cyano-, hydroxy-, alkoxy-, acyloxy-, siloxy- or organosiloxy-substituted derivatives thereof, A is a divalent radical selected from alkylene and alkyl-, aryl-, cyano-, hydroxy-, cyanoalkyl-, hydroxyalkyl-, alkoxy-, polyalkoxy-, acyloxy-, siloxy- or organosiloxy-substituted alkylene and B is a divalent radical selected from branched or linear alkylene and
wherein each R', is hydrogen, methyl or ethyl and m and n are inlegers equal to or greater than 1.
摘要:
There is provided a solid lubricating coating film capable of imparting favorable lubricity and corrosion resistance to a connection for oil country tubular goods even when graphite is employed as a solid lubricant. Two or more solid lubricants are dispersed in a binder resin. Graphite is contained, as one of the two or more types of solid lubricants, in an amount of 50% or more and 90% or less of a total weight of the solid lubricants, and the graphite has a scaly shape and an average particle diameter of 10.0 um or less. A solid lubricant made of one or more materials selected from BN, mica, talc, MCA, MoS 2 , PTFE, PFA, and FEP is further contained as other solid lubricants of the two or more types of solid lubricants. The binder resin contains a PEEK resin having an average particle diameter of 20 um or less as a main component, and the PEEK resin is contained in an amount of 70% or more of a total weight of the binder resin.