CN113789102A - Quick-drying high-weather-resistance acrylic acid mechanical universal coating and preparation method and application thereof - Google Patents
Quick-drying high-weather-resistance acrylic acid mechanical universal coating and preparation method and application thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of coatings. The invention provides a quick-drying high-weather-resistance general coating for acrylic machinery, which comprises 95-135 parts of modified acrylic silicone resin, 35-45 parts of a water-based isocyanate curing agent, 10-20 parts of precipitated barium sulfate, 20-30 parts of ferric chloride, 5-10 parts of a dispersing agent and 3-8 parts of a flatting agent. According to the preparation method, the gamma-methacryloxypropyltrimethoxysilane and the acrylic monomer are polymerized to obtain the modified acrylic silicon resin, so that the weather resistance and the water resistance of the acrylic coating are improved; the modified acrylic silicone resin and the water-based isocyanate curing agent are combined, and hydroxyl groups in the coating and isocyanate groups in the curing agent are crosslinked and cured after coating, so that the surface drying time is reduced, and the coating has quick drying performance after coating. The coating provided by the application is low in cost and simple in process, and can effectively slow down the corrosion of metal after the mechanical surface is coated, so that the cost is reduced.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a quick-drying high-weather-resistance acrylic acid mechanical universal coating and a preparation method and application thereof.
Background
Mechanical engineering aims at increasing production, improving labor productivity and improving production economy to develop and develop new mechanical products, which not only reduce human labor, but also create huge benefits. However, in the use process of these products, losses occur to different degrees due to changes of use environment, changes of pH value, erosion of moisture and the like, the service life of the machine is accelerated after the losses occur, the cost is increased, and the metal loss on the surface of the machine accounts for most of the production cost in statistics. Various methods have been developed to reduce the loss, among which a method of applying oil to the surface of metal, a method of covering an oxide layer, a method of manufacturing an anti-corrosion alloy, and the like. However, the above method is not only complex in process but also high in cost, and deviates from the original purpose of metal corrosion prevention. There is a need for a new method to improve the corrosion resistance of metal surfaces.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a quick-drying high-weather-resistance acrylic acid mechanical universal coating as well as a preparation method and application thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a quick-drying high-weather-resistance general paint for acrylic machinery, which is prepared from the following raw materials in parts by mass:
95-135 parts of modified acrylic silicone resin, 35-45 parts of water-based isocyanate curing agent, 10-20 parts of precipitated barium sulfate, 20-30 parts of ferric chloride, 5-10 parts of dispersing agent and 3-8 parts of flatting agent.
Preferably, the modified acrylic silicone resin is prepared from the following raw materials in percentage by mass:
acrylic acid monomer: gamma-methacryloxypropyltrimethoxysilane: potassium persulfate: emulsifier: 20-30% of water: 5-10: 0.5-1: 2-3: 70-90;
the acrylic monomer comprises the following components in parts by mass:
20-25 parts of methyl methacrylate, 20-25 parts of butyl methacrylate and 1-2 parts of acrylic acid;
the emulsifier is one or more of OP-10, APG and AES.
Preferably, the preparation method of the modified acrylic silicone resin comprises the following steps:
(1) dispersing potassium persulfate, an emulsifier and the first part of water to obtain a substrate system;
(2) mixing an acrylic monomer with a substrate system to obtain a monomer system;
(3) and mixing the monomer system, the gamma-methacryloxypropyltrimethoxysilane and the rest water to perform polymerization reaction, thereby obtaining the acrylic mechanical universal coating.
Preferably, the mass of the first part of water in the step (1) is 40-50% of the mass of water;
the rotating speed of the dispersion in the step (1) is 400-500 rpm, the dispersion time is 20-30 min, and the dispersion temperature is 70-80 ℃;
the mixing mode in the step (2) is stirring, the rotating speed of the stirring is 400-500 rpm, the stirring time is 10-20 min, and the stirring temperature is 70-80 ℃.
Preferably, the monomer system is mixed with water in the step (3), and then gamma-methacryloxypropyltrimethoxysilane is added dropwise; the dropping rate is 400-500 mL/h;
the temperature of the polymerization reaction in the step (3) is 70-80 ℃, the time of the polymerization reaction is 3-4 h, the polymerization reaction is carried out under the condition of stirring, and the rotating speed of the stirring is 200-300 rpm.
Preferably, the particle size of the precipitated barium sulfate is 200-300 μm, and the particle size of the ferric chloride is 200-300 μm.
The invention also provides a preparation method of the acrylic mechanical universal coating, which comprises the following steps:
(a) dispersing the modified acrylic silicone resin, the precipitated barium sulfate, the ferric chloride, the dispersing agent and the flatting agent to obtain mixed slurry;
(b) and mixing the mixed slurry and the water-based isocyanate curing agent to obtain the general acrylic mechanical coating.
Preferably, the rotation speed of the dispersion in the step (a) is 300-400 rpm, and the dispersion time is 15-25 min.
Preferably, the mixing mode in the step (b) is stirring, the rotating speed of the stirring is 600-800 rpm, and the stirring time is 2-4 min.
The invention also provides application of the acrylic acid mechanical general paint in steel structure coating.
The invention provides a quick-drying high-weather-resistance acrylic acid mechanical general paint which comprises modified acrylic acid silicone resin, a water-based isocyanate curing agent, precipitated barium sulfate, ferric chloride, a dispersing agent and a flatting agent. According to the preparation method, the gamma-methacryloxypropyltrimethoxysilane and the acrylic monomer are polymerized to obtain the modified acrylic silicon resin, so that the weather resistance and the water resistance of the acrylic coating are improved; the modified acrylic silicone resin is combined with the water-based isocyanate curing agent, and hydroxyl groups in the coating and isocyanate groups in the curing agent are crosslinked and cured after coating, so that the surface drying time is reduced, and the coating shows quick drying performance after coating; ferric ions in the ferric chloride are chelated with unreacted hydroxyl and carboxyl in the coating to form a structure of a substrate, resin and ferric chloride from bottom to top, so that the adhesive force of the coating is enhanced; the precipitated barium sulfate is used as a body filler, the water resistance of the coating is improved, the dispersing agent can prevent the effective components in the coating from settling, and the uniformity of a coating system is ensured. The coating provided by the application is low in cost and simple in process, and can effectively slow down the corrosion of metal after the mechanical surface is coated, so that the cost is reduced.
Detailed Description
The invention provides a quick-drying high-weather-resistance general paint for acrylic machinery, which is prepared from the following raw materials in parts by mass:
95-135 parts of modified acrylic silicone resin, 35-45 parts of water-based isocyanate curing agent, 10-20 parts of precipitated barium sulfate, 20-30 parts of ferric chloride, 5-10 parts of dispersing agent and 3-8 parts of flatting agent.
In the invention, the modified acrylic silicone resin is 95-135 parts, preferably 100-130 parts, and more preferably 110-120 parts.
In the invention, the aqueous isocyanate curing agent is 35-45 parts, preferably 36-44 parts, and more preferably 38-42 parts.
In the invention, the precipitated barium sulfate is 10-20 parts, preferably 12-18 parts, and more preferably 14-16 parts.
In the invention, the ferric chloride is 20-30 parts, preferably 22-28 parts, and more preferably 24-26 parts.
In the invention, the dispersant is 5-10 parts, preferably 6-9 parts, and more preferably 7-8 parts.
In the present invention, the dispersant is an RS610 dispersant, an AMP-95 dispersant or a BYK-199 dispersant.
In the invention, the leveling agent is 3-8 parts, preferably 4-7 parts, and more preferably 5-6 parts.
In the invention, the leveling agent is a Perenol F40 leveling agent, a BYK-VP-354 leveling agent, a BYK-VP-3609 leveling agent or a Tego300 leveling agent.
In the present invention, the dispersant and the leveling agent are commercially available.
In the present invention, the modified acrylic silicone resin is preferably prepared from raw materials comprising the following mass ratios:
acrylic acid monomer: gamma-methacryloxypropyltrimethoxysilane: potassium persulfate: emulsifier: 20-30% of water: 5-10: 0.5-1: 2-3: 70-90.
In the present invention, the acrylic monomer: gamma-methacryloxypropyltrimethoxysilane: potassium persulfate: emulsifier: the mass ratio of water is preferably 20-30: 5-10: 0.5-1: 2-3: 70 to 90, preferably 22 to 28: 6-9: 0.6-0.9: 2.2-2.8: 75-85, more preferably 24-26: 7-8: 0.7-0.8: 2.4-2.6: 78-82.
In the present invention, the acrylic monomer preferably contains the following components in parts by mass:
20-25 parts of methyl methacrylate, 20-25 parts of butyl methacrylate and 1-2 parts of acrylic acid.
In the present invention, the amount of the methyl methacrylate is preferably 20 to 25 parts, more preferably 21 to 24 parts, and still more preferably 22 to 23 parts.
In the present invention, the butyl methacrylate is preferably 20 to 25 parts, more preferably 21 to 24 parts, and still more preferably 22 to 23 parts.
In the present invention, the acrylic acid is preferably 1 to 2 parts, more preferably 1.2 to 1.8 parts, and still more preferably 1.4 to 1.6 parts.
In the invention, methyl methacrylate is selected as a rigid monomer, so that the impact resistance of the coating is determined; butyl methacrylate is a flexible monomer, so that the water resistance of the coating can be improved; the acrylic acid affects the degree of reaction, the more acrylic acid, the poorer the water resistance, and the less acrylic acid, the system cannot be effectively dispersed, and the performance of the coating is affected.
In the invention, the emulsifier is preferably one or more of OP-10, APG and AES.
In the present invention, the method for preparing the modified acrylic silicone resin preferably comprises the steps of:
(1) dispersing potassium persulfate, an emulsifier and the first part of water to obtain a substrate system;
(2) mixing an acrylic monomer with a substrate system to obtain a monomer system;
(3) and mixing the monomer system, the gamma-methacryloxypropyltrimethoxysilane and the rest water to perform polymerization reaction, thereby obtaining the modified acrylic silicon resin.
In the present invention, the mass of the first portion of water in the step (1) is preferably 40 to 50% of the mass of water, more preferably 42 to 48%, and even more preferably 44 to 46%.
In the invention, the rotation speed of the dispersion in the step (1) is preferably 400-500 rpm, more preferably 420-480 rpm, and even more preferably 440-460 rpm; the dispersing time is preferably 20-30 min, more preferably 22-28 min, and even more preferably 24-26 min; the temperature of the dispersion is preferably 70-80 ℃, more preferably 72-78 ℃, and even more preferably 74-76 ℃.
In the invention, the mixing mode in the step (2) is preferably stirring, and the rotating speed of the stirring is preferably 400-500 rpm, more preferably 420-480 rpm, and even more preferably 440-460 rpm; the stirring time is preferably 10-20 min, more preferably 12-18 min, and even more preferably 14-16 min; the stirring temperature is preferably 70-80 ℃, more preferably 72-78 ℃, and even more preferably 74-76 ℃.
In the invention, the preferred mixing in step (3) is to add gamma-methacryloxypropyltrimethoxysilane dropwise after mixing the monomer system and water; the dropping rate is preferably 400-500 mL/h, more preferably 420-480 mL/h, and even more preferably 440-460 mL/h.
In the invention, the particle size of the modified acrylic silicon resin is controlled by controlling the dropping rate, so that the brushing performance of the coating is changed; the silane monomer and the acrylic acid monomer which are added at too high a dropping rate cannot fully react, and the modified acrylic acid silicone resin with a uniform system cannot be obtained; the dropping speed is too slow, the reaction cost is increased, and the acrylic acid monomer is wasted.
In the invention, the polymerization reaction temperature in the step (3) is preferably 70-80 ℃, more preferably 72-78 ℃, and even more preferably 74-76 ℃; the time of the polymerization reaction is preferably 3-4 h, more preferably 3.2-3.8 h, and even more preferably 3.4-3.6 h; the polymerization reaction is preferably carried out under a stirring condition, and the rotation speed of the stirring is preferably 200 to 300rpm, more preferably 220 to 280rpm, and even more preferably 240 to 260 rpm.
In the invention, the polymerization reaction is carried out at a specific temperature, the temperature is an important factor influencing the polymerization reaction, the conversion rate of the monomer is determined, and a system with high solid content can be obtained; thereby changing the comprehensive performance of the coating.
In the invention, the rotating speed of the polymerization reaction influences the stability of the system and can also control the particle size of the modified acrylic silicone resin, thereby influencing the performance of the coating.
In the invention, acrylic monomers and gamma-methacryloxypropyltrimethoxysilane are polymerized, and a silicon-oxygen bond and a carbon-silicon bond are introduced, so that the bonds are high in energy, difficult to break, stable in chemical property and excellent in weather resistance.
In the invention, the particle size of the precipitated barium sulfate is preferably 200-300 μm, more preferably 220-280 μm, and even more preferably 240-260 μm; the particle size of the ferric chloride is preferably 200-300 μm, more preferably 220-280 μm, and even more preferably 240-260 μm.
In the invention, the addition of barium sulfate can improve the water resistance of the coating and the surface hardness of the coating, and prevent the coating from being damaged; ferric ions in the ferric chloride are chelated with unreacted hydroxyl and carboxyl in the coating to form a structure of a substrate, resin and ferric chloride from bottom to top, so that the adhesive force of the coating is enhanced.
The invention also provides a preparation method of the acrylic mechanical universal coating, which comprises the following steps:
(a) dispersing the modified acrylic silicone resin, the precipitated barium sulfate, the ferric chloride, the dispersing agent and the flatting agent to obtain mixed slurry;
(b) and mixing the mixed slurry and the water-based isocyanate curing agent to obtain the general acrylic mechanical coating.
In the invention, the rotation speed of the dispersion in the step (a) is preferably 300-400 rpm, more preferably 320-380 rpm, and more preferably 340-360 rpm; the dispersing time is preferably 15-25 min, more preferably 16-24 min, and even more preferably 18-22 min.
In the present invention, the mixing in step (b) is preferably performed by stirring, and the rotation speed of the stirring is preferably 600 to 800rpm, more preferably 650 to 750rpm, and even more preferably 680 to 720 rpm; the stirring time is preferably 2-4 min, more preferably 2.5-3.5 min, and even more preferably 2.8-3.2 min.
In the invention, the coating is prepared as required, because the isocyanate group in the water-based isocyanate curing agent and the hydroxyl group in the modified acrylic silicon resin can be crosslinked and cured, which affects the use of the coating; meanwhile, due to the crosslinking reaction, the surface drying time after the coating is coated is greatly reduced, and the waiting time is reduced.
The invention also provides application of the acrylic acid mechanical general paint in steel structure coating.
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
Taking 100g of acrylic monomer, 32g of gamma-methacryloxypropyltrimethoxysilane, 2.8g of potassium persulfate, 10gOP-10 and 320g of water; wherein, the acrylic monomer comprises 23 parts of methyl methacrylate, 22 parts of butyl methacrylate and 1.5 parts of acrylic acid.
Dispersing potassium persulfate, OP-10 and 144g of water at the rotating speed of 450rpm and the temperature of 75 ℃ for 25min to obtain a substrate system; stirring acrylic monomers and a substrate system at the rotating speed of 450rpm and the temperature of 75 ℃ for 15min to obtain a monomer system; mixing the monomer system and the rest water, adjusting the rotating speed to 250rpm and the temperature to 75 ℃, dropwise adding gamma-methacryloxypropyltrimethoxysilane at the speed of 450mL/h, reacting for 3.5h after the dropwise adding is finished, obtaining the modified acrylic silicone resin, and detecting the properties of the modified acrylic silicone resin obtained in the embodiment as shown in Table 1.
TABLE 1
| Modified acrylic silicone resin | |
| Hydroxyl value (mgKOH/g) | 112 |
| Tg(℃) | 28 |
| Solid content (%) | 46 |
| Viscosity (mPa. s) | 105 |
| pH | 7.1 |
As can be seen from Table 1, the modified acrylic silicone resin prepared by this example has excellent properties, and the hydroxyl value and Tg meet the requirements as a coating matrix.
115 parts of modified acrylic silicone resin, 40 parts of aqueous isocyanate curing agent, 15 parts of precipitated barium sulfate with the particle size of 250 micrometers, 25 parts of ferric chloride with the particle size of 250 micrometers, 8 parts of RS610 dispersing agent and 5 parts of Perenol F40 leveling agent are taken.
Dispersing the modified acrylic silicone resin, the precipitated barium sulfate, the ferric chloride, the dispersing agent and the flatting agent at the rotating speed of 350rpm for 20min to obtain mixed slurry; and stirring the mixed slurry and the water-based isocyanate curing agent for 3min at the rotating speed of 700rpm to obtain the general acrylic mechanical coating.
The quick-drying high weather-resistant acrylic mechanical general paint prepared in the example is measured for adhesion according to GB/T1720-1989, impact resistance according to GB/T1732-2993, hardness according to GB/T6739-1996, water resistance according to GB/T1733-93, weather resistance according to GB/T1865-80, surface drying time according to GB/T1728-79(88), and abrasion resistance according to GB/T1768-1989. The results of the measurements are reported in table 6.
Example 2
Taking 40g of acrylic monomer, 10g of gamma-methacryloxypropyltrimethoxysilane, 1g of potassium persulfate, 4g of APG and 140g of water; wherein the acrylic monomer comprises 20 parts of methyl methacrylate, 20 parts of butyl methacrylate and 1 part of acrylic acid.
Dispersing potassium persulfate, APG and 56g of water at the rotating speed of 400rpm and the temperature of 70 ℃ for 20min to obtain a substrate system; stirring acrylic monomers and a substrate system at the rotating speed of 400rpm at the temperature of 75 ℃ for 10min to obtain a monomer system; mixing the monomer system and the rest water, adjusting the rotating speed to 200rpm and the temperature to 70 ℃, dropwise adding gamma-methacryloxypropyltrimethoxysilane at the speed of 400mL/h, reacting for 3h after the dropwise adding is finished, obtaining the modified acrylic silicone resin, and detecting the properties of the modified acrylic silicone resin obtained by the embodiment as shown in Table 2.
TABLE 2
| Modified acrylic silicone resin | |
| Hydroxyl value (mgKOH/g) | 105 |
| Tg(℃) | 29.3 |
| Solid content (%) | 45 |
| Viscosity (mPa. s) | 100 |
| pH | 7.1 |
As can be seen from Table 2, the modified acrylic silicone resin prepared by this example has excellent properties, and the hydroxyl value and Tg meet the requirements as a coating matrix.
Taking 95 parts of modified acrylic silicone resin, 35 parts of aqueous isocyanate curing agent, 10 parts of precipitated barium sulfate with the particle size of 200 mu m, 20 parts of ferric chloride with the particle size of 200 mu m, 5 parts of AMP-95 dispersing agent and 3 parts of Tego300 flatting agent.
Dispersing the modified acrylic silicone resin, the precipitated barium sulfate, the ferric chloride, the dispersing agent and the flatting agent for 15min at the rotating speed of 300rpm to obtain mixed slurry; and stirring the mixed slurry and the water-based isocyanate curing agent for 2min at the rotating speed of 600rpm to obtain the general acrylic mechanical coating.
The quick-drying weather-resistant acrylic mechanical universal paint prepared in this example was tested according to the method in example 1. The results of the measurements are reported in table 6.
Example 3
Taking 180g of acrylic monomer, 60g of gamma-methacryloxypropyltrimethoxysilane, 6g of potassium persulfate, 18g of AES and 540g of water; wherein, the acrylic monomer comprises 25 parts of methyl methacrylate, 25 parts of butyl methacrylate and 2 parts of acrylic acid, the rotation speed of 500rpm is high, and the acrylic acid is dispersed for 30min at 80 ℃ to obtain a substrate system; stirring acrylic monomers and a substrate system at the rotating speed of 500rpm and the temperature of 80 ℃ for 20min to obtain a monomer system; mixing the monomer system and the rest water, adjusting the rotating speed to 300rpm and the temperature to 80 ℃, dropwise adding gamma-methacryloxypropyltrimethoxysilane at the rate of 500mL/h, reacting for 4h after the dropwise adding is finished, obtaining modified acrylic silicone resin, and detecting the properties of the modified acrylic silicone resin obtained in the embodiment as shown in Table 3.
TABLE 3
| Modified acrylic silicone resin | |
| Hydroxyl value (mgKOH/g) | 114 |
| Tg(℃) | 28.6 |
| Solid content (%) | 47 |
| Viscosity (mPa. s) | 102 |
| pH | 7 |
As can be seen from Table 3, the modified acrylic silicone resin prepared by this example is excellent in performance, and the hydroxyl value and Tg meet the requirements as a coating matrix.
135 parts of modified acrylic silicone resin, 45 parts of aqueous isocyanate curing agent, 20 parts of precipitated barium sulfate with the particle size of 300 mu m, 30 parts of ferric chloride with the particle size of 230 mu m, 10 parts of BYK-199 dispersing agent and 8 parts of BYK-VP-354 flatting agent are taken.
Dispersing the modified acrylic silicone resin, the precipitated barium sulfate, the ferric chloride, the dispersing agent and the flatting agent at the rotating speed of 400rpm for 25min to obtain mixed slurry; and stirring the mixed slurry and the water-based isocyanate curing agent for 4min at the rotating speed of 800rpm to obtain the general acrylic mechanical coating.
The quick-drying weather-resistant acrylic mechanical universal paint prepared in this example was tested according to the method in example 1. The results of the measurements are reported in table 6.
Comparative example 1
The comparative example is different from example 1 in that the amount of gamma-methacryloxypropyltrimethoxysilane used was adjusted to 100g, and the remaining conditions were not changed, and the properties of the modified acrylic silicone resin prepared by the test were as shown in Table 4.
TABLE 4
| Modified acrylic silicone resin | |
| Hydroxyl value (mgKOH/g) | 142 |
| Tg(℃) | 12 |
| Solid content (%) | 43 |
| Viscosity (mPa. s) | 98 |
| pH | 7 |
As can be seen from Table 4, as the amount of gamma-methacryloxypropyltrimethoxysilane used was increased, the hydroxyl number and Tg were also changed, but the coating material was still usable.
The modified coating prepared in this comparative example was tested as in example 1. The results of the measurements are reported in table 6.
Comparative example 2
The comparative example is different from example 1 in that the dropping rate of gamma-methacryloxypropyltrimethoxysilane was adjusted to 1.5L/h, the remaining conditions were not changed, and the properties of the modified acrylic silicone resin prepared by the test were as shown in Table 5.
TABLE 5
| Modified acrylic silicone resin | |
| Hydroxyl value (mgKOH/g) | 128 |
| Tg(℃) | 14 |
| Solid content (%) | 43 |
| Viscosity (mPa. s) | 98 |
| pH | 7 |
As can be seen from Table 5, after the dropping rate was too fast, part of the gamma-methacryloxypropyltrimethoxysilane had too much time to undergo polymerization, which affected the resin properties.
The modified coating prepared in this comparative example was tested as in example 1. The results of the measurements are reported in table 6.
Comparative example 3
The comparative example differs from example 1 in that the amount of the aqueous isocyanate curing agent added was 70 parts, and the remaining conditions were unchanged; the modified coating prepared in this comparative example was tested as in example 1. The results of the measurements are reported in table 6.
TABLE 6
It can be seen from the above examples that, after the usage amount of gamma-methacryloxypropyltrimethoxysilane is increased or the dropping rate is increased, the performance of the paint is seriously affected because unreacted gamma-methacryloxypropyltrimethoxysilane exists in the paint, which cannot be used as an effective component to improve the performance of the paint; after the addition of the water-based isocyanate curing agent is increased, redundant isocyanate groups in a coating system react with water to generate carbon dioxide which escapes from the coating, and pinholes are formed to reduce the weather resistance of the coating. The coating obtained within the dosage range of the invention has excellent comprehensive performance, short drying time after coating, excellent water resistance and weather resistance, and avoids the corrosion of mechanical products in open air environment due to rain and the like.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The quick-drying high-weather-resistance acrylic acid mechanical general paint is characterized by being prepared from the following raw materials in parts by mass:
95-135 parts of modified acrylic silicone resin, 35-45 parts of water-based isocyanate curing agent, 10-20 parts of precipitated barium sulfate, 20-30 parts of ferric chloride, 5-10 parts of dispersing agent and 3-8 parts of flatting agent.
2. The coating of claim 1, wherein the modified acrylic silicone resin is prepared from raw materials comprising, by mass:
acrylic acid monomer: gamma-methacryloxypropyltrimethoxysilane: potassium persulfate: emulsifier: 20-30% of water: 5-10: 0.5-1: 2-3: 70-90;
the acrylic monomer comprises the following components in parts by mass:
20-25 parts of methyl methacrylate, 20-25 parts of butyl methacrylate and 1-2 parts of acrylic acid;
the emulsifier is one or more of OP-10, APG and AES.
3. The coating of claim 2, wherein the modified acrylic silicone resin is prepared by a process comprising the steps of:
(1) dispersing potassium persulfate, an emulsifier and the first part of water to obtain a substrate system;
(2) mixing an acrylic monomer with a substrate system to obtain a monomer system;
(3) and mixing the monomer system, the gamma-methacryloxypropyltrimethoxysilane and the rest water to perform polymerization reaction, thereby obtaining the modified acrylic silicon resin.
4. The coating of claim 3, wherein the mass of the first portion of water in step (1) is 40-50% of the mass of water;
the rotating speed of the dispersion in the step (1) is 400-500 rpm, the dispersion time is 20-30 min, and the dispersion temperature is 70-80 ℃;
the mixing mode in the step (2) is stirring, the rotating speed of the stirring is 400-500 rpm, the stirring time is 10-20 min, and the stirring temperature is 70-80 ℃.
5. The coating of claim 3 or 4, wherein the mixing in step (3) is performed by adding gamma-methacryloxypropyltrimethoxysilane dropwise after mixing the monomer system with water; the dropping rate is 400-500 mL/h;
the temperature of the polymerization reaction in the step (3) is 70-80 ℃, the time of the polymerization reaction is 3-4 h, the polymerization reaction is carried out under the condition of stirring, and the rotating speed of the stirring is 200-300 rpm.
6. The coating according to claim 1, 2, 3 or 4, wherein the particle size of the precipitated barium sulfate is 200 to 300 μm, and the particle size of the ferric chloride is 200 to 300 μm.
7. The method for preparing the acrylic mechanical universal paint as claimed in any one of claims 1 to 6, characterized by comprising the following steps:
(a) dispersing the modified acrylic silicone resin, the precipitated barium sulfate, the ferric chloride, the dispersing agent and the flatting agent to obtain mixed slurry;
(b) and mixing the mixed slurry and the water-based isocyanate curing agent to obtain the general acrylic mechanical coating.
8. The method according to claim 7, wherein the dispersion in the step (a) is performed at a rotation speed of 300 to 400rpm for 15 to 25 min.
9. The method according to claim 7 or 8, wherein the mixing in step (b) is performed by stirring, the rotation speed of the stirring is 600 to 800rpm, and the stirring time is 2 to 4 min.
10. Use of the acrylic mechanical universal coating according to any one of claims 1 to 6 for steel structure coating.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111241080.6A CN113789102A (en) | 2021-10-25 | 2021-10-25 | Quick-drying high-weather-resistance acrylic acid mechanical universal coating and preparation method and application thereof |
| PCT/CN2021/139902 WO2023070910A1 (en) | 2021-10-25 | 2021-12-21 | Quick-drying high-weather-resistance acrylic acid mechanical universal coating and preparation method therefor and application thereof |
| ZA2022/01726A ZA202201726B (en) | 2021-10-25 | 2022-02-09 | Quick-drying, highly weather-resistant and mechanically-universal acrylic coating, preparation method therefor, and use thereof |
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| CN202111241080.6A CN113789102A (en) | 2021-10-25 | 2021-10-25 | Quick-drying high-weather-resistance acrylic acid mechanical universal coating and preparation method and application thereof |
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| CN113789102A true CN113789102A (en) | 2021-12-14 |
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| Country | Link |
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| CN (1) | CN113789102A (en) |
| WO (1) | WO2023070910A1 (en) |
| ZA (1) | ZA202201726B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023070910A1 (en) * | 2021-10-25 | 2023-05-04 | 江苏冠军科技集团股份有限公司 | Quick-drying high-weather-resistance acrylic acid mechanical universal coating and preparation method therefor and application thereof |
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| CN115044266A (en) * | 2022-07-22 | 2022-09-13 | 山东华诚高科胶粘剂有限公司 | Mechanical corrosion-resistant water-based quick-drying salt-fog-resistant acrylic coating and preparation method thereof |
| CN116875181A (en) * | 2023-07-24 | 2023-10-13 | 广东美涂士建材股份有限公司 | High-hardness hydrophobic finish varnish and preparation method thereof |
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| ZA202201726B (en) | 2022-05-25 |
| WO2023070910A1 (en) | 2023-05-04 |
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Application publication date: 20211214 |