CN112094560A - Modified anticorrosive paint and preparation method thereof - Google Patents
Modified anticorrosive paint and preparation method thereof Download PDFInfo
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- CN112094560A CN112094560A CN202010990342.8A CN202010990342A CN112094560A CN 112094560 A CN112094560 A CN 112094560A CN 202010990342 A CN202010990342 A CN 202010990342A CN 112094560 A CN112094560 A CN 112094560A
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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
- C09D151/00—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
- C09D151/08—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/10—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers containing more than one epoxy radical per molecule
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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
- C09D7/43—Thickening agents
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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
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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
- C09D7/63—Additives non-macromolecular organic
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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
- C09D7/65—Additives macromolecular
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/16—Halogen-containing compounds
- C08K2003/162—Calcium, strontium or barium halides, e.g. calcium, strontium or barium chloride
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Abstract
The invention belongs to the technical field of metal protection materials, and particularly relates to a modified anticorrosive paint and a preparation method thereof. The product developed by the invention comprises a component A and a component B; wherein the component A comprises the following raw materials in parts by weight: 80-100 parts of water-based acrylic modified epoxy resin, 60-80 parts of water, 8-10 parts of urea, 3-8 parts of thickening agent and 0.1-0.3 part of soluble calcium salt; wherein the component B comprises the following raw materials in parts by weight: 10-15 parts of epoxy resin curing agent, 1-3 parts of urease and 30-50 parts of water; when the modified anticorrosive paint is used, the components A and B are mixed according to the mass ratio of 3: 1-5: 1, mixing and reusing. The product obtained by the invention can form firm physical anchoring with a metal substrate, and can form a compact anti-corrosion coating on the metal surface to effectively protect the metal.
Description
Technical Field
The invention belongs to the technical field of metal protection materials. More particularly, relates to a modified anticorrosive paint and a preparation method thereof.
Background
At present, the technical development direction of the anticorrosive paint mainly focuses on water-based, powder and high-solid, and the solvent type anticorrosive paint with low solid content gradually exits from the paint market with increasingly strong competition. The water-based anticorrosive coating is a substitute of a solvent-based anticorrosive coating, uses cheap and environment-friendly water as a solvent, is a renewable resource, has no adverse effect on people and air, is non-combustible and non-explosive, and improves the safety of the coating in production, storage and transportation.
The existing adopted water-based anticorrosive paint comprises the following components:
1. a water-based epoxy coating. The paint is a common anticorrosive paint in water paint, and is mainly composed of two components, namely hydrophobic epoxy resin and hydrophilic amine curing agent. In the manufacturing process, the difference between the epoxy resin and the epoxy resin is that the proportion of the curing agent added to the epoxy resin is different, which limits the application of the epoxy resin to some extent.
2. A water-based acrylic coating. The coating is composed of three monomer materials to form an acrylic polymer, and the acrylic polymer is used as a base material, and water is used as a dispersing agent. The water-based acrylic paint forms a coating in the process of mutual reaction of water and polymer, and the coating presents a net structure and plays a role in protecting the surface of a substrate. The paint has strong water resistance and weather resistance, the surface layer of the base material is not easy to yellow, and the paint can be dried completely without long time, and can be used at normal temperature. This not only improves the corrosion resistance of the substrate, but also can better protect the glossiness of the substrate surface. However, under the influence of acrylic materials, the water-based acrylic paint has the defect of 'pseudo-thickness', which greatly influences the anticorrosion effect of the paint on the substrate.
Therefore, the development of an anticorrosive coating can effectively form long-term stable adhesion with a metal substrate while improving the anticorrosive performance of the substrate, and is one of the technical problems to be solved by technical personnel in the field.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects and the defects that the existing metal anticorrosive paint is difficult to form long-term stable adhesion with a metal substrate in the using process, so that the paint is easy to peel off in the using process and the anticorrosive performance is influenced, and provides a modified anticorrosive paint and a preparation method thereof.
The invention aims to provide a modified anticorrosive paint.
The invention also aims to provide a preparation method of the modified anticorrosive paint.
The above purpose of the invention is realized by the following technical scheme:
a modified anticorrosive paint comprises a component A and a component B;
the component A comprises the following raw materials in parts by weight: 80-100 parts of water-based acrylic modified epoxy resin, 60-80 parts of water, 8-10 parts of urea, 3-8 parts of thickening agent and 0.1-0.3 part of soluble calcium salt;
the component B comprises the following raw materials in parts by weight: 10-15 parts of epoxy resin curing agent, 1-3 parts of urease and 30-50 parts of water;
when the modified anticorrosive paint is used, the components A and B are mixed according to the mass ratio of 3: 1-5: 1, mixing and reusing.
According to the technical scheme, the two-component coating is adopted, firstly, in the preparation process of the product, part of urea reacts with residual carboxyl in the molecular structure of the waterborne acrylic modified epoxy resin to ionize the carboxyl, so that the hydrophilic property of the epoxy resin is improved, and the epoxy resin can be well compatible with a metal substrate; the ionized carboxyl can play a good role in chelating free metal ions on the surface of the metal substrate; in addition, in the actual use process, urease is used as urea hydrolase, urea can be hydrolyzed to form carbon dioxide and ammonia gas, carbon dioxide is dissolved in water to form carbonate ions, and the carbonate ions are combined with calcium ions and metal surface free metal ions to form carbonate crystals, so that the carbonate crystal layers are self-assembled on the surfaces of the metal base materials under the assistance of the thickening agent to form the carbonate crystal layers in situ, and the carbonate crystal layers and the metal base materials can be organically combined along with the curing reaction of the epoxy resin in the crystal layer forming process, so that the epoxy resin is anchored on the surfaces of the metal base materials by utilizing the formation of the crystal layers to form firm combination.
Preferably, the thickening agent is at least one of CMC, polyvinylpyrrolidone, acacia, sodium polyacrylate and sepiolite.
Preferably, the thickener is sepiolite; the sepiolite is isocyanate modified sepiolite.
Preferably, the soluble calcium salt is at least one of calcium nitrate and calcium chloride.
Preferably, the epoxy resin curing agent is an acidic curing agent; the acidic curing agent is at least one of tannic acid and phytic acid.
According to the technical scheme, tannic acid and phytic acid are used as epoxy resin curing agents, and the functions of inducing self-assembly of metal carbonate crystals on the metal surface can be achieved while epoxy resin curing is induced, so that a physical anchoring layer is formed on the surfaces of metal carbonate and a metal substrate in situ.
A preparation method of a modified anticorrosive paint comprises the following specific preparation steps:
preparation of waterborne acrylic modified epoxy resin:
according to the weight parts, 5-10 parts of acrylic acid, 3-5 parts of methyl methacrylate, 4-8 parts of butyl acrylate, 40-50 parts of propylene glycol methyl ether, 1-3 parts of benzoyl peroxide and 40-60 parts of epoxy resin E-42 are taken in sequence;
firstly, mixing and dissolving epoxy resin E-42 and propylene glycol methyl ether, then adding benzoyl peroxide, acrylic acid, methyl methacrylate and butyl acrylate, heating, stirring, reacting, and cooling to obtain water-based acrylic acid modified epoxy resin;
preparation of a coating component A:
according to the parts by weight, 80-100 parts of water-based acrylic acid modified epoxy resin, 60-80 parts of water, 8-10 parts of urea, 3-8 parts of thickening agent and 0.1-0.3 part of soluble calcium salt are taken in sequence; firstly, uniformly stirring and mixing a thickening agent and water, then adding the aqueous acrylic acid modified epoxy resin, soluble calcium salt and urea, and continuously stirring and uniformly mixing to obtain a component A;
preparation of a coating component B:
according to the parts by weight, sequentially taking 10-15 parts of epoxy resin curing agent, 1-3 parts of urease and 30-50 parts of water; stirring and mixing uniformly to obtain a component B;
the component A and the component B are mixed according to the mass ratio of 3: 1-5: 1, packaging separately to obtain the product.
Preferably, the thickening agent is at least one of CMC, polyvinylpyrrolidone, acacia, sodium polyacrylate and sepiolite.
Preferably, the specific preparation steps further comprise:
modification of sepiolite:
mixing sepiolite and hydrochloric acid according to a mass ratio of 1: 5-1: 10, after mixed hydrothermal reaction, filtering, washing and drying to obtain pretreated sepiolite;
the pretreated sepiolite and isocyanate are mixed according to the mass ratio of 5: 1-10: 1, adding the mixture into a ball milling tank, carrying out ball milling mixing for 36-48h, discharging and drying to obtain the isocyanate modified sepiolite.
According to the technical scheme, the ball milling effect is utilized, so that crystal water between layers of the pretreated sepiolite is removed, the generated water reacts with isocyanate which diffuses and permeates into the sepiolite, carbon dioxide and carbamate are generated in the reaction process, the carbon dioxide can enable the sepiolite to expand rapidly, and the carbamate can form organic groups in pores in the sepiolite, so that the adhesion force between the sepiolite and the epoxy resin base material is improved; in addition, the expanded sepiolite can further improve the storage stability of the product, and effectively avoid sedimentation in the storage process; and in the process of mixing and using, the crystal growth inducer can also be used for inducing the crystal to be combined with the expanded sepiolite so as to improve the interaction force of physical riveting.
Preferably, the soluble calcium salt is at least one of calcium nitrate and calcium chloride.
Preferably, the epoxy resin curing agent is an acidic curing agent; the acidic curing agent is at least one of tannic acid and phytic acid.
The invention has the following beneficial effects:
the product obtained by the invention can form firm physical anchoring with a metal substrate, and can form a compact anti-corrosion coating on the metal surface to effectively protect the metal.
Detailed Description
The present invention is further illustrated by the following specific examples, which are not intended to limit the invention in any way. Reagents, methods and apparatus used in the present invention are conventional in the art unless otherwise indicated.
Unless otherwise indicated, reagents and materials used in the following examples are commercially available.
Example 1
Preparation of waterborne acrylic modified epoxy resin:
according to the weight parts, 5 parts of acrylic acid, 3 parts of methyl methacrylate, 4 parts of butyl acrylate, 40 parts of propylene glycol methyl ether, 1 part of benzoyl peroxide and 40 parts of epoxy resin E-42 are taken in sequence;
firstly, mixing and dissolving epoxy resin E-42 and propylene glycol methyl ether, then adding benzoyl peroxide, acrylic acid, methyl methacrylate and butyl acrylate, heating and stirring for reaction for 5 hours at the temperature of 75 ℃ and the rotating speed of 600r/min, and cooling to obtain water-based acrylic acid modified epoxy resin;
modification of sepiolite:
mixing sepiolite and 5% hydrochloric acid according to a mass ratio of 1: 5, mixing, carrying out hydrothermal reaction for 2 hours at the temperature of 160 ℃ and under the pressure of 2MPa, filtering, washing and drying to obtain pretreated sepiolite;
the pretreated sepiolite and toluene diisocyanate are mixed according to the mass ratio of 5: 1, mixing, adding into a ball milling tank, ball milling and mixing for 36 hours at the rotating speed of 500r/min, discharging, and drying to obtain isocyanate modified sepiolite;
preparation of a coating component A:
according to the weight parts, 80 parts of aqueous acrylic acid modified epoxy resin, 60 parts of water, 8 parts of urea, 3 parts of isocyanate modified sepiolite and 0.1 part of soluble calcium salt are taken in sequence; firstly, stirring and mixing isocyanate modified sepiolite and water for 2 hours by using a stirrer at the rotating speed of 300r/min, then adding waterborne acrylic acid modified epoxy resin, soluble calcium salt and urea, and continuously stirring and mixing for 3 hours to obtain a component A;
preparation of a coating component B:
according to the weight parts, 10 parts of epoxy resin curing agent, 1 part of urease and 30 parts of water are taken in sequence; stirring and mixing for 45min at the rotating speed of 200r/min by using a stirrer to obtain a component B;
the component A and the component B are mixed according to the mass ratio of 3: 1, packaging separately to obtain a product;
the soluble calcium salt is calcium nitrate;
the epoxy resin curing agent is an acidic curing agent; the acidic curing agent is tannic acid.
Example 2
Preparation of waterborne acrylic modified epoxy resin:
according to the weight parts, sequentially taking 8 parts of acrylic acid, 4 parts of methyl methacrylate, 5 parts of butyl acrylate, 45 parts of propylene glycol methyl ether, 2 parts of benzoyl peroxide and 45 parts of epoxy resin E-42;
firstly, mixing and dissolving epoxy resin E-42 and propylene glycol methyl ether, then adding benzoyl peroxide, acrylic acid, methyl methacrylate and butyl acrylate, heating and stirring for reaction for 6 hours at the temperature of 80 ℃ and the rotating speed of 700r/min, and cooling to obtain water-based acrylic acid modified epoxy resin;
modification of sepiolite:
mixing sepiolite and 8% hydrochloric acid according to a mass ratio of 1: 8, mixing, carrying out hydrothermal reaction for 3 hours at the temperature of 170 ℃ and under the pressure of 3MPa, filtering, washing and drying to obtain pretreated sepiolite;
the pretreated sepiolite and toluene diisocyanate are mixed according to the mass ratio of 6: 1, mixing, adding into a ball milling tank, ball milling and mixing for 42h at the rotation speed of 550r/min, discharging, and drying to obtain isocyanate modified sepiolite;
preparation of a coating component A:
according to the weight parts, 90 parts of aqueous acrylic acid modified epoxy resin, 70 parts of water, 9 parts of urea, 5 parts of isocyanate modified sepiolite and 0.2 part of soluble calcium salt are taken in sequence; firstly, stirring and mixing isocyanate modified sepiolite and water for 6 hours by using a stirrer at the rotating speed of 500r/min, then adding waterborne acrylic acid modified epoxy resin, soluble calcium salt and urea, and continuously stirring and mixing for 4 hours to obtain a component A;
preparation of a coating component B:
according to the weight parts, sequentially taking 12 parts of epoxy resin curing agent, 2 parts of urease and 35 parts of water; stirring and mixing for 50min at the rotating speed of 300r/min by using a stirrer to obtain a component B;
the component A and the component B are mixed according to the mass ratio of 4: 1, packaging separately to obtain a product;
the soluble calcium salt is calcium chloride;
the epoxy resin curing agent is an acidic curing agent; the acidic curing agent is phytic acid.
Example 3
Preparation of waterborne acrylic modified epoxy resin:
according to the weight parts, 10 parts of acrylic acid, 5 parts of methyl methacrylate, 8 parts of butyl acrylate, 50 parts of propylene glycol methyl ether, 3 parts of benzoyl peroxide and 60 parts of epoxy resin E-42 are taken in sequence;
firstly, mixing and dissolving epoxy resin E-42 and propylene glycol methyl ether, then adding benzoyl peroxide, acrylic acid, methyl methacrylate and butyl acrylate, heating and stirring for reaction for 8 hours at the temperature of 85 ℃ and the rotating speed of 800r/min, and cooling to obtain water-based acrylic acid modified epoxy resin;
modification of sepiolite:
mixing sepiolite and 10% hydrochloric acid according to a mass ratio of 1: 10, after mixing, carrying out hydrothermal reaction for 4 hours at the temperature of 180 ℃ and under the pressure of 4MPa, filtering, washing and drying to obtain pretreated sepiolite;
the pretreated sepiolite and toluene diisocyanate are mixed according to the mass ratio of 10: 1, mixing, adding into a ball milling tank, ball milling and mixing for 48 hours at the rotating speed of 600r/min, discharging, and drying to obtain isocyanate modified sepiolite;
preparation of a coating component A:
according to the weight parts, 100 parts of waterborne acrylic modified epoxy resin, 80 parts of water, 10 parts of urea, 8 parts of isocyanate modified sepiolite and 0.3 part of soluble calcium salt are taken in sequence; firstly, stirring and mixing isocyanate modified sepiolite and water for 4 hours by a stirrer at the rotating speed of 600r/min, then adding waterborne acrylic acid modified epoxy resin, soluble calcium salt and urea, and continuously stirring and mixing for 5 hours to obtain a component A;
preparation of a coating component B:
according to the parts by weight, 15 parts of epoxy resin curing agent, 3 parts of urease and 50 parts of water are taken in sequence; stirring and mixing for 60min at the rotating speed of 400r/min by using a stirrer to obtain a component B;
the component A and the component B are mixed according to the mass ratio of 5: 1, packaging separately to obtain a product;
the soluble calcium salt is calcium nitrate;
the epoxy resin curing agent is an acidic curing agent; the acidic curing agent is tannic acid.
Comparative example 1
This comparative example differs from example 1 in that: no urea and urease were added, and the remaining conditions were maintained.
Comparative example 2
This comparative example differs from example 1 in that: substituting tannic acid with equal mass of aliphatic diamine, and keeping the rest conditions unchanged.
Comparative example 3
This comparative example differs from example 1 in that: CMC with equal mass is adopted to replace isocyanate modified sepiolite, and other conditions are kept unchanged.
The products obtained in examples 1 to 3 and comparative examples 1 to 3 were tested for their properties, and the specific test methods and test results are as follows:
the adhesion (cross-hatch) and water resistance of the coating were tested according to GB/T9286-1998 and GB/T1733-1993, respectively; testing the neutral salt spray resistance of the coating film according to GB/T1771-2007; the specific test results are shown in table 1:
table 1: and the product performance test result is as follows:
| adhesion/grade | Water resistance/h | Neutral salt fog resistance per hour | |
| Example 1 | 5 | 380 | 260 |
| Example 2 | 5 | 390 | 280 |
| Example 3 | 5 | 395 | 290 |
| Comparative example 1 | 2 | 120 | 160 |
| Comparative example 2 | 4 | 125 | 180 |
| Comparative example 3 | 3 | 130 | 190 |
The test results in table 1 show that the product obtained by the invention not only has stronger adhesion to metal workpieces, but also has excellent corrosion resistance, and can effectively prolong the service life of metal products.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The modified anticorrosive paint is characterized by comprising a component A and a component B;
the component A comprises the following raw materials in parts by weight: 80-100 parts of water-based acrylic modified epoxy resin, 60-80 parts of water, 8-10 parts of urea, 3-8 parts of thickening agent and 0.1-0.3 part of soluble calcium salt;
the component B comprises the following raw materials in parts by weight: 10-15 parts of epoxy resin curing agent, 1-3 parts of urease and 30-50 parts of water;
when the modified anticorrosive paint is used, the components A and B are mixed according to the mass ratio of 3: 1-5: 1, mixing and reusing.
2. The modified anticorrosive paint of claim 1, wherein the thickener is at least one of CMC, polyvinylpyrrolidone, acacia, sodium polyacrylate and sepiolite.
3. The modified anticorrosive paint of claim 3, wherein the thickener is sepiolite; the sepiolite is isocyanate modified sepiolite.
4. The modified anticorrosive paint of claim 1, wherein the soluble calcium salt is at least one of calcium nitrate and calcium chloride.
5. The modified anticorrosive paint of claim 1, wherein the epoxy resin curing agent is an acidic curing agent; the acidic curing agent is at least one of tannic acid and phytic acid.
6. The preparation method of the modified anticorrosive paint is characterized by comprising the following specific preparation steps:
preparation of waterborne acrylic modified epoxy resin:
according to the weight parts, 5-10 parts of acrylic acid, 3-5 parts of methyl methacrylate, 4-8 parts of butyl acrylate, 40-50 parts of propylene glycol methyl ether, 1-3 parts of benzoyl peroxide and 40-60 parts of epoxy resin E-42 are taken in sequence;
firstly, mixing and dissolving epoxy resin E-42 and propylene glycol methyl ether, then adding benzoyl peroxide, acrylic acid, methyl methacrylate and butyl acrylate, heating, stirring, reacting, and cooling to obtain water-based acrylic acid modified epoxy resin;
preparation of a coating component A:
according to the parts by weight, 80-100 parts of water-based acrylic acid modified epoxy resin, 60-80 parts of water, 8-10 parts of urea, 3-8 parts of thickening agent and 0.1-0.3 part of soluble calcium salt are taken in sequence; firstly, uniformly stirring and mixing a thickening agent and water, then adding the aqueous acrylic acid modified epoxy resin, soluble calcium salt and urea, and continuously stirring and uniformly mixing to obtain a component A;
preparation of a coating component B:
according to the parts by weight, sequentially taking 10-15 parts of epoxy resin curing agent, 1-3 parts of urease and 30-50 parts of water; stirring and mixing uniformly to obtain a component B;
the component A and the component B are mixed according to the mass ratio of 3: 1-5: 1, packaging separately to obtain the product.
7. The method for preparing the modified anticorrosive paint of claim 6, wherein the thickener is at least one of CMC, polyvinylpyrrolidone, acacia, sodium polyacrylate and sepiolite.
8. The preparation method of the modified anticorrosive paint according to any one of claims 6 or 7, characterized in that the specific preparation steps further comprise:
modification of sepiolite:
mixing sepiolite and hydrochloric acid according to a mass ratio of 1: 5-1: 10, after mixed hydrothermal reaction, filtering, washing and drying to obtain pretreated sepiolite;
the pretreated sepiolite and isocyanate are mixed according to the mass ratio of 5: 1-10: 1, adding the mixture into a ball milling tank, carrying out ball milling mixing for 36-48h, discharging and drying to obtain the isocyanate modified sepiolite.
9. The method for preparing the modified anticorrosive paint of claim 6, wherein the soluble calcium salt is at least one of calcium nitrate and calcium chloride.
10. The modified anticorrosive paint of claim 1, wherein the epoxy resin curing agent is an acidic curing agent; the acidic curing agent is at least one of tannic acid and phytic acid.
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