920results about How to "Improve anti-wear performance" patented technology

The present invention provides lubricating oil compositions having excellent anti-wear properties and anti-fatigue properties as well as excellent low temperature fluidity, particularly suitable for automatic transmissions and/or continuously variable transmissions, and internal combustion engines. The compositions comprises (A) a base oil with a kinematic viscosity at 100° C. of 1 to 8 mm²/s, a pour point of −15° C. or lower, an aniline point of 100° C. or higher, the saturates of the base oil containing 40 percent by mass or more of paraffins, 25 percent by mass or less of one ring naphthenes, and 35 percent by mass or less of two to six ring naphthenes, as the main component, and (B) 0.005 to 0.4 percent by mass of a metallic detergent, (C) 0.005 to 0.2 percent by mass in terms of nitrogen of a succinimide-type ashless dispersant, (D) 0.005 to 0.2 percent by mass in terms of phosphorus of a phosphorus-containing anti-wear agent, and (E) 0.01 to 20 percent by mass of a viscosity index improver with a weight average molecular weight (Mw) of 50,000 or greater, on the basis of the total amount of the composition.

A coating includes a first layer of a ceramic alloy and a second layer disposed on the first layer and including carbon. The coating has a hardness of from 10 to 20 GPa and a coefficient of friction of less than or equal to 0.12. A method of coating a substrate includes cleaning the substrate, forming the first layer on the substrate, and depositing the second layer onto the first layer to thereby coat the substrate.

The invention discloses a method for preparing a composite anti-friction and anti-wear additive of graphene-loaded nanoparticles. The method comprises the following steps: carrying out ultrasonic dispersion on expanded graphite, nanoparticles and a solvent in an ultrasonic emulsification disperser to obtain an evenly mixed dispersion system A; putting the dispersion system A into an ultrasonic cell crusher to carry out ultrasonic stripping treatment, stripping the expanded graphite into multi-layer graphene sheets by ultrasonic action, and loading the multi-layer graphene sheets and the nanoparticles to obtain a dispersion system B after ultrasonic stripping is ended; standing and separating the dispersion system B, taking out a black troubled liquor at the lower part to carry out high-speed centrifugal separation, and washing the separated solid into neutral property, so as to obtain a solid C; putting the solid C into a vacuum drying oven to dry, so as to obtain the composite anti-friction and anti-wear additive of the graphene-loaded nanoparticles. The method disclosed by the invention is simple and convenient, simple in process, strong in controllability, and applicable to industrial production; the prepared composite anti-friction and anti-wear additive has the characteristics of good stability, low friction coefficient, excellent abrasion resistance and the like, and has a broad application prospect in the field of frictional wear.

The invention discloses a self-lubricating composite material gasket for a bearing and a preparing method for the gasket. A fiber mixed fabric is formed by weaving PTFE (polytetrafluoroethylene) fiber with at least one type of other fiber; an impregnated material is coated on the surface of the fiber mixed fabric; the final thickness of the fiber mixed fabric is 0.30 to 0.55 mm; the thickness of the gasket is 0.35 to 0.60 mm; the weight ratio of the PTFE fiber to the gasket is 0.3 to 0.7; and the other types of fibers can be any one or a few of aramid fiber, carbon fiber, high-strength polyester fiber and cotton fiber. The self-lubricating gasket has the characteristics of high strength and low friction coefficient, and is suitable to be used in heavy-duty occasions under the temperatures ranging from -50 to 180 DEG C.

A lubricating oil composition comprising a) an oil of lubricating viscosity having a viscosity index of at least about 95; b) at least one calcium detergent; c) at least one oil soluble titanium compound; d) at least one friction modifier; and e) at least one metal dihydrocarbyldithiophosphate compound. The composition has a Noack volatility of about 15 wt. % or less, and contains from about 0.05 to about 0.6 wt. % calcium from the calcium detergent, titanium metal in an amount of at least about 10 ppm up to about 1500 ppm titanium from the titanium compound, and phosphorus from the metal dihydrocarbyldithiophosphate compound in an amount up to about 0.1 wt. %.

The invention belongs to the technical field of coating compositions and solves the problems of decreased adhesion of the coating to the magnesium alloy surface and easy ageing and cracking of the coating in the prior art. An ultraviolet cured coating comprises the following components in percentage by weight: a hardened first coat comprising 6 to 18 percent of low-functionality monomer, 30 to 51 percent of low-functionality prepolymer, 5 to 8 percent of alumina powder; 0.5 to 1.5 percent of antioxidant, less than 3 percent of auxiliary agent, 1 to 3 percent of photoinitiator and 18 to 35 percent of mixed solvent, an intermediate coat comprising 3 to 15 percent of low-functionality monomer, 35 to 57 percent of low-functionality prepolymer, 0.5 to 6 percent of transparent pigment, 1 to 4 percent of auxiliary agent, 1 to 3 percent of photoinitiator and 23 to 45 percent of mixed solvent, and a high-gloss cover coat comprising 1 to 8 percent of low-functionality monomer, 8 to 15 percent of low-functionality prepolymer, 10 to 22 percent of high-functionality monomer, 36 to 45 percent of high-functionality prepolymer, 1 to 4 percent of auxiliary agent, 3 to 5 percent of photoinitiator and 20 to 40 percent of mixed solvent.

The invention discloses a preparation method of a high-strength and antioxidant rare-earth-based smoke denitration catalyst. The preparation method of the high-strength and antioxidant rare-earth-based smoke denitration catalyst comprises the following steps: by taking titanium dioxide and montmorillonite as carriers and ammonium metatungstate, cerous nitrate and lanthanum nitrate as active components, mixing, ageing, kneading, forming, drying and roasting with the accompanying of auxiliary materials. The auxiliary materials comprise ammonia water, lactic acid, citric acid, stearic acid, glass fiber, wood pulp, hydroxypropyl methyl cellulose, polyoxyethylene, monoethanolamine and water. The product prepared by the method is separated under a high SO2 smoke condition, nitric oxide in the smoke can be decomposed; meanwhile, the purpose of removing mercury and dioxin can be achieved. According to the preparation method of the high-strength and antioxidant rare-earth-based smoke denitration catalyst, the rare earth elements, namely cerium and lanthanum are used as the active components, so that the addition amount of vanadium is reduced, the toxicity of the product is reduced or the product is non-toxic product, the pressure of the post treatment of the product is reduced; the environmental protection pressure is reduced; the product is environmentally friendly; the product can be widely used in the field of thermal power plants, glass factories and chemical plants.

The invention relates to an automobile automatic transmission fluid, and mainly aims at solving the problems of non ideal wear resistance and antioxidant properties of automobile automatic transmission fluids in the prior art. The composition comprises base oil accounting for 85.0 to 97.0% of the total weight; a viscosity index improver accounting for 0.2 to 10.0% of the total weight; an anti-wear reagent at extreme pressure, accounting for 0.2 to 2.0% of the total weight; an antioxidant accounting for 0.05 to 2.0% of the total weight; an antioxidant anticorrosion anti-wear agent accounting for 0.02 to 1.0% of the total weight; a dispersant accounting for 0.1 to 3.0% of the total weight; a detergent accounting for 0.05 to 2.0% of the total weight; an anti rust agent accounting for 0.05 to 3.0% of the total weight; a metal deactivator accounting for 0.02 to 3.0% of the total weight; a pour point depressant accounting for 0.2 to 8.0% of the total weight; and an antifoaming agent accounting for 0.0001 to 0.02% of the total weight. The automobile automatic transmission fluid has the advantages of good antioxidant anticorrosion anti-wear properties.

Disclosed is a nanometer fuel oil addition agent, wherein the constituents comprises (by weight percent): rare earth powder 0.1-10%, fuel synergistic agent 1-10%, dispersing agent 1-20%, oleinic acid 1-10%, castor oil 1-20%, and balancing white oil.

The invention discloses a wear-resisting ceramic coating for non-stick cookware and a preparation method thereof. The coating is composed of a component A and a component B, wherein the weight ratio of the component A to the component B is (2.8-3.2): (1.8-2.0); the component A is composed of silicon dioxide sol, aluminum oxide sol, zirconium oxide sol, water soluble polyester modified epoxy resin, ultrafine aluminum oxide powder processed by azeotropic distillation method, black iron oxides, ultrafine spherical ceramic powder, isopropyl alcohol, deionized water, hydroxyethyl cellulose acetate butyrate and fluorosilicon oil; and the component B is composed of methyl triethoxysilane, amino dimethyldiethoxylsilane, dimethyl dimethoxy silicane, isopropyl alcohol and alcohol. The preparation method comprises the following steps of: mixing the component A and the component B of the coating in a weight ratio of (2.8-3.2): (1.8-2.0); and hermetically stirring and curing the obtained mixture for at least 3 hours under the conditions of 35 DEG C and 800-1000 rpm, thereby obtaining the coating. According to the invention, through carrying out polycondensation reaction on metal oxide colloids and polysiloxane, the bonding strength of a film forming matter is improved.

The invention discloses a lubricating oil wear resistant additive. The lubricating oil wear resistant additive comprises, by mass, 70-80% of base oil, 5-10% of organic molybdate, 1-3% of sorbitan monooleate, 0.7-0.8% of zinc diamyldithiocarbamate, 1-3% of nanometer graphene, and the balance of additives. The lubricating oil wear resistant additive has wear resistance and reduction effects on various lubricating oils, has a restoration function, can reduce the mechanical work noise and power loss, and is suitable for any brand of machine oils, gear oils, hydraulic oils, track oils and other lubricating oils. The invention also discloses a preparation method of the lubricating oil wear resistant additive. The method comprises the following steps: mixing nanometer graphene with sorbitan monooleate, carrying out ultrasonic dispersion, adding base oil, organic molybdate, zinc diamyldithiocarbamate and the additives, and uniformly stirring. The preparation method has the advantages of simple process steps, low cost, and suitableness for industrial production.

The invention discloses self-crosslinking polyacrylate rubber latex, a preparation method thereof and water-based paper printing ink. The self-crosslinking polyacrylate rubber latex is prepared by the following steps: mixing an acrylic ester monomer, a hydrophilic monomer and ADH in a head tank A; mixing water, an emulsifier, the acrylic ester monomer and DAAM in a head tank B; adding water, the emulsifier and polymerizable self-emulsifying functional monomer, stirring the mixture, heating the mixture to 75 DEG C, and dripping a mixture in the head tank A and an initiator to prepare a protective colloid first; dripping the mixture in the head tank B and the initiator at 85 DEG C; and performing a constant-temperature reaction. The water-based paper printing ink is prepared by the following steps: dissolving a phenylethylene-acrylic acid polymer and a pH value regulator in water at 60 DEG C with stirring; adding a pigment and necessary assistant and mixing the mixture to prepare color paste; and uniformly mixing the color paste with the self-crosslinking polyacrylate rubber latex, a surface tension regulator and water. The water-based paper printing ink can be diluted by one or a mixture of two of water and ethanol, can be dried quickly and has high printing adaptability.

The invention relates to an olefinic carbon compound nanometer soft metal wear-resistant self-repairing material with surface modification, and a preparation method thereof. A nanometer olefinic carbon material with wear-resistant performance and a nanometer metal material with an abrasion repairing function are subjected to in-situ composite preparation with a sol-gel method, so that the materialhas dual functions of abrasion resistance and reduction and abrasion self-repairing, and the advantage complementation mechanism of the synergetic effect and the performance of different types of nanometer materials is performed. The olefinic carbon compound nanometer soft metal wear-resistant self-repairing material prepared with the preparation method can be used for realizing the breakthroughof 'exponential increase of wearing resistance under extreme pressure', 'zero abrasion of metal friction' under an extreme pressure situation is broken through, true super lubrication under the extreme pressure situation is realized, traditional sulfur-phosphorus-containing liquid lubrication performance and application technologies are subjected to revolutionary changes due to the occurrence of olefinic carbon compound wear-resistant energy-saving materials, the material does not contain caustic organic sulfur and phosphorus compound, wear-resistant performance is improved, and wear reductionenergy saving performance is also improved.

Molybdenum-free lubricating compositions are provided, having an antioxidation additive composition based on a combination of (1) alkylated diphenylamine (APDA), (2) polyamine dispersant, and (3) monoglyceride, ethoxylated amide, or mixtures thereof. Further synergy is achieved when component (3) is borated, allowing a reduction in phosphorus levels to below 0.08% or even a phosphorus-free composition.

The invention relates to a polyphenylene sulfide fiber spinning technology which comprises the steps as follows: (1) pre-processing materials: mixing graphite powder with a silane coupling agent to obtain modified graphite, and mixing the modified graphite and polyphenylene sulfide resin at a high speed so as to obtain a mixture, and finally pre-crystallizing and drying the mixture in a vacuum drying box to obtain dried powder with less than 50 ppm of water; (2) melting and spinning: feeding the dried powder into a double-screw extruder for melting and spinning so as to obtain a melt; (3) slowly cooling and cooling: thermally forming the smelt after forming silk through a spinneret plate, and then transferring to a slow cooling area, and finally transferring to a cooling area to solidify and form; and (4) drafting and finalizing: carrying out oil applying and silk guiding on the solidified and finalized fiber, and then drafting and finalizing at three times so as to obtain the short fiber with the linear density of 11 dte x. The polyphenylene sulfide fiber spinning technology is low in cost and easy in industrial production; and the fiber material prepared via the technology has good performance.

The invention relates to an anti-rust extreme pressure lithium lubricating grease composition and a preparation method thereof. The composition is prepared from 5.5%-12.5% of thickening agents, 72.8%-91.3% of base oil, 0.5%-3.8% of extreme pressure anti-wear agents, 0.28%-1.25% of antioxidants and 0.02%-1.05% of anti-rust anti-corrosion agents, wherein the base oil is high-viscosity mineral oil. The preparation method of the composition comprises the steps that one third of the base oil and 12-hydroxy stearin or a mixture of 12-hydroxy stearin and stearic acid are heated to the temperature ranging from 60 DEG C to 80 DEG C, a lithium hydroxide solution is added, the temperature is raised to range from 180 DEG C to 220 DEG C after a reaction is completed, one third of quenching oil is added, the extreme pressure anti-wear agents, the anti-rust anti-corrosion agents and the rest of the base oil are added after cooling is conducted, and the composition is prepared after grounding is conducted. The novel lubricating grease containing the extreme pressure components and the anti-rust anti-corrosion components has the excellent extreme pressure property and anti-corrosion property and can be widely applied to severer environment conditions with a medium or heavy load and water.