CN115710444A - Water-based acrylic acid antirust paint and preparation method thereof - Google Patents
Water-based acrylic acid antirust paint and preparation method thereof Download PDFInfo
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- CN115710444A CN115710444A CN202211501811.0A CN202211501811A CN115710444A CN 115710444 A CN115710444 A CN 115710444A CN 202211501811 A CN202211501811 A CN 202211501811A CN 115710444 A CN115710444 A CN 115710444A
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Abstract
The application relates to a water-based acrylic acid antirust coating and a preparation method thereof, wherein the water-based acrylic acid antirust coating comprises the following raw materials in parts by weight: 45-55 parts of acrylic emulsion, 1-3 parts of film-forming additive, 0.2-0.4 part of defoaming agent, 0.5-0.7 part of montmorillonite, 0.4-0.6 part of thickening agent, 0.4-0.6 part of anti-flash rust agent, 0.1-0.3 part of bactericide, 0.7-0.9 part of dispersant, 4-6 parts of barium sulfate, 8-12 parts of mica powder, 10-15 parts of iron oxide red, 5-8 parts of aluminum tripolyphosphate, 0.1-0.2 part of dimethylethanolamine and 10-15 parts of water. The water-based acrylic acid antirust coating has a relatively excellent antirust effect.
Description
Technical Field
The application relates to the field of coatings, in particular to a water-based acrylic acid antirust coating and a preparation method thereof.
Background
Compared with solvent-based coatings, water-based coatings are receiving more and more attention due to their high environmental protection and high operational safety, and are gaining higher and higher development duty in the fields of automobile repair coatings, anticorrosive coatings, road marking coatings, and the like.
The coating made of the water-based acrylic acid has better heat resistance and light resistance, has good storage stability, and is less in the condition of deterioration in the storage process. In implementation and application, the water-based acrylic coating has the characteristics of good service performance, no pollution and the like, and can be prepared into a coating with excellent construction performance, so that the use safety is effectively ensured.
Based on the current research on the water-based acrylic paint, the application further provides the corrosion-resistant water-based acrylic paint.
Disclosure of Invention
In order to improve the anti-rust performance of the acrylic acid coating, the application provides a water-based acrylic acid anti-rust coating and a preparation method thereof.
In a first aspect, the present application provides a water-based acrylic antirust coating, which adopts the following technical scheme:
the water-based acrylic acid antirust coating comprises the following raw materials in parts by weight: 45-55 parts of acrylic emulsion, 1-3 parts of film-forming additive, 0.2-0.4 part of defoaming agent, 0.5-0.7 part of montmorillonite, 0.4-0.6 part of thickening agent, 0.4-0.6 part of anti-flash rust agent, 0.1-0.3 part of bactericide, 0.7-0.9 part of dispersant, 4-6 parts of barium sulfate, 8-12 parts of mica powder, 10-15 parts of iron oxide red, 5-8 parts of aluminum tripolyphosphate, 0.1-0.2 part of dimethylethanolamine and 10-15 parts of water.
By adopting the technical scheme, the aluminum tripolyphosphate is added into the coating, and the tripolyphosphate ions released by the aluminum tripolyphosphate have stronger chelating force with metal ions, so that a stable complexing passivation film can be formed on the surface of a coated metal substrate, an isolation layer is formed on the surface of the metal, and an anti-rust function is achieved.
The iron oxide red has higher covering power, and the fine particle structure of the iron oxide red can improve the compactness of a coating film in the process of forming the coating film, play a role in shielding and reducing the permeability of the coating film and further achieve the antirust effect; the mica powder is in a sheet structure and is arranged in parallel in the coating, so that the mechanical property and the anti-stretching property of the coating are improved, the compactness of the coating can be improved, the shielding effect is achieved, and the anti-rust effect of the coating is further improved.
Montmorillonite can form flocculent substance in the coating system to achieve thickening effect, and meanwhile, the water resistance of the coating can also be enhanced; barium sulfate can improve the wear resistance, water resistance and impact resistance of the coating film to a certain extent, and meanwhile, the barium sulfate has reflectivity which can enhance the light aging resistance effect of the coating film.
In a specific embodiment, the mica powder is pretreated, specifically as follows: uniformly mixing the water-soluble phenolic resin and water according to the mass ratio of 1: 5-6 of the water-soluble phenolic resin to the water to prepare a mixed solution, adding mica powder into the mixed solution according to the mass ratio of 1: 3-4 of the mica powder to the mixed solution, and filtering and drying to obtain the mica powder with the surface coated with the phenolic resin film.
By adopting the technical scheme, the phenolic resin is used for wrapping the mica powder, and the phenolic resin has cohesiveness, so that the bonding effect of the mica powder with other components in a coating system can be improved, the mica powder can form a stable compact layer on the surface of the substrate, and the anti-corrosion effect of the coating is effectively ensured.
In a specific embodiment, the silica sol is further included in an amount of 5 to 8 parts by weight.
By adopting the technical scheme, after the silica sol is added into the coating system, when the coating is cured, water molecules in the silica sol are evaporated, and colloidal particles can be firmly attached to the surface of the base material, so that the adhesive force of the coating can be improved.
In a specific embodiment, the silane coupling agent is mixed with water to prepare a silane coupling agent solution with the concentration of 3-5%, and then the silane coupling agent solution is sprayed on the surface of the pretreated mica powder according to the mass ratio of the pretreated mica powder to the silane coupling agent of 1 to (2-3).
By adopting the technical scheme, the silane coupling agent and the phenolic resin film are coated on the surface of the mica powder, and in a coating system, the silane coupling agent can simultaneously perform coupling reaction with the silica sol and the phenolic resin, so that in the process of forming a coating, aluminum tripolyphosphate firstly forms a complex passivation film on the surface of the metal substrate, then the mica powder forms a compact layer on one side of the passivation film, due to the existence of the silane coupling agent, the silica sol can form a firm layer between the compact layer formed by the mica powder and the passivation film, and the silica sol on the other side of the compact layer formed by the mica powder can also form a firm layer, so that a multilayer protective structure is formed on the surface of the metal substrate, and the antirust effect of the coating on the metal substrate is effectively ensured.
In a specific possible embodiment, the mica powder has a mesh number of 800 to 1250 mesh.
By adopting the technical scheme, the mica powder can be uniformly dispersed in the coating system.
In a second aspect, the application provides a preparation method of a water-based acrylic acid antirust paint, which adopts the following technical scheme: a preparation method of a water-based acrylic acid antirust coating comprises the following steps:
step S1, uniformly mixing water, a dispersing agent, montmorillonite, dimethylethanolamine and two thirds of defoaming agent according to a ratio;
s2, adding iron oxide red, aluminum tripolyphosphate, barium sulfate and mica powder, and mixing uniformly;
and S3, adding the acrylic emulsion, the film-forming assistant, the residual defoaming agent, the anti-flash rust agent, the bactericide and the thickening agent, and uniformly mixing to obtain the water-based acrylic antirust paint.
In a specific embodiment, in step S2, the materials are mixed and ground to a fineness of less than 30 μm.
By adopting the technical scheme, the coating is favorable for forming a uniform and flat coating film on the surface of the base material.
In a specific embodiment, in step S1, the stirring speed is 600-800rpm, and the stirring time is 20-30min; in step S2 and step S3, the stirring speed is 300-500rpm, and the stirring time is 20-30min.
By adopting the technical scheme, the raw material components can be uniformly dispersed in the coating system.
In summary, the present application includes at least one of the following beneficial technical effects:
1. according to the method, aluminum tripolyphosphate is used for forming a basic protective film on the surface of a metal substrate, mica powder is used for forming a compact protective layer outside the basic protective film, and iron oxide red is used for improving the compactness of a coating film, so that the anti-corrosion performance of the coating film is effectively improved;
2. the coating method has the advantages that the phenolic resin is used for coating the mica powder, so that the cohesiveness between the mica powder and other components can be improved, the stability of a compact layer formed by the mica powder in a coating film can be improved, and the coating method is favorable for improving the anti-corrosion effect of coating;
3. according to the coating, the silica sol is added into a coating system, and the silane coupling agent is sprayed on the mica powder wrapped with the phenolic resin film, so that a complex passivation film formed by aluminum tripolyphosphate, a protective layer formed by the silica sol, a compact layer formed by the mica powder and a protective layer formed by the silica sol are arranged on the surface of a metal substrate in a coating film, the multiple protection effect can be achieved, and the anti-corrosion performance of the coating is greatly improved.
Detailed Description
The present application will be described in further detail with reference to examples.
In the application, the acrylic emulsion is Wanhua Wanthipro 0613; the type of the film-forming additive is SH-2651425; the model of the defoaming agent is TEGO-830; the thickener is RM-2020NPR; the type of the anti-flash rust agent is SN-9779; the type of the bactericide is Kathon lx150; the water-soluble phenolic resin is chemical 2402 of the Jinan mountain sea; the type of the silane coupling agent is KH-560; the silica sol model is zc-823-06.
Preparation example of mica powder
Preparation example 1
Uniformly mixing the water-soluble phenolic resin and water according to the mass ratio of the water-soluble phenolic resin to the water of 1: 5 to prepare a mixed solution, adding the mica powder into the mixed solution according to the mass ratio of the mica powder to the mixed solution of 1: 3, and then filtering and drying to obtain the mica powder with the surface coated with the phenolic resin film.
Preparation example 2
Uniformly mixing the water-soluble phenolic resin and water according to the mass ratio of the water-soluble phenolic resin to the water of 1: 6 to prepare a mixed solution, adding the mica powder into the mixed solution according to the mass ratio of the mica powder to the mixed solution of 1: 4, and then filtering and drying to obtain the mica powder with the surface coated with the phenolic resin film.
Preparation example 3
Mixing a silane coupling agent with water to prepare a silane coupling agent solution with the mass concentration of 3%, and spraying the silane coupling agent solution on the surface of the mica powder in the preparation example 1 according to the mass ratio of the mica powder to the silane coupling agent in the preparation example 1 of 1: 2.
Preparation example 4
Mixing a silane coupling agent with water to prepare a silane coupling agent solution with the mass concentration of 3%, and spraying the silane coupling agent solution on the surface of the mica powder in the preparation example 1 according to the mass ratio of the mica powder to the silane coupling agent in the preparation example 2 of 1: 2.
Preparation example 5
Mixing a silane coupling agent with water to prepare a silane coupling agent solution with the mass concentration of 5%, and spraying the silane coupling agent solution on the surface of the mica powder in the preparation example 1 according to the mass ratio of the mica powder to the silane coupling agent in the preparation example 1 of 1: 3.
Preparation example 6
And mixing the silane coupling agent with water to prepare a silane coupling agent solution with the mass concentration of 5%, and spraying the silane coupling agent solution on the surface of the mica powder in the preparation example 2 according to the mass ratio of the mica powder to the silane coupling agent of 1: 3 in the preparation example 2.
Examples
Example 1
The water-based acrylic acid antirust coating comprises the following raw materials in parts by weight: 450g of acrylic emulsion, 10g of film-forming additive, 2g of defoaming agent, 5g of montmorillonite, 4g of thickening agent, 4g of anti-flash rust agent, 2g of bactericide, 7g of dispersing agent, 40g of barium sulfate, 80g of mica powder, 100g of iron oxide red, 50g of aluminum tripolyphosphate, 1g of dimethylethanolamine and 100g of water. In the embodiment, the dispersant is BYK-190 dispersant, and the mesh number of the mica powder is 800 meshes.
The aqueous acrylic emulsion is prepared by the following method:
s1, mixing a dispersing agent, montmorillonite, dimethylethanolamine and two thirds of a defoaming agent according to a ratio, and continuously stirring for 20min at a stirring speed of 600 rpm;
s2, adding iron oxide red, aluminum tripolyphosphate, barium sulfate and mica powder into the mixture obtained in the step S1, continuously stirring for 20min at the stirring speed of 300rpm, and detecting the fineness of the materials to be 40 micrometers after uniformly mixing;
and S3, adding the acrylic emulsion, the film-forming assistant, the residual defoaming agent, the anti-flash rust agent, the bactericide and the thickener into the mixture obtained in the step S2, and continuously stirring for 20min at the stirring speed of 300rpm to obtain the water-based acrylic antirust paint.
Example 2
The water-based acrylic acid antirust coating comprises the following raw materials in parts by weight: 500g of acrylic emulsion, 20g of film-forming additive, 3g of defoaming agent, 6g of montmorillonite, 5g of thickening agent, 5g of anti-flash rust agent, 1g of bactericide, 8g of dispersing agent, 50g of barium sulfate, 100g of mica powder, 130g of iron oxide red, 70g of aluminum tripolyphosphate, 1g of dimethylethanolamine and 130g of water. In this example, BYK-190 dispersant was used as the dispersant.
The aqueous acrylic emulsion is prepared by the following method:
step S1, mixing a dispersing agent, montmorillonite, dimethylethanolamine and two thirds of defoaming agent according to a ratio, and continuously stirring for 30min at a stirring speed of 800 rpm;
s2, adding iron oxide red, aluminum tripolyphosphate, barium sulfate and mica powder into the mixture obtained in the step S1, and continuously stirring for 30min at the stirring speed of 500 rpm;
and S3, adding the acrylic emulsion, the film-forming assistant, the residual defoaming agent, the anti-flash rust agent, the bactericide and the thickener into the mixture obtained in the step S2, and continuously stirring for 30min at a stirring speed of 500rpm to obtain the water-based acrylic antirust paint.
Example 3
The difference between the embodiment and the embodiment 1 is only that the dosage of each raw material component is not used, and the specific dosage is as follows: 550g of acrylic emulsion, 30g of film-forming additive, 4g of defoaming agent, 7g of montmorillonite, 6g of thickening agent, 6g of anti-flash rust agent, 3g of bactericide, 9g of dispersing agent, 60g of barium sulfate, 120g of mica powder, 150g of iron oxide red, 80g of aluminum tripolyphosphate, 2g of dimethylethanolamine and 150g of water. In this example, BYK-190 dispersant was used as the dispersant.
Example 4
This example differs from example 2 only in that the dispersant is selected to be a TEGO 740W wetting dispersant.
Example 5
This example differs from example 2 only in that the dispersant consists of TEGO 740W wetting dispersant and BYK-190 dispersant in a 5: 3 mass ratio.
Example 6
The present example only differs from example 1 in that the mesh number of the mica powder is 1250 mesh.
Example 7
The present example differs from example 1 only in that the mica powder prepared in preparation example 1 was used.
Example 8
The present example differs from example 1 only in that the mica powder prepared in preparation example 2 was used.
Example 9
This example differs from example 7 only in that 50g of silica sol was also added in step S2.
Example 10
This example differs from example 7 only in that 60g of silica sol was further added in step S2.
Example 11
The present example differs from example 7 only in that 80g of silica sol was further added in step S2.
Example 12
The present example differs from example 9 only in that the mica powder prepared in preparation example 3 was used.
Example 13
The present example only differs from example 9 in that the mica powder prepared in preparation example 4 was used.
Example 14
The present example only differs from example 9 in that the mica powder prepared in preparation example 5 was used.
Example 15
The present example differs from example 9 only in that the mica powder prepared in preparation example 6 was used.
Example 16
The present example differs from example 1 only in that, in step S2, the blended material is ground to a fineness of 30 μm.
Example 17
The present example differs from example 1 only in that, in step S2, the blended material is ground to a fineness of 25 μm.
Comparative example
Comparative example 1
In this comparative example, the iron oxide red was replaced with an equal amount of water as compared to example 1.
Comparative example 2
This comparative example compared to example 1, where the aluminum tripolyphosphate was replaced with an equal amount of water.
Comparative example 3
In comparison with example 1, the mica powder was replaced with an equal amount of water in this comparative example.
Performance test
Test one, referred to GB 1720-1979 "paint adhesion test", measures the adhesion of the paint films in the examples and the comparative examples. The results were rated on a 1-7 scale, with 1 being the best adhesion and 7 being the worst adhesion.
Test II, the impact resistance of the paint films in the examples and comparative examples was determined with reference to GB/T1732-1993 "determination of impact resistance of the paint film", and the minimum height at which the falling weight causes the paint film to crack or peel was recorded.
Test three, the water resistance of the paint films in the examples and comparative examples was determined with reference to GB/T1733-1993 paint film Water resistance assay (24 h), and the results were evaluated: stage 1: no bubble and no drop; and 2, stage: few bubbles exist, the bubbles fall off, and the falling off size is less than 1mm; and 3, stage: a small amount of bubbles and falling off exist, and the falling off size is between 1 and 3 mm; 4, level: more bubbles exist, the bubbles fall off, and the falling size is between 3 and 10 mm; and 5, stage: a plurality of bubbles are present, and fall off, and the fall-off size is between 10 and 30 mm; stage 6: has more dense bubbles and falling off with the falling off size of more than 30mm.
And fourthly, testing by referring to GB/T1771-2007 determination of neutral salt spray resistance of colored paint and varnish, and evaluating the result: stage 1: no bubble and no rust point; and 2, stage: few bubbles are present, rust spots are present, and the number of the rust spots is less than 5; and 3, level: a small amount of bubbles and a small amount of rusty spots are present, and the number of the rusty spots is between 6 and 10; 4, level: there are medium number of bubbles, medium number of rust spots, the number of rust spots is between 11-15; and 5, stage: the number of the bubbles and the rusty spots is more, and the number of the rusty spots is between 16 and 20; and 6, level: there are dense bubbles and rust spots, the number of which is more than 20.
TABLE 1 Performance test results
Referring to table 1, the coatings of examples 1 to 3 showed better adhesion and corrosion prevention performance compared with those of comparative examples 1 to 3, which shows that the coating can form a dense isolation protection layer on the surface of a metal substrate by adding aluminum tripolyphosphate, iron oxide red and mica powder, so that the coating film shows excellent corrosion prevention performance.
By combining the TEGO 740W wetting dispersant and the BYK-190 dispersant in the combination of the embodiment 2, the embodiment 4 and the embodiment 5, the dispersion uniformity of raw material components in a coating system is further facilitated, and the coating is facilitated to form a compact coating film on the surface of a metal substrate, so that an anti-rust effect is achieved.
By combining the embodiment 1, the embodiment 7 and the embodiment 8, the coating in the embodiment 7 and the embodiment 8 shows better adhesion, impact resistance and corrosion resistance, which shows that the coating of the mica powder with the water-soluble phenolic resin can improve the adhesion between the mica powder and other raw materials and make the coating better exert the corrosion resistance effect.
The coatings in the examples 9 to 11 show better adhesion by combining the examples 7, 9 to 11, which shows that the silica sol added into the coating system can effectively improve the adhesion of the coating film to the metal substrate.
With reference to examples 9, 12 to 15, the coatings in examples 12 to 15 showed better adhesion, which indicates that the silane coupling agent is sprayed on the mica powder coated with the water-soluble phenolic resin, and in the process of curing the coating, the silane coupling agent can enable colloidal particles in the silica sol to form a firm layer on both sides of the dense layer formed by the mica powder layer, so that an isolation layer formed by aluminum tripolyphosphate, a firm layer formed by the silica sol, a dense layer formed by the mica powder and a firm layer formed by the silica sol can be sequentially formed on the surface of the metal substrate, and further, the anti-corrosion performance and the adhesion to the metal substrate of the coating are greatly improved.
The paint in example 16 and example 17 shows better adhesion when being combined with example 1, example 16 and example 17, and shows that the paint is beneficial to forming a uniform and flat coating film on the surface of the metal substrate after the fineness of the paint is properly adjusted, and the adhesion effect of the paint on the surface of the metal substrate can be improved to a certain extent.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The water-based acrylic acid antirust coating is characterized in that: the feed comprises the following raw materials in parts by weight: 45-55 parts of acrylic emulsion, 1-3 parts of film-forming additive, 0.2-0.4 part of defoaming agent, 0.5-0.7 part of montmorillonite, 0.4-0.6 part of thickening agent, 0.4-0.6 part of anti-flash rust agent, 0.1-0.3 part of bactericide, 0.7-0.9 part of dispersant, 4-6 parts of barium sulfate, 8-12 parts of mica powder, 10-15 parts of iron oxide red, 5-8 parts of aluminum tripolyphosphate, 0.1-0.2 part of dimethylethanolamine and 10-15 parts of water.
2. The aqueous acrylic anticorrosive paint according to claim 1, characterized in that: the mica powder is pretreated, and the specific treatment is as follows: uniformly mixing the water-soluble phenolic resin and water according to the mass ratio of 1: 5-6 of the water-soluble phenolic resin to the water to prepare a mixed solution, adding mica powder into the mixed solution according to the mass ratio of 1: 3-4 of the mica powder to the mixed solution, and filtering and drying to obtain the mica powder with the surface coated with the phenolic resin film.
3. The aqueous acrylic anticorrosive paint according to claim 2, characterized in that: also comprises 5-8 parts by weight of silica sol.
4. The aqueous acrylic anticorrosive paint according to claim 3, characterized in that: mixing a silane coupling agent with water to prepare a silane coupling agent solution with the concentration of 3-5%, and spraying the silane coupling agent solution on the surface of the pretreated mica powder according to the mass ratio of the pretreated mica powder to the silane coupling agent of 1: 2-3.
5. The aqueous acrylic anticorrosive paint according to claim 1, characterized in that: the mica powder has the mesh number of 800-1250 meshes.
6. The method for preparing the water-based acrylic antirust coating of any one of claims 1 to 5, characterized by comprising the following steps:
step S1, uniformly mixing water, a dispersing agent, montmorillonite, dimethylethanolamine and two thirds of defoaming agent according to a ratio;
s2, adding iron oxide red, aluminum tripolyphosphate, barium sulfate and mica powder, and mixing uniformly;
and S3, adding the acrylic emulsion, the film-forming auxiliary agent, the residual defoaming agent, the flash rust inhibitor, the bactericide and the thickening agent, and uniformly mixing to obtain the water-based acrylic antirust paint.
7. The preparation method of the water-based acrylic antirust coating material according to claim 6, wherein in the step S2, the materials are uniformly mixed and then ground to a fineness of less than 30 μm.
8. The preparation method of the water-based acrylic acid antirust coating material according to claim 6, characterized in that in step S1, the stirring speed is 600-800rpm, and the stirring is performed for 20-30min; in step S2 and step S3, the stirring speed is 300-500rpm, and the stirring time is 20-30min.
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| CN117229708A (en) * | 2023-09-20 | 2023-12-15 | 苏州佩琦材料科技有限公司 | EB-cured solvent-free wet heat resistant insulating coating and construction process thereof |
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| CN117229708A (en) * | 2023-09-20 | 2023-12-15 | 苏州佩琦材料科技有限公司 | EB-cured solvent-free wet heat resistant insulating coating and construction process thereof |
| CN117229708B (en) * | 2023-09-20 | 2024-04-02 | 苏州佩琦材料科技有限公司 | EB-cured solvent-free wet heat resistant insulating coating and construction process thereof |
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