CN115746667A - High-temperature-resistant impact-resistant powder coating and preparation method thereof - Google Patents
High-temperature-resistant impact-resistant powder coating and preparation method thereof Download PDFInfo
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Abstract
The invention relates to the technical field of powder coatings, in particular to a high-temperature-resistant impact-resistant powder coating and a preparation method thereof. Through detection: after the powder coating is baked for 24 hours at 500 ℃, the color difference is less than 1.0, the gloss retention is 80, the adhesion grade (cross-cut method) is 0, and the impact strength is more than +/-50 kg cm.
Description
Technical Field
The invention relates to the technical field of powder coatings, in particular to a high-temperature-resistant impact-resistant powder coating and a preparation method thereof.
Background
The powder coating is a solid powder coating without solvent, and is prepared by mixing, crushing, sieving and other processes by utilizing film-forming resin, an auxiliary agent, pigment, a filler and the like. At present, powder coatings are widely used in high temperature resistant devices in various industries such as electric appliances, metallurgy, petroleum, aviation, chemical industry, medicine, food and the like, for example: barbecue ovens, heating ovens, fan heaters, high-temperature lamps, heating pipelines, silencers, smoke dampers and other equipment needing high temperature resistance. With the widespread use of powder coatings, consumers have found that the existing powder coatings suffer from a number of drawbacks: (1) The high temperature resistance is poor, the color difference change before and after high temperature calcination treatment is poor, and the light retention rate is poor; (2) Poor adhesion, easy falling off and poor impact resistance; (3) Improper selection of raw materials causes easy cracking after film forming; and (4) the raw material cost is high, and the obtained powder coating has high cost.
In view of this, researchers have conducted research into powder coating formulation techniques, such as: the patent number 201811631275.X discloses a high-temperature resistant sand grain powder coating and a preparation method thereof, the high-temperature resistant sand grain powder coating is prepared by adopting epoxy resin A, epoxy resin B, organic silicon resin, dicyandiamide, o-cresol linear phenolic aldehyde, closed polyisocyanate, polybenzimidazole, mica powder, talcum powder, wollastonite, silicon micropowder, a sand grain agent, wax powder, an antioxidant, titanium dioxide and a high-temperature resistant pigment through the steps of mixing, extruding, tabletting, crushing and screening, a film with the thickness of 40-60 mu m is formed on a 0.6mm iron plate through high-pressure electrostatic spraying, the impact strength +/-60 kg/cm and the color difference of less than 0.5 can be achieved before and after baking at 350 ℃, the impact strength +/-60 kg/cm and the color difference of less than 0.5 can be achieved before and after baking at 450 ℃, the impact strength +/-50 kg/cm and the color difference of less than 1.0 can be achieved before and after baking at 500 ℃, the adhesion of a lattice method is 1 grade, the impact strength +/-30 kg/cm and the impact strength of less than 1.0 can be achieved before and after baking at 650 ℃. As can be seen, the powder coating obtained by the method has better high-temperature resistance and positive and negative impact resistance, but the adhesion grade is not ideal, and the adopted organic silicon resin has higher proportion and higher cost.
For another example: patent application number 201911003355.5 discloses a high-temperature-resistant flame-retardant powder coating and a preparation method thereof, wherein the high-temperature-resistant flame-retardant powder coating is prepared from organic silicon resin, epoxy resin, modified dicyandiamide, dimethyl imidazole, silicon micropowder, mica powder, a sand textured agent, a flame retardant and carbon black to achieve the purpose of enhancing heat resistance and flame retardance, however, the highest temperature resistance of the method can reach 600 ℃, and the impact strength can reach 150kg/cm, which obviously exceeds the technical effect which can be reached by the prior art, and the adopted organic silicon resin has higher dosage and equal mass ratio with the replaced epoxy resin, so that the overall cost of the powder coating is still higher.
Therefore, on the premise of ensuring the application performance of the powder coating and stabilizing the high temperature resistance, the impact resistance, the adhesive force and the like, how to reduce the preparation cost of the powder coating and the cost of applying the powder coating by consumers becomes a key factor of occupying market share of powder coating enterprises.
Based on this, the research team of the company comprehensively considers and combines with practical experience of researching and manufacturing the powder coating for a long time, researches the powder coating taking the organic silicon resin as the basic raw material and provides a new idea for preparing the high-temperature resistant and impact resistant powder coating.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a high-temperature-resistant impact-resistant powder coating and a preparation method thereof.
The method is realized by the following technical scheme:
the invention provides a high-temperature-resistant impact-resistant powder coating, which comprises the following raw materials in parts by mass: 300-400 parts of epoxy resin, 15-20 parts of micro-powder dicyandiamide, 100-200 parts of organic silicon resin, 4-6 parts of curing agent, 20-40 parts of heat stabilizer, 130-140 parts of ferromanganese black, 10-20 parts of copper chromium black, 4-10 parts of flatting agent, 10-15 parts of adhesion promoter, 30-40 parts of mica powder, 20-30 parts of talcum powder and 210-220 parts of barium sulfate; through selecting the raw material components and properly matching the raw material components, the comprehensive performance of the powder coating is ensured, the high-temperature resistance and impact resistance of the powder coating are improved, and compared with the prior art, the consumption of organic silicon resin is greatly reduced, and the cost of the powder coating is reduced.
The invention also aims to provide a preparation method of the high-temperature-resistant impact-resistant powder coating, which comprises the following steps:
(1) Putting epoxy resin, micro-powder dicyandiamide, organic silicon resin, a curing agent, a heat stabilizer, ferromanganese black, copper-chromium black, a leveling agent, an adhesion promoter, mica powder, talcum powder and barium sulfate into a stirring and mixing kettle, and uniformly stirring and mixing to obtain a premix;
(2) And melting and mixing the premix, extruding to prepare particles with the particle size of 1-3cm, feeding the particles into a crusher for crushing, feeding the particles into a ball mill for ball milling, and sieving the particles through a 200-240-mesh sieve to obtain the powder coating.
The raw material components are pre-dispersed in a stirring and mixing kettle, and then the raw material components are mixed and uniformly dispersed by utilizing a melting mixing-extruding granulation-crushing-ball milling-screening process, so that the material mixing effect is improved, the overall performance of the obtained powder coating is improved, the high temperature resistance and excellent impact resistance of the powder coating are guaranteed, in addition, epoxy resin with lower cost is adopted to replace a large amount of organic silicon resin, other raw materials are added, and the preparation cost of the powder coating is reduced on the basis of guaranteeing the excellent comprehensive performance of the powder coating.
Compared with the prior art, the technical effects created by the invention are as follows:
the invention selects the epoxy resin, the micro-powder dicyandiamide, the organic silicon resin, the curing agent, the heat stabilizer, the ferromanganese black, the copper-chromium black, the flatting agent, the adhesion promoter, the mica powder, the talcum powder and the barium sulfate as raw material components, and properly controls the use amount of each raw material component, so that the use amount of the epoxy resin is far higher than that of the organic silicon resin, and the powder coating has excellent high temperature resistance, impact resistance and other performances, and the preparation cost of the powder coating is greatly reduced. Through detection: after the powder coating is baked for 24 hours at 500 ℃, the color difference is less than 1.0, the gloss retention is 80, the adhesion grade (cross-cut method) is 0, and the impact strength is more than +/-50 kg cm.
The invention has simple preparation process and low raw material cost, and is easy for industrialized popularization and implementation.
Drawings
FIG. 1 is a schematic view of the preparation process of the present invention.
FIG. 2 is a photograph of the powder coating sprayed on the surface of a steel plate according to the present invention.
Detailed Description
The technical solution of the present invention is further defined below with reference to specific embodiments, but the scope of protection is not limited to the description.
In some embodiments, the high-temperature resistant and impact resistant powder coating comprises the following raw material components in parts by mass: 300-400 parts of epoxy resin, 15-20 parts of micro powder dicyandiamide, 100-200 parts of organic silicon resin, 4-6 parts of curing agent, 20-40 parts of heat stabilizer, 130-140 parts of ferromanganese black, 10-20 parts of copper chromium black, 4-10 parts of flatting agent, 10-15 parts of adhesion promoter, 30-40 parts of mica powder, 20-30 parts of talcum powder and 210-220 parts of barium sulfate. For example: 300 parts of epoxy resin, 15 parts of micro powder dicyandiamide, 100 parts of organic silicon resin, 4 parts of curing agent, 20 parts of heat stabilizer, 130 parts of ferromanganese black, 10 parts of copper-chromium black, 4 parts of flatting agent, 10 parts of adhesion promoter, 30 parts of mica powder, 20 parts of talcum powder and 210 parts of barium sulfate; for another example: 400 parts of epoxy resin, 20 parts of micro-powder dicyandiamide, 200 parts of organic silicon resin, 6 parts of curing agent, 40 parts of heat stabilizer, 140 parts of ferromanganese black, 20 parts of copper-chromium black, 10 parts of flatting agent, 15 parts of adhesion promoter, 40 parts of mica powder, 30 parts of talcum powder and 220 parts of barium sulfate; for another example: 330 parts of epoxy resin, 19 parts of micro-powder dicyandiamide, 130 parts of organic silicon resin, 4 parts of curing agent, 35 parts of heat stabilizer, 133 parts of manganese iron black, 17 parts of copper chromium black, 8 parts of flatting agent, 14 parts of adhesion promoter, 38 parts of mica powder, 23 parts of talcum powder and 215 parts of barium sulfate. For another example: 340 parts of epoxy resin, 16 parts of micro powder dicyandiamide, 140 parts of organic silicon resin, 4 parts of curing agent, 24 parts of heat stabilizer, 135 parts of manganese iron black, 14 parts of copper chromium black, 4 parts of flatting agent, 10 parts of adhesion promoter, 34 parts of mica powder, 24 parts of talcum powder and 217 parts of barium sulfate. For another example: 370 parts of epoxy resin, 18 parts of micro-powder dicyandiamide, 170 parts of organic silicon resin, 6 parts of curing agent, 27 parts of heat stabilizer, 140 parts of manganese iron black, 16 parts of copper chromium black, 7 parts of flatting agent, 13 parts of adhesion promoter, 36 parts of mica powder, 27 parts of talcum powder and 220 parts of barium sulfate; for another example: 340 parts of epoxy resin, 18 parts of micro-powder dicyandiamide, 140 parts of organic silicon resin, 6 parts of curing agent, 24 parts of heat stabilizer, 140 parts of manganese iron black, 14 parts of copper chromium black, 7 parts of flatting agent, 10 parts of adhesion promoter, 36 parts of mica powder, 24 parts of talcum powder and 220 parts of barium sulfate; for another example: 370 parts of epoxy resin, 16 parts of micro-powder dicyandiamide, 170 parts of organic silicon resin, 4 parts of curing agent, 27 parts of heat stabilizer, 135 parts of manganese iron black, 16 parts of copper chromium black, 4 parts of flatting agent, 13 parts of adhesion promoter, 34 parts of mica powder, 27 parts of talcum powder and 217 parts of barium sulfate; for another example: 350 parts of epoxy resin, 17.5 parts of micro-powder dicyandiamide, 150 parts of organic silicon resin, 5 parts of curing agent, 30 parts of heat stabilizer, 136 parts of manganese-iron black, 15 parts of copper-chromium black, 6 parts of flatting agent, 12 parts of adhesion promoter, 35 parts of mica powder, 25 parts of talcum powder, 219 parts of barium sulfate and other tissue culture formulas for composite preparation. In each embodiment, the mass ratio of the epoxy resin to the organic silicon resin is strictly required to be 1.5-4, so that the comprehensive performance of the obtained powder coating can be guaranteed, and the powder coating has high temperature resistance and excellent impact resistance.
In certain embodiments, the mica powder has a particle size of 400-700 mesh, for example: 400 meshes, 500 meshes, 600 meshes, 700 meshes and the like. The particle size of the talcum powder is 400-700 meshes, for example: 400 meshes, 430 meshes, 500 meshes, 560 meshes, 600 meshes, 670 meshes, 700 meshes and the like. The filling effect is promoted, the integral performance of the powder coating is guaranteed, filler raw material components such as silica powder with high raw material cost are fully avoided, and the preparation cost of the powder coating is reduced.
In certain embodiments, a method of preparing a high temperature resistant impact resistant powder coating includes the steps of:
(1) Putting epoxy resin, micro-powder dicyandiamide, organic silicon resin, a curing agent, a heat stabilizer, ferromanganese black, copper-chromium black, a leveling agent, an adhesion promoter, mica powder, talcum powder and barium sulfate into a stirring and mixing kettle, and uniformly stirring and mixing to obtain a premix;
(2) The premix is melted and mixed, and is extruded to prepare the mixture with the particle size of 1-3cm, such as: particles of 1cm,1.5cm,2cm,2.5cm,3cm, etc. are sent to a crusher to be crushed, then sent to a ball mill to be ball-milled, and passed through a 200-240 mesh sieve, for example: sieving with 200 mesh, 210 mesh, 220 mesh, 230 mesh, 240 mesh, etc. to obtain powder coating.
The powder coating is prepared by adopting a premixing, melting and mixing, extruding and granulating, crushing, ball milling and screening process, so that the raw material components are mixed and dispersed uniformly, the material mixing effect is improved, the integral performance of the obtained powder coating is improved, and the high temperature resistance and excellent impact resistance of the powder coating are guaranteed.
In certain embodiments, step (1), the agitation speed is from 1000 to 1200r/min, for example: 1000r/min,1100r/min,1200r/min and the like, and the temperature of the mixing process is controlled to be 40-45 ℃, such as: 40 ℃,41 ℃,42 ℃,43 ℃,44 ℃,45 ℃ and the like.
In certain embodiments, the step (2) is to melt-mix the premix and extrude the premix to prepare granules by using a twin-screw extruder, and the temperature of the twin-screw extruder is controlled to be 130 to 150 ℃, for example: the rotating speed of the twin screw is 100-150r/min under the conditions of 130 ℃,132 ℃,137 ℃,140 ℃,145 ℃,150 ℃ and the like, for example: 100r/min,110r/min,120r/min,130r/min,140r/min,150r/min and the like, realizes double-screw stirring, melting, mixing and extrusion, improves the dispersion among material components more uniformly, and improves the comprehensive performance of the powder coating.
In the actual research process, researchers created by the invention develop researches on the influence of related raw material component selection and mixing ratio control on the performance of the powder coating, and now in order to more fully illustrate the technical effects which can be brought by the invention creation so as to facilitate technical personnel in the field to fully and accurately understand the technical scheme created by the invention, the contents of related researches developed by the researchers are described as follows: the particle sizes of the mica powder and the talcum powder adopted in the following research contents are all obtained by sieving a 400-mesh sieve to obtain a bottom material, and then sieving the bottom material by a 700-mesh sieve to obtain powder of a surface material.
Experimental study
1. Test materials
The raw materials adopted by the invention are purchased from the market, wherein:
the epoxy resin is 014u epoxy resin and is purchased from Huangshan Tianma New Material science and technology company; the micro-powder dicyandiamide is micro-powder dicyandiamide with the model number of H209, and is purchased from Hua-Po new material science and technology Limited company in Yangzhou city; the organic silicon resin is the organic silicon resin with the model number of HJ-802 or H601, and is purchased from Hua gather new material science and technology Limited company in Yangzhou city; the curing agent is B1530 and is a curing agent product which is generally available on the market; the heat stabilizer is HS-109, and is purchased from Hua polymer new material science and technology Limited company in Yangzhou city; the ferromanganese black is 2200 in the product model and is purchased from Hua Poly New materials science and technology Co., ltd, yangzhou city; the copper-chromium black is the product model 822A, and is purchased from Hua polymer new material science and technology limited company in Yangzhou city; the adhesion promoter is the adhesion promoter with the model of JF2340, and is purchased from Hua gather new material science and technology limited company in Yangzhou city; mica powder, talcum powder and barium sulfate are all products commonly existing in the market; the leveling agent is a general leveling agent for rainbow cards, and is produced by Ningbo south sea chemical Co.
2. Preparation method
Putting the raw materials into a stirring and mixing kettle, uniformly stirring and mixing at 1000r/min, wherein the temperature in the stirring and mixing process is 40 ℃, and continuously stirring and mixing for 30min to obtain a premix; and melting and mixing the premix by adopting a double-screw extruder at the temperature of 130 ℃ and the stirring speed of the double-screw extruder of 100r/min, extruding and granulating to obtain particles with the particle size of 3cm, cooling to normal temperature, feeding the particles into a crusher for crushing, feeding the particles into a ball mill for ball milling, and sieving by using a 200-mesh sieve to obtain the powder coating.
3. Preparation of powder coating
The selected raw materials are designed according to the mixture ratio shown in the following table 1, and the powder coating sample is prepared according to the preparation method.
TABLE 1
The powder coatings obtained in the examples of table 1 were subjected to performance tests, the results of which are shown in table 2 below.
TABLE 2
The powder coatings obtained in the examples in table 1 were applied to an aluminized steel sheet (thickness between 0.6mm and 0.8 mm) by high-voltage electrostatic spraying, the aluminized steel sheet was degreased and deoiled before the spraying, the thickness of the coating film was 80 μm, and the coating film was cured at 220 ℃ for 20min to obtain a powder coating sample, and the sample was baked at a high temperature (500 ℃) for one day and one night (24 h) to measure the coating performance index of the sample, and the results are shown in table 3 below.
TABLE 3
Remarking: the cold-hot cycle test is to test the adhesive force grade after 5 cycles, and observe whether the film layer cracks; the test was for each cycle: treating at 450 deg.C for 0.5h, soaking in water, and quenching.
As can be seen from tables 1, 2 and 3, the powder coating prepared by the invention has excellent comprehensive performance, the color difference after baking treatment at 500 ℃ is less than 1, the positive and negative impact strength reaches more than 50kg cm, and the requirements of spraying and painting films on equipment such as barbecue ovens, heating ovens and the like can be met. Meanwhile, the dosage of the epoxy resin adopted in the invention is 1.5 to 4 times of that of the organic silicon resin, and the epoxy resin is calculated according to the preparation of the powder coating with the same mass: the commercial silicone resin (H601) is 105 RMB per kg, and the commercial silicone resin (HJ-802) is 108 RMB per kg; the common price of the epoxy resin is 29-32 yuan per kilogram, and therefore, the preparation cost of the powder coating is greatly reduced when 1 kilogram of organic silicon resin is replaced; therefore, the invention is a research on the preparation formula of the low-price powder coating, the preparation process is simple, the performance of the powder coating is excellent, the color difference change after the powder coating is baked at 500 ℃ is less than 1, and the positive and negative impact strength is maintained to be more than 50kg cm.
Application study
350g of epoxy resin (014 u), 17.5g of micro-powder dicyandiamide (H209), 150g of organic silicon resin (HJ-802), 5g of curing agent (B1530), 30g of heat stabilizer (HS-109), 136g of ferromanganese black (2200), 15g of copper chromium black, 6g of flatting agent, 12g of adhesion promoter (JF 2340), 35g of mica powder, 25g of talcum powder and 219g of barium sulfate.
Putting the raw materials into a stirring and mixing kettle, uniformly stirring and mixing at 1200r/min, wherein the temperature in the stirring and mixing process is 45 ℃, and continuously stirring and mixing for 30min to obtain a premix; and (2) melting and mixing the premix by adopting a double-screw extruder at the temperature of 150 ℃ and the stirring speed of the double-screw extruder of 150r/min, extruding and granulating to obtain particles with the particle size of 1cm, cooling to normal temperature, feeding the particles into a crusher for crushing, feeding the particles into a ball mill for ball milling, and sieving by using a 240-mesh sieve to obtain the powder coating.
The obtained powder coating is sprayed on a steel plate for preparing a heating furnace by high-voltage static electricity, before the spraying, the steel plate is degreased and deoiled, the coating thickness is 80 mu m, the steel plate is cured at 220 ℃ for 20min to obtain a coated steel plate, the coated steel plate is baked for one day and one night (24 h) at high temperature (500 ℃), and the coating performance index of a sample (shown in figure 2) is measured, and the result is that: the color difference is less than 0.5, the positive and negative impact strength is 60 kg-cm, the film adhesion grade is 0 grade, and the cold and hot cycle test shows that: no film cracking was observed and the adhesion rating loss was 0.
Comparative test study
Comparison 1:
on the basis of the application study, the addition amount of the HS-109 component was controlled to 0g, and the other applications were studied.
Comparison 2:
on the basis of the application study, the addition amount of the HS-109 component was controlled to 5g, and the other applications were studied.
Comparison 3:
on the basis of the application study, the addition amount of the HS-109 component was controlled to 10g, and the other applications were studied in the same manner.
Comparison 4:
on the basis of the application study, the addition amount of the HS-109 component was controlled to 15g, and the other applications were studied.
Comparison 5:
on the basis of application research, the mica powder and the talcum powder are replaced by the silicon micropowder, and other applications and researches are the same.
Comparison 6:
on the basis of application research, the mica powder is replaced by the silicon micro powder, and other applications and researches are the same.
Comparison 7:
on the basis of application research, the talcum powder is replaced by the silicon micropowder, and other applications and researches are the same.
The preparation processes of the comparisons 1-7 are the same as the application research preparation method and the operation method, the powder coatings obtained by the comparisons 1-7 are sprayed on an aluminized steel plate (the thickness is between 0.6 and 0.8 mm) by high-voltage static electricity, before the spraying, the aluminized steel plate is degreased and deoiled, the thickness of the coating film is 80 mu m, the coating film is cured for 20min at 220 ℃, the powder coating sample is obtained, the sample is baked for one day and one night (24 h) at high temperature resistance, the performance index of the coating layer of the sample is measured, and the measurement results are shown in the following tables 4 and 5.
Table 4 (500 ℃ C.)
TABLE 5 (350 deg.C)
As can be seen from tables 1, 2, 3, 4 and 5, the addition and shortage of HS-109 greatly affect the adhesion strength of the film-forming film layer of the powder coating on the steel plate and the high temperature resistance, so that the impact resistance is reduced after the high temperature resistant baking treatment; the mica powder and the talcum powder are directly replaced by the silicon micropowder, so that the preparation cost is increased, the whole effect of the obtained powder coating is not ideal, and the film layer is easy to crack.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (10)
1. The high-temperature-resistant impact-resistant powder coating is characterized by comprising the following raw materials in parts by mass: 300-400 parts of epoxy resin, 15-20 parts of micro powder dicyandiamide, 100-200 parts of organic silicon resin, 4-6 parts of curing agent, 20-40 parts of heat stabilizer, 130-140 parts of ferromanganese black, 10-20 parts of copper chromium black, 4-10 parts of flatting agent, 10-15 parts of adhesion promoter, 30-40 parts of mica powder, 20-30 parts of talcum powder and 210-220 parts of barium sulfate.
2. The high-temperature-resistant impact-resistant powder coating as claimed in claim 1, wherein the raw material components are, in parts by mass: 340-370 parts of epoxy resin, 16-18 parts of micro-powder dicyandiamide, 140-170 parts of organic silicon resin, 4-6 parts of curing agent, 24-27 parts of heat stabilizer, 135-140 parts of ferromanganese black, 14-16 parts of copper chromium black, 4-7 parts of flatting agent, 10-13 parts of adhesion promoter, 34-36 parts of mica powder, 24-27 parts of talcum powder and 217-220 parts of barium sulfate.
3. The high-temperature-resistant impact-resistant powder coating according to claim 1 or 2, wherein the raw material components are, in parts by mass: 350 parts of epoxy resin, 17.5 parts of micro-powder dicyandiamide, 150 parts of organic silicon resin, 5 parts of curing agent, 30 parts of heat stabilizer, 136 parts of manganese iron black, 15 parts of copper chromium black, 6 parts of flatting agent, 12 parts of adhesion promoter, 35 parts of mica powder, 25 parts of talcum powder and 219 parts of barium sulfate.
4. The high temperature resistant impact resistant powder coating according to claim 1 or 2, wherein the mica powder particle size is 400-700 mesh.
5. The high-temperature-resistant impact-resistant powder coating according to claim 1 or 2, wherein the talc has a particle size of 400 to 700 mesh.
6. A process for preparing a high-temperature-resistant, impact-resistant powder coating according to any one of claims 1 to 5, comprising the steps of:
(1) Putting epoxy resin, micro-powder dicyandiamide, organic silicon resin, a curing agent, a heat stabilizer, ferromanganese black, copper-chromium black, a leveling agent, an adhesion promoter, mica powder, talcum powder and barium sulfate into a stirring and mixing kettle, and uniformly stirring and mixing to obtain a premix;
(2) And melting and mixing the premix, extruding to prepare particles with the particle size of 1-3cm, feeding the particles into a crusher for crushing, feeding the particles into a ball mill for ball milling, and sieving through a 200-240-mesh sieve to obtain the powder coating.
7. The method for preparing a high temperature resistant impact resistant powder coating as claimed in claim 6, wherein in the step (1), the stirring speed is 1000-1200r/min, and the temperature during the mixing process is controlled to be 40-45 ℃.
8. The method for preparing a high temperature resistant impact resistant powder coating as claimed in claim 6, wherein in the step (2), the premix is melt-kneaded and extruded to prepare granules by using a twin-screw extruder, and the temperature of the twin-screw extruder is controlled to be 130-150 ℃, and the twin-screw rotation speed is 100-150r/min.
9. The method for preparing a high temperature resistant and impact resistant powder coating according to claim 8, wherein the temperature of the twin-screw extruder is controlled at 140 ℃ and the rotation speed of the twin-screw extruder is 130r/min.
10. The high temperature resistant impact resistant powder coating according to any one of claims 1 to 5 or the high temperature resistant impact resistant powder coating prepared by the method according to any one of claims 6 to 9 is applied by high voltage electrostatic spraying on a substrate and curing treatment at 220 ℃ for 20 min.
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| CN109762452A (en) * | 2018-12-29 | 2019-05-17 | 山东千江粉末科技有限公司 | A kind of high temperature resistant grit powder coating and preparation method thereof |
| CN110643280A (en) * | 2019-10-22 | 2020-01-03 | 广西南宁维一防腐科技有限公司 | High-temperature-resistant flame-retardant powder coating and preparation method thereof |
| CN112745734A (en) * | 2020-12-15 | 2021-05-04 | 宁波格林斯粉末涂装有限公司 | Open fire resistant barbecue powder coating |
| CN113249015A (en) * | 2021-05-08 | 2021-08-13 | 江门市皇宙实业有限公司 | High-temperature-resistant powder coating and preparation method thereof |
| CN113683941A (en) * | 2021-09-18 | 2021-11-23 | 航佳彩新材料(广东)有限公司 | Open fire-resistant high-temperature powder coating special for fireplace and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109762452A (en) * | 2018-12-29 | 2019-05-17 | 山东千江粉末科技有限公司 | A kind of high temperature resistant grit powder coating and preparation method thereof |
| CN110643280A (en) * | 2019-10-22 | 2020-01-03 | 广西南宁维一防腐科技有限公司 | High-temperature-resistant flame-retardant powder coating and preparation method thereof |
| CN112745734A (en) * | 2020-12-15 | 2021-05-04 | 宁波格林斯粉末涂装有限公司 | Open fire resistant barbecue powder coating |
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