CN111849289A - Water-based anticorrosive paint and preparation method and application thereof - Google Patents

Abstract

The invention relates to a water-based anticorrosive paint and a preparation method and application thereof. The water-based anticorrosive paint comprises the following components in parts by weight: 60-80 parts of film forming material, 2-3 parts of film forming additive, 1-5 parts of filler, 4-11 parts of functional additive, 0.1-0.3 part of bentonite and 5-10 parts of water; wherein, the film forming material is modified waterborne acrylate polymer emulsion containing carboxyl prepared by adipic dihydrazide, diacetone acrylamide and acrylate monomer through self-crosslinking; the filler has a plate-shaped or needle-shaped structure. The water-based anticorrosive paint is green and environment-friendly, has excellent anticorrosive performance, can effectively prolong the service life of corresponding coating products, can be widely applied to industrial and retail places with light anticorrosive requirements, has excellent adhesive force, can be directly attached to various substrates without using primer, can realize bottom-surface integration in the true sense, and effectively reduces the process complexity of anticorrosive product preparation.

Description

Water-based anticorrosive paint and preparation method and application thereof

Technical Field

The invention relates to the technical field of coatings, in particular to a water-based anticorrosive coating and a preparation method and application thereof.

Background

In recent years, with the development of national economic health, the living quality of people is improved, the living environment is greatly improved, and diversified household interior decorations become indispensable components for decoration, such as fences, chairs, hanging baskets, PVC pipes and the like. However, in the use process of many ornaments in the market, the phenomena of rusting and the like can occur in metal products and the phenomena of yellowing, light loss, corrosion and the like can occur in wood products, so that the attractiveness and the service life are greatly influenced, and the application market of the light anticorrosive paint is huge.

Most of the existing anticorrosive coatings on the market are oily products mainly comprising oily alkyd, and the anticorrosive coatings in the industry are generally industrial anticorrosive coatings, have the problems of high VOC (volatile organic compounds), easy re-adhesion, adhesive force and the like, and are not suitable for occasions requiring light retail anticorrosion. Therefore, the development of an anticorrosive paint suitable for industrial and retail light anticorrosive demand places is urgently needed.

Disclosure of Invention

Based on the above, the invention provides the water-based anticorrosive paint, and the preparation method and the application thereof, the water-based anticorrosive paint is green and environment-friendly, has excellent anticorrosive performance, can effectively prolong the service life of corresponding anticorrosive products, and is suitable for being widely applied to industrial and retail places with light anticorrosive requirements.

The water-based anticorrosive paint comprises the following components in parts by weight:

wherein the film-forming substance is carboxyl-containing modified water-based acrylate polymer emulsion prepared by self-crosslinking adipic dihydrazide, diacetone acrylamide and acrylate monomers; the filler is of a sheet or needle structure.

In one embodiment, the minimum film-forming temperature of the film-forming material is 20-40 ℃; and/or

The pH value of the film forming substance is 7.5-9.0; and/or

The viscosity of the film forming material is 100 mPa.S-300 mPa.S at the temperature of 25 +/-2 ℃.

In one embodiment, the film-forming material is an XK-802 emulsion.

In one embodiment, the filler is one or more of mica powder, talc powder and wollastonite.

In one embodiment, the mass ratio of the film-forming material to the filler is (20-40): 1.

in one embodiment, the water-based anticorrosive paint further comprises 0.1-20 parts of rutile titanium dioxide by weight.

In one embodiment, the functional additive is one or more of a dispersing agent, a wetting agent, a pH regulator, an antifoaming agent, an antirust pigment, a thickening agent, an antirust additive, a hydrophobic additive and an antiseptic and mildew-proof agent.

In one embodiment, the functional assistant at least contains a hydrophobic assistant, and in the water-based anticorrosive coating, the hydrophobic assistant is 1.0-2.0 parts by weight.

In one embodiment, the functional additive is a combination of a dispersing agent, a wetting agent, a pH regulator, a defoaming agent, an antirust pigment, a thickening agent, an antirust additive, a hydrophobic additive and an antiseptic and mildew-proof agent;

in the water-based anticorrosive paint, by weight, 0.5-1.5 parts of a dispersing agent, 0.5-1.0 part of a wetting agent, 0.1-0.3 part of a pH regulator, 0.2-0.5 part of a defoaming agent, 1.0-2.0 parts of an antirust pigment, 0.5-1.5 parts of a thickening agent, 0.5-1.0 part of an antirust auxiliary agent and 0.3-0.8 part of an anticorrosive mildew inhibitor are added.

In one embodiment, the hydrophobic auxiliary agent is wax emulsion, the antirust pigment is Nubirox 302, and the antirust auxiliary agent is FA 179.

The preparation method of the water-based anticorrosive paint comprises the following steps:

and mixing the water, the bentonite, the film forming substance, the film forming additive, the filler and the functional additive to prepare the water-based anticorrosive paint.

In one embodiment, the functional additive is a combination of a dispersing agent, a wetting agent, a pH regulator, a defoaming agent, an antirust pigment, a thickening agent, an antirust additive, a hydrophobic additive and an antiseptic and mildew-proof agent; the water-based anticorrosive paint also comprises rutile type titanium dioxide; the step of mixing the water, bentonite, film-forming substance, film-forming aid, filler and functional aid comprises the following steps:

Dispersing water, a dispersing agent, a wetting agent, bentonite, a pH regulator, a defoaming agent of 1/3-1/2, rutile titanium dioxide, an anti-rust pigment and a filler to prepare first slurry under the condition that the rotating speed is 1500-2000 r/min;

and adding the film forming substance, the antirust pigment, the film forming additive, the antirust additive, the hydrophobic additive, the thickening agent, the anticorrosion mildew inhibitor and the residual defoaming agent into the first slurry, and uniformly dispersing at the rotation speed of 400-600 r/min.

The application of the water-based anticorrosive paint on household ornaments.

An anticorrosive product comprises a substrate and a coating coated on the substrate, wherein the coating is mainly prepared from the water-based anticorrosive paint.

The water-based anticorrosive paint adopts carboxyl-containing modified water-based acrylate polymer emulsion which is mainly formed by self-crosslinking adipic dihydrazide, diacetone acrylamide and acrylate monomer as a film-forming substance, is compounded with a filler with a specific space shape, and is supplemented with bentonite, a film forming aid and a functional aid with specific contents, can form compact paint film, can effectively prolong the early water resistance of the paint film and prolong the time of dirt, moisture and the like entering the paint film, thereby achieving the purpose of prolonging the service life of corresponding anticorrosive products, and the water-based anticorrosive paint is a water-based material, abandons the traditional oil products which mainly use oil alkyd, has low VOC, the coating has a better anticorrosion effect and a higher environmental protection effect, can effectively expand the application field, and can be widely applied to industrial and retail places with light anticorrosion requirements.

In addition, the water-based anticorrosive coating has a simple formula and high stability, does not need cold splicing of various emulsions compared with the traditional styrene-acrylic emulsion water-based coating, reduces the use complexity, has excellent adhesive force, can be directly attached to various substrates without using primer, achieves bottom-surface integration in the true sense, and can effectively reduce the process complexity of preparation of anticorrosive products.

Drawings

FIG. 1 is a schematic drawing of a paint film formed by a film-forming material according to an embodiment of the present invention;

FIG. 2 is a diagram showing the coating states of the paints of example 1 and comparative example 1 of the present invention after salt spray resistance test.

Detailed Description

In order that the invention may be more fully understood, a more particular description of the invention will now be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The water-based anticorrosive paint provided by the invention comprises the following components in parts by weight: 5-10 parts of water, 0.1-0.3 part of bentonite, 60-80 parts of film forming substances, 2-3 parts of film forming additives, 1-5 parts of fillers and 4-11 parts of functional additives; wherein, the film forming material is modified waterborne acrylate polymer emulsion containing carboxyl prepared by adipic dihydrazide, diacetone acrylamide and acrylate monomer through self-crosslinking; the filler has a plate-shaped or needle-shaped structure.

The waterborne anticorrosive paint adopts modified waterborne acrylic ester polymer emulsion containing carboxyl formed by self-crosslinking adipic dihydrazide, diacetone acrylamide and acrylic ester monomer as a film forming substance, is compounded with a filler with a specific space shape, and is supplemented with bentonite, a film forming aid and a functional aid with specific contents, can form compact paint film, can effectively prolong the early water resistance of the paint film and prolong the time of dirt, moisture and the like entering the paint film, thereby achieving the purpose of prolonging the service life of corresponding anticorrosive products, and the water-based anticorrosive paint is a water-based material, abandons the traditional oil products which mainly use oil alkyd, has low VOC, the coating has a better anticorrosion effect and a higher environmental protection effect, can effectively expand the application field, and can be widely applied to industrial and retail places with light anticorrosion requirements. Specifically, the method comprises the following steps:

Metal rusting is a chemical reaction, and besides the active chemical property of metal elements, moisture and oxygen are indispensable conditions. Taking iron as an example, when the compactness of the paint film is insufficient, air is dissolved in water, passes through the paint film and reacts with iron of the base layer in a contact way, and rust is generated. After the iron is completely rusted, the volume can be expanded by 8 times. The spongy iron rust can absorb water more easily, and further the rusting speed of the iron is accelerated. Therefore, the metal base material is isolated from being contacted with air and moisture, and the purpose of preventing the metal base material from being corroded and rusted can be achieved. The surface of a paint film of a general paint has a certain roughness, the larger the surface roughness is, the poorer the compactness of the paint film is, and air and water can pass through the paint film more easily. Therefore, the compactness and the surface hydrophobicity of the paint film are improved, the early water resistance of the paint film can be effectively improved, and the corrosion resistance of the paint film is improved.

Based on the above, the water-based anticorrosive paint disclosed by the invention adopts modified water-based acrylate polymer emulsion synthesized by self-crosslinking adipic Acid Dihydrazide (ADH), diacetone acrylamide (DAAM) and acrylate monomers, and after moisture is volatilized in the emulsion film forming process, a crosslinking film can be formed by bridging among macromolecular chains; the polymer structure network contains a certain amount of carboxyl (see figure 1), the carboxyl can be ionized out and has negative charge in the coating, and the surfaces of the fillers and the substrates have positive charge, so that the molecular chain of the whole polymer can generate certain intermolecular force for the particles of the powder, thereby improving the wrapping property of the film forming substance for the powder, improving the compactness of the paint film, and also enhancing the dispersion stability of the powder in the system and the adhesive force of the paint film for the substrates; and the filler with a flaky or needle-shaped structure is embedded in a cross-linked network formed by the modified water-based acrylate emulsion, and a proper amount of bentonite is added, and the filler is regularly arranged under the action of a film forming substance and a film forming additive, so that the compactness and toughness of the film can be further improved, and the time for water to reach the interior of the paint film can be prolonged.

In addition, in the film forming process of the film forming substance, two soft and hard particles in the polymer structure interact with each other, so that the particles are regularly arranged, and a self-assembly structure similar to a micro-phase separated soft and hard segment region which is arranged at intervals is realized, so that after film forming, the film forming substance has stronger affinity with powder in the components, the effect of the polymer on wrapping the powder is enhanced, the compactness of the paint film is ensured, meanwhile, the paint film has better hardness and flexibility, good adhesive force performance is realized on various base materials, the formed paint film has good compactness, moisture is not easy to enter the paint film, the early hydrophobic property can be effectively prolonged, and the paint film has the advantages of being not easy to be stained and the like.

Moreover, the water-based anticorrosive paint has a simple formula and high stability, does not need cold splicing of various emulsions compared with the traditional styrene-acrylic emulsion water-based paint, reduces the use complexity, has excellent adhesive force, can be directly attached to various substrates, does not need to use primer, achieves bottom-surface integration in the true sense, and can effectively reduce the process complexity of preparing anticorrosive products.

Further, the water-based anticorrosive paint comprises the following components in parts by weight: 5-10 parts of water, 0.15-0.25 part of bentonite, 60-80 parts of film forming substances, 2-3 parts of film forming additives, 1.5-3 parts of fillers and 4-11 parts of functional additives. Further, the mass ratio of the film forming material to the filler is (20-40): 1, further, the mass ratio of the film-forming substance to the filler is (30-40): 1. in the process of research, the technicians find that in the system, the mass ratio of the film forming substance to the filler is controlled within a proper range, so that the compactness of a paint film can be improved, and the production cost is reduced.

It is understood that the modified aqueous acrylate polymer emulsion of the present invention is mainly prepared by self-crosslinking adipic acid dihydrazide, diacetone acrylamide and acrylate monomer, and other substances such as initiator, solvent and the like can be added in the preparation process, and are not particularly limited herein, and the emulsion prepared by the existing preparation method can also contain other substances according to the difference of the production process and the like, and is not contrary to the purpose of the aqueous anticorrosive coating of the present invention, and is not understood to limit the present invention.

It should be noted that the acrylate monomer in the present invention is to be understood in a broad sense, and includes acrylic monomers and methacrylic monomers, and the acrylate monomer in the present invention may be a combination of one or more monomers.

Further, the pH value of the film forming substance is 7.5-9.0; further, the pH of the film-forming material is 8.0 to 8.7.

Further, the viscosity of the film-forming material is 100mPa.S to 300mPa.S at a temperature of 25 ℃. + -. 2 ℃.

Further, the solid content of the film-forming material is 30% to 50%.

Further, the Minimum Film Forming Temperature (MFFT) of the film forming substance is 15-40 ℃, and further, the MFT is 20-40 ℃; further, the MFT is 20 ℃ to 25 ℃; on the basis of matching with other components, the film forming auxiliary agent after film forming almost has no residue, and the problem that a paint film is easy to tack back is solved.

Further, the film forming material is an XK-802 emulsion of DSM.

Furthermore, the filler is one or more of mica powder, talcum powder and wollastonite, wherein the mica powder and the talcum powder are in a sheet structure, the wollastonite is in a needle shape and has better affinity with the film-forming substance, and the mica powder and the talcum powder can be closely and regularly arranged under the film-forming substance to form a compact film together, so that the porosity of a paint surface is reduced, the invasion time of water is avoided or prolonged, and the effect of improving the anticorrosion effect is achieved. In addition, the filler also has acid and alkali resistance, and can effectively improve the tolerance of a paint film.

Furthermore, the water-based anticorrosive paint also comprises rutile type titanium dioxide, and the rutile type titanium dioxide accounts for 0.1-20 parts by weight of the water-based anticorrosive paint so as to improve the covering power.

Furthermore, the functional auxiliary agent is one or more of a dispersing agent, a wetting agent, a pH regulator, a defoaming agent, an antirust pigment, a thickening agent, an antirust auxiliary agent, a hydrophobic auxiliary agent and an antiseptic and mildew-proof agent, and by adding various types of functional auxiliary agents, the comprehensive performance of the paint film can be effectively improved so as to meet various requirements.

It is to be understood that the specific type of each of the functional aids is not particularly limited, and conventional agents can be used.

Furthermore, the functional auxiliary agent at least contains a hydrophobic auxiliary agent, and the hydrophobic auxiliary agent slowly moves to the surface layer of the paint film in the film forming process of the paint film so as to form a hydrophobic surface on the surface of the paint film, prevent water from entering the interior of the paint film until the paint film is contacted with a substrate, prolong the early-stage water resistance, and ensure that the paint film is not easy to be stained; and by adding the hydrophobic auxiliary agent and under the synergistic effect of other components, on one hand, a hydrophobic surface is formed to avoid the residual moisture on a paint film, and on the other hand, a compact film is formed to avoid the residual moisture invasion, so that the anticorrosion effect of the product is further improved.

Further, the hydrophobic auxiliary agent is a wax emulsion; still further, the hydrophobic adjuvant is a WAX emulsion WAX 966.

Furthermore, the functional auxiliary agent at least comprises an antirust pigment and an antirust auxiliary agent so as to improve the antirust function of the paint film. Furthermore, the rust-proof pigment can be selected from Nubirox 302, and the rust-proof auxiliary agent is selected from FA 179. Furthermore, the functional auxiliary agent is a combination of a dispersing agent, a wetting agent, a pH regulator, a defoaming agent, an antirust pigment, a thickening agent, an antirust auxiliary agent, a hydrophobic auxiliary agent and an antiseptic and mildew-proof agent, and in the water-based antiseptic paint, by weight, the dispersing agent is 0.5-1.5 parts, the wetting agent is 0.5-1.0 parts, the pH regulator is 0.1-0.3 parts, the defoaming agent is 0.2-0.5 parts, the antirust pigment is 1.0-2.0 parts, the thickening agent is 0.5-1.5 parts, the antirust auxiliary agent is 0.5-1.0 parts, and the antiseptic and mildew-proof agent is 0.3-0.8 parts.

The invention also provides a preparation method of the water-based anticorrosive paint, which comprises the following steps: and mixing the water, the bentonite, the film forming substance, the film forming additive, the filler and the functional additive to prepare the water-based anticorrosive paint.

Further, the method comprises the following steps:

s101, dispersing water, a dispersing agent, a wetting agent, bentonite, a pH regulator, 1/3-1/2 defoaming agent, rutile titanium dioxide, anti-rust pigment and filler to prepare first slurry under the condition that the rotating speed is 1500-2000 r/min;

s102: and adding a film forming substance, an antirust pigment, a film forming additive, an antirust additive, a hydrophobic additive, a thickening agent, an antiseptic and mildew-proof agent and the rest amount of a defoaming agent into the first slurry, and uniformly dispersing at the rotating speed of 400-600 r/min.

By first making the powder into a slurry and then mixing the slurry with other components in the form of a raw material, the amount of film-forming substances in the formulation can be increased, the amount of water used as a dispersion medium can be reduced, and the product stability can be improved.

The preparation method of the water-based anticorrosive paint is simple, special instruments and equipment and operation skills are not needed, the preparation cost can be effectively reduced, the water-based anticorrosive emulsion prepared by the method has better stability, can be directly used, is suitable for any substrate (such as wall surfaces, wood, metal and the like), realizes real bottom-surface integration, can form a compact paint film, has excellent anticorrosive performance, effectively prolongs the service life of a product, and also has various functions of rust prevention, anti-sticking and the like, and the water-based anticorrosive paint has good adhesive force on various substrates and the adhesive force can reach level 1 through detection; the water resistance is excellent, and the foaming and the falling can be avoided within 250 hours; excellent salt spray resistance, and no rust for more than 300 hours.

The present invention will be described below with reference to specific examples.

Example 1

The formula (in parts by weight) is as follows: 5 parts of deionized water, 1.2 parts of a dispersant (SN 5040), 0.5 part of a wetting agent (LFH), 0.2 part of bentonite (50S), 0.2 part of a pH regulator (Vantex-T), 0.2 part of a defoaming agent (BYK-024), 20 parts of rutile titanium dioxide (R902+), 2.0 parts of a filler (mica powder), 1 part of a rust-proof pigment (Nubirox 302), 60 parts of a modified water-based acrylate emulsion (DSMXK-802 emulsion), 28.4 parts of pigment slurry, 2.5 parts of a film-forming assistant, 0.5 part of a rust-proof assistant (FA 179), 1 part of a hydrophobic assistant (WAX emulsion WAX 966), 0.8 part of a thickening agent, 0.8 part of an antiseptic and mildew inhibitor and 0.2 part of a defoaming agent; see table 1 for details;

the preparation method comprises the following steps:

(1) dispersing water, a dispersing agent, a wetting agent, bentonite, a pH regulator, a defoaming agent of 1/3-1/2, rutile titanium dioxide, an anti-rust pigment and a filler to prepare first slurry under the condition that the rotating speed is 1500-2000 r/min;

(2) and (2) adding the film-forming substance, the antirust pigment, the film-forming additive, the antirust additive, the hydrophobic additive, the thickener, the anticorrosion and mildewproof agent and the residual defoaming agent into the first slurry obtained in the step (1), and uniformly dispersing at the rotation speed of 400-600 r/min to obtain the water-based anticorrosive paint of the embodiment 1.

TABLE 1

Examples 2 to 7

The raw materials and the preparation method of the formula are the same as those of the example 1, and the specific formula proportions are different, which is shown in the table 1.

Comparative example 1

Substantially the same as in example 1 except that the modified aqueous acrylic emulsion was replaced with an equivalent mass of styrene-acrylic emulsion (RS-926W emulsion);

comparative example 2

Essentially the same as example 1, except that the filler was replaced with an equal amount of S4 silica.

Comparative example 3

Essentially the same as example 1, except that the filler was replaced with an equal amount of X7 nepheline powder.

Comparative example 4

The procedure was as in example 4 except that the filler was added in an amount of 6 parts and water was added in an amount of 6 parts.

Effect testing experiment

The coatings of examples 1 to 7 and comparative examples 1 to 3 were tested for tack-back rating, adhesion, water resistance and salt spray resistance, and the results are shown in Table 3

Test standards of each index: GB 18582-. Wherein, the standard for judging the rust grade is as the following table 2:

TABLE 2

Grade of rust	The rust area is full
		Ri 0	0
Ri 1	0.05
		Ri 2	0.5
Ri 3	1
		Ri 4	8
Ri 5	40-50

TABLE 3

As can be seen from Table 1, the water based anticorrosive coatings of examples 1 to 7 did not tack back and had excellent adhesion, water resistance and salt spray resistance, while comparative example 1 using a styrene-acrylic emulsion had much lower tack back rating than the above examples and the VOC of the products of the examples of the present invention was 10g/L or less. The water-based anticorrosive paint is green and environment-friendly, has excellent anticorrosive performance, can effectively prolong the service life of the preparation of corresponding coatings, is particularly suitable for industrial and retail places with light anticorrosive requirements, has excellent adhesive force, can be directly attached to various substrates without using primer, can realize bottom-surface integration in the true sense, and effectively reduces the process complexity of the preparation of anticorrosive products.

FIG. 2 is a photograph of salt spray test of example 1 and comparative example 1, wherein a is example 1 and b is comparative example 1. from FIG. 2, it can be seen that there is no scratch, example 1 has substantially no rust, while comparative example 1 has a large rust area, and even if "X" scratch is added on the coating layer, the corrosion resistance of example 1 is still significantly better than that of comparative example 1, indicating that the aqueous anticorrosive paint of the present invention has excellent corrosion resistance.

Furthermore, comparative example 2, comparative example 3 and example 1 are basically the same, except that the example 1 adopts a platy filler, while the comparative example 2 and comparative example 3 adopt a granular filler, as can be seen from table 2, the corrosion resistance of the two fillers is obviously weaker than that of the example 1, which shows that the components in the water-based anticorrosive coating have a certain synergistic effect, and the filler with a specific form can help to form a compact film, so that the corrosion resistance of the product is improved.

In addition, the mass ratio of the emulsion of example 4 to the filler was 40:1, the mass ratio of the emulsion of example 7 to the filler was 20:1, and the mass ratio of the emulsion of comparative example 4 to the filler was 13: 1. As can be seen from table 3, the anticorrosive effect of the aqueous anticorrosive coatings of examples 4 and 7 is significantly better than that of comparative example 4. The addition amount of the filler influences the corrosion resistance of the coating, and the mass ratio of the emulsion to the filler is preferably controlled within a proper range (20-40: 1) to be beneficial to the formation of a compact film.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. The water-based anticorrosive paint is characterized by comprising the following components in parts by weight:

wherein the film-forming substance is carboxyl-containing modified water-based acrylate polymer emulsion prepared by self-crosslinking adipic dihydrazide, diacetone acrylamide and acrylate monomers; the filler is of a sheet or needle structure.

2. The water-based anticorrosive paint according to claim 1, wherein the minimum film forming temperature of the film forming substance is 20-40 ℃; and/or

The pH value of the film forming substance is 7.5-9.0; and/or

The viscosity of the film forming material is 100 mPa.S-300 mPa.S at the temperature of 25 +/-2 ℃.

3. The aqueous anticorrosive paint of claim 2, wherein the film-forming material is an XK-802 emulsion; and/or

The filler is one or more of mica powder, talcum powder and wollastonite; and/or

The mass ratio of the film-forming substance to the filler is (20-40): 1.

4. the aqueous anticorrosive paint according to claim 1, further comprising 0.1 to 20 parts by weight of rutile type titanium dioxide.

5. The water-based anticorrosive paint according to any one of claims 1 to 4, wherein the functional additive is one or more of a dispersant, a wetting agent, a pH regulator, an antifoaming agent, an anticorrosive pigment, a thickener, an anticorrosive additive, a hydrophobic additive, and an anticorrosive mildewproofing agent.

6. The water-based anticorrosive paint according to claim 5, wherein the functional assistant at least comprises a hydrophobic assistant, and the hydrophobic assistant is 1.0 to 2.0 parts by weight of the water-based anticorrosive paint.

7. The water-based anticorrosive paint according to claim 6, wherein the functional auxiliary is a combination of a dispersant, a wetting agent, a pH regulator, an antifoaming agent, an antirust pigment, a thickener, an antirust auxiliary, a hydrophobic auxiliary and an anticorrosive mildewproof agent;

In the water-based anticorrosive paint, by weight, 0.5-1.5 parts of a dispersing agent, 0.5-1.0 part of a wetting agent, 0.1-0.3 part of a pH regulator, 0.2-0.5 part of a defoaming agent, 1.0-2.0 parts of an antirust pigment, 0.5-1.5 parts of a thickening agent, 0.5-1.0 part of an antirust auxiliary agent and 0.3-0.8 part of an anticorrosive mildew inhibitor are added.

8. The method for preparing the water-based anticorrosive paint according to any one of claims 1 to 7, characterized by comprising the steps of:

and mixing the water, the bentonite, the film forming substance, the film forming additive, the filler and the functional additive to prepare the water-based anticorrosive paint.

9. The preparation method according to claim 8, wherein the functional assistant is a combination of a dispersant, a wetting agent, a pH regulator, an antifoaming agent, an antirust pigment, a thickener, an antirust assistant, a hydrophobic assistant and an antiseptic and antifungal agent; the water-based anticorrosive paint also comprises rutile type titanium dioxide; the step of mixing the water, bentonite, film-forming substance, film-forming aid, filler and functional aid comprises the following steps:

dispersing water, a dispersing agent, a wetting agent, bentonite, a pH regulator, a defoaming agent of 1/3-1/2, rutile titanium dioxide, an anti-rust pigment and a filler to prepare first slurry under the condition that the rotating speed is 1500-2000 r/min;

And adding the film forming substance, the antirust pigment, the film forming additive, the antirust additive, the hydrophobic additive, the thickening agent, the anticorrosion mildew inhibitor and the residual defoaming agent into the first slurry, and uniformly dispersing at the rotation speed of 400-600 r/min.

10. Use of an aqueous corrosion protective coating according to any one of claims 1 to 8 on a household upholstery.

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