CN111607453A - Synthetic lubricating oil with stable storage performance and preparation method thereof - Google Patents

Synthetic lubricating oil with stable storage performance and preparation method thereof Download PDF

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Publication number
CN111607453A
CN111607453A CN202010443321.4A CN202010443321A CN111607453A CN 111607453 A CN111607453 A CN 111607453A CN 202010443321 A CN202010443321 A CN 202010443321A CN 111607453 A CN111607453 A CN 111607453A
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China
Prior art keywords
oil
antiwear agent
lubricating oil
synthetic lubricating
viscosity
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Pending
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CN202010443321.4A
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Chinese (zh)
Inventor
夏冰
理宁
夏志学
郭相飞
姚静
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Kaifeng Synthetic Times Lubrication Technology Co ltd
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Kaifeng Synthetic Times Lubrication Technology Co ltd
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Priority to CN202010443321.4A priority Critical patent/CN111607453A/en
Publication of CN111607453A publication Critical patent/CN111607453A/en
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
    • C10M169/048—Mixtures of base-materials and additives the additives being a mixture of compounds of unknown or incompletely defined constitution, non-macromolecular and macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/06—Metal compounds
    • C10M2201/065—Sulfides; Selenides; Tellurides
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/06—Metal compounds
    • C10M2201/065—Sulfides; Selenides; Tellurides
    • C10M2201/066—Molybdenum sulfide
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
    • C10M2205/022—Ethene
    • C10M2205/0225—Ethene used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/2805—Esters used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2213/06—Perfluoro polymers
    • C10M2213/062—Polytetrafluoroethylene [PTFE]
    • C10M2213/0626—Polytetrafluoroethylene [PTFE] used as thickening agents
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/14—Containing carbon-to-nitrogen double bounds, e.g. guanidines, hydrazones, semicarbazones
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/22—Heterocyclic nitrogen compounds
    • C10M2215/221—Six-membered rings containing nitrogen and carbon only
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
    • C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
    • C10M2229/02—Unspecified siloxanes; Silicones
    • C10M2229/025—Unspecified siloxanes; Silicones used as base material

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)

Abstract

The invention discloses synthetic lubricating oil with stable storage performance and a preparation method thereof, belonging to the technical field of synthetic lubricating oil. The synthetic lubricating oil with stable storage performance is mainly prepared from the following raw materials in parts by weight: 470 portions of base oil, 610 portions of viscosity modifier, 30 to 40 portions of antiwear agent, and 1.5 to 2.5 portions of metal passivator. The synthetic lubricating oil with stable storage performance has high oxidation stability, can still maintain good performance after long-term storage at normal temperature, is suitable for large-scale production, storage and transportation, can maintain proper viscosity under the conditions of high temperature and low temperature, has good antifreezing performance, wider temperature application range and strong environmental adaptability, can maintain good fluidity during high-temperature or low-temperature storage, and is convenient for transfer and transportation. The synthetic lubricating oil with stable storage performance also has excellent antiwear performance.

Description

Synthetic lubricating oil with stable storage performance and preparation method thereof
Technical Field
The invention relates to the technical field of synthetic lubricating oil, in particular to synthetic lubricating oil with stable storage performance and a preparation method thereof.
Background
With the development of energy industry, the economic requirement on vehicle fuel oil is higher and higher, and the corresponding fuel economy requirement on vehicle engine lubricating oil is also higher and higher. The current lubricating oil for internal combustion engines for vehicles needs to have good high and low temperature performance, good oxidation stability and corrosion stability and higher viscosity index, and particularly requires that the oil has higher viscosity index and good low temperature fluidity, and can maintain good fluidity in winter, and can maintain enough viscosity at higher operating temperature.
The Chinese invention patent with application publication number CN108587727A discloses a vehicle lubricating oil, which comprises base oil and an additive; the base oil is mainly prepared from the following raw materials in parts by weight: 3-35 parts of high viscosity index PAO, 15-75 parts of low viscosity index PAO and 5-15 parts of polyol ester; the viscosity index of the high viscosity index PAO is 170-250; the low viscosity index PAO viscosity index is 100-. The high viscosity PAO may be a PAO obtained by polymerization of decene as a monomer. The polyol ester is polyol ester 3970 and/or polyol ester TMTC. The base oil of the vehicle lubricating oil adopts high-viscosity PAO oil and low-viscosity PAO oil in a matching way, and has high viscosity index and strong adaptability. However, the vehicle lubricating oil contains many kinds of additives in the raw material, and the stability of the oil product is easily affected during long-term storage.
Disclosure of Invention
In view of the disadvantages of the prior art, the first object of the present invention is to provide a synthetic lubricating oil with stable storage properties, which has very good oxidation stability and good storage stability.
The second purpose of the invention is to provide a preparation method of synthetic lubricating oil with stable storage performance, the preparation method has simple process, and the prepared synthetic lubricating oil is uniform and stable.
In order to achieve the first object, the invention provides the following technical scheme:
a synthetic lubricating oil with stable storage performance is mainly prepared from the following raw materials in parts by weight: 470 portions of base oil, 610 portions of viscosity modifier, 30 to 40 portions of antiwear agent, and 1.5 to 2.5 portions of metal passivator.
By adopting the technical scheme, the synthetic lubricating oil disclosed by the invention adopts a large amount of viscosity regulator, and the regulation effect of the viscosity regulator is utilized, so that the correlation between the viscosity and the temperature of the lubricating oil is greatly reduced, the lubricating oil can keep proper viscosity under the conditions of high temperature and low temperature, the anti-freezing performance is good, the temperature application range is wider, and the environmental adaptability is strong. The synthetic lubricating oil disclosed by the invention can realize good anti-wear performance only by virtue of an anti-wear agent and a metal passivator without adding an antioxidant, has good oxidation stability, and is very stable even if stored for a long time.
The invention is further configured to: the synthetic lubricating oil with stable storage performance is mainly prepared from the following raw materials in parts by weight: 550 parts of base oil 490-one, 33-40 parts of viscosity modifier, 3.5-5.5 parts of antiwear agent and 1.8-2.5 parts of metal passivator.
By adopting the technical scheme, the proportion of each raw material is further optimized, the proportion of the viscosity regulator and the antiwear agent is correspondingly improved, the viscosity adaptability of the lubricating oil is further improved, and the antiwear performance of the lubricating oil is improved.
The invention is further configured to: the base oil comprises at least one of PAO oil, ester oil and fluorosilicone oil.
By adopting the technical scheme, the base oil can adopt one or a combination of more of PAO oil, ester oil and fluorosilicone oil, wherein the PAO oil has the advantages of excellent low-temperature performance, good thermal stability, excellent load resistance, good storage performance and low cost, and can be used in lubricating oil in large quantity. The ester oil has good low-temperature performance, good load resistance and excellent storage performance, but has slightly low thermal stability and poor flame resistance, and can be used as a supplement of PAO oil. The fluorocarbon silicone oil has good low-temperature performance and thermal stability, but has poor flame resistance, poor load resistance and higher cost, and can also be used as supplement of PAO oil. When several base oils are used in combination, the base oils can complement each other, and the comprehensive performance of the lubricating oil is improved.
The invention is further configured to: the metal passivator is at least one of N, N-disalicylidene-1, 2-diaminoethane, N, N-disalicylidene-1, 2-propyldiamine, N, N-disalicylidene-1, 2-butyldiamine, 8-cyanoquinoline, and dithiooxamide.
By adopting the technical scheme, the oil product is prevented from being oxidized because more antioxidants are usually added into the conventional synthetic lubricating oil, but the antioxidants cannot prevent the catalytic oxidation of metals and have limited anti-oxidation effect on the oil product in the actual experiment and application process. The metal passivator can inhibit the metal and the metal compound from generating catalytic action on the oxidation of the oil product, thereby preventing or weakening the oxidation of the oil product. The metal passivator added in the invention can not only prevent oil products from being oxidized, but also improve the stability of the oil products and prolong the storage period of lubricating oil. Moreover, compared with the antioxidant, the metal deactivator can play a good role in preventing oxidation under the condition of small addition amount.
The invention is further configured to: the metal passivator comprises N, N-disalicylidene-1, 2-diaminoethane, N, N-disalicylidene-1, 2-propyldiamine, N, N-disalicylidene-1, 2-butyldiamine and dithiooxamide in a weight ratio of 1: 1-3.
By adopting the technical scheme, dithiooxamide is taken as a necessary component of the metal passivator, so that the sufficient inhibition effect of the metal passivator on metal catalytic oxidation is ensured, and meanwhile, the aromatic acyl metal passivator is added, so that the oil solubility of the metal passivator in an oil product is improved, a chelate is conveniently and sufficiently formed with metal ions, and the inhibition effect on the catalytic oxidation of the oil product is obvious; and the gum generation amount can be reduced, and the storage period of the oil product is prolonged.
The invention is further configured to: the antiwear agent is at least one of a sulfur-containing antiwear agent, a phosphorus-containing antiwear agent, a chlorine-containing antiwear agent and a boron-containing antiwear agent.
By adopting the technical scheme, because the adding amount of the antiwear agent in the synthetic lubricating oil is large, the antiwear property of the lubricating oil can be greatly improved by adding each antiwear agent. The sulfur-containing antiwear agent has good adsorption performance on the metal surface, can quickly break an oil film during friction strengthening, and can be combined with the metal surface to form a sulfur-containing film so as to improve the antiwear stability. The phosphorus-containing antiwear agent can form an inorganic phosphorus-containing film with the metal surface to realize a better antiwear effect, and part of the inorganic phosphorus-containing film can be further hydrolyzed to improve the extreme pressure antiwear effect. Most chlorine-containing antiwear agents can be decomposed on the surface of metal to form a corresponding film structure, but the stability of the film structure is poor, and the chlorine-containing antiwear agents are required to be matched with other types of antiwear agents for use. The antiwear mechanism of the boron-containing antiwear agent is different from that of other antiwear agents, the boron-containing antiwear agent does not react with metal under extreme pressure conditions, impact load is borne by borate, the thermal stability of the boron-containing antiwear agent is very good, and the applicable conditions are wider.
The invention is further configured to: the antiwear agent is formed by mixing at least one of a phosphorus-containing antiwear agent, a chlorine-containing antiwear agent and a boron-containing antiwear agent with a sulfur-containing antiwear agent in a mass ratio of 1-2: 4-6.
By adopting the technical scheme, the sulfur-containing antiwear agent is adopted as the main antiwear agent, the sulfur-containing antiwear agent is ensured to be larger in amount, and then other antiwear agents are used for assistance, so that a composite antiwear agent with good comprehensive antiwear property is formed, a good antiwear effect can be achieved under different working conditions, and the comprehensive performance of the lubricating oil is further improved.
The invention is further configured to: the sulfur-containing antiwear agent is any one of molybdenum disulfide and tungsten disulfide.
By adopting the technical scheme, the sulfur-containing antiwear agent adopts disulfide, an adsorption film with good abrasion resistance can be formed on the metal surface and is uniformly adsorbed on the metal surface, and the abrasion resistance stability of the lubricating oil is further improved.
In order to achieve the second object, the invention provides the following technical scheme:
the preparation method of the synthetic lubricating oil with stable storage performance comprises the following steps:
1) mixing the antiwear agent and part of base oil uniformly to prepare an antiwear agent mixed solution;
uniformly mixing the antiwear agent mixed solution with the rest base oil to obtain premixed oil;
2) and (3) uniformly mixing the premixed oil with a viscosity regulator and a metal passivator to obtain the metal passivator.
By adopting the technical scheme, because the amount of the antiwear agent in the raw materials of the synthetic lubricating oil is larger, when the raw materials are mixed, the antiwear agent is firstly dispersed by adopting part of the base oil to obtain the mixed liquid of the antiwear agent, and then the mixed liquid is mixed with the base oil, so that the uniform dispersion degree of the antiwear agent in the base oil is greatly improved, and the antiwear performance of the synthetic lubricating oil is further improved.
The invention is further configured to: in the step 2), the temperature for uniformly mixing the premixed oil, the viscosity regulator and the metal passivator is 50-65 ℃.
By adopting the technical scheme, when the premixed oil is mixed with the viscosity regulator and the metal passivator, the adopted temperature is moderate, so that the fluidity of the base oil is ensured, and the decomposition of partial components in the metal passivator due to the influence of temperature is avoided.
In conclusion, the invention has the following beneficial effects:
first, the synthetic lubricating oil with stable storage performance of the present invention has high oxidation stability, can maintain good performance after long-term storage at normal temperature, has few types of additives, is not deteriorated by environmental influences during long-term storage, and is suitable for mass production, storage and transportation. In addition, the synthetic lubricating oil with stable storage performance has higher viscosity index, can keep good fluidity at high temperature and low temperature, and is convenient to store and transport.
Secondly, the synthetic lubricating oil with stable storage performance has excellent anti-wear performance, and when mechanical equipment such as an engine and the like is in a working state, the lubricating oil is in a boundary lubrication state and cannot form a flowing oil film, so that the influence of viscosity on the lubrication effect is weakened, and the important factor influencing the lubrication effect is whether the lubricating oil can form a firm oil film on the metal surface. The synthetic lubricating oil can form a firm compound film on the metal surface to generate a smooth surface, and the abrasion resistance of the lubricating oil is greatly improved.
Detailed Description
The present invention will be described in further detail with reference to examples.
The synthetic lubricating oil with stable storage performance is prepared from the following raw materials in parts by weight: 470 portions of base oil, 610 portions of viscosity modifier, 30 to 40 portions of antiwear agent, and 1.5 to 2.5 portions of metal passivator.
Wherein the base oil comprises at least one of PAO oil, ester oil and fluorosilicone oil. The PAO oil can be high-viscosity PAO oil and low-viscosity PAO oil, the viscosity index of the high-viscosity PAO oil is 200-250, and the viscosity index of the low-viscosity PAO oil is 120-140.
The ester oil is at least one of pentaerythritol oleate, dipentaerythritol ester, trimethylolpropane oleate and trimethylolpropane cocoate oleate. Wherein the viscosity of the pentaerythritol oleate at 40 ℃ is not less than 70mm2And s. The viscosity index of the dipentaerythritol ester is 90, and the viscosity at 40 ℃ is 235mm2And/s, acid value not more than 0.2. Trimethylolpropane oleate has a viscosity index of 180. Viscosity at 40 deg.C of not less than 50mm2And/s, an acid value of not more than 1 mgKOH/g. Trimethylolpropane cocoate at 40 ℃ viscosity of 40mm2/s。
The fluorosilicone oil is at least one of trifluoropropyl silicone oil and 3, 5-bis (trifluoromethyl) phenyl methyl silicone oil. The molecular weight of the fluorosilicone oil is about 20 ten thousand.
Further preferably, the base oil is composed of PAO oil and ester oil mixed according to the mass ratio of 250-280: 200-220.
Further preferably, the base oil is formed by mixing PAO oil, ester oil and fluorosilicone oil according to the mass ratio of 250-280:100-120: 120-150.
The viscosity regulator is at least one of polytetrafluoroethylene, melamine and polydicyclopentadiene. Preferably, the viscosity regulator is formed by mixing at least one of melamine and polydicyclopentadiene and polytetrafluoroethylene according to the mass ratio of 1: 4-5.
The antiwear agent is at least one of a sulfur-containing antiwear agent, a phosphorus-containing antiwear agent, a chlorine-containing antiwear agent and a boron-containing antiwear agent. The sulfur-containing antiwear agent is any one of molybdenum disulfide and tungsten disulfide. The phosphorus-containing antiwear agent is any one of tricresyl phosphate, zinc dialkyl dithiophosphate and bismuth dialkyl disulfide phosphate. The chlorine-containing antiwear agent is any one of chlorinated paraffin and hexachlorocyclopentadiene. The boron-containing antiwear agent is any one of potassium metaborate and potassium triborate.
Preferably, the antiwear agent is formed by mixing at least one of a phosphorus-containing antiwear agent, a chlorine-containing antiwear agent and a boron-containing antiwear agent with a sulfur-containing antiwear agent in a mass ratio of 1-2: 4-6. More preferably, the antiwear agent is formed by mixing a phosphorus-containing antiwear agent, a boron-containing antiwear agent and a sulfur-containing antiwear agent in a mass ratio of 0.3-0.8:0.7-1.5: 4-6.
Preferably, the metal deactivator is composed of dithiooxamide and any one of N, N-disalicylidene-1, 2-diaminoethane, N, N-disalicylidene-1, 2-propyldiamine, and N, N-disalicylidene-1, 2-butyldiamine in a weight ratio of 1: 1-3. Further preferably, the weight ratio is 1: 2-3.
One or more of pour point depressant, dispersant, defoaming agent and tranquilizer can also be added into the raw materials of the synthetic lubricating oil with stable storage performance, and the addition amount is less and is added according to the mode in the prior art, so the details are not repeated.
The preparation method of the synthetic lubricating oil with stable storage performance comprises the following steps: 1) mixing the antiwear agent and part of base oil uniformly to prepare an antiwear agent mixed solution; uniformly mixing the antiwear agent mixed solution with the rest base oil to obtain premixed oil; 2) and (3) uniformly mixing the premixed oil with a viscosity regulator and a metal passivator to obtain the metal passivator.
The step 1) of uniformly mixing the antiwear agent and the base oil is to mix the antiwear agent and the base oil and stir for 10-20 min. The step of uniformly mixing the antiwear agent mixed solution and the base oil is to mix the antiwear agent mixed solution and the mixed base oil and stir the mixture for 10 to 15min at the temperature of between 50 and 65 ℃. When the base oil is composed of more than two of PAO oil, ester oil and fluorosilicone oil, the base oil is uniformly mixed to obtain mixed base oil, and the antiwear agent mixed solution and the mixed base oil are uniformly mixed. Mixing the base oil uniformly is mixing the base oil and stirring at 40-60 deg.C for 30-40 min. When the base oil consists of the PAO oil and at least one of ester oil and fluorosilicone oil, the base oil mixed with the antiwear agent is a part of the PAO oil. And the mixed base oil is formed by uniformly mixing at least one of ester oil and fluorosilicone oil with the rest of PAO oil.
The step 2) of uniformly mixing the premixed oil with the viscosity regulator and the metal passivator is to add the viscosity regulator and the metal passivator into the premixed oil and stir the premixed oil at 50-65 ℃ for 15-25 min.
Example 1
The synthetic lubricating oil with stable storage performance of the embodiment is prepared from the following raw materials in parts by weight: 250.0kg of PAO oil, 220.0kg of ester oil, 30.0kg of viscosity modifier, 3.0kg of antiwear agent and 1.5kg of metal passivator.
Wherein the PAO oil is a low viscosity polyalphaolefin PAO base oil with a viscosity index of 125(PAO 12). The ester oil was trimethylolpropane oleate with a viscosity index of 180. The viscosity regulator is polytetrafluoroethylene. The antiwear agent is molybdenum disulfide. The metal deactivator is dithiooxamide.
The method for preparing the synthetic lubricating oil with stable storage performance of the embodiment comprises the following steps:
1) adding 80kg of PAO oil into a stirrer, then adding an antiwear agent, and stirring for 10min to obtain an antiwear agent mixed solution;
adding the rest PAO oil and ester oil into a blending kettle, and stirring at 50 ℃ for 40min to obtain mixed base oil;
2) adding the mixed solution of the antiwear agent into the mixed base oil, stirring for 10min at 65 ℃, adding the viscosity regulator and the metal passivator, and stirring for 20min at 60 ℃ to obtain the antiwear oil.
Example 2
The synthetic lubricating oil with stable storage performance of the embodiment is prepared from the following raw materials in parts by weight: 280.0kg of PAO oil, 120.0kg of ester oil, 120.0kg of fluorosilicone oil, 35.0kg of viscosity regulator, 5.1kg of antiwear agent and 2.0kg of metal passivator.
Wherein the PAO oil is high viscosity polyalphaolefin PAO base oil, and the viscosity index is 204 (PAO-100). The ester oil was trimethylolpropane oleate with a viscosity index of 180. The fluorosilicone oil is trifluoropropyl silicone oil. The viscosity regulator is polytetrafluoroethylene. The antiwear agent is obtained by mixing hexachlorocyclopentadiene and tungsten disulfide in a mass ratio of 1: 6. The metal passivator is 8-cyanoquinoline.
The method for preparing the synthetic lubricating oil with stable storage performance of the embodiment comprises the following steps:
1) adding 100kg of PAO oil into a stirrer, then adding an antiwear agent, and stirring for 20min to obtain an antiwear agent mixed solution;
adding the rest PAO oil, ester oil and fluorosilicone oil into a blending kettle, and stirring for 30min at 60 ℃ to obtain mixed base oil;
2) adding the mixed solution of the antiwear agent into the mixed base oil, stirring for 15min at 50 ℃, adding the viscosity regulator and the metal passivator, and stirring for 25min at 50 ℃ to obtain the antiwear oil.
Example 3
The synthetic lubricating oil with stable storage performance of the embodiment is prepared from the following raw materials in parts by weight: 275.0kg of PAO oil, 105.0kg of ester oil, 135.0kg of fluorosilicone oil, 40.0kg of viscosity regulator, 4.6kg of antiwear agent and 2.2kg of metal passivator.
Wherein the PAO oil is high viscosity polyalphaolefin PAO base oil, and the viscosity index is 204 (PAO-100). The ester oil was pentaerythritol oleate with a viscosity index of 180. The fluorosilicone oil is 3, 5-bis (trifluoromethyl) phenyl methyl silicone oil. The viscosity modifier is melamine. The antiwear agent is prepared by mixing zinc dialkyl dithiophosphate, potassium triborate and molybdenum disulfide according to the mass ratio of 0.5:1: 4. The metal passivator is N, N-disalicylidene-1, 2-diaminoethane.
The method for preparing the synthetic lubricating oil with stable storage performance of the embodiment comprises the following steps:
1) adding 100kg of PAO oil into a stirrer, then adding an antiwear agent, and stirring for 15min to obtain an antiwear agent mixed solution;
adding the rest PAO oil, ester oil and fluorosilicone oil into a blending kettle, and stirring at 40 ℃ for 40min to obtain mixed base oil;
2) adding the mixed solution of the antiwear agent into the mixed base oil, stirring for 12min at 55 ℃, adding the viscosity regulator and the metal passivator, and stirring for 15min at 65 ℃ to obtain the antiwear oil.
Example 4
The synthetic lubricating oil with stable storage performance of the embodiment is prepared from the following raw materials in parts by weight: 280.0kg of PAO oil, 115.0kg of ester oil, 140.0kg of fluorosilicone oil, 36.0kg of viscosity modifier, 3.8kg of antiwear agent and 2.6kg of metal passivator.
Wherein the PAO oil is high viscosity polyalphaolefin PAO base oil, and the viscosity index is 204 (PAO-100). The ester oil was trimethylolpropane cocoate. The fluorosilicone oil is 3, 5-bis (trifluoromethyl) phenyl methyl silicone oil. The viscosity regulator is polytetrafluoroethylene. The antiwear agent is prepared by mixing tricresyl phosphate, potassium metaborate and molybdenum disulfide according to the mass ratio of 0.3:1.5: 6. The metal passivator consists of N, N-disalicylidene-1, 2-propyl diamine and dithiooxamide in a mass ratio of 1: 3.
The method for preparing the synthetic lubricating oil with stable storage performance of the embodiment comprises the following steps:
1) adding 100kg of PAO oil into a stirrer, then adding an antiwear agent, and stirring for 18min to obtain an antiwear agent mixed solution;
adding the rest PAO oil, ester oil and fluorosilicone oil into a blending kettle, and stirring at 55 ℃ for 35min to obtain mixed base oil;
2) adding the mixed solution of the antiwear agent into the mixed base oil, stirring for 12min at 55 ℃, adding the viscosity regulator and the metal passivator, and stirring for 20min at 60 ℃ to obtain the antiwear oil.
Example 5
The synthetic lubricating oil with stable storage performance of the embodiment is prepared from the following raw materials in parts by weight: 272.0kg of PAO oil, 112.0kg of ester oil, 128.0kg of fluorosilicone oil, 33.0kg of viscosity regulator, 4.2kg of antiwear agent and 1.9kg of metal passivator.
Wherein the PAO oil is high viscosity polyalphaolefin PAO base oil, and the viscosity index is 204 (PAO-100). The ester oil was dipentaerythritol and had a viscosity index of 90. The fluorosilicone oil is 3, 5-bis (trifluoromethyl) phenyl methyl silicone oil. The viscosity regulator is formed by mixing polytetrafluoroethylene and polydicyclopentadiene in a mass ratio of 5: 1. The antiwear agent is prepared by mixing dialkyl bismuth phosphate disulfide, potassium metaborate and molybdenum disulfide according to the mass ratio of 0.8:0.8: 5. The metal passivator consists of N, N-disalicylidene-1, 2-propyl diamine and dithiooxamide in a mass ratio of 1: 2.
The method for preparing the synthetic lubricating oil with stable storage performance of the embodiment comprises the following steps:
1) adding 100kg of PAO oil into a stirrer, then adding an antiwear agent, and stirring for 18min to obtain an antiwear agent mixed solution;
adding the rest PAO oil, ester oil and fluorosilicone oil into a blending kettle, and stirring at 55 ℃ for 35min to obtain mixed base oil;
2) adding the mixed solution of the antiwear agent into the mixed base oil, stirring for 12min at 55 ℃, adding the viscosity regulator and the metal passivator, and stirring for 20min at 60 ℃ to obtain the antiwear oil.
Example 6
The synthetic lubricating oil with stable storage performance of the embodiment is prepared from the following raw materials in parts by weight: 268.0kg of PAO oil, 110.0kg of ester oil, 133.0kg of fluorosilicone oil, 36.0kg of viscosity regulator, 3.9kg of antiwear agent and 1.88kg of metal passivator.
Wherein the PAO oil is high viscosity polyalphaolefin PAO base oil, and the viscosity index is 204 (PAO-100). The ester oil was trimethylolpropane cocoate. The fluorosilicone oil is 3, 5-bis (trifluoromethyl) phenyl methyl silicone oil. The viscosity regulator is formed by mixing polytetrafluoroethylene and polydicyclopentadiene in a mass ratio of 5: 1. The antiwear agent is prepared by mixing dialkyl bismuth phosphate disulfide, potassium triborate and tungsten disulfide according to the mass ratio of 0.6:1.2: 4.5. The metal passivator consists of N, N-disalicylidene-1, 2-butyl diamine and dithiooxamide in a mass ratio of 1: 2.
The method for preparing the synthetic lubricating oil with stable storage performance of the embodiment comprises the following steps:
1) adding 100kg of PAO oil into a stirrer, then adding an antiwear agent, and stirring for 18min to obtain an antiwear agent mixed solution;
adding the rest PAO oil, ester oil and fluorosilicone oil into a blending kettle, and stirring at 55 ℃ for 35min to obtain mixed base oil;
2) adding the mixed solution of the antiwear agent into the mixed base oil, stirring for 12min at 55 ℃, adding the viscosity regulator and the metal passivator, and stirring for 20min at 60 ℃ to obtain the antiwear oil.
Comparative example
The synthetic lubricating oil of the comparative example was prepared from the following raw materials by weight: 250.0kg of PAO oil, 220.0kg of ester oil, 30.0kg of viscosity regulator, 2.0kg of antiwear agent, 5.5kg of antioxidant and 5.0kg of metal passivator.
Wherein the PAO oil is a low viscosity polyalphaolefin PAO base oil with a viscosity index of 125(PAO 12). The ester oil was trimethylolpropane oleate with a viscosity index of 180. The viscosity regulator is polytetrafluoroethylene. The antiwear agent is molybdenum disulfide. The antioxidant is 2, 6-di-tert-butyl-p-cresol. The metal deactivator is dithiooxamide.
The preparation method of the synthetic lubricating oil of the comparative example includes the steps of:
1) adding 80kg of PAO oil into a stirrer, then adding an antiwear agent and an antioxidant, and stirring for 10min to obtain an antiwear agent mixed solution;
adding the rest PAO oil and ester oil into a blending kettle, and stirring at 50 ℃ for 40min to obtain mixed base oil;
2) adding the mixed solution of the antiwear agent into the mixed base oil, stirring for 10min at 65 ℃, adding the viscosity regulator and the metal passivator, and stirring for 20min at 60 ℃ to obtain the antiwear oil.
Test examples
(1) Viscosity measurement
The synthetic lubricating oils of examples 1 to 6 and comparative example were used and tested for oxidation induction time and viscosity index according to the test method of GB/T1995-1998 "calculation method of viscosity index of petroleum product", and dynamic viscosity at-30 ℃ according to the method of GB/T6538-2010 "method for measuring apparent viscosity of engine oil" simulation engine for cold start ", the test results being shown in Table 1.
TABLE 1 results of the oxidation resistance and viscosity property tests of the synthetic lubricating oils of examples 1 to 6 and comparative example
Figure BDA0002504939180000081
Figure BDA0002504939180000091
(2) Abrasion resistance test
The synthetic lubricating oils of examples 1 to 6 and comparative example were subjected to a wear test on a friction and wear machine at a test force of 400N, a test rotation speed of 2000r/min and a test time of 12 hours, and the test results are shown in Table 2.
TABLE 2 antiwear Properties test results of the synthetic lubricating oils of examples 1 to 6 and comparative example
Weight gain/% of test specimen Microhardness of wear surface (HV) Surface roughness (Ra/nm)
Example 1 0.0029 1157 8.5
Example 2 0.0026 1168 8.4
Example 3 0.0021 1165 7.9
Example 4 0.0020 1183 7.6
Example 5 0.0018 1225 7.5
Example 6 0.0015 1213 7.1
Comparative example 0.0056 872 25.9
As can be seen from the above table, the synthetic lubricating oil of the present invention having stable storage properties has good oxidation stability and good stability during long-term storage. The synthetic lubricating oil with stable storage performance has high viscosity index, can be adapted to a wider temperature range, has better lubricating capability at both high temperature and low temperature, has ideal dynamic viscosity at low temperature, and can be well adapted to the northern winter environment. The synthetic lubricating oil with stable storage performance has excellent wear resistance, and the wear weight gain is still lower after long-term use.

Claims (10)

1. A synthetic lubricating oil having stable storage properties, characterized by: the material is mainly prepared from the following raw materials in parts by weight: 470 portions of base oil, 610 portions of viscosity modifier, 30 to 40 portions of antiwear agent, and 1.5 to 2.5 portions of metal passivator.
2. The storage stable synthetic lubricating oil of claim 1, characterized in that: the synthetic lubricating oil with stable storage performance is mainly prepared from the following raw materials in parts by weight: 550 parts of base oil 490-one, 33-40 parts of viscosity modifier, 3.5-5.5 parts of antiwear agent and 1.8-2.5 parts of metal passivator.
3. The storage stable synthetic lubricating oil of claim 1 or 2, characterized in that: the base oil comprises at least one of PAO oil, ester oil and fluorosilicone oil.
4. The storage stable synthetic lubricating oil of claim 1 or 2, characterized in that: the metal passivator is at least one of N, N-disalicylidene-1, 2-diaminoethane, N, N-disalicylidene-1, 2-propyldiamine, N, N-disalicylidene-1, 2-butyldiamine, 8-cyanoquinoline, and dithiooxamide.
5. The storage stable synthetic lubricating oil of claim 4, characterized in that: the metal passivator comprises N, N-disalicylidene-1, 2-diaminoethane, N, N-disalicylidene-1, 2-propyldiamine, N, N-disalicylidene-1, 2-butyldiamine and dithiooxamide in a weight ratio of 1: 1-3.
6. The storage stable synthetic lubricating oil of claim 1 or 2, characterized in that: the antiwear agent is at least one of a sulfur-containing antiwear agent, a phosphorus-containing antiwear agent, a chlorine-containing antiwear agent and a boron-containing antiwear agent.
7. The storage stable synthetic lubricating oil of claim 6, characterized in that: the antiwear agent is formed by mixing at least one of a phosphorus-containing antiwear agent, a chlorine-containing antiwear agent and a boron-containing antiwear agent with a sulfur-containing antiwear agent in a mass ratio of 1-2: 4-6.
8. The storage stable synthetic lubricating oil of claim 6, characterized in that: the sulfur-containing antiwear agent is any one of molybdenum disulfide and tungsten disulfide.
9. A method of preparing a storage stable synthetic lubricating oil according to claim 1, comprising the steps of:
1) mixing the antiwear agent and part of base oil uniformly to prepare an antiwear agent mixed solution;
uniformly mixing the antiwear agent mixed solution with the rest base oil to obtain premixed oil;
2) and (3) uniformly mixing the premixed oil with a viscosity regulator and a metal passivator to obtain the metal passivator.
10. The method for preparing a synthetic lubricating oil with stable storage properties according to claim 9, wherein the temperature at which the premixed oil is uniformly mixed with the viscosity modifier and the metal deactivator in step 2) is 50 to 65 ℃.
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