593 results about "Antiwear additive" patented technology

Premium synthetic lubricants comprise a synthetic isoparaffinic hydrocarbon base stock and an effective amount of at least one, and typically a plurality of lubricant additives such as a detergent, dispersant, antioxidant, antiwear additive, pout point depresant, VI improver and the like. The base stock is derived from a waxy, paraffinic, Fischer-Tropsch synthesized hydrocarbon feed fraction having an initial boiling point in the range of about 650-750° F. and continuously boiling up to at least 1050° F., by a process which comprises hydroisomerizing the feed and dewaxing the isomerate. The waxy feed has a T90-T10 temperature difference of at least 350° F. and is preferably hydroisomerized without any pretreatment, other than optional fractionation. The lubricant may also contain hydrocarbonaceous and synthetic base stock material. Lubricants, such as fully formulated multigrade automotive crankcase and transmission oils formed by adding a suitable additive package to the isoparaffinic base stock have exhibited performance superior to similar fully formulated oils based on both PAO and conventional, petroleum derived base stocks.

The present invention provides composite lithium-based lubricating grease and a preparation method thereof. The composite lithium-based lubricating grease consists of thickener, base oil and additive. The thickener consists of 12-hydroxy stearic acid lithium dibasic acid and/or lithium borate, and the mol ratio is 1 ®U 0.1 to 1 ®U 0.1to 1. The base oil is mineral oil or poly-alpha-olefin synthesis oil. The additive consists of organic amine compound antioxidant, benzotriazole and barium petroleum sulfonate or barium dinonylnaphthalene sulfonate anti-corrosion additive and rust protection agent, dialkyl dithiocarbamate or dibenzyl disulfide and sulfurized olefin cottonseed oil extreme pressure antiwear additive and nanometer copper powder repairing additive. The contents of the thickener and the base oil are respectively 6 percent to 18 percent and 82 percent to 94 percent according to the weight percentage. The lubricating grease has the multi-effect performances of high dripping point, good high-temperature performance and low-temperature performance, chemical invariability, colloid invariability, antiwear extreme pressure performance etc., and especially has the repairing function towards a damaged bearing.

The invention discloses a screen phenol-containing thiadiazole type antioxygen antiwear additive and a preparation method thereof, wherein the chemical name of the additive is 2-(3,5-di-tert-butyl-4-hydroxy-benzyl)thio-5-alkylthio 1,3,4-thiadiazole. According to the preparation method, 2,5-dimercapto-1,3,4-thiadiazole is adopted as a raw material, the 2,5-dimercapto-1,3,4-thiadiazole and a halogenated alkane are subjected to a nucleophilic substitution reaction under a catalyst effect to generate monoalkyl thiadiazole, and the monoalkyl thiadiazole, formaldehyde and 2,6-di-tert-butylphenol are subjected to a condensation polymerization reaction under a catalyst effect to obtain 2-(3,5-di-tert-butyl-4-hydroxy-benzyl)thio-5-alkylthio 1,3,4-thiadiazole type lubricating oil multifunction additive, wherein the additive is characterized in that good oxidation resistance, extreme pressure property, wear resistance and corrosion resistance are provided for the lubricant with the additive, and the additive can be combined with other additives to provide good synergy effects, can be adopted to partly or completely replace ZDDP, and is applicable for internal combustion engine oils and industrial lubricating oils.

The invention provides an extreme pressure antiwear additive and a preparation method and application thereof; the extreme pressure antiwear additive has a general formula structure as shown in the specification, wherein R1, R2 and R3 in the formula is respectively alkyl groups, aryl groups or aralkyl of a C4-C20 linear chain or branched chain. The extreme pressure antiwear additive provided by the invention is formed by reacting phosphorus oxychloride, C1-C20 alcohols, organic amine and benzotriazole. The extreme pressure antiwear additive provided by the invention can be applied to lubrication oil and lubricating grease with 0.1-2.0wt% of recommended dosage. The extreme pressure antiwear additive provided by the invention has moderate chemical activity, good oil solubility, very good compatibility with other addition agents, no peculiar smell and good thermal oxidation stability, and can effectively reduce the abrasion of devices and oil sedimentation as well as generation of oil sludge. After applied to gear oil, the extreme pressure antiwear additive has excellent antiwear performance and thermal oxidation stability; and simultaneously the extreme pressure antiwear additive can be applied to a lubricating grease and automatic transmission liquid and hydraulic oil of automobiles.

A lubrication system having an oil filter modified to replace or supplement the performance of lubricant additives that may be used within an internal combustion engine to increase the performance of a lubricant. The formulation of the lubricant is changed in accordance with the chemicals placed in the oil filter. For example, when the oil filter contains a strong base, the lubricant concentration of detergent will decrease, in some cases to zero, while the dispersant concentration in the lubricant will increase. The dispersant is the ideal weak base to neutralize combustion acid at the piston ring zone, carry the resultant weak base-combustion acid complex to the strong base in the oil filter, undergo ion exchange with the strong base, immobilize the acid in the oil filter and recycle back to the piston ring zone for reuse as an acid neutralization agent. The reduction or elimination of detergent from the lubricant will reduce the fouling of the emission filter and of deposit formation on engine parts such as the piston. The oil filter may also contain an additive which is slowly released into the lubricant. For example, a ZnDDP anti-wear additive may be slowly released from the oil filter to the lubricant. Because the ZnDDP has low molecular weight alkyl groups it has limited solubility in the lubricant. The rate of release is limited by the equilibrium concentration of the additive in the lubricant. As a result, a relatively constant concentration of the additive may be maintained in the lubricant. The resultant closed system allows the oil drain intervals to be significantly extended.

The invention discloses a light cured dry film lubricant. The film forming substance of the light cured dry film lubricant consists, by weight percent, of 10 to 50% of solid lubricant, 0.2 to 5% of dispersant, 4 to 10% of antiwear additive, 2 to 6% of antioxidant, 0.5 to 2.5% of magnetic additive and 35-80% of coating film bonding matrix, wherein the bonding matrix consists of oligomer, reactive diluent, photo-initiator and auxiliary. The dry film lubricant disclosed by the invention can be cured under ultraviolet light at normal temperature, and is fast in being cured, environment-friendly, excellent in antiwear property and small in frictional surface scratch. The light cured dry film lubricant is applicable for the lubricating antiwear coating on oil-free lubrication components, and especially applicable for the lubricating antiwear coating on the surface of non-temperature-resistant base materials.

A lubricating oil with very low phosphorus content, and having long life as evidenced by a reduction in viscosity increase, oxidation and nitration, comprises a major amount of a base oil of lubricating viscosity and a minor amount of a mixture of neutral and overbased metallic detergents, at least a zinc dialkyldithiocarbamate antiwear additive and at least a dihydrocarbylthiocarbamoyl.

An antioxidizing and antiwear additive for lubricating oil is prepared from cryptophenol and 2-mercapto-5-alkylthio 1,3,4 thiadiazole through condensation reaction at 40-150 deg.C under existance of formaldehyde and acid catalyst.

An engine lubricant that is substantially free of zinc and phosphorous contains an antiwear additive comprising borated 1,2 epoxy mixed polybutenes having an average carbon number in the range of C₂₀ to about C₁₂₀.

The invention provides a lubricant composition for a double-clutch gearbox. The lubricant composition comprises: (A) at least a hydrofinishing III mineral oil with high viscosity index, or polyolefin cogasin, or ester cogasin, or any combination of the above components; (B) at least a viscosity index improver; (C) at least a pour-point depressant; (D) at least a phosphorus-containing antiwear additive; (E) at least a friction modifier; (F) at least a high-temperature anti-oxidant; (G) at least an ashless dispersant; (H) at least a metal detersive; and (I) at least a metal passivator. The above lubricant composition has excellent abrasion resistance, frictional characteristic, synchronization performance, antiwear endurance, high-temperature lubrication stability, antirust and anti-corrosive property, high and low temperature performance, shearing stability, cleaning dispersity, high-temperature anti-foaming property and micropoint corrosion resistance, passes through Vickers pump experiments, FAGFE-8 bearing wear experiments, SAE No.2 frictional characteristic experiments, TE92M anti-shake experiments, SSP-180 synchronous bench durability experiments, CEC L-45 taper roller shearing experiments, CEC L-84 thermooxidizing soundness experiments and FAV-54 mircopoint corrosion experiments, and simultaneously meets lubrication requirements of clutches, a synchronizer, gears and bearings in the double-clutch gearbox.

The invention belongs to the field of petrochemical industry, and relates to a preparation method of a low-cloud-point fatty acid type diesel antiwear additive. The method comprises the following steps: adding polyalpha-olefin into industrial unsaturated fatty acid, uniformly stirring, refrigerating to separate out crystals, filtering, and separating to remove the crystals so as to obtain a low-cloud-point fatty acid filtrate in which crystals are not separated out at a low temperature, wherein the polyalpha-olefin accounts for 0.1-1.0% of the industrial unsaturated fatty acid in percentage by mass; and adding a right amount of solvent oil and pour point depressant into the filtrate to obtain the low-cloud-point fatty acid type diesel antiwear additive. According to the method provided by the invention, the saturated fatty acid crystals can be easily separated out from the fatty acid solution, so that the saturated fatty acid content in the fatty acid is greatly reduced, and the diesel antiwear additive in which saturated fatty acid crystals can not be easily separated out at a low temperature is prepared from the fatty acid used as a raw material; and the cloud point reaches -15 DEG C or below.

The invention discloses an inorganic high-temperature-resistant dry-film lubricant which is prepared from the following components in percentage by weight: 10-50% of solid lubricant, 4-10% of antiwear additive, 0.2-5% of dispersant, 2-6% of antioxidant, 0.5-2.5% of magnetic additive and 35-80% of binding matrix. The dry-film lubricant disclosed by the invention has the advantages of favorable antiwear property, small scratch on the wear surface, and wide range of application temperature, and is especially applicable to lubricating and antiwear application on the surface of a metal substrate part under high-temperature conditions.

The invention discloses a lubricating oil which comprises the following components in percentage by weight: 10-25% of detergent dispersant, 5-15% of antioxidation and anticorrosion agent, 5-15% of extreme-pressure antiwear additive, 10-15% of tackifier, 1-3% of ferrite-base magnetic fluid and the balance of base oil. The lubricating oil additives can greatly improve the antiwear and anti-friction properties of the lubricating oil, enhance the heat stability and convert the iron powder and mud oil generated in the crankshaft and connecting rod tile working process into nano balls, thereby reducing the friction of the machine, lowering the oil temperature and prolonging the service life of the lubricating oil and machine.

The invention relates to ester type flame retardant hydraulic oil containing nano antiwear additive. The mixture ratio by weight of the raw materials is that: 90-95 percent of synthetic ester compound base oil, 1.0-5.0 percent of synthetic multifunctional additive and 1.0-5.0 percent of nano antiwear additive. The production method is that: first, the synthetic ester compound base oil is heated up to 100-120 DEG C, antioxidant is added and stirred for 1-2 hours at 100-120 DEG C until the solid is completely dissolved, then antirust agent and demulsifying agent are added, finally the finished products are filtered to be used; second, the synthetic ester compound base oil is heated up to 60-80 DEG C, and the synthetic multifunctional additive, the nano antiwear additive and antifoamer are added and stirred for 1-3 hours at a constant temperature of 60-80 DEG C, then heating is stopped, and sample is selected for analysis and packaged into finished products after the analysis. The beneficial effects of the invention are that: high temperature using performance and long time lubricant performance of the products are greatly promoted, the service life of hydraulic systems and oil change period can be greatly prolonged.

The invention relates to complex lithium base grease and a preparation method thereof. The preparation method comprises the following processes of: adding 1/4 of base oil and dibasic organic acid into a reaction kettle, heating and melting, and adding monobasic organic acid for reaction; adding 1/4 of base oil, cooling the base oil, and adding lithium hydroxide oil solution for saponification andwarming; adding 1/4 of base oil, moving materials in the reaction kettle to an intermediate kettle, adding the rest 1/4 of base oil into the intermediate kettle, and circulating and cooling; adding an antioxidant, a corrosion inhibitor and an extreme pressure antiwear additive; and uniformly stirring, homogenizing and degassing to obtain the complex lithium base grease. The complex lithium base grease has a simple process, the time for producing the complex lithium base grease with a normal-pressure kettle is short, energy resources are saved, production cost is reduced, the utilization rate of equipment is improved, and the saponification reaction is quick and full.

This invention involves a kind of conductive high polymer high temperature lubricant and preparing method. Made up by the following raw materials according to the ratio by weight: Basic oil is 50%- 90%, soap base thicken pharmaceutical 5% - 30%, conductive high polymer 0.1% - 10%, antirust additive 0.1% - 10%, resist oxygen additive 0.1% - 10%, resist and rub additive 0.1% - 10%.Is it mix attitude electric conduction gather aniline lose the pharmaceutical slowly as subject, conduct and gather aniline, basic oil to adopt. Thick to take pharmaceutical , rust inhibitor , resist oxygen pharmaceutical , is it rub pharmaceutical ,etc. additive mix altogether to resist, do not add any solute , through the craft of heating , mixing , grinding etc., the scattering of making the electric conduction gather the aniline and reach the nanometer grade in the basic oil. Its advantage lies in that it is acid and alkaline resisting, suitable for using under very abominable environmental condition such as being acid or alkaline, and especially suitable for the marine environment for antiseptic.

The invention relates to volatile stamping cutting oil composite for machining of a moderate-thickness aluminum plate and a preparation method thereof. The stamping cutting oil composite comprises the following raw materials in percentage by weight: 90-95 percent of solvent oil, 1-4 percent of antiwear additive, 1-4 percent of oiliness additive, 0.5-2 percent of antirust additive and 0.2-1 percent of antioxidant; the solvent oil has low sulphur content, low aromatic hydrocarbon content, no toxicity and smell and has the kinematic viscosity of 1.5-3.5mm<2>/s at 20 DEG C; the antiwear additive is selected from phosphates; the oiliness additive contains more than one of fatty alcohol and fatty acid methyl ester; the antirust additive is sodium alkylsulfonate; and the antioxidant is an antioxidant BHT (butylated hydroxytoluene). The preparation method of the volatile stamping cutting oil composite for the machining of the moderate-thickness aluminum plate, provided by the invention, is simple and convenient; and the composite provided by the invention does not contain a chlorine extreme pressure agent, is a biological environment-friendly product and has the advantages of excellent extreme pressure lubrication performance and favorable demoulding performance, volatilization completeness, no trace leaving, no clean, extremely low smell, no irritation to skin, time and labor saving and capability of greatly prolonging the service life of a mould.

A lubrication composition providing excellent anti-wear protection for corrosion-resistant materials which comprises a major amount of a synthetic ester base oil, and a minor amount of a molybdenum compound and an anti-wear additive selected from the group consisting of 1,3,4-thiadiazole derivative as an anti-wear additive, the reaction products of 2,5-dimercapto-1,3,4-thiadiazole dimers and poly(ether)glycols, and 2,5-dimercapto-1,3,4-thiadiazole monomer and mixtures thereof. Also described is a method for imparting anti-wear properties to a corrosion resistant material, comprising using the lubricating composition of the invention.

The antiwear lubricating paint for engine piston ring is one kind of dry film lubricant. The paint consists of compoiste adhesive, antiseptic additive, antiwear additive, surfactant and dispersing medium. It is painted to the surface of piston and high temperature cured to form firm, compact and dense solid film with excellent antiwear resistance, high impact resistance and good sealing performance.

The invention discloses ash-free anti-wear hydraulic oil. The ash-free anti-wear hydraulic oil consists of the following components in percentage by weight: 92 to 97 percent of base oil, 0.5 to 3 percent of ash-free extreme-pressure anti-wear additive, 0.01 to 2 percent of metal deactivator, 0.01 to 0.05 percent of purification dispersant, 0.1 to 1.0 percent of antioxidant, 0.5 to 1.0 percent of antioxidant preservative, 0.01 to 0.08 percent of antirusting agent, 0.1 to 1.0 percent of viscosity index improver and 0.01 to 0.05 percent of anti-foaming agent, wherein the base oil is steam turbine oil with relatively high oxidation stability and emulsification resistance; the ash-free extreme-pressure anti-wear additive is at least one of S-P-N, S-P and P type ash-free extreme-pressure anti-wear additives; and the purification dispersant is DT-6 sulfurized calcium alkyl phenolate. The ash-free anti-wear hydraulic oil has high wear resistance, oxidation resistance, hydrolytic stability and rust resistance, can meet the requirement of high abrasion resistance of vane pumps, and can also meet the requirement of low corrosivity of plunger pumps.

The invention provides a compressor oil compound which comprises the following materials on the basis that the weight of base oil is 100 percent: (1) a main amount of hydrogenization mineral oil base oil; (2) 1 to 15 weight percent of ashless dispersant; (3) 0.01 to 1 weight percent of the combination of half-hindered phenolic antioxidant or amine antioxidant and half-hindered phenolic antioxidant; (4) 0.05 to 2 weight percent of antiwear additive; (5) 0.01 to 0.5 weight percent of friction modifier; (6) 0.01 to 0.2 weight percent of metal passivator; and (7) 0 to 1000ppm of antifoamer. The compressor oil has the advantages of high viscosity index, excellent lubricating property and good oxidative stability.

The invention discloses a green microemulsion metal cutting fluid and is characterized in that its formula comprises mixed base oil, synthetic ester, an oiliness agent, an extreme pressure antiwear additive, a clean dispersant agent, an antirust anticorrosion additive, an anti-oxidant, an oil mist inhibitor, a bactericide, an antifoaming agent, an anionic surfactant, a nonionic surfactant and a cosurfactant. A preparation method of the green microemulsion metal cutting fluid comprises the following steps of: firstly preparing an oil phase, heating the base oil to 50-60 DEG C, successively adding the oiliness agent, synthetic ester, the extreme pressure antiwear additive, the clean dispersant agent and the antirust anticorrosion additive, uniformly stirring and mixing to prepare an oil phase system; then preparing a water phase, successively adding the bactericide and the antifoaming agent into water, uniformly stirring and mixing to prepare a water phase system; finally emulsifying the systems, and slowly adding the water phase into the oil phase system to form the green microemulsion metal cutting fluid. The green microemulsion metal cutting fluid provided by the invention has advantages of excellent extreme pressure wear resistance, resistance to hard water, long using period and the like.

The invention relates to a bimetal powder of copper and nickel and a preparation method thereof. The invention solves the defect of easy oxidation of the simple substance nanometer copper powder and improves the use effect of the ordinary copper nickel composite powder. Referring to the prior art, the invention firstly prepares a nanometer copper powder, the copper powder is stirred and dispersed homogeneously in the water, and suspension liquid of the copper powder is prepared; the suspension liquid of the copper powder is blended with the nickel sulfate solution comprising macromolecule protective agent and special copper coordination agent thiourea so as to cause a replacement reaction between nickel ion and the copper; surfaces of the ultrafine copper particles are partly or all coated with the nickel, thus forming the core-shell copper-nickel bimetal nanometer powder. The bimetal powder can be taken as lubricant, lubricating grease extreme pressure-antiwear additives, additives in powder metallurgy, or as porous materials, antibacterial materials, antifouling coatings, conductive materials, magnetic materials, self-lubricating materials, antifriction materials, diamond tools, and raw materials or additives of electrical carbon products.

The invention provides a gear lubricant composite for manual transmissions of the light cars, comprising (A) at least one type of refining mineral oil with high viscosity index, or polyolefin synthesis oil, or ester lubricants, or a free composite of the above components, (B) at least one type of viscosity index improver, (C) at least one type of pour point depressant, (D) at least one type of extreme pressure additive with sulfurs, (E) at least one type of anti-wear additive with phosphorus, (F) at least one type of wear, oxygen, and corrosion-preventing multifunctional additive with phosphorus, (G) at least one type of anti-rusting additive, and (H) at least one type of friction modifier. The lubricant composite has excellent performance of high and low temperature, which can meet the requirements of gear oil with a viscosity grade of 75W/90. Moreover, passing the full-size gear bench tests as CRCL-42, L-37, L-33, L-60, and L-60-1 as well as cycle bench tests for the manual transmissions of the light cars, the gear lubricant composite can meet lubrication requirements of the manual transmissions of the light top-grade cars.

The invention discloses a lubricating oil composition and a preparation method thereof. According to the method, base oil, detergent, dispersant, preservative, extreme-pressure antiwear additive, oily agent, antioxidant, viscosity index improver, rust inhibitor, pour-point depressant, antifoaming agent and novel lubricating oil additive are compounded to obtain the lubricating oil composition. The method has the advantages of simple and feasible production technique, low equipment investment, low energy consumption and no environmental pollution, and is beneficial to popularization and application. The lubricating oil composition can be widely used in the fields of mechanical industry, automobile industry, precision instruments, power industry, metallurgical industry, die making and application industry, iron and steel industry, machine tool industry and the like, and has wide application prospects.