阅读说明：本技术 一种水基液压液及其制备方法 (Water-based hydraulic fluid and preparation method thereof ) 是由 徐冯逸如 陆晨 岳瑞丽 何志强 宋辉 于 2020-12-16 设计创作，主要内容包括：本发明涉及一种水基液压液及其制备方法,其组分及其重量百分比含量为：去离子水35～45％,水溶性无规聚醚8～16％,水性钼和二烷基二硫代磷酸锌(ZDDP)构成的复合极压抗磨剂0.5～3.5％,三乙醇胺硼酸酯和新癸酸构成的复合防锈剂0.5～2.0％,二乙醇胺0.5～2.0％,苯丙三氮唑钠盐0.1～0.5％,聚醚改性硅消泡剂0.01～0.05％,防腐剂1～3％,乙二胺四乙酸二钠0.005～0.015％,余量的乙二醇。本发明制得的水基液压液具有优异的抗燃性,低温性,抗磨性,防锈性,低泡性,并且使用寿命长,能满足冶金、矿山、机械、化工及铸造等许多行业领域设备在高温、高压、高速、大容量使用状态下的需求。(The invention relates to a water-based hydraulic fluid and a preparation method thereof, wherein the water-based hydraulic fluid comprises the following components in percentage by weight: 35-45% of deionized water, 8-16% of water-soluble random polyether, 0.5-3.5% of a composite extreme pressure antiwear agent composed of water-based molybdenum and Zinc Dialkyl Dithiophosphate (ZDDP), 0.5-2.0% of a composite antirust agent composed of triethanolamine borate and neodecanoic acid, 0.5-2.0% of diethanolamine, 0.1-0.5% of benzotriazole sodium salt, 0.01-0.05% of a polyether modified silicon defoamer, 1-3% of a preservative, 0.005-0.015% of disodium ethylene diamine tetraacetate and the balance of ethylene glycol. The water-based hydraulic fluid prepared by the invention has excellent flame resistance, low temperature resistance, wear resistance, rust resistance, low foaming property and long service life, and can meet the requirements of equipment in high-temperature, high-pressure, high-speed and large-capacity use states in many industries such as metallurgy, mine, machinery, chemical industry, casting and the like.)

1. A water-based hydraulic fluid, which is characterized by comprising the following components in percentage by mass:

2. the water-based hydraulic fluid as claimed in claim 1, wherein the extreme pressure antiwear agent is prepared by compounding aqueous molybdenum and zinc dialkyl dithiophosphate, and the mass ratio of the aqueous molybdenum to the zinc dialkyl dithiophosphate is (1/3-3): 1.

3. the water-based hydraulic fluid as claimed in claim 1, wherein the rust inhibitor is prepared by compounding triethanolamine borate and neodecanoic acid, and the mass ratio of the triethanolamine borate to the neodecanoic acid is (0.5-2): 1.

4. the water-based hydraulic fluid of claim 1, wherein the water-soluble random polyether is a copolymer of ethylene oxide and propylene oxide (the mass ratio of ethylene oxide to propylene oxide is 3/1), and the kinematic viscosity at 40 ℃ of the water-soluble random polyether is 53000 to 60000mm²The viscosity at 100 ℃ is 7300-7900 mm²(ii)/s, viscosity index greater than 490.

5. The water-based hydraulic fluid of claim 1, wherein the defoamer is a polyether modified silicon defoamer.

6. The aqueous-based hydraulic fluid of claim 1, wherein the preservative comprises one or more of an isothiazolinone preservative or 1,3, 5-tris (2-hydroxyethyl) -6 hydro-3-oxazine, wherein the isothiazolinone preservative comprises one or more of 1, 2-benzisothiazolin-3-one, 2-n-octyl-4-isothiazolin-3-one, 2-methyl-4-isothiazolin-3-one, and 5-chloro-2-methyl-4-isothiazolin-3-one.

7. A method for preparing the water-based hydraulic fluid as claimed in any one of claims 1 to 6, comprising the steps of:

(1) adding ethylene glycol and water-soluble random polyether into deionized water in sequence, heating and stirring to obtain a first mixture;

(2) dropwise adding an extreme pressure anti-wear agent and a defoaming agent into the first mixture, and stirring simultaneously to obtain a second mixture;

(3) and cooling the second mixture, then sequentially adding an antirust agent, diethanolamine, benzotriazole sodium salt, a preservative and ethylene diamine tetraacetic acid, stirring simultaneously, and filtering to obtain the water-based hydraulic fluid.

8. The method for preparing a water-based hydraulic fluid as claimed in claim 7, wherein in the step (1), the temperature is raised to 40 to 50 ℃, and the stirring is performed for 30 to 60min after the temperature reaches 40 ℃.

9. The method for preparing a water-based hydraulic fluid as claimed in claim 7, wherein in the step (2), the stirring temperature is 40-50 ℃ and the stirring time is 20-40 min.

10. The preparation method of the water-based hydraulic fluid as claimed in claim 7, wherein in the step (3), the temperature after cooling is 20-25 ℃, and the stirring time is 30-60 min.

Technical Field

The invention relates to the technical field of hydraulic fluid, in particular to a water-based hydraulic fluid and a preparation method thereof.

Background

In recent years, water-glycol fire-retardant hydraulic fluid has been developed rapidly and applied to hydraulic systems of various devices such as continuous casting machines, coke pushers, mine hydraulic supports, forging presses, automatic electric welding machines and the like. Also, as modern equipment is developed in the direction of high temperature, high pressure, high speed and large capacity, there are extremely high demands on the abrasion and rust resistance of the water-glycol nonflammable hydraulic fluid. On one hand, water occupies a large part of the water-ethylene glycol fire-retardant hydraulic fluid, and metal is easy to rust under the action of oxygen and high temperature, and on the other hand, a hydraulic system works under high pressure and high speed for a long time, and the wear resistance is greatly tested.

In the prior art, researches on the improvement of the rust resistance and the abrasion resistance of hydraulic fluid are carried out, for example, Chinese invention patent CN109097174A uses sodium sulfurized fatty acid as an extreme pressure antiwear agent, and boric acid, adipic acid or dodecanedioic acid as an antirust agent; the Chinese invention patent CN104073333A uses long-chain carboxylic acid as an extreme pressure antiwear agent, and uses organic carboxylic acid, polycarboxylic acid and derivatives thereof, and amino acid derivatives as antirust agents; the invention patent CN102086422A uses capric acid or compound of capric acid and caprylic acid as extreme pressure antiwear agent, and monoisopropanolamine or N, N-dimethylethanolamine or compound of monoisopropanolamine and N, N-dimethylethanolamine as antirust agent. However, in the above-mentioned techniques, the rust prevention and abrasion resistance of the hydraulic fluid still remain insufficient.

Therefore, there is an urgent need in the art to develop a hydraulic fluid having higher wear resistance and rust prevention.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a water-based hydraulic fluid with stronger abrasion resistance and rust resistance.

It is also an object of the present application to provide a method for preparing the above water-based hydraulic fluid.

In order to achieve the object of the present invention, the present application provides the following technical solutions.

In a first aspect, the present application provides a water-based hydraulic fluid comprising a composition in mass percent:

in one embodiment of the first aspect, the extreme pressure antiwear agent is prepared by compounding aqueous molybdenum and zinc dialkyl dithiophosphate, and the mass ratio of the aqueous molybdenum to the zinc dialkyl dithiophosphate is (1/3-3): 1. the aqueous molybdenum mainly contains oleic acid diethanolamine molybdic acid and oleic acid diethanolamine thiophosphate components, the aqueous molybdenum is decomposed under the action of thermochemistry and tribology, and the decomposition products and a friction pair generate complex chemical reaction to generate MoS₂、ZnS、MoO₃And FePO₄The addition of zinc dialkyl dithiophosphate has a synergistic effect, can promote the decomposition of aqueous molybdenum, and has a better lubricating effect.

In one embodiment of the first aspect, the antirust agent is prepared by compounding triethanolamine borate and neodecanoic acid, wherein the mass ratio of the triethanolamine borate to the neodecanoic acid is (0.5-2): 1. the triethanolamine borate has excellent antirust performance on carbon steel and cast iron ferrous metal materials, and the carboxylic alcohol ammonium salt ester antirust agent generated by the reaction of the triethanolamine borate and neodecanoic acid has better antirust effect.

In one embodiment of the first aspect, the water-soluble random polyether is a copolymer of ethylene oxide and propylene oxide (the mass ratio of ethylene oxide to propylene oxide is 3/1), and the kinematic viscosity at 40 ℃ of the water-soluble random polyether is 53000-60000 mm²The viscosity at 100 ℃ is 7300-7900 mm²(ii)/s, viscosity index greater than 490. The polyether has high viscosity, large viscosity index, good viscosity-temperature performance and small influence of temperature on viscosity, can be used as a thickening agent to produce hydraulic fluid which can be kept stable in a hydraulic system, and can greatly reduce equipment abrasion under the condition of boundary lubrication of various hydraulic pumps。

In one embodiment of the first aspect, the defoamer is a polyether modified silicon defoamer.

In one embodiment of the first aspect, the preservative comprises one or more of an isothiazolinone preservative or 1,3, 5-tris (2-hydroxyethyl) -6-hydro-3-oxazine, wherein the isothiazolinone preservative comprises one or more of 1, 2-benzisothiazolin-3-one, 2-n-octyl-4-isothiazolin-3-one, 2-methyl-4-isothiazolin-3-one, and 5-chloro-2-methyl-4-isothiazolin-3-one.

In a second aspect, the present application also provides a method for preparing the water-based hydraulic fluid as described above, the method comprising the steps of:

(1) adding ethylene glycol and water-soluble random polyether into deionized water in sequence, heating and stirring to obtain a first mixture;

(2) dropwise adding an extreme pressure anti-wear agent and a defoaming agent into the first mixture, and stirring simultaneously to obtain a second mixture;

(3) and cooling the second mixture, then sequentially adding an antirust agent, diethanolamine, benzotriazole sodium salt, a preservative and ethylene diamine tetraacetic acid, stirring simultaneously, and filtering to obtain the water-based hydraulic fluid.

In one embodiment of the second aspect, in the step (1), the temperature is increased to 40-50 ℃, and after the temperature reaches 40 ℃, the mixture is stirred for 30-60 min.

In one embodiment of the second aspect, in the step (2), the stirring temperature is 40 to 50 ℃, and the stirring time is 20 to 40 min.

In one embodiment of the second aspect, in the step (3), the temperature after the temperature reduction is 20 to 25 ℃, and the stirring time is 30 to 60 min.

Compared with the prior art, the invention has the beneficial effects that:

(1) compared with the single extreme pressure anti-wear agent, the compound extreme pressure anti-wear agent formed by adding the water-based molybdenum and the Zinc Dialkyl Dithiophosphate (ZDDP) has the advantage that the anti-wear effect of the water-based hydraulic fluid is improved to a certain extent through the four-ball friction experiment result;

(2) compared with the single antirust agent, the composite antirust agent formed by adding triethanolamine borate and neodecanoic acid has obviously improved antirust performance;

(3) the water-based hydraulic fluid has good flame resistance, foam resistance, cold resistance and corrosion resistance, and can be applied to various hydraulic equipment in many industries such as metallurgy, mine, machinery, chemical engineering, casting and the like.

Detailed Description

The invention designs a novel water-based hydraulic fluid and a preparation method thereof, wherein the novel water-based hydraulic fluid comprises the following components in percentage by weight: 35-45% of deionized water, 8-16% of water-soluble random polyether, 0.5-3.5% of a composite extreme pressure antiwear agent composed of water-based molybdenum and Zinc Dialkyl Dithiophosphate (ZDDP), 0.5-2.0% of a composite antirust agent composed of triethanolamine borate and neodecanoic acid, 0.5-2.0% of diethanolamine, 0.1-0.5% of benzotriazole sodium salt, 0.01-0.05% of a polyether modified silicon defoamer, 1-3% of a preservative, 0.005-0.015% of disodium ethylene diamine tetraacetate and the balance of ethylene glycol. The water-based hydraulic fluid prepared by the invention has excellent flame resistance, low temperature resistance, wear resistance, rust resistance, low foaming property and long service life, and can meet the requirements of equipment in high-temperature, high-pressure, high-speed and large-capacity use states in many industries such as metallurgy, mine, machinery, chemical industry, casting and the like.

The invention aims to provide a novel water-based hydraulic fluid and a preparation method thereof, and the hydraulic fluid has better abrasion resistance and rust resistance compared with other hydraulic fluids, and particularly is realized by adding a compound extreme pressure anti-wear agent and a compound rust inhibitor.

The invention provides a novel water-based hydraulic fluid, which comprises the following components in percentage by weight:

the sum of the total amount of all the components is 100 percent.

The water-soluble random polyether is a copolymer of ethylene oxide and propylene oxide, the kinematic viscosity of the polymer at 40 ℃ is 53000-60000 mm2/s, the kinematic viscosity at 100 ℃ is 7300-7900 mm2/s, and the viscosity index is greater than 490. The manufacturers and brands of the water-soluble random polyether are Shanghai Dongda chemical Co., Ltd C-55000 (self-produced) and Korea NH Chemicals Co., Ltd W55000.

The compound formed by the water-based molybdenum and the Zinc Dialkyl Dithiophosphate (ZDDP) is prepared by compounding the water-based molybdenum and the ZDDP according to the mass ratio of 1/3-3/1. The manufacturers of the aqueous molybdenum are Shandong cloud refreshing technology development company Limited; the zinc dialkyl dithiophosphate manufacturer is Nantong Runfeng petrochemical company Limited.

The compound formed by triethanolamine borate and neodecanoic acid amine is prepared by compounding triethanolamine borate and neodecanoic acid according to the mass ratio of 1/2-2/1. The triethanolamine borate is produced by the chemical industry Co, Yongtai, of Jinnan and the neodecanoic acid is produced by the petrochemical industry Co, Yongfeng, of Jiangsu.

The preservative is one or more of isothiazolinone and 1,3, 5-tri (2-hydroxyethyl) -6-hydro-3-oxazine IPBC 20; the isothiazolinone is one or more of 1, 2-benzisothiazolin-3-one (BIT), 2-n-octyl-4-isothiazolin-3-One (OIT), 2-methyl-4-isothiazolin-3-one (MIT) and 5-chloro-2-methyl-4-isothiazolin-3-one (CMIT).

The polyether modified silicon defoamer of the invention is produced by Tanshima and is brand THI of Nicotin chemical Co., Ltd^RX-299。

The invention relates to a novel water-based hydraulic fluid and a preparation method thereof, wherein the novel water-based hydraulic fluid is prepared by the following steps:

(1) adding deionized water into a stainless steel kettle, then sequentially adding ethylene glycol and water-soluble random polyether, heating the reaction kettle while stirring, maintaining the reaction temperature at 40-50 ℃, starting timing and stirring for 30min when the reaction temperature reaches 40 ℃.

(2) And dropwise adding a composite extreme pressure antiwear agent consisting of water-based molybdenum and Zinc Dialkyl Dithiophosphate (ZDDP) and a polyether modified silicon defoaming agent, and uniformly stirring at 40-50 ℃ for 20 min.

(3) Reducing the temperature to 20-25 ℃, sequentially adding a composite antirust agent consisting of triethanolamine borate and neodecanoic acid, diethanolamine, benzotriazole sodium salt, a preservative and disodium ethylene diamine tetraacetate, uniformly stirring for 30min, and filtering to obtain the clear and transparent water-based hydraulic fluid.

Examples

The following will describe in detail the embodiments of the present invention, which are implemented on the premise of the technical solution of the present invention, and the detailed embodiments and the specific operation procedures are given, but the scope of the present invention is not limited to the following embodiments.

Example 1

A novel water-based hydraulic fluid comprises the following components in percentage by weight:

deionized water: 40 percent; water-soluble random polyether: 12 percent; the composite extreme pressure antiwear agent (the mass ratio of water-based molybdenum to Zinc Dialkyl Dithiophosphate (ZDDP) is 1: 2): 2.0 percent; 1.5 percent of composite antirust agent (the mass ratio of triethanolamine borate to neodecanoic acid is 1: 1); diethanolamine: 1.0 percent; preservative (1, 2-benzisothiazolin-3-one (BIT)): 1.0 percent; 0.01 percent of Ethylene Diamine Tetraacetic Acid (EDTA); antifoam agent (polyether modified silicon): 0.02 percent; sodium benzotriazole salt: 0.2 percent; ethylene glycol: and (4) the balance. The sum of the total amount of all the components is 100 percent.

A novel water-based hydraulic fluid is prepared by the following steps:

(1) adding 40% of deionized water into a stainless steel kettle, then sequentially adding the balance of glycol and 12% of water-soluble random polyether, heating the reaction kettle while stirring, maintaining the reaction temperature at 40-50 ℃, starting timing and stirring for 30min when the reaction temperature reaches 40 ℃.

(2) Dropwise adding 2.0% of a composite extreme pressure antiwear agent consisting of water-based molybdenum and Zinc Dialkyl Dithiophosphate (ZDDP) and 0.02% of a polyether modified silicon defoamer, and uniformly stirring at 40-50 ℃ for 20 min.

(3) Reducing the temperature to 20-25 ℃, sequentially adding 1.5% of a composite antirust agent consisting of triethanolamine borate and neodecanoic acid, 1.0% of diethanolamine, 0.2% of benzotriazole sodium salt, 1.0% of a preservative and 0.01% of disodium ethylene diamine tetraacetate, uniformly stirring for 30min, and filtering to obtain the clear and transparent water-based hydraulic fluid.

Example 2

A novel water-based hydraulic fluid comprises the following components in percentage by weight:

deionized water: 45 percent; water-soluble random polyether: 15 percent; the composite extreme pressure antiwear agent (the mass ratio of water-based molybdenum to Zinc Dialkyl Dithiophosphate (ZDDP) is 1: 2): 1.5 percent; 1.5 percent of composite antirust agent (the mass ratio of triethanolamine borate to neodecanoic acid is 1: 1); diethanolamine: 1.0 percent; preservative (1, 2-benzisothiazolin-3-one (BIT)): 1 percent; 0.01 percent of Ethylene Diamine Tetraacetic Acid (EDTA); antifoam agent (polyether modified silicon): 0.025 percent; sodium benzotriazole salt: 0.25 percent; ethylene glycol: and (4) the balance. The sum of the total amount of all the components is 100 percent.

A novel water-based hydraulic fluid is prepared by the following steps:

(1) adding 45% of deionized water into a stainless steel kettle, then sequentially adding the rest of ethylene glycol and 15% of water-soluble random polyether, heating the reaction kettle while stirring, maintaining the reaction temperature at 40-50 ℃, starting timing and stirring for 30min when the reaction temperature reaches 40 ℃.

(2) Dropwise adding 1.5% of a composite extreme pressure anti-wear agent consisting of water-based molybdenum and Zinc Dialkyl Dithiophosphate (ZDDP) and 0.025% of a polyether modified silicon defoamer, and uniformly stirring at 40-50 ℃ for 20 min.

(3) Reducing the temperature to 20-25 ℃, and sequentially adding 1.5% of a composite antirust agent consisting of triethanolamine borate and neodecanoic acid and diethanolamine: 1.0 percent of benzotriazole sodium salt, 0.2 percent of sodium benzotriazole, 1.0 percent of preservative and 0.01 percent of ethylene diamine tetraacetic acid, stirring uniformly for 30min, and filtering to obtain clear and transparent water-based hydraulic fluid.

Example 3

A novel water-based hydraulic fluid comprises the following components in percentage by weight:

deionized water: 35 percent; water-soluble random polyether: 12 percent; the composite extreme pressure antiwear agent (the mass ratio of water-based molybdenum to Zinc Dialkyl Dithiophosphate (ZDDP) is 1: 2): 2.5 percent; 1.0 percent of composite antirust agent (the mass ratio of triethanolamine borate to neodecanoic acid is 1: 1); diethanolamine: 1.0 percent; preservative (1, 2-benzisothiazolin-3-one (BIT)): 1.0 percent; 0.01 percent of Ethylene Diamine Tetraacetic Acid (EDTA); antifoam agent (polyether modified silicon): 0.015 percent; sodium benzotriazole salt: 0.15 percent; ethylene glycol: and (4) the balance. The sum of the total amount of all the components is 100 percent.

A novel water-based hydraulic fluid is prepared by the following steps:

(1) adding 35% of deionized water into a stainless steel kettle, then sequentially adding the balance of ethylene glycol and 12% of water-soluble random polyether, heating the reaction kettle while stirring, maintaining the reaction temperature at 40-50 ℃, starting timing and stirring for 30min when the reaction temperature reaches 40 ℃.

(2) Dropwise adding 2.5% of a composite extreme pressure antiwear agent consisting of water-based molybdenum and Zinc Dialkyl Dithiophosphate (ZDDP) and 0.015% of a polyether modified silicon defoaming agent, and uniformly stirring at 40-50 ℃ for 20 min.

(3) Reducing the temperature to 20-25 ℃, and sequentially adding 1.0% of a composite antirust agent consisting of triethanolamine borate and neodecanoic acid, and diethanolamine: 1.0 percent of benzotriazole sodium salt, 0.2 percent of sodium benzotriazole, 1.0 percent of preservative and 0.01 percent of ethylene diamine tetraacetic acid, stirring uniformly for 30min, and filtering to obtain clear and transparent water-based hydraulic fluid.

Example 4

A novel water-based hydraulic fluid comprises the following components in percentage by weight:

deionized water: 40 percent; water-soluble random polyether: 12 percent; the composite extreme pressure antiwear agent (the mass ratio of water-based molybdenum to Zinc Dialkyl Dithiophosphate (ZDDP) is 2: 1): 2.0 percent; 1.5 percent of composite antirust agent (the mass ratio of triethanolamine borate to neodecanoic acid is 1: 1); diethanolamine: 1.0 percent; preservative (1, 2-benzisothiazolin-3-one (BIT)): 1.0 percent; 0.01 percent of Ethylene Diamine Tetraacetic Acid (EDTA); antifoam agent (polyether modified silicon): 0.02 percent; sodium benzotriazole salt: 0.2 percent; ethylene glycol: and (4) the balance. The sum of the total amount of all the components is 100 percent.

A novel water-based hydraulic fluid is prepared by the following steps:

(1) adding 40% of deionized water into a stainless steel kettle, then sequentially adding the balance of glycol and 12% of water-soluble random polyether, heating the reaction kettle while stirring, maintaining the reaction temperature at 40-50 ℃, starting timing and stirring for 30min when the reaction temperature reaches 40 ℃.

(2) Dropwise adding 2.5% of a composite extreme pressure antiwear agent consisting of water-based molybdenum and Zinc Dialkyl Dithiophosphate (ZDDP) and 0.02% of a polyether modified silicon defoamer, and uniformly stirring at 40-50 ℃ for 20 min.

(3) Reducing the temperature to 20-25 ℃, and sequentially adding 1.5% of a composite antirust agent consisting of triethanolamine borate and neodecanoic acid and diethanolamine: 1.0 percent of benzotriazole sodium salt, 0.2 percent of sodium benzotriazole, 1.0 percent of preservative and 0.01 percent of ethylene diamine tetraacetic acid, stirring uniformly for 30min, and filtering to obtain clear and transparent water-based hydraulic fluid.

Example 5

A novel water-based hydraulic fluid comprises the following components in percentage by weight:

deionized water: 38 percent; water-soluble random polyether: 8 percent; the composite extreme pressure antiwear agent (the mass ratio of water-based molybdenum to Zinc Dialkyl Dithiophosphate (ZDDP) is 3: 1): 0.5 percent; the mass ratio of the composite antirust agent (triethanolamine borate to the neodecanoic acid is 2: 1) to 2%; diethanolamine: 2.0 percent; preservative (1,3, 5-tris (2-hydroxyethyl) -6 hydro-3-oxazine): 1.0 percent; 0.015 percent of Ethylene Diamine Tetraacetic Acid (EDTA); antifoam agent (polyether modified silicon): 0.05 percent; sodium benzotriazole salt: 0.1 percent; ethylene glycol: and (4) the balance. The sum of the total amount of all the components is 100 percent.

A novel water-based hydraulic fluid is prepared by the following steps:

(1) adding 38% of deionized water into a stainless steel kettle, then sequentially adding the balance of ethylene glycol and 8% of water-soluble random polyether, heating the reaction kettle while stirring, maintaining the reaction temperature at 40-50 ℃, starting timing and stirring for 40min when the reaction temperature reaches 40 ℃.

(2) 0.5 percent of composite extreme pressure antiwear agent consisting of water-based molybdenum and Zinc Dialkyl Dithiophosphate (ZDDP) and 0.05 percent of polyether modified silicon defoamer are added drop by drop, and are uniformly stirred at the temperature of 40-50 ℃ for 30 min.

(3) Reducing the temperature to 20-25 ℃, and sequentially adding 2% of a composite antirust agent consisting of triethanolamine borate and neodecanoic acid and diethanolamine: 2.0 percent of benzotriazole sodium salt, 0.1 percent of sodium benzotriazole, 1.0 percent of preservative and 0.015 percent of ethylene diamine tetraacetic acid, stirring evenly for 45min, and filtering to obtain clear and transparent water-based hydraulic fluid.

Example 6

A novel water-based hydraulic fluid comprises the following components in percentage by weight:

deionized water: 43 percent; water-soluble random polyether: 16 percent; the composite extreme pressure antiwear agent (the mass ratio of water-based molybdenum to Zinc Dialkyl Dithiophosphate (ZDDP) is 1: 3): 3.5 percent; 0.5 percent of composite antirust agent (the mass ratio of the triethanolamine borate to the neodecanoic acid is 1: 2); diethanolamine: 0.5 percent; preservative (5-chloro-2-methyl-4-isothiazolin-3-one (CMIT)): 3.0 percent; 0.005 percent of Ethylene Diamine Tetraacetic Acid (EDTA); antifoam agent (polyether modified silicon): 0.01 percent; sodium benzotriazole salt: 0.5 percent; ethylene glycol: and (4) the balance. The sum of the total amount of all the components is 100 percent.

A novel water-based hydraulic fluid is prepared by the following steps:

(1) adding 43% of deionized water into a stainless steel kettle, then sequentially adding the rest of ethylene glycol and 16% of water-soluble random polyether, heating the reaction kettle while stirring, maintaining the reaction temperature at 40-50 ℃, and starting timing stirring for 60min when the reaction temperature reaches 40 ℃.

(2) Dropwise adding 3.5% of a composite extreme pressure anti-wear agent consisting of water-based molybdenum and Zinc Dialkyl Dithiophosphate (ZDDP) and 0.01% of a polyether modified silicon defoamer, and uniformly stirring at 40-50 ℃ for 40 min.

(3) Reducing the temperature to 20-25 ℃, and sequentially adding 0.5% of a composite antirust agent consisting of triethanolamine borate and neodecanoic acid, and diethanolamine: 0.5 percent of benzotriazole sodium salt, 0.5 percent of preservative and 0.005 percent of ethylene diamine tetraacetic acid, stirring evenly for 60min, and filtering to obtain clear and transparent water-based hydraulic fluid.

Comparative example 1

A novel water-based hydraulic fluid comprises the following components in percentage by weight:

deionized water: 40 percent; water-soluble random polyether: 12 percent; antiwear agent aqueous molybdenum: 2.0 percent; 1.5 percent of antirust triethanolamine borate; diethanolamine: 0.5 percent; preservative (1, 2-benzisothiazolin-3-one (BIT)): 1.0 percent; 0.01 percent of Ethylene Diamine Tetraacetic Acid (EDTA); antifoam agent (polyether modified silicon): 0.02 percent; sodium benzotriazole salt: 0.2 percent; ethylene glycol: and (4) the balance. The sum of the total amount of all the components is 100 percent.

A novel water-based hydraulic fluid is prepared by the following steps:

(1) adding 40% of deionized water into a stainless steel kettle, then sequentially adding the balance of glycol and 12% of water-soluble random polyether, heating the reaction kettle while stirring, maintaining the reaction temperature at 40-50 ℃, starting timing and stirring for 30min when the reaction temperature reaches 40 ℃.

(2) Dropwise adding 2% of water-based molybdenum and 0.02% of polyether modified silicon defoaming agent, and uniformly stirring at 40-50 ℃ for 20 min.

(3) Reducing the temperature to 20-25 ℃, and sequentially adding 1.5% of triethanolamine borate and 1.5% of diethanolamine: 0.5 percent of benzotriazole sodium salt, 0.2 percent of sodium benzotriazole, 1.0 percent of preservative and 0.01 percent of ethylene diamine tetraacetic acid, stirring evenly for 30min, and filtering to obtain clear and transparent water-based hydraulic fluid.

Comparative example 2

A novel water-based hydraulic fluid comprises the following components in percentage by weight:

deionized water: 40 percent; water-soluble random polyether: 12 percent; zinc dialkyldithiophosphate (ZDDP) as an antiwear agent: 2.0 percent; 1.5 percent of antirust agent neodecanoic acid; diethanolamine: 1.5 percent; preservative (1, 2-benzisothiazolin-3-one (BIT)): 1 percent; 0.01 percent of Ethylene Diamine Tetraacetic Acid (EDTA); antifoam agent (polyether modified silicon): 0.02 percent; sodium benzotriazole salt: 0.2 percent; ethylene glycol: and (4) the balance. The sum of the total amount of all the components is 100 percent.

A novel water-based hydraulic fluid is prepared by the following steps:

(1) adding 40% of deionized water into a stainless steel kettle, then sequentially adding the balance of glycol and 12% of water-soluble random polyether, heating the reaction kettle while stirring, maintaining the reaction temperature at 40-50 ℃, starting timing and stirring for 30min when the reaction temperature reaches 40 ℃.

(2) 2 percent of Zinc Dialkyl Dithiophosphate (ZDDP) and 0.02 percent of polyether modified silicon defoamer are added drop by drop, and are uniformly stirred at the temperature of 40-50 ℃ for 20 min.

(3) Reducing the temperature to 20-25 ℃, and sequentially adding 1.5% of neodecanoic acid amine and 1.5% of diethanolamine: 1.5 percent, 0.2 percent of benzotriazole sodium salt, 1.0 percent of preservative and 0.01 percent of ethylene diamine tetraacetic acid, stirring evenly for 30min, and filtering to obtain clear and transparent water-based hydraulic fluid.

The hydraulic fluids prepared in examples 1 to 6 and comparative examples 1 and 2 were subjected to various tests, and the results are shown in Table 1

TABLE 1 test results of products of examples and comparative examples

As can be seen from the above table, (1) the composite extreme pressure anti-wear agent comprising aqueous molybdenum and zinc dialkyldithiophosphate (ZDDP) added to a water-based hydraulic fluid has superior wear resistance to that of a single extreme pressure anti-wear agent; (2) compared with the single antirust agent, the composite antirust agent formed by adding triethanolamine borate and neodecanoic acid into the water-based hydraulic fluid has excellent antirust performance, and has good flame resistance, low temperature property and defoaming property.

The embodiments described above are intended to facilitate the understanding and appreciation of the application by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present application is not limited to the embodiments herein, and those skilled in the art who have the benefit of this disclosure will appreciate that many modifications and variations are possible within the scope of the present application without departing from the scope and spirit of the present application.