CN112375608B - Economical synthetic flame-retardant hydraulic fluid composition and preparation method thereof - Google Patents
Economical synthetic flame-retardant hydraulic fluid composition and preparation method thereof Download PDFInfo
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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
- C10M169/042—Mixtures of base-materials and additives the additives being compounds of unknown or incompletely defined constitution only
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
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- 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
- C10M2207/283—Esters of polyhydroxy compounds
- C10M2207/2835—Esters of polyhydroxy compounds used as base material
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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
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/22—Heterocyclic nitrogen compounds
- C10M2215/223—Five-membered rings containing nitrogen and carbon only
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- 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
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
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- 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
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Abstract
The invention provides an economical synthetic flame-retardant hydraulic fluid composition and a preparation method thereof, wherein the hydraulic fluid composition comprises the following components: 0.1-2 parts of antioxidant, 0.01-1 part of anticorrosive agent, 0.01-3 parts of antiwear agent, 0.001-1 part of antifoaming agent and 93-100 parts of base oil; the base oil is selected from two or more of trimethylolpropane oleate, pentaerythritol oleate, glycerol oleate, hydrogenated base oil and vegetable oil. The hydraulic fluid composition adopts at least two of trimethylolpropane oleate, pentaerythritol oleate, glycerol oleate, hydrogenated base oil and vegetable oil as base oil, and is supplemented with other components, so that the hydraulic fluid composition has high-temperature flame retardancy. Also has better oil-water separation performance, foam performance and rust resistance.
Description
Technical Field
The invention belongs to a hydraulic fluid composition, and particularly relates to an economical synthetic flame-retardant hydraulic fluid composition and a preparation method thereof.
Background
Hydraulic machines have been widely used in the industries of metallurgy, coal, machinery, mines, etc., and hydraulic fluid used as a power medium is a key material in hydraulic transmission technology and is also one of three important oil products with the largest consumption of industrial lubricating oil. The hydraulic fluid is generally mineral oil as a base oil, but in high-temperature, high-pressure or near-open-fire hydraulic equipment in the industries of metallurgy, thermal processing, coal mine and the like, if the mineral oil type hydraulic fluid is used, fire can be caused by oil leakage, and in order to prevent the fire caused by the oil leakage, the hydraulic equipment in the occasions requires to use an anti-combustion hydraulic medium, namely an anti-combustion hydraulic fluid. According to ISO 12922-2012 specifications of lubricants, industrial lubricants and related products (L types) -H type (hydraulic systems), the fire-resistant hydraulic fluid is divided into six types of HFAE, HFAS, HFB, HFC, HFDU and HFDR, wherein the three types of HFAE, HFAS and HFB are eliminated because the performances of the three types of products do not meet the current increasingly developed working conditions, and the three types of products which are used in large quantities at home and abroad at present are HFC, HFDU and HFDR.
HFC is water-glycol type fire-resistant hydraulic fluid, it is made up of water, ethanediol or its polymer, this fire-resistant hydraulic fluid regards water as fire-resistant component, there are limits to use temperature and pressure, and the lubricating property is relatively poor, the selectivity to metal and non-metallic material is stronger at the same time, use and have certain limitation; the HFDR is phosphate ester synthesized flame-retardant hydraulic fluid which has high spontaneous combustion point, low volatility and good flame resistance and is mainly applied to high-pressure hydraulic systems near high-temperature heat sources and open fire, but the liquid is easy to hydrolyze, and the hydrolysis product is a highly toxic gas phase volatile matter, so that the liquid is only limited to be used in certain specific occasions, such as aircraft manufacturing and power plants; the HFDU is a flame-retardant hydraulic fluid synthesized by fatty acid ester, and the product not only has good flame-retardant effect, but also has excellent comprehensive properties such as lubricating property, viscosity-temperature property, thermal stability and the like, has good compatibility with hydraulic system materials, has the advantages of biodegradability and the like, and has been widely applied to special industries such as ferrous metallurgy, garbage power generation and the like.
Although the water-glycol type flame-retardant hydraulic fluid has low cost and excellent flame-retardant performance, the performance characteristics of the product limit the wider application of the water-glycol type flame-retardant hydraulic fluid; the phosphate type anti-combustion hydraulic fluid is expensive, has high product toxicity, is only used for a steam turbine set of a power plant, and cannot be popularized and applied in a large area; the fatty acid ester type flame-retardant hydraulic fluid has excellent comprehensive performance, is developed quickly in recent years, is mainly applied to the ferrous metallurgy industry, but has relatively high cost and large difficulty in wide popularization and application.
Therefore, how to balance the performance and the cost of the flame-retardant hydraulic fluid, so that the cost performance of the hydraulic fluid is higher, and the hydraulic fluid is widely applied and deserves deep research.
Disclosure of Invention
In view of the above, the present invention aims to provide an economical synthetic flame-retardant hydraulic fluid composition and a preparation method thereof, wherein the composition has high-temperature flame resistance.
The invention provides an economical synthetic flame-retardant hydraulic fluid composition which comprises the following components in parts by weight:
0.1-2 parts of antioxidant, 0.01-1 part of anticorrosive agent, 0.01-3 parts of antiwear agent, 0.001-1 part of antifoaming agent and 93-100 parts of base oil;
the antioxidant is selected from one or more of hindered amine antioxidant, semi-hindered phenol antioxidant, oligomer antioxidant and polymer antioxidant;
the anticorrosive agent is selected from one or more of phosphoncarboxylate, thiobenzothiazole and benzotriazole;
the antiwear agent is selected from one or more of organic chloride type, organic sulfide type, organic phosphide type and organic metal salt type antiwear agents;
the antifoaming agent is selected from one or more of polyether type, organic silicon type, amide type and acrylate type antifoaming agent;
the base oil is selected from two or more of trimethylolpropane oleate, pentaerythritol oleate, glycerol oleate, hydrogenated base oil and vegetable oil.
Preferably, the base oil is selected from a mixture of pentaerythritol oleate and hydrogenated base oil in a mass ratio of 8:2, a mixture of trimethylolpropane oleate and hydrogenated base oil in a mass ratio of 8: 2; and one or more of a mixture of glycerol oleate and hydrogenated base oil in a mass ratio of 8: 2.
Preferably, the composition has a sulfur content of not less than 100ppm, a phosphorus content of not less than 100ppm and a nitrogen content of not less than 600 ppm.
Preferably, the economical synthetic fire-retardant hydraulic fluid composition specifically comprises:
100 parts of pentaerythritol oleate and hydrogenated base oil mixture, 1 part of hindered amine antioxidant, 1 part of semi-hindered phenol antioxidant, 3 parts of phosphate antiwear agent, 0.1 part of benzotriazole anticorrosive agent and 0.05 part of organosilicon antifoaming agent;
or comprises 100 parts of trimethylolpropane oleate and hydrogenated base oil mixture, 0.8 part of hindered amine antioxidant, 0.8 part of semi-hindered phenol antioxidant, 0.05 part of organic sulfide type antiwear agent, 0.05 part of organic phosphorus sulfide type antiwear agent, 0.1 part of benzotriazole type anticorrosive agent and 0.01 part of organosilicon type antifoaming agent;
or comprises 100 parts of a mixture of glycerol oleate and hydrogenated base oil, 0.5 part of hindered amine antioxidant, 0.5 part of semi-hindered phenol antioxidant, 0.02 part of organic sulfide type antiwear agent, 0.02 part of organic sulfide phosphide type antiwear agent, 0.1 part of benzotriazole type anticorrosive agent and 0.005 part of organosilicon type antifoaming agent.
The invention provides a preparation method of an economical synthetic flame-retardant hydraulic fluid composition, which comprises the following steps:
0.1-2 parts of antioxidant, 0.01-1 part of anticorrosive agent, 0.01-3 parts of antiwear agent, 0.001-1 part of antifoaming agent and 93-100 parts of base oil are blended under the conditions that the temperature is not lower than 100 ℃, the vacuum degree is not lower than-0.09 MPa and the stirring dehydration time is not lower than 1.5h, so as to obtain the economic synthetic flame-retardant hydraulic fluid composition.
The invention provides an economical synthetic flame-retardant hydraulic fluid composition which comprises the following components in parts by weight: 0.1-2 parts of antioxidant, 0.01-1 part of anticorrosive agent, 0.01-3 parts of antiwear agent, 0.001-1 part of antifoaming agent and 93-100 parts of base oil; the antioxidant is selected from one or more of hindered amine antioxidant, semi-hindered phenol antioxidant, oligomer antioxidant and polymer antioxidant; the anticorrosive agent is selected from one or more of phosphoncarboxylate, thiobenzothiazole and benzotriazole; the antiwear agent is selected from one or more of organic chloride type, organic sulfide type, organic phosphide type, organic sulfide phosphide type and organic metal salt type antiwear agents; the antifoaming agent is selected from one or more of polyether type, organic silicon type, amide type and acrylate type antifoaming agent; the base oil is selected from trimethylolpropane oleate, pentaerythritol oleate, glycerol oleate, hydrogenated base oil and vegetable oil. The hydraulic fluid composition adopts at least two of trimethylolpropane oleate, pentaerythritol oleate, glycerol oleate, hydrogenated base oil and vegetable oil as base oil, and is supplemented with other components, so that the hydraulic fluid composition has high-temperature flame retardancy. Also has better oil-water separation performance, foam performance and rust resistance. The experimental results show that: the flash point of the hydraulic fluid composition is not lower than 270 ℃; the maximum non-clamping load PB is not lower than 687N; the abrasive grain diameter d is not higher than 0.6 mm.
Detailed Description
The invention provides an economical synthetic flame-retardant hydraulic fluid composition which comprises the following components in parts by weight:
0.1-2 parts of antioxidant, 0.01-1 part of anticorrosive agent, 0.01-3 parts of antiwear agent, 0.001-1 part of antifoaming agent and 93-100 parts of base oil;
the antioxidant is selected from one or more of hindered amine antioxidant, semi-hindered phenol antioxidant, oligomer antioxidant and polymer antioxidant;
the anticorrosive agent is selected from one or more of phosphonocarboxylate, thiobenzothiazole and benzotriazole anticorrosive agents;
the antiwear agent is selected from one or more of organic chloride type, organic sulfide type, organic phosphide type and organic metal salt type antiwear agents;
the antifoaming agent is selected from one or more of polyether type, organic silicon type, amide type and acrylate type antifoaming agent;
the base oil is selected from trimethylolpropane oleate, pentaerythritol oleate, glycerol oleate, hydrogenated base oil and vegetable oil.
The hydraulic fluid composition provided by the invention adopts at least two of trimethylolpropane oleate, pentaerythritol oleate, glycerol oleate, hydrogenated base oil and vegetable oil as base oil, and is supplemented with other components, so that the hydraulic fluid composition has high-temperature flame retardancy. Also has better oil-water separation performance, foam performance and rust resistance. The economical synthetic flame-retardant hydraulic fluid composition has better high-temperature flame resistance than that of the common wear-resistant hydraulic fluid, is close to fatty acid ester type flame-retardant hydraulic fluid, has comprehensive performance level between that of the common wear-resistant hydraulic fluid and that of the fatty acid ester type flame-retardant hydraulic fluid, has lower cost and higher cost performance than that of the fatty acid ester type flame-retardant hydraulic fluid, can meet the use requirements of hydraulic equipment, and saves the lubricating cost for enterprises.
The hydraulic fluid composition provided by the invention comprises 0.1-2 parts of antioxidant, preferably 1-2 parts. The antioxidant is selected from one or more of hindered amine antioxidant, semi-hindered phenol antioxidant, oligomer antioxidant and polymer antioxidant.
The hydraulic fluid composition provided by the invention comprises 0.01-1 part of anticorrosive agent, and preferably 0.05-0.3 part. The anticorrosive agent is selected from one or more of phosphine carboxylates, thiobenzothiazole and benzotriazole.
The hydraulic fluid composition provided by the invention comprises 0.01-3 parts of an antiwear agent, and preferably 0.02-3 parts. The antiwear agent is selected from one or more of organic chloride type, organic sulfide type, organic phosphide type and organic metal salt type antiwear agent.
The hydraulic fluid composition provided by the invention comprises 0.001-1 part of an antifoaming agent, preferably 0.005-0.05 part. The antifoaming agent is one or more selected from polyether type, organic silicon type, amide type and acrylate type antifoaming agent.
The hydraulic fluid composition provided by the invention comprises 93-100 parts of base oil. The base oil is selected from two or more of trimethylolpropane oleate, pentaerythritol oleate, glycerol oleate, hydrogenated base oil and vegetable oil. The base oil is preferably selected from a mixture of pentaerythritol oleate and hydrogenated base oil; a mixture of trimethylolpropane oleate and hydrogenated base oil; and one or more of a mixture of glyceryl oleate and a hydrogenated base oil. In a specific embodiment, the base oil is selected from a mixture of pentaerythritol oleate and hydrogenated base oil in a mass ratio of 8:2, and a mixture of trimethylolpropane oleate and hydrogenated base oil in a mass ratio of 8: 2; and one or more of a mixture of glycerol oleate and hydrogenated base oil in a mass ratio of 8: 2.
In the invention, the economical synthetic flame-retardant hydraulic fluid composition specifically comprises:
100 parts of pentaerythritol oleate and hydrogenated base oil mixture, 1 part of hindered amine antioxidant, 1 part of semi-hindered phenol antioxidant, 3 parts of phosphate antiwear agent, 0.1 part of benzotriazole anticorrosive agent and 0.05 part of organosilicon antifoaming agent;
or comprises 100 parts of trimethylolpropane oleate and hydrogenated base oil mixture, 0.8 part of hindered amine antioxidant, 0.8 part of semi-hindered phenol antioxidant, 0.05 part of organic sulfide type antiwear agent, 0.05 part of organic phosphorus sulfide type antiwear agent, 0.1 part of benzotriazole type anticorrosive agent and 0.01 part of organosilicon type antifoaming agent;
or comprises 100 parts of a mixture of glycerol oleate and hydrogenated base oil, 0.5 part of hindered amine antioxidant, 0.5 part of semi-hindered phenol antioxidant, 0.02 part of organic sulfide type antiwear agent, 0.02 part of organic sulfide phosphide type antiwear agent, 0.1 part of benzotriazole type anticorrosive agent and 0.005 part of organosilicon type antifoaming agent.
The sulfur content of the composition provided by the invention is not less than 100ppm, the phosphorus content is not less than 100ppm, and the nitrogen content is not less than 600 ppm.
The composition provided by the invention has good high-temperature flame resistance, excellent comprehensive performances such as lubricating performance, antirust performance, foaming performance and the like, lower cost and higher cost performance compared with HFDU (high frequency melt channel) type products, and is suitable for high-temperature, high-pressure or near-open-fire hydraulic equipment in the industries such as metallurgy, hot working, coal mine and the like. Along with the development of hydraulic equipment towards high temperature and high pressure and the upgrading of environmental protection requirements, the HFC water-glycol type anti-flaming liquid is gradually replaced by the synthetic type flame-retardant hydraulic liquid, the demand of the synthetic type flame-retardant hydraulic liquid can reach or even exceed 1 ten thousand tons within a foreseeable period, the current market demand rises year by year, and the future application prospect is huge.
The invention provides a preparation method of an economical synthetic flame-retardant hydraulic fluid composition, which comprises the following steps:
0.1-2 parts of antioxidant, 0.01-1 part of anticorrosive agent, 0.01-3 parts of antiwear agent, 0.001-1 part of antifoaming agent and 93-100 parts of base oil are blended under the conditions that the temperature is not lower than 100 ℃, the vacuum degree is not lower than-0.09 MPa and the stirring dehydration time is not lower than 1.5h to obtain the economical synthetic flame-retardant hydraulic fluid composition.
In a specific example, the temperature of tempering is 105 ℃. The tempering time is preferably 2 h. The blending is preferably performed under stirring.
In order to further illustrate the present invention, the following examples are provided to describe an economical synthetic fire-retardant hydraulic fluid composition and a method for preparing the same in detail, but they should not be construed as limiting the scope of the present invention.
Example 1
Weighing 100 parts by weight of pentaerythritol oleate and hydrogenated base oil in a mass ratio of 8:2, adding 1 part by weight of hindered amine antioxidant and 1 part by weight of semi-hindered phenol antioxidant, adding 3 parts by weight of phosphate ester type antiwear agent, 0.1 part by weight of benzotriazole anticorrosive agent and 0.05 part by weight of organosilicon type antifoaming agent, and stirring for 2 hours at 105 ℃ and under the condition that the vacuum degree is-0.09 MPa to obtain a mixture; and controlling the content of the obtained mixture until the sulfur content of the mixture is not less than 100ppm, the phosphorus content of the mixture is not less than 100ppm, and the nitrogen content of the mixture is not less than 600ppm, so as to obtain the economical synthetic flame-retardant hydraulic fluid composition.
Example 2
Weighing 100 parts by weight of trimethylolpropane oleate and hydrogenation base oil in a mass ratio of 8:2, adding 0.8 part by weight of hindered amine antioxidant and 0.8 part by weight of semi-hindered phenol antioxidant, adding 0.05 part by weight of organic sulfide type and 0.05 part by weight of organic sulfide phosphide type extreme pressure antiwear agent, 0.1 part by weight of benzotriazole anticorrosive agent and 0.01 part by weight of organosilicon type antifoaming agent, and stirring for 2 hours at 105 ℃ and a vacuum degree of-0.09 MPa to obtain a mixture; and controlling the content of the obtained mixture until the sulfur content in the mixture is not less than 100ppm, the phosphorus content is not less than 100ppm and the nitrogen content is not less than 600ppm, thus obtaining the economical synthetic flame-retardant hydraulic fluid composition.
Example 3
Weighing 100 parts by weight of glyceryl oleate and hydrogenated base oil in a mass ratio of 8:2, adding 0.5 part by weight of hindered amine antioxidant and 0.5 part by weight of semi-hindered phenol antioxidant, then adding 0.02 part by weight of organic sulfide type and 0.02 part by weight of organic sulfide phosphide type extreme pressure antiwear agent, 0.1 part by weight of benzotriazole type anticorrosive agent and 0.005 part by weight of organosilicon type antifoaming agent, and stirring for 2 hours under the conditions of 105 ℃ and a vacuum degree of-0.09 MPa to obtain a mixture; and controlling the content of the obtained mixture until the sulfur content of the mixture is not less than 100ppm, the phosphorus content of the mixture is not less than 100ppm, and the nitrogen content of the mixture is not less than 600ppm, so as to obtain the economical synthetic flame-retardant hydraulic fluid composition.
The physical and chemical properties, high-temperature properties and lubricating properties of the economical synthetic fire-retardant hydraulic fluid compositions provided in examples 1 to 3 were tested, and the results are shown in table 1:
TABLE 1 Performance test results for compositions prepared in examples 1-3
As can be seen from Table 1, the economical synthetic flame-retardant hydraulic fluid prepared in example 2 had a high-temperature flash point of 293 ℃ and excellent foaming properties, and was evaluated for lubricating properties by a four-ball machine test with a maximum non-seizing load PBThe abrasive wear resistance is not lower than 687N, the abrasive wear diameter d is not higher than 0.5mm, and oxidation performance evaluation experiments show that the viscosity and acid value change after oxidation is small, the service life is long, and the economic cost of the hydraulic fluid composition is optimal.
From the above examples, the invention provides an economical synthetic flame-retardant hydraulic fluid composition, which comprises the following components in parts by weight: 0.1-2 parts of antioxidant, 0.01-1 part of anticorrosive agent, 0.01-3 parts of antiwear agent, 0.001-1 part of antifoaming agent and 93-100 parts of base oil; the antioxidant is selected from one or more of hindered amine antioxidant, semi-hindered phenol antioxidant, oligomer antioxidant and polymer antioxidant; the anticorrosive agent is selected from one or more of phosphoniumhydroxylate, sulfydryl benzothiazole and benzotriazole anticorrosive agents; the antiwear agent is selected from one or more of organic chloride type, organic sulfide type, organic phosphide type and organic metal salt type antiwear agents; the antifoaming agent is selected from one or more of polyether type, organic silicon type, amide type and acrylate type antifoaming agent; the base oil is selected from two or more of trimethylolpropane oleate, pentaerythritol oleate, glycerol oleate, hydrogenated base oil and vegetable oil. The hydraulic fluid composition adopts trihydroxymethylAt least two of propane oleate, pentaerythritol oleate, glycerol oleate, hydrogenated base oil and vegetable oil are used as base oil, and other components are added to make the base oil have high-temperature flame retardancy. Also has better oil-water separation performance, foam performance and antirust property. The experimental results show that: the flash point of the hydraulic fluid composition is 271-291 ℃; maximum no-seizing load PB687N to 932N; the diameter d of the abrasive wear scar is 0.42-0.6 mm.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (3)
1. An economical synthetic flame-retardant hydraulic fluid composition comprises the following components in parts by weight:
0.1-2 parts of antioxidant, 0.01-1 part of anticorrosive agent, 0.01-3 parts of antiwear agent, 0.001-1 part of antifoaming agent and 93-100 parts of base oil;
the antioxidant is selected from hindered amine antioxidant and semi-hindered phenol antioxidant;
the corrosion inhibitor is selected from benzotriazole corrosion inhibitors;
the antiwear agent is selected from an organosulfur type and an organosulfur phosphide type;
the antifoaming agent is selected from organosilicon;
the base oil is a mixture of trimethylolpropane oleate and hydrogenated base oil in a mass ratio of 8: 2;
the sulfur content of the composition is not less than 100ppm, the phosphorus content is not less than 100ppm and the nitrogen content is not less than 600 ppm.
2. The economical synthetic fire-retardant hydraulic fluid composition according to claim 1, wherein the economical synthetic fire-retardant hydraulic fluid composition is specifically:
100 parts of trimethylolpropane oleate and hydrogenated base oil mixture, 0.8 part of hindered amine antioxidant, 0.8 part of semi-hindered phenol antioxidant, 0.05 part of organic sulfide type antiwear agent, 0.05 part of organic sulfur sulfide type antiwear agent, 0.1 part of benzotriazole anticorrosive agent and 0.01 part of organosilicon type antifoaming agent.
3. A method for preparing the economical synthetic fire-retardant hydraulic fluid composition as claimed in any one of claims 1-2, comprising the following steps:
0.1-2 parts of antioxidant, 0.01-1 part of anticorrosive agent, 0.01-3 parts of antiwear agent, 0.001-1 part of antifoaming agent and 93-100 parts of base oil are blended under the conditions that the temperature is not lower than 100 ℃, the vacuum degree is not lower than-0.09 MPa and the stirring dehydration time is not lower than 1.5h to obtain the economical synthetic flame-retardant hydraulic fluid composition.
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