CN115403999A - Water-based paint and preparation method thereof - Google Patents
Water-based paint and preparation method thereof Download PDFInfo
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- CN115403999A CN115403999A CN202211269385.2A CN202211269385A CN115403999A CN 115403999 A CN115403999 A CN 115403999A CN 202211269385 A CN202211269385 A CN 202211269385A CN 115403999 A CN115403999 A CN 115403999A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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Abstract
The application relates to the field of water-based paint, in particular to water-based paint and a preparation method thereof. The water-based finish paint comprises the following components in parts by weight: a. 90 to 100 parts of acrylic polyurethane; b. 2 to 5 parts of silica aerogel microspheres modified by a polar modifier; c. and (4) a finishing paint auxiliary agent. The water-based paint formed by the water-based finish paint matched with the water-based primer can effectively play a role in sound insulation and corrosion prevention.
Description
Technical Field
The application relates to the field of water-based paint, in particular to water-based paint and a preparation method thereof.
Background
The metal materials or the equipment of transportation tools, such as ships, vehicles and the like, can be corroded by the environment in service, and the protection of the coating is the most main anticorrosion means of the surfaces of the materials or the equipment, and is the most effective, most economic, most common in application and most easily accepted by engineering designers and users in anticorrosion measures. By coating the organic coating on the surface of the material or equipment, the penetration of corrosive media such as moisture, oxygen and the like can be isolated, and the corrosion rate of the material or equipment can be reduced. The organic paint is divided into oil paint and water paint, the traditional oil paint contains a large amount of Volatile Organic Compounds (VOC), which is toxic to human body and can cause serious pollution to environment, and the adoption of the nontoxic, tasteless, low-carbon and environment-friendly water paint to replace the oil paint is an important direction for the research of the current organic paint.
In the using process of the existing water-based paint, part of the water-based paint can not achieve satisfactory anticorrosion performance, and especially the anticorrosion performance (low-frequency impedance modulus) after long-time use can not be satisfied, so that the existing water-based paint has no advantages in aspects such as that ships need to sail for a long time or motor cars need to run for a long time and the coating frequency of the paint is reduced.
In addition, most of the existing coatings cannot achieve satisfactory sound insulation and heat insulation effects, so that most of the existing conventional methods are to coat a layer of sound insulation and heat insulation material on the surface of a metal material or equipment, and then coat a water-based coating for corrosion prevention, so that the effects of sound insulation, heat insulation and corrosion prevention are finally achieved. But such an approach does not have an advantage in reducing the cost of the coating material.
Disclosure of Invention
The water-based paint can be formed after a water-based finish paint in the water-based paint is matched with a water-based primer for use, can effectively play a role in sound insulation and corrosion prevention, particularly has a sound insulation rate of more than 50dB and a thermal conductivity coefficient of less than 3.5W/(m.K) after being cured at room temperature and is prepared by soaking a water-based finish paint in a 3.5% NaCl solution for 7 days to obtain a low-frequency impedance modulus value of 2 multiplied by 10 7 Ω·cm 2 Above, after soaking for 14d, the low-frequency impedance modulus still can reach 6 × 10 7 Ω·cm 2 As described above.
The first scheme provided by the application is as follows: the water-based paint comprises a water-based primer and a water-based finish paint, wherein the water-based finish paint comprises the following components in parts by weight: a. 90 to 100 parts of acrylic polyurethane; b. 2 to 5 parts of silica aerogel microspheres modified by a polar modifier; c. and (3) a finishing paint auxiliary agent.
Optionally, the component b is obtained by the following preparation method: preparing 2 to 5 parts by weight of silica aerogel microspheres into a silica aerogel microsphere-ethanol solution, adjusting the pH to 1 to 3, adding 10 to 20 parts by weight of a polar modifier, stirring at 90 to 95 ℃ for 6 to 12h, cleaning, and vacuum drying for 10 to 12h to obtain the component b.
Optionally, the polar modifier is any one of urea formaldehyde, phenol formaldehyde, gamma-aminopropyltriethoxysilane, and gamma- (2, 3-glycidoxy) propyltrimethoxysilane.
Optionally, the diameter of the silica aerogel microspheres is 20 to 25 nanometers.
Optionally, the water-based primer comprises 90 to 100 parts by weight of epoxy resin and a primer auxiliary agent.
Optionally, the finishing paint auxiliary agent at least comprises 20 to 25 parts by weight of a curing agent and 15 to 25 parts by weight of a diluent; and/or the primer auxiliary agent at least comprises 20 to 25 weight parts of curing agent and 15 to 25 weight parts of diluent.
Optionally, the finishing paint auxiliary agent further comprises 2 to 3 parts by weight of an antifoaming agent, 1 to 2 parts by weight of a dispersing agent and 3 to 4 parts by weight of a flatting agent; and/or the primer auxiliary agent also comprises 2 to 3 weight parts of an antifoaming agent, 1 to 2 weight parts of a dispersing agent and 3 to 4 weight parts of a flatting agent.
Optionally, the curing agent is an aqueous curing agent; or the diluent is water; or the defoaming agent comprises one or more of an organic silicon defoaming agent, a polyether organic silicon compound defoaming agent and a silicon ether co-clustering defoaming agent; or the dispersant comprises one or more of anionic dispersant, cationic dispersant, nonionic dispersant and amphoteric dispersant; or the flatting agent comprises one or more of an organic silicon flatting agent, a fluorocarbon flatting agent and an acrylic flatting agent.
The application also provides a second scheme, namely the preparation method of the water-based paint, and the preparation of the water-based finish paint comprises the following steps: s1, putting the component b into the component a, and fully and uniformly stirring to obtain a mixture 1; s2, mixing and uniformly stirring the finishing paint auxiliary agent to obtain a mixture 2; and S3, adding the mixture 2 into the mixture 1, and fully and uniformly stirring to obtain the water-based finish paint.
The water-based paint formed by matching the water-based finish paint with the water-based primer paint can effectively play a role in sound insulation and corrosion prevention, particularly after the water-based finish paint is cured at room temperature, the sound insulation rate of more than 50dB can be achieved when the water-based finish paint is 200 microns thick, the thermal conductivity of the water-based finish paint is less than 3.5W/(m.K), and the low-frequency impedance modulus value of the water-based finish paint soaked in 3.5% NaCl solution for 7d reaches 2 multiplied by 10 7 Ω·cm 2 Above, after soaking for 14 days, the low-frequency impedance module value can still reach 6 multiplied by 10 7 Ω·cm 2 The above.
Drawings
FIG. 1 is a graph comparing structural analyses of an aqueous coating without silica aerogel microspheres (blank), an aqueous coating with silica aerogel microspheres (hydrophobic), and an aqueous coating with urea-formaldehyde modified silica aerogel microspheres (hydrophilic);
FIG. 2 is a graph comparing electrochemical impedance performance of a water-based paint without silica aerogel microspheres (blank), a water-based paint with silica aerogel microspheres (hydrophobic), and a water-based paint with urea-formaldehyde modified silica aerogel microspheres (hydrophilic);
FIG. 3 is a graph comparing contact angle performance of an aqueous coating without silica aerogel microspheres (blank), an aqueous coating with silica aerogel microspheres (hydrophobic), and an aqueous coating with urea-formaldehyde modified silica aerogel microspheres (hydrophilic);
FIG. 4 is a comparison of the salt spray resistance of a water-based paint without silica aerogel microspheres (blank), a water-based paint with silica aerogel microspheres (hydrophobic), and a water-based paint with urea-formaldehyde modified silica aerogel microspheres (hydrophilic);
fig. 5 is a graph comparing adhesion performance of a water-based paint without silica aerogel microspheres (blank), a water-based paint with silica aerogel microspheres (hydrophobic), and a water-based paint with urea-formaldehyde modified silica aerogel microspheres (hydrophilic).
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, as generally described and illustrated herein, may be arranged and designed in a wide variety of different configurations.
The following is a detailed illustration of the scheme of the present application:
the filler modification is the most effective means for improving the corrosion resistance of the coating, the nano filler is added into the coating, a certain effect of blocking the diffusion of corrosive ions can be achieved, meanwhile, the added functional filler can endow the coating with more functions, and the aerogel is a light nano solid material which has a nano porous network structure and is filled with a large amount of gaseous dispersion media in a network framework. Aerogel materials have a wide range of uses, thanks to their structural particularity, among which silica aerogel materials are based on aerogel technology on SiO 2 Compared with other aerogel materials, the silicon dioxide aerogel has the advantages of rich raw material sources, simple process, good controllability, higher porosity and lower size, can reflect and refract sound waves, and shows excellent characteristics of sound insulation, heat insulation, high specific surface area and the like. However, the surface of the silica aerogel has strong hydrophobicity and is easy to agglomerate, the dispersibility in a water-based coating system is poor, the polar groups are grafted on the surface of the surfactant to modify the silica aerogel so as to improve the hydrophilicity of the silica aerogel and the compatibility of a coating, but the silica aerogel obtained by the conventional modification material and modification method cannot obtain good sound insulation, heat insulation and corrosion prevention effects when being applied to the field of water-based coatings, even though the conventional water-based coatings are adoptedAfter the modification mode, the silicon dioxide aerogel in the obtained water-based paint is not stable enough, and the performance of the obtained water-based paint is not obviously improved.
Therefore, the water-based paint provided by the application comprises a water-based primer and a water-based finish paint, wherein the water-based finish paint mainly comprises the following components in parts by weight: a. 90 to 100 parts of acrylic polyurethane; b. 2 to 5 parts of silica aerogel microspheres modified by a polar modifier; c. and (3) a finishing paint auxiliary agent.
The component b can be obtained by the following preparation method: preparing 2-5 parts by weight of silica aerogel microspheres into a silica aerogel microsphere-ethanol solution, adjusting the pH to 1-3, adding 10-20 parts by weight of a polar modifier, stirring at 90-95 ℃ for 6-12h, cleaning, and vacuum drying for 10-12h to obtain the component b. The polar modifier is any one of urea formaldehyde, phenolic aldehyde, gamma-aminopropyltriethoxysilane and gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane.
The water-based finish paint obtained by the method can also be obtained by the following preparation method: s1, putting the component b into the component a, and fully and uniformly stirring to obtain a mixture 1; s2, mixing and uniformly stirring the finishing paint auxiliary agent to obtain a mixture 2; and S3, adding the mixture 2 into the mixture 1, and fully and uniformly stirring to obtain the water-based finish paint.
The prepared water-based finish paint can be coated on the surface of a material together with the conventional water-based primer, and a protective coating can be formed on the surface of the material after natural air drying, so that the sound insulation and corrosion prevention effects are achieved; for purposes of this application, the following primer-containing waterborne coatings may also be employed: the water-based primer comprises 90-100 parts by weight of epoxy resin and a primer auxiliary agent.
In the present application, the auxiliary agent can be contained in both the water-based finish paint and the water-based primer, and is respectively a finish paint auxiliary agent and a primer paint auxiliary agent. The auxiliary agent can be a curing agent and can also contain a diluent. Further, a defoaming agent, a dispersing agent, and a leveling agent may be preferably contained. Wherein the curing agent is a water-based curing agent; the diluent is water; the defoaming agent comprises one or more of an organic silicon defoaming agent, a polyether organic silicon compound defoaming agent and a silicon ether co-clustering defoaming agent; the dispersant comprises one or more of anionic dispersant, cationic dispersant, nonionic dispersant and amphoteric dispersant; the leveling agent comprises one or more of an organic silicon leveling agent, a fluorocarbon leveling agent and an acrylic leveling agent. More preferably, in the water-based finishing coat or the water-based primer, the weight part of the curing agent can be preferably 20 to 25 parts, the weight part of the diluent can be preferably 15 to 25 parts, the weight part of the defoaming agent can be preferably 2 to 3 parts, the weight part of the dispersing agent can be preferably 1 to 2 parts, and the weight part of the leveling agent can be preferably 3 to 4 parts.
In the above preparation method, the sources of the adopted basic raw materials can be obtained by means of commercial purchase.
To better illustrate the advantages of the waterborne coatings obtained in the present application in sound insulation and corrosion protection, three experimental groups are shown below: the water-based paint without silica aerogel microspheres (blank), the water-based paint with silica aerogel microspheres (hydrophobic) and the water-based paint with urea-formaldehyde modified silica aerogel microspheres (hydrophilic) are respectively used for verifying the structural characteristics and performance effects, the specific preparation method is different from the added silica aerogel microspheres, other steps refer to the preparation method, the water-based primer and the water-based finish paint, and the adopted material components, structural characteristics, process parameters and the like refer to the following explanations.
Water-based primer:
adding Y1 weight part of curing agent into Z1 weight part of diluent, and fully stirring and uniformly mixing to obtain a mixture 1; adding other auxiliary agents (such as 2 to 3 parts by weight of an antifoaming agent, 1 to 2 parts by weight of a dispersing agent and 3 to 4 parts by weight of a leveling agent) into the mixture 1, and stirring uniformly to obtain a mixture 2; and adding X1 part by weight of water-based epoxy resin into the mixture 2, fully and uniformly stirring, and carrying out ultrasonic treatment for 30-35min to obtain the water-based primer.
Water-based finish paint:
preparing L parts by weight of silicon dioxide aerogel microspheres into a silicon dioxide aerogel microsphere-ethanol solution, adjusting the pH to 1 to 3, adding S parts by weight of a polar modifier, stirring at 90 to 95 ℃ for 6 to 12h, cleaning, and vacuum drying for 10 to 12h to obtain the silicon dioxide aerogel microspheres modified by the polar modifier; the polar modifier can be any one of urea formaldehyde, phenolic aldehyde, gamma-aminopropyltriethoxysilane and gamma- (2, 3-epoxypropoxy) propyl trimethoxysilane.
Adding M parts by weight of silica aerogel microspheres modified by a polar modifier into X2 parts by weight of acrylic polyurethane, and uniformly stirring and mixing to obtain a mixture 1; adding Y2 parts by weight of finish paint curing agent into Z2 parts by weight of diluent, and fully stirring and uniformly mixing to obtain a mixture 2; adding other auxiliary agents (such as 2 to 3 parts by weight of an antifoaming agent, 1 to 2 parts by weight of a dispersing agent and 3 to 4 parts by weight of a leveling agent) into the mixture 2, and stirring uniformly to obtain a mixture 3; and adding the mixture 3 into the mixture 1, and uniformly stirring to obtain the water-based finish paint.
In the preparation method, the curing agent is a water-based curing agent; the diluent is water; the defoaming agent comprises one or more of an organic silicon defoaming agent, a polyether organic silicon compound defoaming agent and a silicon ether co-clustering defoaming agent; the dispersing agent comprises one or more of anionic dispersing agent, cationic dispersing agent, nonionic dispersing agent and amphoteric dispersing agent; the leveling agent comprises one or more of an organic silicon leveling agent, a fluorocarbon leveling agent and an acrylic leveling agent.
The preparation method of the hydrophilic group water-based paint is as described above; the preparation method of the hydrophobic group water-based paint comprises the steps of replacing the silicon dioxide aerogel microspheres modified by the polar modifier with the unmodified silicon dioxide aerogel microspheres, and keeping the other steps and parameters unchanged; the preparation method of the blank group of water-based paint does not change other steps and parameters except that the silicon dioxide aerogel microspheres modified by the polar modifier are not added.
The water-based paint of different examples was prepared by using different values of X1, Y1, Z1, L, S, M, X2, Y2, and Z2, and the specific data parameters of the various examples prepared according to the above preparation method are shown in the following table:
coating the prepared water-based primer of each embodiment on the surface of a material, and after the primer is dried, coating the water-based finish paint of each embodiment and drying; the blank group uses the parameters of example 1, but no silica aerogel microspheres are added, i.e. the blank example; the hydrophobic group also used the parameters of example 1, but silica aerogel microspheres that were not polarity modified, i.e., the hydrophobic example; the three layers are all coated with the same thickness, the total thickness is 200 microns, the thickness of the primer is 100 microns, and the thickness of the finish paint is 100 microns. The detection of each embodiment respectively proves the advantages of the water-based paint prepared by the preparation method, and the specific detection indexes comprise structural analysis, electrochemical impedance performance, contact angle performance, salt spray resistance performance and adhesive force performance of three experimental groups; the comparison graph of each detection index of the three experimental groups can be specifically referred to fig. 1 to 5. The detection mode of each detection index and the corresponding drawings are as follows:
structural analysis:
the structural analysis and detection are respectively carried out by adopting the embodiment 1, the blank embodiment and the hydrophobic embodiment, and the obtained structural analysis result is basically shown in figure 1.
Electrochemical impedance performance:
electrochemical impedance performance tests are respectively carried out by adopting the embodiment 1, the blank embodiment and the hydrophobic embodiment, and the obtained analysis results are basically shown in figure 2.
Contact Angle Performance:
the contact angle performance tests of the embodiment 1, the blank embodiment and the hydrophobic embodiment of the present application are performed, and the obtained results are substantially shown in fig. 3.
Salt spray resistance:
salt spray resistance tests are respectively carried out by adopting the embodiment 1, the blank embodiment and the hydrophobic embodiment, and the obtained results are basically shown in figure 4.
Adhesive force performance:
the adhesion performance tests were performed using the present application, example 1, the blank example, and the hydrophobic example, and the obtained results are substantially shown in fig. 5.
According to the above detection method, for the water-based paint of different embodiments obtained by the hydrophilic experimental group, the low-frequency impedance modulus, the sound insulation rate and the heat conductivity coefficient are respectively determined according to the existing detection method, and the detailed obtained data are shown in the following table:
from the data and the chart, the water-based paint has more obvious performance advantages in the fields of sound insulation and corrosion prevention, and is more suitable for being used in the extreme ocean environment. Especially after curing at room temperature, the sound insulation rate of more than 50dB can be achieved when the material is 200 microns thick, the thermal conductivity coefficient is less than 3.5W/(m.K), and the low-frequency impedance modulus value of the material soaked in 3.5% NaCl solution for 7d reaches 2 x 10 7 Ω·cm 2 Above, after soaking for 14 days, the low-frequency impedance module value can still reach 6 multiplied by 10 7 Ω·cm 2 The above.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (9)
1. The water-based paint is characterized by comprising a water-based primer and a water-based finish paint, wherein the water-based finish paint comprises the following components in parts by weight: a. 90 to 100 parts of acrylic polyurethane; b. 2 to 5 parts of silica aerogel microspheres modified by a polar modifier; c. and (4) a finishing paint auxiliary agent.
2. The aqueous coating material according to claim 1, wherein the component b is obtained by the following preparation method: preparing 2 to 5 parts by weight of silica aerogel microspheres into a silica aerogel microsphere-ethanol solution, adjusting the pH to 1 to 3, adding 10 to 20 parts by weight of a polar modifier, stirring at 90 to 95 ℃ for 6 to 12h, cleaning, and vacuum drying for 10 to 12h to obtain the component b.
3. The water-based paint of claim 1, wherein the polar modifier is any one of urea formaldehyde, phenol formaldehyde, gamma-aminopropyltriethoxysilane, and gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane.
4. The water-based paint as claimed in claim 1, wherein the silica aerogel microspheres have a diameter of 20 to 25 nm.
5. The water-based paint of claim 1, wherein the water-based primer comprises 90 to 100 parts by weight of epoxy resin and a primer assistant.
6. The water-based paint as claimed in any one of claims 1 or 5, wherein the finishing paint auxiliary agent at least comprises 20-25 parts by weight of curing agent and 15-25 parts by weight of diluent; and/or the primer auxiliary agent at least comprises 20 to 25 parts by weight of a curing agent and 15 to 25 parts by weight of a diluent.
7. The water-based paint as claimed in claim 6, wherein the finishing paint auxiliary agent further comprises 2 to 3 parts by weight of an antifoaming agent, 1 to 2 parts by weight of a dispersant, and 3 to 4 parts by weight of a leveling agent; and/or the primer auxiliary agent further comprises 2 to 3 parts by weight of an antifoaming agent, 1 to 2 parts by weight of a dispersant, and 3 to 4 parts by weight of a leveling agent.
8. The water-based paint according to claim 7, wherein the curing agent is a water-based curing agent; or the diluent is water; or the defoaming agent comprises one or more of an organic silicon defoaming agent, a polyether organic silicon compound defoaming agent and a silicon ether co-clustering defoaming agent; or the dispersing agent comprises one or more of anionic dispersing agent, cationic dispersing agent, nonionic dispersing agent and amphoteric dispersing agent; or the flatting agent comprises one or more of an organic silicon flatting agent, a fluorocarbon flatting agent and an acrylic flatting agent.
9. The preparation method of the water-based paint in claim 1, wherein the preparation of the water-based finish paint comprises the following steps: s1, putting the component b into the component a, and fully and uniformly stirring to obtain a mixture 1; s2, mixing and uniformly stirring the finishing paint auxiliary agent to obtain a mixture 2; and S3, adding the mixture 2 into the mixture 1, and fully and uniformly stirring to obtain the water-based finish paint.
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