CN112625532B - Efficient anticorrosive water-based acrylic coating and preparation method thereof - Google Patents
Efficient anticorrosive water-based acrylic coating and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a high-efficiency anticorrosive water-based acrylic coating and a preparation method thereof, wherein the coating is prepared from the following raw materials in parts by weight: 50-60 parts of methyl methacrylate, 12-15 parts of styrene, 3-5 parts of styrene microsphere solution, 55-70 parts of n-butyl acrylate, 5-7 parts of gamma-methacryloxypropyltrimethoxysilane, 4-6 parts of sodium dodecyl sulfate, 10-12 parts of alkylphenol polyoxyethylene, 0.05-0.1 part of ammonium persulfate, 0.04-0.08 part of sodium bicarbonate, 32-34 parts of coarse whiting powder, 8-10 parts of dodecanol ester, 0.3-0.6 part of polyamine curing agent, a proper amount of ammonia water and a proper amount of deionized water. The efficient anti-corrosion water-based acrylic coating disclosed by the invention is mild in reaction conditions and simple in preparation conditions, can effectively improve the water resistance, mechanical property, barrier property and the like of the water-based acrylic coating, further greatly enhances the anti-corrosion property of the water-based acrylic coating, effectively expands the use field of water-based acrylic materials, and has an ideal market prospect.
Description
Technical Field
The invention belongs to the technical field of water-based paint, and particularly relates to efficient anticorrosive water-based acrylic paint and a preparation method thereof.
Background
The paint is used as a common important chemical product, is generally applied to almost all trades such as buildings, aviation, ships, automobiles and the like, and plays the functional roles of appearance decoration, weather resistance, corrosion resistance and the like. With the development of engineering technology, special working environments become more common, and coatings used in harsh environments have become important research contents. The development of resin as a base part of organic coating composition as a protective material having high temperature resistance, multiple purposes and excellent performance has been the focus of research in recent years.
With the increasing awareness of environmental protection and the health of environmental regulations, the use of Volatile Organic Compounds (VOC) and Hazardous Air Pollutants (HAP) in traditional solvent-based coatings is increasingly limited, and high solids coatings are receiving more and more attention. The water-based acrylic resin coating is widely applied to the water-based coating, has the characteristics of light color, high transparency, good corrosion resistance, small absorption in an infrared region, numerous monomers, low price, good glossiness, high fullness and the like, is low in VOC content, does not contain organic volatile matters in the using process, does not pollute the environment, has defects in water resistance, mechanical property and barrier property of nitrogen, influences the anticorrosion function of the nitrogen, and is limited in application in partial fields, so that the water-based acrylic resin coating is required to be improved to improve the overall performance of the nitrogen-based acrylic resin coating and expand the application range of the water-based acrylic coating.
Disclosure of Invention
The invention aims to make up the defects of the prior art and provides a high-efficiency anticorrosive water-based acrylic paint and a preparation method thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
an efficient anticorrosive water-based acrylic coating is prepared from the following raw materials in parts by weight: 50-60 parts of methyl methacrylate, 12-15 parts of styrene, 3-5 parts of styrene microsphere solution, 55-70 parts of n-butyl acrylate, 5-7 parts of gamma-methacryloxypropyltrimethoxysilane, 4-6 parts of sodium dodecyl sulfate, 10-12 parts of alkylphenol polyoxyethylene, 0.05-0.1 part of ammonium persulfate, 0.04-0.08 part of sodium bicarbonate, 32-34 parts of coarse whiting powder, 8-10 parts of dodecanol ester, 0.3-0.6 part of polyamine curing agent, a proper amount of ammonia water and a proper amount of deionized water.
Preferably, the efficient anticorrosive water-based acrylic coating is prepared from the following raw materials in parts by weight: 55 parts of methyl methacrylate, 13.5 parts of styrene, 4 parts of styrene microsphere solution, 63 parts of n-butyl acrylate, 6 parts of gamma-methacryloxypropyltrimethoxysilane, 5 parts of sodium dodecyl sulfate, 11 parts of alkylphenol polyoxyethylene, 0.07 part of ammonium persulfate, 0.06 part of sodium bicarbonate, 33 parts of coarse whiting powder, 9 parts of dodecanol ester, 0.4 part of polyamine curing agent, a proper amount of ammonia water and a proper amount of deionized water.
Further, the preparation method of the styrene microsphere solution comprises the following steps: taking potassium persulfate and monomer styrene according to a mass ratio of 1: 80, adding the mixture into deionized water with the mass of 30-50 times, stirring and dissolving, then adding 0.05% of sodium bicarbonate, stirring uniformly under the protection of nitrogen, heating until the reaction is finished, and dialyzing the obtained product in distilled water for 3-4 days to obtain the styrene microsphere solution.
Furthermore, the temperature of the heating reaction is controlled to be 75-85 ℃, the stirring is continuously carried out at 200-300 r/min during the reaction process, and the reaction is completed within 4-6 hours.
The preparation method of the efficient anticorrosive water-based acrylic coating specifically comprises the following steps:
(1) mixing methyl methacrylate, styrene, n-butyl acrylate and gamma-methacryloxypropyltrimethoxysilane as reaction monomers, mixing sodium dodecyl sulfate and alkylphenol ethoxylates as an emulsifier, mixing the two, adding deionized water, stirring and dissolving uniformly to obtain a pre-emulsion for later use;
(2) dissolving ammonium persulfate in deionized water of which the mass is 240-260 times that of the ammonium persulfate, and uniformly stirring to form an ammonium persulfate solution for later use;
(3) dissolving sodium bicarbonate in deionized water with the mass of 350 times that of 300-fold, adding 1/3 pre-emulsion, heating to 65-75 ℃, then adding 1/2 ammonium persulfate solution, and uniformly stirring to obtain seed emulsion for later use;
(4) adding a styrene microsphere solution, a dodecyl alcohol ester and a polyamine curing agent into the seed emulsion, stirring uniformly, then adding the rest pre-emulsion and an ammonium persulfate solution in batches, adding ammonia water to adjust the pH value to 7.5-8.0 when the emulsion presents milky bluish light, finally adding heavy calcium powder, stirring for 25-35 minutes, adding water and adjusting to proper viscosity, thus obtaining the coating.
Further, the adding amount of the deionized water in the step (1) is controlled to be that the oil-water ratio is 1: (0.65-0.75).
Further, the residual pre-emulsion and ammonium persulfate solution in the step (4) are added in two times, half of the residual pre-emulsion and ammonium persulfate solution are added in each time, the feeding interval is 30 minutes in each time, and the temperature is kept at 65-75 ℃ in the whole process.
Further, after the heavy calcium powder is added in the step (4), the stirring speed is controlled to be 600 revolutions per minute and 1000 revolutions per minute during stirring.
The invention has the advantages that:
according to the invention, a silane coupling agent is introduced to carry out modification treatment on the basis of conventional water-based acrylic acid, wherein gamma-methacryloxypropyltrimethoxysilane provides a hydrophobic group through cohesive energy, hydrolytic crosslinking with acrylic acid in film formation enhances the compactness of a coating film, and forms a hydrophobic layer on the surface, so that moisture cannot permeate into the coating, the water resistance of the coating is enhanced, meanwhile, the terminal alkenyl group contained in the silane coupling agent further forms various crosslinking points with the acrylic acid, the weather resistance and the mechanical property of acrylic resin can be enhanced, and the corrosion resistance of the material is improved from the side.
The invention adds the styrene microsphere solution into the acrylic resin, wherein a large amount of styrene organic microspheres are contained as the filler, the surface of the styrene organic microspheres has a large amount of negative charges, and the styrene organic microspheres can form additional interaction points with polyamine curing agent with positive charges and the acrylic modified resin under the action of electrostatic adsorption, so that the filler and the acrylic base material are combined more tightly, the compactness and the barrier property of the coating are improved, and the diffusion path of a corrosive medium in the coating is effectively reduced. Meanwhile, a coating formed after the coating is used can generate partial microscopic pores due to the volatilization of a solvent in the curing process, and the styrene organic microsphere filler can be automatically filled into the pores, so that the coating absorbs stress when stressed and weakens the microscopic cracks generated when the coating receives stronger acting force, and the mechanical property of the coating is improved.
The efficient anti-corrosion water-based acrylic coating disclosed by the invention is mild in reaction conditions and simple in preparation conditions, can effectively improve the water resistance, mechanical property, barrier property and the like of the water-based acrylic coating, further greatly enhances the anti-corrosion property of the water-based acrylic coating, effectively expands the use field of water-based acrylic materials, and has an ideal market prospect.
Detailed Description
The technical scheme of the invention is further explained by combining the specific examples as follows:
example 1
The efficient anticorrosive water-based acrylic coating is prepared from the following raw materials in parts by mass: 55 parts of methyl methacrylate, 13.5 parts of styrene, 4 parts of styrene microsphere solution, 63 parts of n-butyl acrylate, 6 parts of gamma-methacryloxypropyl trimethoxy silane, 5 parts of lauryl sodium sulfate, 11 parts of alkylphenol polyoxyethylene, 0.07 part of ammonium persulfate, 0.06 part of sodium bicarbonate, 33 parts of heavy calcium powder, 9 parts of lauryl alcohol ester, 0.4 part of polyamine curing agent, a proper amount of ammonia water and a proper amount of deionized water.
The preparation method of the styrene microsphere solution comprises the following steps: taking potassium persulfate and monomer styrene according to a mass ratio of 1: 80, adding the mixture into deionized water of which the mass is 40 times that of the mixture, stirring and dissolving the mixture, then adding 0.05 percent of sodium bicarbonate into the mixture, stirring the mixture evenly under the protection of nitrogen, heating the mixture to 80 ℃, continuously stirring the mixture at 250 revolutions per minute for 5 hours to complete reaction, and dialyzing the obtained product in distilled water for 3 days to obtain the styrene microsphere solution.
The preparation method of the high-efficiency anticorrosion water-based acrylic paint comprises the following steps:
(1) mixing methyl methacrylate, styrene, n-butyl acrylate and gamma-methacryloxypropyl trimethoxy silane as a reaction monomer, mixing sodium dodecyl sulfate and alkylphenol polyoxyethylene as an emulsifier, adding deionized water after mixing the two, stirring and dissolving uniformly, and controlling the oil-water ratio to reach 1: 0.7, obtaining pre-emulsion for later use;
(2) dissolving ammonium persulfate in deionized water with the mass of 250 times, and uniformly stirring to form an ammonium persulfate solution for later use;
(3) dissolving sodium bicarbonate in deionized water with the mass of 325 times, adding 1/3 pre-emulsion, heating to 70 ℃, then adding 1/2 ammonium persulfate solution, and uniformly stirring to obtain seed emulsion for later use;
(4) adding a styrene microsphere solution, a decaglycol ester and a polyamine curing agent into the seed emulsion, uniformly stirring, then adding the rest pre-emulsion and an ammonium persulfate solution in two times, adding half of the rest pre-emulsion and ammonium persulfate solution each time, simultaneously adding the feeding interval of 30 minutes each time, keeping the temperature at 70 ℃ in the whole process, adding ammonia water to adjust the pH value to 7.8 when the emulsion is milky bluish, finally adding heavy calcium powder, stirring for 30 minutes at 800 revolutions per minute, adding water and adjusting to proper viscosity to obtain the coating.
Example 2
The efficient anticorrosive water-based acrylic coating is prepared from the following raw materials in parts by mass: 50 parts of methyl methacrylate, 12 parts of styrene, 3 parts of styrene microsphere solution, 55 parts of n-butyl acrylate, 5 parts of gamma-methacryloxypropyltrimethoxysilane, 4 parts of sodium dodecyl sulfate, 10 parts of alkylphenol polyoxyethylene, 0.05 part of ammonium persulfate, 0.04 part of sodium bicarbonate, 32 parts of heavy calcium powder, 8 parts of decaglycol ester, 0.3 part of polyamine curing agent, a proper amount of ammonia water and a proper amount of deionized water.
The preparation method of the styrene microsphere solution comprises the following steps: taking potassium persulfate and monomer styrene according to a mass ratio of 1: 80, adding the mixture into deionized water of which the mass is 30 times that of the mixture, stirring and dissolving the mixture, then adding 0.05 percent of sodium bicarbonate into the mixture, stirring the mixture evenly under the protection of nitrogen, heating the mixture to 75 ℃, continuously stirring the mixture at 300 revolutions per minute for 4 hours to complete the reaction, and dialyzing the obtained product in distilled water for 3 days to obtain the styrene microsphere solution.
The preparation method of the high-efficiency anticorrosion water-based acrylic paint comprises the following steps:
(1) mixing methyl methacrylate, styrene, n-butyl acrylate and gamma-methacryloxypropyltrimethoxysilane as a reaction monomer, mixing sodium dodecyl sulfate and alkylphenol ethoxylates as an emulsifier, mixing the two, adding deionized water, stirring and dissolving uniformly, and controlling the oil-water ratio to reach 1: 0.65, obtaining pre-emulsion for later use;
(2) dissolving ammonium persulfate in deionized water of which the mass is 240 times that of the ammonium persulfate, and uniformly stirring to form an ammonium persulfate solution for later use;
(3) dissolving sodium bicarbonate in deionized water 300 times the mass of the sodium bicarbonate, adding 1/3 pre-emulsion, heating to 65 ℃, then adding 1/2 ammonium persulfate solution, and uniformly stirring to obtain seed emulsion for later use;
(4) adding a styrene microsphere solution, a dodecyl alcohol ester and a polyamine curing agent into the seed emulsion, uniformly stirring, adding the rest pre-emulsion and an ammonium persulfate solution twice, adding half of the rest pre-emulsion and an ammonium persulfate solution every time, simultaneously adding every time at an interval of 30 minutes, keeping the temperature at 65 ℃ in the whole process, adding ammonia water to adjust the pH value to 7.5 when the emulsion presents milky bluish color, finally adding heavy calcium powder, stirring for 35 minutes at 600 revolutions per minute, adding water, and adjusting to proper viscosity to obtain the coating.
Example 3
The efficient anticorrosive water-based acrylic coating is prepared from the following raw materials in parts by mass: 60 parts of methyl methacrylate, 15 parts of styrene, 5 parts of styrene microsphere solution, 70 parts of n-butyl acrylate, 7 parts of gamma-methacryloxypropyltrimethoxysilane, 6 parts of lauryl sodium sulfate, 12 parts of alkylphenol polyoxyethylene, 0.1 part of ammonium persulfate, 0.08 part of sodium bicarbonate, 34 parts of coarse whiting powder, 10 parts of lauryl alcohol ester, 0.6 part of polyamine curing agent, a proper amount of ammonia water and a proper amount of deionized water.
The preparation method of the styrene microsphere solution comprises the following steps: taking potassium persulfate and monomer styrene according to a mass ratio of 1: 80, adding the mixture into deionized water with the mass of 50 times, stirring and dissolving, then adding 0.05% of sodium bicarbonate, stirring uniformly under the protection of nitrogen, heating to 85 ℃, continuously stirring at 200 revolutions per minute for 6 hours, completing the reaction, and dialyzing the obtained product in distilled water for 4 days to obtain the styrene microsphere solution.
The preparation method of the high-efficiency anticorrosion water-based acrylic paint comprises the following steps:
(1) mixing methyl methacrylate, styrene, n-butyl acrylate and gamma-methacryloxypropyltrimethoxysilane as a reaction monomer, mixing sodium dodecyl sulfate and alkylphenol ethoxylates as an emulsifier, mixing the two, adding deionized water, stirring and dissolving uniformly, and controlling the oil-water ratio to reach 1: 0.75, obtaining pre-emulsion for later use;
(2) dissolving ammonium persulfate in deionized water 260 times of the mass of the ammonium persulfate, and uniformly stirring to form an ammonium persulfate solution for later use;
(3) dissolving sodium bicarbonate in deionized water 350 times of the mass of the sodium bicarbonate, adding 1/3 pre-emulsion, heating to 75 ℃, then adding 1/2 ammonium persulfate solution, and uniformly stirring to obtain seed emulsion for later use;
(4) adding a styrene microsphere solution, a dodecyl alcohol ester and a polyamine curing agent into the seed emulsion, uniformly stirring, adding the rest pre-emulsion and an ammonium persulfate solution twice, adding half of the rest pre-emulsion and an ammonium persulfate solution every time, simultaneously adding every time at an interval of 30 minutes, keeping the temperature at 75 ℃ in the whole process, adding ammonia water to adjust the pH value to 8.0 when the emulsion is milky bluish, finally adding heavy calcium powder, stirring for 25 minutes at 1000 revolutions per minute, and adding water to adjust to proper viscosity, thus obtaining the coating.
Comparative example 1
Comparative example 1, the modification was carried out without using gamma-methacryloxypropyltrimethoxysilane in the starting material as follows:
the efficient anticorrosive water-based acrylic coating is prepared from the following raw materials in parts by mass: 55 parts of methyl methacrylate, 13.5 parts of styrene, 4 parts of styrene microsphere solution, 63 parts of n-butyl acrylate, 5 parts of sodium dodecyl sulfate, 11 parts of alkylphenol polyoxyethylene, 0.07 part of ammonium persulfate, 0.06 part of sodium bicarbonate, 33 parts of heavy calcium powder, 9 parts of dodecanol ester, 0.4 part of polyamine curing agent, a proper amount of ammonia water and a proper amount of deionized water.
The preparation method of the styrene microsphere solution comprises the following steps: taking potassium persulfate and monomer styrene according to a mass ratio of 1: 80, adding the mixture into deionized water of which the mass is 40 times that of the mixture, stirring and dissolving the mixture, then adding 0.05 percent of sodium bicarbonate into the mixture, stirring the mixture evenly under the protection of nitrogen, heating the mixture to 80 ℃, continuously stirring the mixture at 250 revolutions per minute for 5 hours to complete reaction, and dialyzing the obtained product in distilled water for 3 days to obtain the styrene microsphere solution.
The preparation method of the high-efficiency anticorrosion water-based acrylic paint comprises the following steps:
(1) mixing methyl methacrylate, styrene and n-butyl acrylate to obtain a reaction monomer, mixing sodium dodecyl sulfate and alkylphenol polyoxyethylene to obtain an emulsifier, mixing the two, adding deionized water, stirring and dissolving uniformly, and controlling the oil-water ratio to be 1: 0.7, obtaining pre-emulsion for later use;
(2) dissolving ammonium persulfate in deionized water with the mass of 250 times, and uniformly stirring to form an ammonium persulfate solution for later use;
(3) dissolving sodium bicarbonate in deionized water with the mass of 325 times, adding 1/3 pre-emulsion, heating to 70 ℃, then adding 1/2 ammonium persulfate solution, and uniformly stirring to obtain seed emulsion for later use;
(4) adding a styrene microsphere solution, a dodecyl alcohol ester and a polyamine curing agent into the seed emulsion, uniformly stirring, adding the rest pre-emulsion and an ammonium persulfate solution twice, adding half of the rest pre-emulsion and an ammonium persulfate solution every time, simultaneously adding every time at an interval of 30 minutes, keeping the temperature at 70 ℃ in the whole process, adding ammonia water to adjust the pH value to 7.8 when the emulsion is milky bluish, finally adding coarse whiting powder, stirring for 30 minutes at 800 revolutions per minute, adding water, and adjusting to a proper viscosity to obtain the coating.
The coatings obtained in examples 1 to 3 and comparative example 1 were tested, and each coating was uniformly applied to the surface of a clean test steel sheet so that the thickness of the coating after drying was about 50 μm.
The static contact angle of the coating to water was measured with a JY-82B type contact angle tester, and the average of 5 measurements was taken for each sample.
And then placing the steel sheets coated with different coatings in distilled water for soaking for 48 hours, wherein the water absorption of the composite coating is as follows:
wherein m is 0 And m 1 The mass of the coating before and after water absorption, respectively.
The maximum decomposition temperature of the coating was determined with a TG-DTA thermogravimetric analyzer.
The corrosion resistance is tested by using a YW alpha/Q-150 type salt spray corrosion test box, a coating sample is placed in the salt spray box, the salt spray pressure is adjusted to 0.5-1.5/cm2, 5% sodium chloride solution is used for spraying, and the change of the coating surface is observed after the coating sample is continuously sprayed for 600 hours.
The test results are shown in table 1:
TABLE 1
| Water absorption (%) | Contact angle (°) | Maximum decomposition temperature (. degree. C.) | Corrosion resistance | |
| Example 1 | 12.76 | 91.32 | 437.1 | No obvious rust |
| Example 2 | 13.81 | 92.64 | 431.9 | No obvious rust |
| Example 3 | 13.22 | 91.90 | 433.5 | No obvious rust |
| Comparative example 1 | 18.05 | 76.85 | 386.6 | With a small amount of rust being produced |
As can be seen from the above table, the acrylic coating modified by adding the silane coupling agent has the advantages that the hydrophobicity is obviously improved, the average contact angle is increased by about 15 degrees, and water molecules can be effectively prevented from entering the coating, so that the water absorption of the coating is reduced, the water resistance of the coating is improved, the maximum decomposition temperature of the coating is also improved, and the weather resistance, especially the high temperature resistance, of the coating is improved, and the performances have different degrees of promotion effect on the corrosion resistance of the material.
Comparative example 2
Comparative example 1, no styrene microsphere solution was used in the feed, as follows:
an efficient anticorrosive water-based acrylic coating is prepared from the following raw materials in parts by mass: 55 parts of methyl methacrylate, 13.5 parts of styrene, 63 parts of n-butyl acrylate, 6 parts of gamma-methacryloxypropyl trimethoxy silane, 5 parts of lauryl sodium sulfate, 11 parts of alkylphenol ethoxylates, 0.07 part of ammonium persulfate, 0.06 part of sodium bicarbonate, 33 parts of heavy calcium powder, 9 parts of dodecanol ester, 0.4 part of polyamine curing agent, a proper amount of ammonia water and a proper amount of deionized water.
The preparation method of the high-efficiency anticorrosion water-based acrylic paint comprises the following steps:
(1) mixing methyl methacrylate, styrene, n-butyl acrylate and gamma-methacryloxypropyltrimethoxysilane as a reaction monomer, mixing sodium dodecyl sulfate and alkylphenol ethoxylates as an emulsifier, mixing the two, adding deionized water, stirring and dissolving uniformly, and controlling the oil-water ratio to reach 1: 0.7, obtaining pre-emulsion for later use;
(2) dissolving ammonium persulfate in deionized water with the mass of 250 times, and uniformly stirring to form an ammonium persulfate solution for later use;
(3) dissolving sodium bicarbonate in deionized water with the mass of 325 times, adding 1/3 pre-emulsion, heating to 70 ℃, then adding 1/2 ammonium persulfate solution, and uniformly stirring to obtain seed emulsion for later use;
(4) adding a decaglycol ester and polyamine curing agent into the seed emulsion, uniformly stirring, then adding the rest pre-emulsion and ammonium persulfate solution in two times, adding half of the rest pre-emulsion and ammonium persulfate solution each time, simultaneously keeping the temperature at 70 ℃ in each feeding interval for 30 minutes, adding ammonia water to adjust the pH value to 7.8 when the emulsion is milky bluish, finally adding heavy calcium powder, stirring for 30 minutes at 800 revolutions per minute, and adding water to adjust to proper viscosity to obtain the coating.
The coatings obtained in examples 1 to 3 and comparative example 2 were tested, and each coating was uniformly applied to the surface of a clean test steel sheet to a thickness of about 50 μm after drying.
The YW alpha/Q-150 type salt spray corrosion test box is used for testing corrosion resistance, a coating sample is placed in the salt spray box, and the salt spray pressure is adjusted to be 0.5-1.5/cm 2 The change in the coating surface was observed by spraying with a 5% sodium chloride solution for 600 h.
The adhesion was measured with a PositestAT-A pull-type fully automatic adhesion tester.
The test results are shown in table 2:
TABLE 2
| Corrosion resistance | Adhesion (MPa) | |
| Example 1 | No obvious rust | 9.06 |
| Example 2 | No obvious rust | 8.87 |
| Example 3 | No obvious rust | 8.69 |
| Comparative example 2 | Has a large amount of rust | 7.35 |
As can be seen from Table 2, with the addition of the styrene microsphere solution, the corrosion resistance of the material is significantly enhanced, the anticorrosive effect of the embodiment is obviously superior to that of the comparative example, the use of the styrene organic microsphere filler is proved to be beneficial to improving the barrier property and the anticorrosive property of the acrylic coating, and meanwhile, the adhesion of the embodiment is also improved by the comparative example, so that the styrene organic microsphere filler can be better attached to a base material, and the service life of the coating is prolonged.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The efficient anticorrosive water-based acrylic coating is characterized by being prepared from the following raw materials in parts by weight: 50-60 parts of methyl methacrylate, 12-15 parts of styrene, 3-5 parts of styrene microsphere solution, 55-70 parts of n-butyl acrylate, 5-7 parts of gamma-methacryloxypropyltrimethoxysilane, 4-6 parts of sodium dodecyl sulfate, 10-12 parts of alkylphenol polyoxyethylene, 0.05-0.1 part of ammonium persulfate, 0.04-0.08 part of sodium bicarbonate, 32-34 parts of heavy calcium powder, 8-10 parts of lauryl ester, 0.3-0.6 part of polyamine curing agent, a proper amount of ammonia water and a proper amount of deionized water;
wherein the styrene microsphere solution is prepared from potassium persulfate and monomer styrene;
the preparation method of the styrene microsphere solution comprises the following steps: taking potassium persulfate and monomer styrene according to a mass ratio of 1: 80, adding the mixture into deionized water with the mass of 30-50 times, stirring and dissolving, then adding 0.05% of sodium bicarbonate, stirring uniformly under the protection of nitrogen, heating until the reaction is finished, and dialyzing the obtained product in distilled water for 3-4 days to obtain a styrene microsphere solution; the temperature of the heating reaction is controlled to be 75-85 ℃, the stirring is continuously carried out at 200-300 r/min in the reaction process, and the reaction is completed within 4-6 hours;
the preparation method of the high-efficiency anticorrosive water-based acrylic coating specifically comprises the following steps:
(1) mixing methyl methacrylate, styrene, n-butyl acrylate and gamma-methacryloxypropyltrimethoxysilane as reaction monomers, mixing sodium dodecyl sulfate and alkylphenol ethoxylates as an emulsifier, mixing the two, adding deionized water, stirring and dissolving uniformly to obtain a pre-emulsion for later use;
(2) dissolving ammonium persulfate in deionized water of which the mass is 240-260 times that of the ammonium persulfate, and uniformly stirring to form an ammonium persulfate solution for later use;
(3) dissolving sodium bicarbonate in deionized water with the mass of 350 times that of 300-fold, adding 1/3 pre-emulsion, heating to 65-75 ℃, then adding 1/2 ammonium persulfate solution, and uniformly stirring to obtain seed emulsion for later use;
(4) adding a styrene microsphere solution, a dodecyl alcohol ester and a polyamine curing agent into the seed emulsion, stirring uniformly, then adding the rest pre-emulsion and an ammonium persulfate solution in batches, adding ammonia water to adjust the pH value to 7.5-8.0 when the emulsion shows milky bluish color, finally adding heavy calcium powder, stirring for 25-35 minutes, and adding water to adjust to proper viscosity, thus obtaining the emulsion.
2. The efficient anticorrosive water-based acrylic coating as claimed in claim 1, which is prepared from the following raw materials in parts by weight: 55 parts of methyl methacrylate, 13.5 parts of styrene, 4 parts of styrene microsphere solution, 63 parts of n-butyl acrylate, 6 parts of gamma-methacryloxypropyltrimethoxysilane, 5 parts of sodium dodecyl sulfate, 11 parts of alkylphenol polyoxyethylene, 0.07 part of ammonium persulfate, 0.06 part of sodium bicarbonate, 33 parts of coarse whiting powder, 9 parts of dodecanol ester, 0.4 part of polyamine curing agent, a proper amount of ammonia water and a proper amount of deionized water.
3. The efficient anticorrosive water-based acrylic coating as claimed in claim 1, wherein the amount of deionized water added in step (1) is controlled to be an amount of 1: (0.65-0.75).
4. The high-efficiency anticorrosion water-based acrylic paint as claimed in claim 1, wherein the residual pre-emulsion and ammonium persulfate solution in step (4) are added in two times, half of the residual pre-emulsion and ammonium persulfate solution are added in each time, the interval between each addition is 30 minutes, and the temperature is kept between 65 ℃ and 75 ℃ in the whole process.
5. The high-efficiency anticorrosion water-based acrylic paint as claimed in claim 1, wherein the stirring rate is controlled to be 600-1000 rpm/min after the heavy calcium powder is added in the step (4).
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Address after: 262200 Guojiatun village, Xiangzhou Town, Zhucheng City, Weifang City, Shandong Province Patentee after: Shandong Yuanyue New Materials Co.,Ltd. Country or region after: China Address before: 262200 Guojiatun village, Xiangzhou Town, Zhucheng City, Weifang City, Shandong Province Patentee before: SHANDONG YELEE PAINT CO.,LTD. Country or region before: China |