190 results about "Metal deactivator" patented technology

The invention discloses grease special for a high-temperature bearing, a stirring and conveying device and a preparation method of the grease. The stirring and conveying device comprises a kettle body, a temperature control system, an internal circulation stirring system and an external circulation conveying system. The preparation method comprises the following steps: heating and stirring, adding the synthetic base oil, the boron nitride and the composite lithium-based soap-based thickening agent into a kettle body, and starting a temperature control system, an internal circulation stirring system and an external circulation conveying system; preserving heat; heating and stirring, adding an oiliness agent butyl oleate, a metal deactivator and an auxiliary antioxidant into the kettle body, and starting a temperature control system, an internal circulation stirring system and an external circulation conveying system; cooling is performed; and discharging. The special grease for the high-temperature bearing comprises the following components in parts by weight: 60-80 parts of synthetic base oil, 1-5 parts of boron nitride, 10-15 parts of a composite lithium-based soap-based thickening agent, 5-10 parts of an oiliness agent butyl oleate, 1-5 parts of a metal deactivator and 1-5 parts of an auxiliary antioxidant.

The invention belongs to the technical field of hydraulic oil, and particularly discloses super-lubricity energy-saving anti-wear hydraulic oil and a preparation method thereof. The super-lubricity energy-saving anti-wear hydraulic oil is prepared from the following components in parts by weight: 75 to 90 parts of composite base oil, 5 to 7 parts of viscosity index improver, 3 to 5 parts of friction improver, 1 to 3 parts of pour point depressant, 0.005 to 2 parts of anti-rust preservative, 0.003 to 0.02 part of demulsifying agent, 0.01 to 0.03 part of anti-foaming agent, 0.05 to 1 part of clearing agent, 0.05 to 2 parts of antioxidant and 0.05 to 1.5 parts of metal deactivator, the composite base oil is composed of coal base oil, second-class base oil and alkyl naphthalene base oil according to the mass ratio of 5: 4: 1. The super-lubricity energy-saving anti-wear hydraulic oil provided by the invention is high in viscosity index, excellent in shear stability, excellent in oxidation stability, excellent in low-temperature performance and small in friction coefficient, the service life of a product is greatly prolonged, the super-lubricity energy-saving and environment-friendly performance requirements are met, and the super-lubricity energy-saving anti-wear hydraulic oil has a wide application prospect.

The invention discloses a high-performance clean type anti-wear hydraulic oil complexing agent which is prepared from the following substances in parts by mass: 30 to 60 parts of an antioxidant, 20 to 40 parts of an anti-wear agent, 2 to 5 parts of boronized polyisobutylene bis-succinimide, 2 to 7 parts of thiocarbamate, 4 to 10 parts of dodecenylsuccinic acid and 0.2 to 2 parts of graphene nanosheets. The lubricating oil is prepared from the following components in parts by weight: 0.5-1.5 parts of a metal deactivator, 0-2 parts of DISUPER S24 and 30-50 parts of base oil. The preparation method comprises the following steps: S21, heating the base oil, adding the boronized polyisobutylene bis-succinimide and the thiocarbamate, and stirring; s22, sequentially adding an antioxidant, an anti-wear agent, dodecenylsuccinic acid, DISUPER S24 and a metal deactivator into the solution obtained in the step S11, heating to 80 DEG C, and reacting for 2 hours; and S23, adding graphene nanosheets into the solution obtained in the step S22, and carrying out ultrasonic dispersion for 1 hour to obtain the product.

The invention discloses an oxidation-resistant monomer casting nylon material and a preparation method thereof, and relates to the field of material preparation, and the monomer casting nylon material is applied to a high-temperature and oxygen-enriched environment and comprises the following components in parts by mass: 100 parts of caprolactam; 0.1-0.3 part of a catalyst which is one of sodium hydroxide, potassium hydroxide or lithium hydroxide; 0.5 to 1.5 parts of an activating agent, wherein the activating agent is N-acetyl caprolactam; 0.7 to 3 parts of a main antioxidant, wherein the main antioxidant comprises a hindered phenol antioxidant and a thioester antioxidant; 0.1-0.5 part of an auxiliary antioxidant, which is a metal deactivator; 1-3 parts of an inorganic filler which is modified montmorillonite; and 0.5-2 parts of a hydrophobic agent which is a silane coupling agent. By constructing a composite anti-oxidation system, multi-level synergistic protection can be formed for three key oxidation stages of free radical initiation, peroxide accumulation and metal catalysis, and a full path of an oxidation chain reaction is covered from a molecular level, so that the aging process of the material is remarkably delayed, and the service life of the material is prolonged. And high oxygen resistance and relatively long service life are provided for nylon application under severe working conditions.

An alcohol-resistant low-viscosity lubricating oil composition and the use thereof. The components of the lubricating oil composition include: 0.6-1.0% of a metal detergent, 6.0-10.0% of an ashless dispersant, 0.5-2.0% of an antioxidant anti-wear agent, 1.0-2.0% of a metal deactivator, 0.2-1.0% of an extreme-pressure anti-wear agent, 3.0-5.0% of a viscosity index improver, 0.1-0.2% of a pour point depressant, 0.001-0.010% of an anti-foaming agent, and 30.0-50.0% of a CTL base oil, the balance being an API group III base oil. The lubricating oil composition has good wear-resistant durability and low-temperature cold start performance.

The invention relates to the field of lubricating oil, and discloses a brake fluid composition as well as a preparation method and application thereof, the brake fluid composition comprises boric acid ester, polyol ether, an antioxidant, a corrosion inhibitor, a metal deactivator and a pH regulator; the mass ratio of the boric acid ester to the polyalcohol ether to the antioxidant to the corrosion inhibitor to the metal deactivator to the pH regulator is (30 to 90) to (4 to 60) to (0.05 to 3.5) to (0.05 to 2.5) to (0.05 to 1) to (0.2 to 5). The brake fluid composition disclosed by the invention has excellent high-temperature performance, lubricating performance, low-temperature performance, viscosity-temperature performance, corrosion resistance and rubber matching performance, provides good functions of energy transfer, lubrication, sealing, corrosion and rust prevention and heat dissipation for an overrun brake system, and meets the use requirements of a racing track vehicle brake system under severe conditions; and a guarantee is provided for reliable operation of a braking system.

The present invention provides a wind power gear oil composition with excellent anti-wear and durability, which comprises, by weight: 1.0-2.0 parts of extreme pressure anti-wear agent; 0.04-0.15 parts of metal deactivator; 0.3-0.8 parts of antioxidant; 0-0.05 parts of anti-foaming agent; 5-15 parts of ester oil; the balance is base oil. Beneficial effects of the present invention: The wind power gear oil composition with excellent anti-wear and durability provided by the present invention has good anti-wear and anti-wear durability performance, anti-oxidation, load-bearing, anti-corrosion, anti-rust, anti-foaming, and anti-emulsification performance, and is suitable for lubricating wind turbine gearboxes with strict requirements on anti-wear and durability performance.

The invention relates to the field of hydraulic oil complexing agents, in particular to an anti-wear hydraulic oil complexing agent with high water diversion performance and a preparation method thereof.The anti-wear hydraulic oil complexing agent is prepared from, by weight, 30-80 parts of zinc dialkyl dithiophosphate, 1-20 parts of phenolic ester type antioxidant, 1-10 parts of alkyl diphenylamine antioxidant and 1-10 parts of sulfurized calcium alkyl phenolate detergent. 5 to 50 parts of dinonyl naphthalene sulfonate antirust agent, 1 to 5 parts of azole metal deactivator and 0 to 20 parts of base oil. A hydraulic oil product prepared by the hydraulic oil complexing agent provided by the invention has excellent water diversion performance, and simultaneously meets the performance requirements of wear resistance, oxidation resistance, rust prevention and the like.

The embodiment of the application provides an insulating oil, a preparation method thereof and a power transformation equipment. The insulating oil comprises a composite vegetable ester base oil, a synthetic ester additive, a compounded antioxidant and a metal deactivator. The insulating oil has good electrical performance, oxidation stability and environmental protection performance, and can ensure safe and stable operation of the power transformation equipment.

The invention provides a cylinder oil composition suitable for a methanol fuel ship and a preparation method of the cylinder oil composition, and particularly relates to the technical field of lubricating oil. The cylinder oil composition suitable for the methanol fuel ship comprises the following components in percentage by mass: 5.0%-20% of a clearing agent, 1.0%-8.0% of an ashless dispersant, 0.5%-1.5% of a composite antioxidant, 0.5%-3% of an anti-wear agent, 0.01%-1% of a metal deactivator and the balance of base oil, the detergent is composed of high-base-number synthetic calcium sulfonate, low-base-number synthetic calcium sulfonate, high-base-number calcium boride sulfonate and high-base-number sulfurized calcium alkyl phenolate. According to the cylinder oil composition for the methanol fuel ship, the scheme of the purification dispersant is optimized, and a plurality of components such as the metal deactivator are introduced for combination, so that the obtained cylinder oil composition for the methanol fuel ship improves the wear resistance and the corrosion resistance of an oil product when the oil product is polluted by methanol and formic acid, and can meet the performance requirements when a marine two-stroke engine uses methanol fuel.

The invention relates to long-life turbine oil for an ammonia-resistant turboset and a preparation process of the long-life turbine oil. The complexing agent comprises an antioxidant, an anti-rust agent, an anti-wear reagent at extreme pressure, a metal deactivator, a demulsifier, an alkali-resistant stabilizer and base oil, the antioxidant comprises at least two of dinonyl diphenylamine, beta-(3, 5-di-tert-butyl-4-hydroxyphenyl) isooctyl propionate and dialkyl dithiocarbamate, the demulsifier comprises at least two of dialkyl dithiocarbamate, and the alkali-resistant stabilizer comprises at least two of dialkyl dithiocarbamate. The anti-wear reagent at extreme pressure comprises at least two of tricresyl phosphate, thiophosphate and amine salt derivatives thereof, and phosphate and amine salt derivatives thereof, and the alkali-resistant stabilizer comprises polycarboxylic polyether and aliphatic amines. The preparation method comprises the following steps: sequentially adding the components, heating, stirring, mixing at constant temperature, cooling and filtering.

The application provides a photovoltaic special dry vacuum pump lubricating oil and a photovoltaic special dry vacuum pump. The photovoltaic special dry vacuum pump lubricating oil comprises the following components in percentage by mass: 0.5-4% of an ionic liquid, 0.2-2% of an anti-wear agent, 0.01-0.5% of a metal deactivator, and the balance of base oil. The photovoltaic special dry vacuum pump lubricating oil has excellent corrosion resistance, rust resistance and extreme pressure and wear resistance.

The invention relates to the field of engine oil, in particular to long-life high-efficiency dynamic equilibrium air compressor oil and a preparation method thereof. The invention relates to long-life high-efficiency dynamic equilibrium air compressor oil, which is prepared from the following raw materials in parts by mass: 90 to 120 parts of base oil system, 1 to 2 parts of antioxidant, 2 to 6 parts of extreme pressure anti-wear agent, 0.3 to 0.6 part of metal deactivator, 0.5 to 1.5 parts of anti-rusting agent, 0.2 to 0.3 part of defoaming agent, 0.5 to 1.2 parts of purification dispersant and 3 to 8 parts of functional auxiliary agent. The finally prepared air compressor oil not only has the effects of long service life, high energy efficiency and the like, but also can keep comprehensive properties such as oxidation resistance, detergency and anti-foaming property at the same time so as to meet the increasing application requirements of air compressors.

The invention belongs to the technical field of diesel additives, and particularly provides a low-sulfur ash-free functional composite diesel anti-wear agent and a preparation method thereof. The functional composite diesel oil anti-wear agent comprises the following raw materials: 100 parts of soybean oleic acid, 4-8 parts of an emulsifier, 1-3 parts of an electrolyte, 0.5-1.5 parts of a lubricant, 0.2-0.5 part of a metal deactivator, 1-2 parts of a functional auxiliary agent and 200-300 parts of deionized water. The composite diesel oil anti-wear agent is excellent in anti-wear performance, has the functions of oxidation resistance, corrosion resistance and the like, and meets the higher requirements of modern low-sulfur diesel oil on the comprehensive performance of the additive.

The invention belongs to the field of lubricating oil, and particularly relates to a multi-gear gearbox lubricating oil composition as well as a preparation method and application thereof. The multi-gear gearbox lubricating oil composition is prepared from the following raw materials in percentage by mass: 2.0 percent to 4.5 percent of a viscosity index improver, 0.01 percent to 0.08 percent of a clearing agent, 4.5 percent to 7.0 percent of a dispersing agent, 0.3 percent to 1.0 percent of an anti-wear reagent at extreme pressure, 0.05 percent to 0.3 percent of an anti-rust agent, 0.3 percent to 1.5 percent of an antioxidant, 0.01 percent to 0.2 percent of a metal deactivator, 0.3 percent to 1.5 percent of a cross-linking agent, 0.01 percent to 0.03 percent of an anti-foaming agent and the balance of base oil. The cross-linking agent of the composition adopts trimethylolpropane tri (1H-imidazole-1-acetate), so that the wear resistance of an oil product is effectively enhanced, the friction coefficient is reduced, and the friction durability is improved, thereby achieving the effects of prolonging the endurance mileage and prolonging the service life of hardware.

The invention discloses a regenerated polypropylene composition as well as a preparation method and application thereof. The composition comprises regenerated polypropylene, polyamide resin, a chain extender, an initiator, a metal deactivator, a nano nucleating agent, a halogen-free flame retardant, glass fibers, a flexibilizer, a styrene-glycidyl methacrylate copolymer, a lubricant, an antioxidant, a light stabilizer and the like. The molecular chain structure is repaired by the chain extender containing at least two epoxy groups, the interface compatibility is improved by matching with the reactive compatibilizer, and crystallization is induced by the nano nucleating agent, so that the mechanical property, the thermal stability and the flame retardant property of the regenerated polypropylene are remarkably improved. The material has excellent tensile strength, impact toughness, heat aging resistance and flame retardant grade, meets the requirements of robot cable protective sleeve materials, and is beneficial to widening the application range of regenerated polypropylene.

The invention discloses a gearbox lubricating composition for a high-speed motor train unit and a preparation method of the gearbox lubricating composition. The gearbox lubricating composition comprises the following components in parts by weight: 2.0-6.0 parts of an anti-scratch agent; 0.8 to 3.8 parts of an anti-wear reagent at extreme pressure; 0.5 to 2.8 parts of an antifriction additive; 0.1 to 0.5 part of an oxidation and corrosion inhibitor; 0.1 to 0.2 part of a metal deactivator; 0.05 to 0.25 part of an antirust agent; 0.01 to 0.06 part of an anti-foaming agent; 1-7 parts of a viscosity index improver; 4 to 16 parts of ester oil; 1 to 9 parts of HVIS150BS; and the balance of PAO6 and PAO40. The lubricating composition for the gearbox of the high-speed motor train unit has good scratch resistance, wear resistance, load bearing, friction reduction, corrosion resistance, rust prevention, foam resistance and thermal oxidation stability, especially has excellent temperature rise inhibition capability, and is suitable for lubricating the gearbox of the motor train unit with the speed of 450 kilometers per hour.

The invention discloses a groove edge additive of universal rolling oil and a preparation method of the groove edge additive, and belongs to the technical field of groove edge additives, the groove edge additive of the universal rolling oil is prepared from the following raw materials in parts by weight: base oil, organic amine, an oiliness agent, a dispersing agent, an antirust agent and a metal deactivator; the organic amine is a mixture of polymer type polyimine organic amine and aliphatic micromolecule polyamine. The weight part ratio of the polymer type polyimine organic amine to the aliphatic micromolecule polyamine is 1: (1-2). The high-molecular-weight polymer type polyimine organic amine and the low-molecular-weight aliphatic micromolecular polyamine are selected to be compounded for use to neutralize iron soap generated in the rolling oil, so that the neutralization efficiency of the iron soap can be enhanced, the decolorization effect of the rolling oil can be improved, the universality of the groove edge additive can be improved, and the service life of the groove edge additive can be prolonged. Therefore, different types of rolling oil can be adapted.

The invention discloses an efficient anti-attrition lubricating and cooling multifunctional complexing agent for a lubricating system of an internal combustion engine, which is prepared from the following raw materials in parts by weight: base oil, a purification dispersant, a zinc butyl octyl dithiophosphate oxidation and corrosion inhibitor, a molybdenum butyl octyl dithiophosphate friction modifier, a trivar energy-gathered lubricating oil modifier, heat-conducting oil, a graphene additive, an extreme pressure anti-wear agent and an oiliness agent. The invention relates to the technical field of internal combustion engine cooling, the added heat conduction oil enables the complexing agent to have efficient heat conduction performance, low operation pressure and a wide working temperature range, and in cooperation with complementation of the trivar energy-gathered lubricating oil improver and the graphene additive, the complexing agent has the advantages that the complexing agent is more efficient in heat conduction performance, lower in operation pressure and wider in working temperature range; and when the graphene interacts with heat generated when the internal combustion engine works, part of heat energy on the internal combustion engine can be taken away, the temperature is further reduced, and cooling and lubricating of the internal combustion engine are achieved.

The invention provides a lubricating anti-corrosion composition and application thereof in the aviation field. The composition comprises the following components in percentage by weight: 73-95% of base oil; more than 0 wt% and less than or equal to 10 wt% of a corrosion inhibitor; 0 to 10 wt% of a viscosity index improver; 0-1 wt% of an antiwear agent; 0-1 wt% of a film forming agent; more than 0 wt% and less than or equal to 1 wt% of an antioxidant; more than 0 wt% and less than or equal to 1 wt% of a metal deactivator; 0-2% by weight of a dehydrating agent; 0-1 wt% of a dispersant; and 0 to 0.1 wt% of an antifoaming agent. The lubricating anti-corrosion composition developed by the invention is suitable for providing lubricating and anti-corrosion functions for various equipment operating under a low-temperature condition, has long-term, efficient and reliable lubricating and anti-corrosion protection for the equipment, and has the advantages of high flash point, excellent low-temperature fluidity and the like.

The invention relates to the technical field of lubricating oil, in particular to an immersed cooling medium and a preparation method and application thereof. The immersed cooling medium comprises the following components in percentage by weight: 70-80% of mineral oil; 10-20% of a flame retardant; 2-5% of an antioxidant; 0.5-2% of a metal deactivator; 0.5 to 2% of a surfactant; and 0.5-2% of an anti-foaming agent. The immersed cooling medium provided by the invention has the advantages of fast heat conduction and no combustion, and can improve the safety, reduce the component failure rate of the energy storage system and reduce the pollution to the air when being used in the energy storage system.

The invention discloses oil gas lubricating oil applied to a cold rolling mill, which belongs to the technical field of lubricating oil and comprises the following components in percentage by weight: 45%-52% of synthetic ester, 4%-8% of an emulsifier compound, 1.5%-4% of a phosphide anti-wear agent compound, 7.5%-15% of a sulfide extreme pressure antifriction agent compound, 0.75%-1.25% of a metal deactivator, 0.25%-0.75% of an antirust agent and 20%-40% of mineral base oil. The invention also discloses a preparation method of the oil gas lubricating oil applied to the cold rolling mill, compared with the prior art, the oil gas lubricating oil has excellent lubricity and top-level thermal stability and oxidation stability, and meanwhile, the selected synthetic ester has the characteristics of being harmless to human bodies and environment-friendly, and has good biodegradability and low toxicity.

The present invention relates to a mixed virgin polyethylene / recycled polyethylene composition having a melt flow rate MFR2 (ISO 1133:2022, 2.16 kg, 190 °C) in the range of from 0.10 to less than 1.00 g / 10 min and a density (ISO 1183-1:2019) in the range of from 946 to 980 kg / m3, the composition comprising A) a recycled polyethylene fraction (rPE), wherein the recycled polyethylene fraction is present in an amount of 40 wt.-% or more, based on the total weight of the mixed virgin polyethylene / recycled polyethylene composition, and wherein the recycled polyethylene fraction (rPE) has a content of titanium (Ti) of from 500 to 5,000 ppm, determined by X-ray fluorescence (XRF) spectroscopy as described herein and based on the total weight of the recycled polyethylene fraction (rPE), B) a virgin polyethylene fraction comprising at least a first virgin polyethylene component (vPE1), C) at least 0.3 wt.-% of one or more pigment(s), preferably carbon black (CB), and D) one or more metal deactivator(s), wherein the mixed virgin polyethylene / recycled polyethylene composition has, as determined by quantitative 13C{1H} NMR spectroscopy as described herein: a) a total amount of ethylene units (C2 units) of at least 90.0 wt.-%, and b) a total amount of continuous propylene units (C3 units) in the range of from 0.1 to 5.0 wt.-%. The present invention further relates to a method of preparing the mixed virgin polyethylene / recycled polyethylene composition, an article comprising the same and the use of the mixed virgin polyethylene / recycled polyethylene composition for wire and / or cable jacketing applications.

The invention discloses an environment-friendly metal deactivator and a preparation method thereof, and relates to the field of petrochemical engineering, and the environment-friendly metal deactivator comprises the following raw materials in parts by weight: 10-15 parts of modified nano magnesium oxide, 10-12 parts of citric acid, 20-25 parts of calcium nitrate and 350-450 parts of water. The modified nano magnesium oxide has strong hydrothermal stability, strong affinity with an FCC catalyst, strong capability of passivating heavy metals nickel and vanadium, effective inhibition of FCC catalyst poisoning, and high environmental protection property.

The invention belongs to the technical field of lubricating oil and lubricating oil additives, and particularly relates to a mining machinery gear lubricating oil composition as well as a preparation method and application thereof. The lubricating oil composition is prepared from the following raw materials in percentage by mass: 0.1%-1% of a sulfur-containing extreme pressure agent, 0.3%-2.5% of a phosphorus-containing anti-wear agent, 0.2%-1.5% of an antioxidant, 0.03%-0.1% of a metal deactivator, 0.02%-0.08% of an anti-rust agent, 0.02%-0.05% of a composite anti-foaming agent, 0.003%-0.01% of a demulsifier, 0.01%-0.1% of a pour point depressant and the balance of base oil. The special gear oil composition for mines has outstanding high foam inhibition characteristic, excellent extreme pressure wear resistance and corrosion resistance, and excellent low-temperature fluidity and viscosity-temperature characteristic.

The invention discloses a lubricating oil high-temperature antioxidant additive package and application thereof, and belongs to the technical field of lubricating oil, the antioxidant additive package is composed of an amine antioxidant, a phenol antioxidant, a heterocyclic antioxidant, a self-made high-temperature antioxidant, a metal deactivator and a solvent. The self-made high-temperature antioxidant has excellent high-temperature oxidation resistance, is better than a phenol antioxidant in high-temperature oxidation resistance, is better than a traditional amine antioxidant in dispersity and less in oil sludge, is smaller than a heterocyclic antioxidant in corrosion to equipment, and has higher oxidation performance and less oil sludge compared with thiophenazine; through reasonable compounding of various antioxidants, the oil product has better high-temperature oxidation resistance, extreme pressure wear resistance and corrosion resistance, lower high-temperature evaporation loss and longer service life.

The invention provides a lubricating oil composition for a gearbox of an electric vehicle and a preparation method of the lubricating oil composition. The electric vehicle transmission lubricating oil composition comprises the following components: (A) a tetraphenyl ethylene derivative accounting for 0.1%-3.0% of the total mass of the composition; (B) an ashless dispersant accounting for 1.0%-5.0% of the total mass of the composition; (C) a viscosity index improver accounting for 0.5%-5.0% of the total mass of the composition; (D) an extreme pressure anti-wear agent accounting for 0.2%-2.0% of the total mass of the composition; (E) a metal deactivator accounting for 0.01%-0.3% of the total mass of the composition; and (F) a lubricant base oil which constitutes the main component of the composition. The lubricating oil composition for the gearbox of the electric vehicle has excellent thermal oxidation stability and corrosion resistance, and the service life of the lubricating oil composition can be predicted.

The present invention relates to a flame-retardant multilayer tubular structure for the cooling of electric vehicle batteries or of stationary energy storage system batteries, comprising at least two layers: an inner layer (I) comprising at least 40% of at least one thermoplastic polymer P1 chosen from a polyolefin and a thermoplastic elastomer and up to 5% by weight of a compound chosen from a heat stabilizer and a metal deactivator or a mixture of these, an outer layer (II) comprising a composition based on at least one predominant polyamide, said composition comprising, by weight: a) at least 50% of at least one polyamide, b) from 15% to 38% of at least one flame retardant, c) from 4% to 20%, in particular 4% to 15%, of a polyolefin, d) from 0% to 10%, in particular from 0.1% to 10%, by weight of at least one plasticizer, e) from 0% to 5%, in particular from 0.1% to 5%, of at least one additive, the sum a)+b)+c)+d)+e) being equal to 100%.

The invention relates to the technical field of preparation of refrigerating machine oil compositions, in particular to a mineral oil type refrigerating machine oil composition for R290 refrigerants and a preparation method of the mineral oil type refrigerating machine oil composition, the mineral oil type refrigerating machine oil composition comprises base oil and additives, the base oil is composed of naphthenic base mineral oil and paraffin base mineral oil, and the additives are one or more of an anti-wear agent, an antioxidant, a metal deactivator and an anti-foaming agent. According to the mineral oil type refrigerating machine oil composition for the R290 refrigerant, the base oil composed of the cycloalkyl mineral oil and the paraffin-based mineral oil which are produced through high-pressure hydrogenation is mainly used as the main raw material, the anti-wear agent, the antioxidant, the metal deactivator and the anti-foaming agent are compounded, the performance of the mineral oil type refrigerating machine oil composition for the R290 refrigerant is greatly improved, and the mineral oil type refrigerating machine oil composition for the R290 refrigerant is moderate in viscosity and high in stability. The low-temperature performance is good, and the lubricating property, the wear resistance and the oxidation stability are better.

The application discloses a railway speed bump super-low-temperature special oil composition and a preparation method thereof. The railway speed bump super-low-temperature special oil composition comprises the following components in parts by mass: a viscosity index improver 11-20 parts; a metal deactivator 0.03-0.1 part; an antirust agent 0.03-0.1 part; an antioxidant 0.2-1.0 part; an antiwear agent 0.01-0.1 part; a pour point depressant 0.2-1.0 part; an antifoaming agent 0.01-0.05 part; and base oil 77.65-88.52 parts. The railway speed bump super-low-temperature special oil composition has excellent oxidation resistance, wear resistance and rust resistance, especially has super-high viscosity index (greater than 340) and excellent low-temperature flow performance, can guarantee smooth operation of the speed bump under extreme low-temperature conditions (-40 DEG C), can meet the requirements of extremely harsh working conditions, and the oil product can pass all requirements of OEM quality indexes.