Abstract:
The present invention relates to novel lubricant and friction modifier compositions optionally comprising a solid lubricant and a binding agent in water medium suitable for lubricating steel-steel interfaces such as tractor-trailer couplings, rail-wheel systems and other heavy duty applications. The invention also relates to compositions described above which include friction modifiers with high or very high and positive coefficients of friction such that the coefficient of friction is considerably higher than the solid lubricant. The invention further relates to compositions comprising a binding agent and a friction modifier with a very high and positive coefficient of friction in a water medium.
Abstract:
Waterborne lubricants comprising: (A) water-soluble inorganic salt; (B) homogeneously dispersed solid lubricant; (C) at least one homogeneously emulsified substance selected from mineral oils, animal and plant oils and fats, and synthetic oils; (D) surfactant; and (E) water, in which the weight ratio (B)/(A) is from 0.05:1 to 2:1 and the weight ratio {C/(A + B)} is from 0.05:1 to 1:1, provide a one-step, highly lubricating waterborne lubricant for use in the cold plastic working of metals. This waterborne lubricant can replace the conversion coating treatment (phosphate, oxalate, etc.) + reactive soap treatment combined lubrication system now in general use and is free of the environmental issues associated with the combined lubrication system, provides for facile coating removal, and is not subject to the decline in seizure resistance caused by nonuniform add-on when large numbers of workpieces are treated together by immersion.
Abstract:
The invention relates to lubricating grease compositions which consist of (a) an oil based on hydrocarbons; (b) a perfluorinated polyalkyl ether oil of the general formula A' - (O-CF2)v-(O-C2F4)w-(O-C3F6)x-(O-C4F8)y-(O-CF2CF(CF3))z-O-A'', in which A' is equivalent to -CF3, -C2F5, -C3F7, -CF2T, T being H or Cl, and v, w, x, y and z are integers >/= 0; (c) a diurea as the thickening agent; (d) conventional additives; and (e) organic and inorganic solid lubricating grease compositions. The invention also relates to a process for preparing said lubricating grease compositions.
Abstract:
A compressible graphite lubricant having a memory suspended in an anaerobic adhesive pipe sealant mixture of a polymerizable liquid acrylate ester monomer and a peroxy polymerization initiator. The graphite particles are formed of expanded graphite which gives the pipe sealant both compressibility and lubricating characteristics. The compound has the ability to change from a liquid with sufficient lubricity to assemble standard API and premium threaded connections without galling and then transform and fix itself into a continuous solid blocking or sealing agent in the gaps of the thread form. The expanded (compressible) graphite has a memory and, as part of the anaerobic fixing compound, allows the pipe sealant to maintain its sealing integrity under cycling of tension, compression, bending, and thermal expansion and contraction. The ability of the compressible lubricant/pipe sealant compound (c) to maintain sealing integrity under cycling of tension, compression, bending, and thermal expansion and contraction loads makes it particularly suitable for use in vertical and horizontal oil and gas wells using oil country tubular goods tubing, casing, and drill pipe. An additional aspect of the invention involves a threaded pipe joint having a compressible lubricant/pipe sealant (c) as described above deposited on at least a part of the threaded portion thereof.
Abstract:
The invention relates to a sintered friction material for the production of friction-linked components, in particular synchronising rings, and a friction-linked component, especially a synchronising ring, with such a sintered friction material. To obatin a good friction gradient, the proposal is for a sintered friction material containing an iron-based matrix and a solid lubricant which contains 0.5 to 10 wt % of molybdenum in relation to the matrix and 20 to 50 vol % of graphite as the solid lubricant. The friction-linked component, especially a synchronising ring, has a support and a friction coating of the friction material described above, while in an embodiment of the invention, trapezoidal grooves are made on the friction surface.
Abstract:
Carbon fluoride particles wherein the number-average particle diameter is 0.01-50 mu m, the content of particles having such diameters that the particle size distribution thereof falls within the range from the number-average particle diameter minus 20 % to the number-average particle diameter plus 20 % amounts to at least 50 % of the whole, the true specific gravity is 1.7 to 2.5, the F to C ratio of the particle as a whole is 0.001 to 0.5, and the F to C ratio at the surface of the particle is invariably greater than that of the particle as a whole and is 0.1 to 2.0. The carbon fluoride particles can be produced by the reaction of carbon particles with fluorine at 350-600 DEG C for 1 minute to 6 hours. The obtained particles have excellent dispersibility and powder fluidity and are used as such or in the form of composite material as water- and oil-repellent, detackifying agent, solid lubricant, conductivity improver, additive for electrostatic development toner, additive for resinous coating layer of electrostatic development carrier, composite material for fixing roller, phosphate-type fuel cell, air/zinc battery and nickel/hydrogen storage battery.
Abstract:
A formable, weldable, temporary, protective coating for use on metals is provided comprising a neutralized acid- or base-functional polymer, lubricant, and solvent including water and an alcohol having no more than four carbon atoms per molecule, whereby the coating is capable of rapid drying at relatively low temperatures while exhibiting a flash point above 100 DEG F.
Abstract:
The invention concerns a threaded tubular connection for drilling or operating hydrocarbon wells, comprising a portion of a tubular element with a male end having an axis of revolution and provided with a first threading extending about the axis of revolution, said male end portion being complementary with a portion of a tubular element with a female end having an axis of revolution and provided with a second threading extending about the axis of revolution, said male and female end portions being capable of being connected by makeup, each of the male and female end portions further comprising a sealing surface with a metal-metal interference, wherein the threading and the sealing surface of one of the two, male or female, end portions are coated with a first metallic anti-corrosion and anti-galling layer wherein zinc (Zn) is the major element by weight, said first metallic anti-corrosion and anti-galling layer being coated with a first passivation layer, and the complementary threading and sealing surface of the male or female end are coated with a second metallic anti-galling layer wherein zinc (Zn) is the major element by weight, the second metallic anti-galling layer being at least partially coated with a lubricant layer comprising a resin and a dry solid lubricant powder dispersed in said resin.
Abstract:
Lubrication and friction reduction improves fuel efficiency and reduces energy consumption. Effective and controllable material removal results in superior surface finishing and planarization. Nanosheets are developed with specific functionalization that can be used to reduce friction and wear, improve the fluidic property, and rheological performance.. The nanosheets can be from the graphite family, transition metal dichalcogenides, transition metal trichalcogenides, semiconducting chalcogenides, metal oxides, layered hydroxides, clays, ternary transition metal carbides and nitrides, and zirconium phosphates and phosphonates, and their corresponding dopants. Tribological, rheological, and polishing applications include lubricants, viscosity modification, and chemical-mechanical planarization. The nanosheets are useful in improving efficiency and lifetime of machinery, saving energy for mechanical operations, and optimizing manufacturing processes in surface engineering.
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.