Aviation fluid-resistant water-based paint as well as preparation method and application thereof

Abstract

The invention relates to an aviation fluid-resistant water-based paint and a preparation method and application thereof.The aviation fluid-resistant water-based paint comprises a primer and a finish paint, and the primer and the finish paint are both prepared by matching silane-modified water-based epoxy resin with a water-based epoxy amine adduct and a water-based amino-containing acrylate copolymer mixture, a tertiary amine structure in the water-based amino-containing acrylate copolymer can catalyze a reaction between-NH-and an epoxy group, and meanwhile, a high glass transition temperature provided by the water-based amino-containing acrylate copolymer can further improve the surface drying speed of a paint film, so that the overlying resistance of the paint film is improved. Compared with the prior art, the aviation fluid-resistant water-based paint system has the advantages of excellent adhesive force, high drying speed, good overlying resistance, excellent phosphate hydraulic oil resistance and excellent salt spray resistance.

Description

Technical Field

[0001] The invention relates to the field of aviation coating protection, and in particular to an aviation fluid-resistant water-based coating and a preparation method and application thereof. Background Art

[0002] With the development of modern economy, airplanes, as an important means of transportation, have gradually become one of the first choices for people to travel; in the military field, the continuous strengthening of air power by various countries has promoted the development of military aircraft; therefore, both civil and military aircraft have experienced rapid development in terms of quantity and quality in the past two decades. However, the world's civil aviation aircraft manufacturing market is mainly divided by the two aviation giants Boeing of the United States and Airbus of Europe, especially in the market of civil large and medium-sized trunk aircraft, where the two companies have completely monopolized. The domestic situation is similar. In terms of the development of the aviation industry, China is still far behind the advanced countries in Europe and the United States. As my country gradually attaches importance to the positive role played by the aviation industry in national defense security and national industrial development, the aviation industry has been vigorously developed in recent years, and a number of key aircraft development projects have achieved significant results.

[0003] Commercial Aircraft Corporation of China, Ltd. (COMAC) is the main manufacturer of civil aircraft in China. It has developed and produced the C919 large passenger aircraft and the ARJ21 regional passenger aircraft. The C919 is a medium- and short-range single-aisle jet designed independently by China, designed to compete with the Boeing 737 and Airbus A320 series. The regional aircraft "Xinzhou 60" produced by AVIC Xi'an Aircraft Industry (Group) Co., Ltd. has entered the international market and has achieved good market response. my country has a strong desire to develop its own large and medium-sized trunk aircraft. At the same time, in terms of national policies and regulations, China's aviation coatings industry is promoted and regulated by a number of policies. National policies encourage the green and environmentally friendly development of the coatings industry, especially the "carbon peak and carbon neutrality" strategy has put forward higher environmental protection requirements for the aviation coatings industry, promoting the industry to transform towards green and environmental protection.

[0004] As we all know, aircraft are easily affected by various meteorological conditions during flight, such as precipitation and hail, and traditional coatings are often difficult to effectively cope with these challenges, and are prone to corrosion and shedding, which brings many troubles to the use and maintenance of aircraft. As an indispensable component of aviation products, coatings play an extremely critical protective role in improving the corrosion resistance of metal and non-metal substrates, parts, etc. of aircraft. They are not only the external decorative materials of aircraft bodies, but also the guarantee of safe and excellent flight of modern aircraft in harsh climates. At the same time, the coatings need to meet the requirements of energy conservation and environmental protection, such as reducing flight resistance and reducing fuel consumption. Aviation fluid-resistant coatings that can provide great protection for aircraft from various chemicals, hydraulic oils, aviation fuels, phosphate ester liquids and other corrosive media have always been a difficulty and a huge challenge. Its technology is mainly monopolized by several well-known foreign coating companies, such as PPG, Akzo Nobel, Mankiewicz, etc. At present, only the Marine Chemical Research Institute has developed water-based fluid-resistant coating products in China. Therefore, the development of water-based fluid-resistant coatings with independent intellectual property rights has far-reaching significance and important value for the development of the enterprise itself and the sustainable development of the entire society and environment. Summary of the invention

[0005] The purpose of the present invention is to provide an aviation fluid-resistant water-based coating and its preparation method and application. The aviation fluid-resistant water-based coating comprises a primer and a topcoat, and both the primer and the topcoat are a mixture of a silane-modified water-based epoxy resin, a water-based epoxyamine adduct, and a water-based amino-containing acrylate copolymer. The aviation fluid-resistant water-based coating system has excellent adhesion, fast drying, good anti-stackability, and excellent resistance to phosphate ester hydraulic oil and salt spray.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] An aviation fluid-resistant water-based paint, comprising a primer and a topcoat,

[0008] The primer is composed of a main agent and a curing agent, and the mass ratio of the main agent to the curing agent is 100: (35-60);

[0009] The topcoat is composed of a main agent and a curing agent, and the mass ratio of the main agent to the curing agent is 100: (45-110);

[0010] The main agent of the primer is prepared from the following raw materials in percentage by weight:

[0011]

[0012]

[0013] The main agent of the topcoat is prepared from the following raw materials in percentage by weight:

[0014]

[0015] The curing agent is prepared from the following raw materials in percentage by weight:

[0016]

[0017] Furthermore, the water-based epoxy amine adduct is selected from any one or more combinations of STW703 of Huayi Jinghua, Aradur3986 of Huntsman or Aradur 38-1.

[0018] Furthermore, the structure of the aqueous amino-containing acrylate copolymer is shown in Formula I:

[0019]

[0020] Furthermore, the aqueous amino-containing acrylic ester copolymer is prepared from the following raw materials in percentage by weight:

[0021]

[0022]

[0023] In the above further, the co-solvent is selected from any one or more combinations of propylene glycol methyl ether, ethylene glycol butyl ether or propylene glycol methyl ether;

[0024] The (meth)acrylic acid alkyl ester is selected from any one or more combinations of butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, isobornyl methacrylate or cyclohexyl methacrylate, etc.;

[0025] The vinyl monomer is selected from any one or more combinations of styrene, p-methylstyrene or acrylonitrile;

[0026] The amino-containing (meth)acrylate is selected from any one or more combinations of dimethylaminoethyl methacrylate, 3-dimethylaminopropyl methacrylamide or 2-tert-butylaminoethyl methacrylate;

[0027] The methoxy polyethylene glycol acrylate is methoxy polyethylene glycol (500) methacrylate;

[0028] The initiator is selected from any one or more combinations of azobisisobutyronitrile, dibenzoyl peroxide, diisopropylbenzene peroxide, tert-butyl perbenzoate, tert-amyl perbenzoate, tert-butyl peroxy-2-ethylhexanoate, tert-amyl peroxy-2-ethylhexanoate, di-tert-butyl peroxide or di-tert-amyl peroxide.

[0029] As a preferred technical solution, the methoxy polyethylene glycol (500) methacrylate was purchased from Evonik MPEG 500MA.

[0030] Furthermore, the specific steps of the preparation method of the water-based amino-containing acrylic ester copolymer are as follows:

[0031] S1. Add a cosolvent into a reaction kettle, introduce nitrogen, stir and heat to a specified temperature, start to dropwise add a mixed monomer of alkyl (meth)acrylate, vinyl monomer, amino-containing (meth)acrylate, methoxy polyethylene glycol acrylate and initiator, and after the dropwise addition is completed, heat preservation is performed to obtain a mixture;

[0032] S2. Adjust the temperature of the mixture obtained in step S1 to 75-80° C., add glacial acetic acid, stir, and then dropwise add deionized water to obtain a slightly yellowish translucent aqueous amino-containing acrylate copolymer.

[0033] As a preferred technical solution, in step S1, the temperature range of the heating is 110-116°C.

[0034] The dropwise addition time of the mixed monomer is 3 to 5 hours.

[0035] The insulation time is 2 hours.

[0036] As a preferred technical solution, in step S2, the stirring time is 20 to 30 minutes.

[0037] The deionized water is added dropwise for 1 to 2 hours.

[0038] Furthermore, the structure of the silane-modified waterborne epoxy resin is shown in Formula II:

[0039]

[0040] Furthermore, the silane-modified waterborne epoxy resin is prepared from the following raw materials in percentage by weight:

[0041]

[0042] In the above, the epoxy resin is further selected from any one or more combinations of epoxy resins having an epoxy equivalent of 180 to 550;

[0043] The polyether monoamine is selected from Huntsman M1000, M2070 or Any one or more combinations of polyetheramines such as M3085,

[0044] The co-solvent is selected from any one or more combinations of propylene glycol methyl ether, ethylene glycol butyl ether or propylene glycol butyl ether.

[0045] Furthermore, the specific steps of the preparation method of the silane-modified waterborne epoxy resin are as follows:

[0046] S1, adding part of epoxy resin into a reaction kettle, introducing nitrogen, adding γ-aminopropyltriethoxysilane after heating, and adding part of cosolvent after reacting for a period of time to obtain prepolymer A;

[0047] S2, adding another part of epoxy resin and polyether monoamine into the reaction kettle, introducing nitrogen, heating, and adding another part of cosolvent after reacting for a period of time to obtain prepolymer B;

[0048] S3, mixing the prepolymer A prepared in step S1 with the prepolymer B prepared in step S2, and stirring them evenly to obtain a silane-modified waterborne epoxy resin.

[0049] As a preferred technical solution, in step S1, the temperature range of the heating is 90-110°C.

[0050] The reaction time is 4 to 5 hours.

[0051] As a preferred technical solution, in step S2, the temperature range of the heating is 110-125°C.

[0052] The reaction time is 3 to 4 hours.

[0053] As a preferred technical solution, in step S1 and step S2, the ratio of the epoxy resin in the process of preparing prepolymer A to the epoxy resin in the process of preparing prepolymer B is 100:(1-21);

[0054] The ratio of the cosolvent in the process of preparing prepolymer A to the cosolvent in the process of preparing prepolymer B is 0.7-1:0-0.3.

[0055] As a preferred technical solution, in step S3, the ratio of the prepolymer A prepared in step S1 to the prepolymer B prepared in step S2 is 100:(6-20).

[0056] Furthermore, the epoxy silane is selected from any one or more combinations of Coatosil MP200 or KH560 of Momentive.

[0057] The present invention also provides a method for preparing an aviation fluid-resistant water-based coating, the specific steps of which are as follows:

[0058] S1. Preparation of the main agent of primer:

[0059] S1-1, adding water-based epoxy amine adduct, water-based amino-containing acrylate copolymer, deionized water and dispersant into a paint mixing tank, stirring evenly, adding pigment, anti-rust pigment and filler under low-speed stirring, dispersing at high speed until no raw powder is present, and grinding to obtain slurry;

[0060] S1-2, adding a wetting agent, a defoaming agent, a co-solvent and a rheological additive to the slurry obtained in step S1-1 in sequence, and stirring at high speed to obtain a main agent of the primer;

[0061] S2. Main agent for preparing topcoat:

[0062] S2-1, adding water-based epoxy amine adduct, water-based amino-containing acrylate copolymer, deionized water and dispersant into a paint mixing tank, stirring evenly, adding pigment and filler under low-speed stirring, dispersing at high speed until no raw powder is present, and grinding to obtain slurry;

[0063] S2-2, adding a wetting agent, a defoaming agent, a cosolvent and a rheological additive to the slurry obtained in step S2-1 in sequence, and stirring at high speed to obtain a main agent for the topcoat;

[0064] S3. Preparation of curing agent:

[0065] Add silane-modified waterborne epoxy resin into a paint mixing tank, add epoxy silane under stirring conditions, and obtain a curing agent after high-speed dispersion;

[0066] S4, mixing the measured main agent and curing agent components of the primer according to the designed ratio to obtain a primer for the aviation fluid-resistant water-based coating;

[0067] S5. Mix the measured main agent and curing agent components of the topcoat according to the designed ratio to obtain the topcoat of the aviation fluid-resistant water-based coating.

[0068] Furthermore, in step S1-1, the grinding fineness of the slurry in the main agent of the primer is ≤45 μm.

[0069] Furthermore, in step S2-1, the grinding fineness of the slurry in the main agent of the topcoat is ≤20 μm.

[0070] As a preferred technical solution, in steps S1-1 and S2-1, the low-speed stirring speed is 200-300 rpm, and the high-speed stirring speed is 800-1000 rpm.

[0071] As a preferred technical solution, in steps S1-2 and S2-2, the high-speed stirring speed is 800-1000 rpm.

[0072] In addition, the present invention also provides an application of an aviation fluid-resistant water-based coating, wherein the aviation fluid-resistant water-based coating is used to prepare an internal coating, an intermediate coating or an external coating of an aircraft body.

[0073] As a preferred technical solution, the aviation fluid-resistant water-based paint is used to prepare the skin primer of the external coating.

[0074] As a preferred technical solution, the aircraft is a civil airliner.

[0075] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0076] 1) The present invention uses a silane-modified waterborne epoxy resin to replace waterborne epoxy emulsion for paint making. Compared with ordinary waterborne epoxy emulsion, in addition to reacting with -NH- groups to form a cross-linked network structure, Si-O-Si bonds can be formed through the polycondensation reaction of siloxane, thereby further improving the cross-linking degree and the resistance of the paint film to phosphate ester hydraulic oil. At the same time, the adhesion to the substrate can be improved, and the water resistance, impact resistance and salt spray resistance can be improved.

[0077] 2) The present invention uses a mixture of a water-based epoxy amine adduct and a water-based amino-containing acrylate copolymer to match the water-based epoxy. The tertiary amine structure in the water-based amino-containing acrylate copolymer can catalyze the reaction of -NH- and epoxy groups. At the same time, the high glass transition temperature provided by the water-based amino-containing acrylate copolymer can further increase the surface drying speed of the paint film, thereby improving the anti-stacking performance of the coating film.

[0078] 3) The aviation fluid-resistant water-based coating prepared by the present invention has a primer and a topcoat both of which are a mixture of a silane-modified water-based epoxy resin, a water-based epoxyamine adduct and a water-based amino-containing acrylate copolymer. The coating system has excellent adhesion, fast drying, good anti-stackability, and excellent resistance to phosphate ester hydraulic oil and salt spray. DETAILED DESCRIPTION

[0079] The present invention is described in detail below in conjunction with specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments. In the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0080] Example 1

[0081] This embodiment provides a method for preparing an aqueous amino-containing acrylate copolymer, and the specific steps are as follows:

[0082] S1, add 52 grams of propylene glycol methyl ether into a reactor, pass nitrogen, stir and heat to 110 ° C, start to drop 92 grams of methyl methacrylate, 40 grams of styrene, 80 grams of cyclohexyl methacrylate, 33.6 grams of butyl acrylate, 12 grams of methoxy polyethylene glycol (500) methacrylate, 24 grams of dimethylaminoethyl methacrylate, 56 grams of 2-tert-butylaminoethyl methacrylate and 6.4 grams of azobisisobutyronitrile mixed monomer, control the dropping speed evenly, drip the mixed monomer in about 4 hours, after the addition is completed, keep warm at this temperature for 2 hours to obtain a mixture;

[0083] S2, lowering the temperature of the mixture obtained in step S1 to 75° C., adding 10 g of glacial acetic acid, stirring for 20 minutes, and then evenly dropping 443 g of deionized water within 2 hours to obtain a slightly yellowish translucent aqueous amino-containing acrylate copolymer.

[0084] The performance of the aqueous amino-containing acrylate copolymer prepared in Example 1 was tested. The test results are shown in Table 1:

[0085] Table 1 Test results of water-based amino-containing acrylate copolymer in Example 1

[0086] Parameters Test Results Solid content (theoretical data) 43.2％ Viscosity 6200mPa·s pH (10% in deionized water) 7.5

[0087] Example 2

[0088] This embodiment provides a method for preparing a silane-modified waterborne epoxy resin, and the specific steps are as follows:

[0089] S1, 60 g of NPES 901 epoxy resin and 120 g of NPEL 128 epoxy resin were added to a reaction kettle, nitrogen was introduced, the temperature was raised to 110° C., 83 g of γ-aminopropyltriethoxysilane was added, and after reacting at this temperature for 4 hours, 137 g of propylene glycol methyl ether was added to obtain prepolymer A;

[0090] S2, 25g NPEL 128 epoxy resin and 184.5g M3085 was added into the reactor, nitrogen was introduced, the temperature was raised to 125°C, and the prepolymer B was obtained after reacting at this temperature for 3 hours;

[0091] S3, 400 g of prepolymer A and 34 g of prepolymer B were mixed and stirred evenly to obtain a silane-modified waterborne epoxy resin.

[0092] The performance of the silane-modified waterborne epoxy resin prepared in Example 2 was tested, and the test results are shown in Table 2:

[0093] Table 2 Test results of silane-modified waterborne epoxy resin in Example 2

[0094] Parameters Test Results Solid content (theoretical data) 68.5％ Viscosity 3800mPa·s Epoxide equivalent (solid), g / eq 474

[0095] Example 3

[0096] This embodiment provides a method for preparing a primer for an aviation fluid-resistant water-based coating, and the specific steps are as follows:

[0097] S1. Preparation of the main agent of primer:

[0098] S1-1. Add STW703 (aqueous epoxyamine adduct), the aqueous amino-containing acrylate copolymer prepared in Example 1, deionized water, and VXW 6208 dispersant into a paint mixing tank according to the proportions in Table 3. After uniform dispersion, add titanium dioxide, chromium oxide green, strontium chrome yellow, 1250 mesh precipitated barium sulfate, 800 mesh talc, and BYK024 under low-speed (200-300 rpm) stirring, disperse at high speed (800-1000 rpm) until no raw powder is present, and grind to a fineness of ≤35 μm to obtain a slurry.

[0099] S1-2. BYK345, propylene glycol methyl ether, ethylene glycol butyl ether and Rheolate 299 were added to the slurry obtained in step S1-1 in sequence, and stirred at high speed (800-1000 rpm) for 15 minutes to obtain the main agent of the primer.

[0100] S2. Preparation of curing agent:

[0101] The silane-modified waterborne epoxy resin prepared in Example 2 was added to a paint mixing tank according to the ratio in Table 4, and KH560 was added under stirring, and the curing agent was obtained after high-speed (800-1000 rpm) dispersion for 5 minutes;

[0102] S3. Mix the main agent of the primer prepared in step S1 and the curing agent prepared in step S2 in a mass ratio of 100:54 to obtain a primer.

[0103] Table 3 Formula of each component of the main agent of the primer in Example 3

[0104] raw material Mass(g) STW703 11.5 The aqueous amino-containing acrylate copolymer prepared in Example 1 6.5 VXW 6208 dispersant 2 Deionized water 18.6 Titanium dioxide 4 Chrome Oxide Green 2.5 Strontium chrome yellow 18.5 1250 mesh precipitated barium sulfate 22 800 mesh talcum powder 10 Propylene glycol methyl ether 2.5 Ethylene glycol butyl ether 1 BYK345 0.2 BYK024 0.2 Rheolate 299 0.5

[0105] Table 4 Formula of each component of curing agent in Example 3

[0106] raw material Mass(g) Silane-modified waterborne epoxy resin prepared in Example 2 96 KH560 4

[0107] The primer of the aviation fluid-resistant water-based coating prepared in Example 3 was tested, and the test results are shown in Table 5:

[0108] Table 5 Test results of the primer of the aviation fluid-resistant water-based coating prepared in Example 3

[0109]

[0110]

[0111] Example 4

[0112] This embodiment provides a method for preparing a topcoat of an aviation fluid-resistant water-based coating, and the specific steps are as follows:

[0113] S1. Main agent for preparing topcoat:

[0114] S1-1. Aradur 3986 (water-based epoxyamine adduct), the water-based amino-containing acrylate copolymer prepared in Example 1, deionized water, and VXW 6208 dispersant were added to a paint mixing tank according to the proportions in Table 6. After uniform dispersion, titanium dioxide, carbon black, 1250 mesh precipitated barium sulfate, 800 mesh talc, and BYK024 were added under low-speed (200-300 rpm) stirring. After dispersion at high speed (800-1000 rpm) until no raw powder was present, the mixture was ground to a fineness of ≤20 μm to obtain a slurry.

[0115] S1-2. BYK345, propylene glycol methyl ether, ethylene glycol butyl ether and Rheolate 299 were added to the slurry obtained in step S1-1 in sequence, and the mixture was stirred at high speed for 15 minutes to obtain the main agent of the topcoat.

[0116] S2. Preparation of curing agent:

[0117] The silane-modified waterborne epoxy resin prepared in Example 2 was added to a paint mixing tank according to the ratio in Table 7, and KH560 was added under stirring, and the curing agent was obtained after high-speed (800-1000 rpm) dispersion for 5 minutes;

[0118] S3, mixing the main agent of the topcoat prepared in step S1 and the curing agent prepared in step S2 in a mass ratio of 100:45 to obtain a topcoat.

[0119] Table 6 Formula of each component of the main agent of the topcoat in Example 4

[0120]

[0121]

[0122] Table 7 Formula of each component of curing agent in Example 4

[0123] raw material Mass(g) Silane-modified waterborne epoxy resin prepared in Example 2 96 KH560 4

[0124] The topcoat of the aviation fluid-resistant water-based coating prepared in Example 4 was tested, and the test results are shown in Table 8:

[0125] Table 8 Test results of the topcoat of the aviation fluid-resistant water-based coating prepared in Example 4

[0126]

[0127]

[0128] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. An aviation fluid-resistant water-based coating, characterized in that: The aviation fluid-resistant water-based coating comprises a primer and a topcoat. The primer is composed of a main agent and a curing agent, and the mass ratio of the main agent to the curing agent is 100: (35-60); The topcoat is composed of a main agent and a curing agent, and the mass ratio of the main agent to the curing agent is 100: (45-110); The main agent of the primer is prepared from the following raw materials in percentage by weight: The main agent of the topcoat is prepared from the following raw materials in percentage by weight: The curing agent is prepared from the following raw materials in percentage by weight:

2. The aviation fluid-resistant water-based coating according to claim 1, characterized in that: The water-based epoxy amine adduct is selected from any one or more combinations of STW703 of Huayi Jinghua, Aradur 3986 of Huntsman or Aradur 38-1; The epoxy silane is selected from any one or more combinations of Coatosil MP200 or KH560 produced by Momentive.

3. The aviation fluid-resistant water-based coating according to claim 1, characterized in that: The structure of the aqueous amino-containing acrylate copolymer is shown in Formula I: The aqueous amino-containing acrylate copolymer is prepared from the following raw materials in percentage by weight:

4. The aviation fluid-resistant water-based coating according to claim 3, characterized in that: The co-solvent is selected from any one or more combinations of propylene glycol methyl ether, ethylene glycol butyl ether or propylene glycol methyl ether; The (meth)acrylic acid alkyl ester is selected from any one or more combinations of butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, isobornyl methacrylate or cyclohexyl methacrylate; The vinyl monomer is selected from any one or more combinations of styrene, p-methylstyrene or acrylonitrile; The amino-containing (meth)acrylate is selected from any one or more combinations of dimethylaminoethyl methacrylate, 3-dimethylaminopropyl methacrylamide or 2-tert-butylaminoethyl methacrylate; The methoxy polyethylene glycol acrylate is methoxy polyethylene glycol (500) methacrylate; The initiator is selected from any one or more combinations of azobisisobutyronitrile, dibenzoyl peroxide, diisopropylbenzene peroxide, tert-butyl perbenzoate, tert-amyl perbenzoate, tert-butyl peroxy-2-ethylhexanoate, tert-amyl peroxy-2-ethylhexanoate, di-tert-butyl peroxide or di-tert-amyl peroxide.

5. The aviation fluid-resistant water-based coating according to claim 3, characterized in that: The specific steps of the preparation method of the water-based amino-containing acrylate copolymer are as follows: S1. Add a cosolvent into a reaction kettle, introduce nitrogen, stir and heat to a specified temperature, start to dropwise add a mixed monomer of alkyl (meth)acrylate, vinyl monomer, amino-containing (meth)acrylate, methoxy polyethylene glycol acrylate and initiator, and after the dropwise addition is completed, heat preservation is performed to obtain a mixture; S2. Adjust the temperature of the mixture obtained in step S1 to 75-80° C., add glacial acetic acid, stir, and then dropwise add deionized water to obtain a slightly yellowish translucent aqueous amino-containing acrylate copolymer.

6. The aviation fluid-resistant water-based coating according to claim 1, characterized in that: The structure of the silane-modified waterborne epoxy resin is shown in Formula II: The silane-modified waterborne epoxy resin is prepared from the following raw materials in percentage by weight:

7. The aviation fluid-resistant water-based coating according to claim 6, characterized in that: The epoxy resin is selected from any one or more combinations of epoxy resins having an epoxy equivalent of 180 to 550; The polyether monoamine is selected from Huntsman M1000, M2070 or Any one or more combinations of M3085 polyetheramine, The co-solvent is selected from any one or more combinations of propylene glycol methyl ether, ethylene glycol butyl ether or propylene glycol butyl ether.

8. The aviation fluid-resistant water-based coating according to claim 6, characterized in that: The specific steps of the preparation method of the silane-modified waterborne epoxy resin are as follows: S1, adding part of epoxy resin into a reaction kettle, introducing nitrogen, adding γ-aminopropyltriethoxysilane after heating, and adding part of cosolvent after reacting for a period of time to obtain prepolymer A; S2, adding another part of epoxy resin and polyether monoamine into the reaction kettle, introducing nitrogen, heating, and adding another part of cosolvent after reacting for a period of time to obtain prepolymer B; S3, mixing the prepolymer A prepared in step S1 with the prepolymer B prepared in step S2, and stirring them evenly to obtain a silane-modified waterborne epoxy resin.

9. A method for preparing an aviation fluid-resistant water-based coating as claimed in any one of claims 1 to 8, characterized in that: The specific steps are as follows: S1. Preparation of the main agent of primer: S1-1, adding water-based epoxy amine adduct, water-based amino-containing acrylate copolymer, deionized water and dispersant into a paint mixing tank, stirring evenly, adding pigment, anti-rust pigment and filler under low-speed stirring, dispersing at high speed until no raw powder is present, and grinding to obtain slurry; S1-2, adding a wetting agent, a defoaming agent, a co-solvent and a rheological additive to the slurry obtained in step S1-1 in sequence, and stirring at high speed to obtain a main agent of the primer; S2. Main agent for preparing topcoat: S2-1, adding water-based epoxy amine adduct, water-based amino-containing acrylate copolymer, deionized water and dispersant into a paint mixing tank, stirring evenly, adding pigment and filler under low-speed stirring, dispersing at high speed until no raw powder is present, and grinding to obtain slurry; S2-2, adding a wetting agent, a defoaming agent, a cosolvent and a rheological additive to the slurry obtained in step S2-1 in sequence, and stirring at high speed to obtain a main agent for the topcoat; S3. Preparation of curing agent: Add silane-modified waterborne epoxy resin into a paint mixing tank, add epoxy silane under stirring conditions, and obtain a curing agent after high-speed dispersion; S4, mixing the measured main agent and curing agent components of the primer according to the designed ratio to obtain a primer for the aviation fluid-resistant water-based coating; S5. Mix the measured main agent and curing agent components of the topcoat according to the designed ratio to obtain the topcoat of the aviation fluid-resistant water-based coating.

10. An application of the aviation fluid-resistant water-based coating as claimed in any one of claims 1 to 8, characterized in that: The aviation fluid-resistant water-based coating is used for preparing an interior coating, an intermediate coating or an exterior coating of an aircraft body.

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