Abstract:
The present invention provides a lubricating oil composition for reducing a friction coefficient adjacent to the surface of being subjected to lubrication. In particular, the present invention provides nanoporous particles capable of being dispersed in a lubricating oil composition comprising base oil having a lubricant viscosity. Since the nanoporous particles having nano-sized, oil soluble pores according to the present invention reduces a friction coefficient, and in the long term, gradually releases an effective ingredient, the lubricating oil composition comprising the same of the present invention can act as a reducing agent for reducing friction for a long period of time, and thereby, exhibit excellent lubricant effects.
Abstract:
A lubricating oil composition is disclosed which comprises (a) a major amount of an oil of lubricating viscosity, (b) one or more phosphorus-containing anti-wear additives other than a zinc dithiophosphate, (c) one or more ashless dispersants, (d) one or more metal-containing detergents, and (e) one or more antioxidants, wherein the lubricating oil composition contains no more than about 0.03 weight percent of phosphorus, based on the total weight of the natural gas engine lubricating oil composition, and further wherein the lubricating oil composition is substantially free of any zinc compounds.
Abstract:
L A molybdated suednimide complex prepared by a process which comprises (a) reacting an alky! or alkeny! succLmrnide of a polyamine of formula (I) wherein R is an about C12 to C30 alkyl or alkenyl group, a and b are independently 2 or 3, and x is 0 to 10, with an eihylenicaUy unsaturated carboxylic acid or anhydride thereof; and (b) reacting the suceinim?de product of step (a) with an acidic molybdenum compound. 2, The molybdated succu?mide complex of Claim 1, wherein R is about C12 to about C24 alky! or alkenyl group, a and b are each 2, and x is 2 to 5. 3, The molybdaied succinimide complex according to Claims I or 2, wherein the etbyienicaily unsaturated carboxylic acid or anhydride is an athy?enicaily unsaturated monocarboxyiic acid or anhydride thereof, 4, The molybdated sueeimmide complex according to Claims 1 or 2, wherein the ethylemcally unsaturated carboxylic acid or anhydride is an ethylepicaliy unsaturated dicarboxylic acid or anhydride thereof
Abstract:
An electric submersible motor is provided that includes a plurality of rotors and bearings mounted on a shaft, and a stator external to said rotors. A running clearance is located between an inner diameter of the stator and external diameter of the rotors, and includes a lubricating oil that includes a base hydrocarbon oil and a plurality of nanoparticles. Also provided is an improved lubricant oil and method of preparation thereof are provided. The lubricant oil includes a hydrocarbon containing base oil and a plurality of nanoparticles. The nanoparticles may be present in an amount up to 30% by volume.
Abstract:
A lubricating oil composition having a sulfur content of up to about 0.4 wt. % and a sulfated ash content of up to about 0.5 wt. % as determined by ASTM D874 is disclosed which comprises (a) a major amount of an oil of lubricating viscosity; (b) at least one oil-soluble or dispersed oil-stable boron-containing compound having greater than 400 ppm of boron, based upon the total mass of the composition; and (c) at least one oil-soluble or dispersed oil-stable molybdenum- containing compound having at least about 1100 ppm of molybdenum, based upon the total mass of the composition; wherein the lubricating oil composition has a ratio of sulfur to molybdenum of less than or equal to about 4:1.
Abstract:
A composite sliding structure having a low friction coefficient and high wear resistance. The composite sliding structure (1) has segment structure hard films (2) placed, with hard films separated from each other, on the surface of a base substance (4), a segment groove (5) formed between the individual segment structure hard films (2, 2), and solid lubrication layers (3) placed in a covering manner in the segment grooves (5) or fluid-like lubrication layers (3') placed in an impregnated manner in the segment groves (5). Further, a method of producing the composite sliding structure (1) is performed by forming, in a covering manner, the segment structure hard films (2) on the surface of the base substance (4) by using a physical vapor-phase growth method or a chemical vapor-phase growth method, and covering the segment grooves (5), provided between the segment structure hard films (2, 2) with intervals in between, with the solid lubrication layers (3) or impregnating the fluid-like lubrication layers (3') in the segment grooves (5).
Abstract:
An aqueous one step type lubricating agent for efficient cold forging, characterized in that it comprises (A) a water-soluble inorganic salt, (B) a wax and (C) a metal salt of a fatty acid in a form dissolved or dispersed in water, wherein weight ratios of solid contents are 0.60 to 0.70 for (B)/(A) and 0.1 to 0.3 for (C)/(A). The water-soluble inorganic salt can be selected from among a sulfate, a silicate, a borate, a molybdate and a tungstate. As the wax, use can be made of a synthetic wax being dispersible in water and having a melting point of 70 to 150 DEG C. As the metal salt of a fatty acid, use can be made of a reaction product of a saturated fatty acid having 12 to 26 carbon atoms with at least one metal selected among zinc, calcium, barium, aluminum and magnesium.
Abstract:
The present invention relates to methods and compositions for compensating the wear of rubbing surfaces in machine parts and for carrying out repair operations without dismantling any equipment. This invention essentially relates to a method for forming a protection coating on the friction surfaces of machine parts made of iron-based alloys, wherein said method involves feeding lubricants as well as a repair and restoration composition between said friction surfaces. This composition contains ground components which are capable of interaction with the material of said surfaces in order to form a protection coating thereon during the operation process of the mechanism. The components of the repair and restoration composition consist of ophite, nephrite and schungite. The use of this method and of this composition enables the formation of protection coatings on the surfaces to be treated.