A high-brightness luminous thermosetting powder coating and preparation method thereof

Abstract

The present application relates to the field of powder coating technology, specifically a high-brightness luminous thermosetting powder coating and its preparation method, comprising the following raw materials in parts by weight: 20-30 parts of glycidyl acrylate modified polycarbonate, 15-25 parts of hydrogenated bisphenol A epoxy resin, 15-25 parts of tetraphenol ethane epoxy resin, 2-5 parts of curing agent, 1-2 parts of transmittance enhancer, 1-3 parts of auxiliary agent, 6-10 parts of phosphor, and 0.5-1 parts of antioxidant; the auxiliary agent includes a dispersant and an anti-settling agent in a weight ratio of (1-3):1; the preparation method comprises the steps of mixing, stirring, and grinding the raw materials. By combining the specific raw materials, the powder coating prepared in the present application not only improves the brightness of the luminous thermosetting powder coating, but also has good mechanical strength and yellowing resistance, and its long-term performance is not affected.

Description

Technical Field

[0001] The present application relates to the technical field of powder coatings, and in particular to a high-brightness luminous thermosetting powder coating and a preparation method thereof. Background Art

[0002] Thermosetting powder coatings use thermosetting resins as film-forming materials, with the addition of a cross-linking curing agent. Upon heating, they form a hard, insoluble, and infusible coating. Coatings formed from thermosetting powder coatings have excellent corrosion resistance, good flexibility, and are resistant to external impact and collision. Furthermore, because they do not use solvents, thermosetting powder coatings do not produce harmful gases or wastewater during the construction and curing process, leaving no pollution to the environment. They can be used for coating the exteriors of household appliances such as refrigerators, air conditioners, and vehicle frames; for coating the surfaces of indoor machinery and equipment such as radiators, supermarket shelves, and steel craft furniture; and for decorative coatings of outdoor products such as aluminum profiles, security doors, auto parts, highway guardrails, and agricultural and engineering machinery.

[0003] Luminous thermosetting powder coatings have the advantages of thermosetting powder coatings and have a special luminous effect. They are used in various occasions that require night-time identification or decoration, such as road signs, safety exit signs, toys, crafts, billboards, etc.

[0004] However, existing luminous thermosetting powder coatings still have some problems. Due to the limitation of raw material selection, the luminous brightness is low and cannot effectively provide lighting indication. At the same time, the afterglow time is short and cannot meet the needs of continuous lighting indication. Summary of the Invention

[0005] The present application aims to overcome at least one of the defects of the prior art and provide a high-brightness luminous thermosetting powder coating and a preparation method thereof. By combining specific raw materials, the prepared powder coating can not only improve the brightness of the luminous thermosetting powder coating, but also has good mechanical strength and yellowing resistance, and the long-term use performance is not affected.

[0006] In a first aspect, the present invention provides a high-brightness luminous thermosetting powder coating, which is achieved through the following technical solutions:

[0007] A high-brightness luminous thermosetting powder coating comprises the following raw materials in parts by weight:

[0008] 20-30 parts of glycidyl acrylate modified polycarbonate, 15-25 parts of hydrogenated bisphenol A epoxy resin, 15-25 parts of tetraphenol ethane tetraglycidyl ether epoxy resin, 2-5 parts of curing agent, 1-2 parts of transmittance enhancer, 1-3 parts of auxiliary agent, 6-10 parts of phosphor, and 0.5-1 part of antioxidant.

[0009] The high-brightness luminous thermosetting powder coating according to the embodiment of the present application has at least the following beneficial effects:

[0010] The glycidyl acrylate modified polycarbonate, hydrogenated bisphenol A epoxy resin and tetraphenol ethane epoxy resin of the present application have relatively high transparency purity. The light emitted by the powder coating can more easily penetrate the coating, thereby enhancing the brightness at night. At the same time, it has excellent weather resistance, heat resistance and corrosion resistance. The coating film formed after curing also has a high cross-linking density and hardness, thereby meeting the high requirements of thermosetting powder coatings for resin performance.

[0011] Glycidyl acrylate contains double bonds and epoxy groups. Glycidyl acrylate modified polycarbonate can make up for the shortcomings of polycarbonate in weather resistance, fatigue resistance and wear resistance, improve the hardness of the coating, make the coating more wear-resistant and scratch-resistant, and also improve the gloss of the coating, making the coating brighter and more beautiful, improving weather resistance, and not easily yellowing or discoloring after long-term use, thereby maintaining the stability of the luminous properties.

[0012] Bisphenol A epoxy resin contains a large number of benzene rings and has poor weather resistance. Hydrogenated bisphenol A epoxy resin not only has the advantages of bisphenol A epoxy resin, but also has excellent weather resistance and improves the physical and mechanical properties of the coating. Tetraphenylethane tetraglycidyl ether epoxy resin contains four epoxy groups and has high functionality. After curing, the crosslink density of the coating is high, which improves the corrosion resistance and temperature resistance of the coating.

[0013] The present application reduces the proportion of auxiliary powder and increases the proportion of fluorescent powder, which can further improve the transparency of the powder coating and thus enhance the brightness at night.

[0014] Adding a transmittance enhancer to this application can further improve the transparency of the powder coating, thereby enhancing nighttime brightness.

[0015] According to some embodiments of the present application, the additive includes a dispersant. Poor dispersibility can affect the uniform distribution of the phosphor, resulting in uneven luminescence on the coating surface. Dispersants can improve the dispersion coefficient of the powder coating, making the distribution of the phosphor and other raw materials such as antioxidants and transmittance enhancers more uniform. Together, they enhance the brightness and antioxidant properties of the high-brightness luminous thermosetting powder coating.

[0016] According to some embodiments of the present application, the preparation of the glycidyl acrylate modified polycarbonate includes the following steps: dissolving 0.5-2 parts by weight of β-diimine nickel catalyst in 25-30 parts by weight of glycidyl acrylate to obtain a mixture and transferring it to a high-pressure reactor; introducing carbon dioxide gas into the high-pressure reactor to control the reactor pressure at 0.5-4 MPa; reacting at 25°C for 8-12 hours, dissolving the above mixture in a toluene solution, heating to 80°C, and adding 3-4 parts by weight of 2,4-diphenyl-4-methyl-1-pentene; introducing nitrogen into the above solution, controlling the reactor pressure to normal pressure, and continuing the reaction at 80°C for 10-24 hours; adding the above reactants to an ethanol solution, washing and filtering twice, and then drying in a vacuum oven for 24 hours to obtain the glycidyl acrylate modified polycarbonate.

[0017] Furthermore, the dispersant includes carbamate and polycarboxylate. Carbamate can help maintain and enhance the dispersion state of powder in powder coatings, has excellent dispersibility and anti-precipitation properties, and can achieve good dispersion effects at very low dosages. It can also improve the wettability of the powder, thereby improving the adhesion and durability of the coating film. Polycarboxylate has excellent dispersibility and stability, can achieve good dispersion effects at low concentrations, and can effectively reduce the viscosity and stickiness of the coating film and improve the leveling of the coating film. The combination of the two can enhance the luminous properties of the powder coating.

[0018] According to some embodiments of the present application, the auxiliary agent further includes an anti-settling agent. The addition of the anti-settling agent can reduce the sinking of the powder, maintain the uniformity of the powder distribution, and improve the light transmittance of the powder coating.

[0019] Furthermore, the average particle size of the anti-settling agent is 50-100 nm. Selecting an anti-settling agent with a small particle size and uniform distribution can reduce the scattering and absorption of light and improve the luminous brightness of the powder coating.

[0020] Furthermore, the anti-settling agent is a mixture of organic bentonite and polyamide wax.

[0021] Furthermore, the weight ratio of the dispersant to the anti-settling agent is (1-3):1. For example, the weight ratio of the dispersant to the anti-settling agent is 2:1.

[0022] According to some embodiments of the present application, the preparation of the phosphor comprises the following steps:

[0023] S1. According to the chemical formula Sr 2.6 La 1.3 (PO4) 2.7 (SiO4) 0.3 :0.1Eu in the stoichiometric, will contain Sr 2+Compounds containing La 3+ Compounds, phosphate compounds, Si-containing 4+ The compound and the Eu-containing compound are mixed uniformly in an organic solvent, and the mixture is ground for 40 minutes to obtain a precursor;

[0024] S2. The precursor is preheated at 150-200 ° C for 1-1.5 hours to obtain a dry powder;

[0025] S3. The dried powder is sintered in a reducing atmosphere at 1000-1200° C. for 4-5 hours to obtain a phosphor.

[0026] At a higher preheating temperature, the precursor can be pre-sintered, and the relative humidity of the air in the preheating box decreases, which helps to absorb the organic solvent in the precursor and reduce the particle agglomeration caused by the surface tension of the organic solvent inside the precursor, thereby continuously reducing the particle size, reducing the particle size of the phosphor, and making the phosphor more dispersed, thereby improving the luminous efficiency of the phosphor; pre-sintering gradually destroys the lattice, and the prepared phosphor single crystal structure is purer, the powder particle size is smaller, the particle size is more uniform, the excitation and emission fluorescence intensity is higher, and the luminous efficiency of the phosphor can be improved.

[0027] Furthermore, the reducing atmosphere is a mixture of H2 and Ne, and the molar percentage of H2 in the mixture is 5%;

[0028] According to some embodiments of the present application, the curing agent includes a hydroxyalkylamide curing agent and a blocked isocyanate curing agent.

[0029] Furthermore, the weight ratio of the hydroxyalkylamide curing agent to the blocked isocyanate curing agent is (1-2):1.

[0030] According to some embodiments of the present application, the transmittance enhancer includes nano-silica, isopropyltriethoxysilane, and fluoroacrylate. The fixed combination of transmittance enhancers can change the refractive index and transmittance of the synthetic resin, making it easier for light to pass through the resin and improving the brightness of the powder coating.

[0031] Furthermore, the nano-silica, isopropyltriethoxysilane and fluoroacrylate are used in a weight ratio of (1-2):1:1.

[0032] According to some embodiments of the present application, the antioxidant is selected from at least one of 2,6-di-tert-butyl-p-cresol, tert-butylhydroquinone, butylated hydroxyanisole, hydroquinone, or o-methylhydroquinone. The antioxidant in the present application can increase the shelf life of the high-brightness luminous thermosetting powder coating, maintain the activity of the groups in the coating, and enhance the coating's curing effect.

[0033] In a second aspect, the present invention provides a method for preparing the high-brightness luminous thermosetting powder coating, which is achieved through the following technical solutions:

[0034] The preparation method of the high-brightness luminous thermosetting powder coating comprises the following steps:

[0035] (1) placing glycidyl acrylate modified polycarbonate, hydrogenated bisphenol A epoxy resin, tetraphenol ethane tetraglycidyl ether epoxy resin, and a curing agent in parts by weight into a curing oven and curing for 16-20 minutes at a curing temperature of 220-250° C. to obtain a synthetic resin;

[0036] (2) Adding the auxiliary agent and the permeation enhancer into the reaction kettle and stirring for 3-4 minutes at a stirring temperature of 15-25° C. to obtain a mixture A;

[0037] (3) adding the synthetic resin and mixture A into a reaction kettle and stirring for 8-10 minutes at a stirring temperature of 130-150° C. to obtain mixture B;

[0038] (4) adding the phosphor and antioxidant to the mixture B respectively and stirring for 5-6 minutes at a stirring temperature of 90-100° C. to obtain a mixture C;

[0039] (5) The mixture C is melt-extruded and mixed, and the extrudate is cooled, crushed, and ground into a powder of 20-25 μm to obtain a high-brightness luminous thermosetting powder coating.

[0040] The method for preparing the high-brightness luminous thermosetting powder coating according to the embodiment of the present application has at least the following beneficial effects:

[0041] The preparation method of the present application has simple steps, does not require the use of complex production equipment, has low cost, is pollution-free during the manufacturing process, does not emit toxic substances, does not harm the health of operators, and is suitable for industrial production.

[0042] According to some embodiments of the present application, the grinding in step (5) includes a first grinding and a second grinding.

[0043] Furthermore, the first grinding is performed by grinding with a bead mill.

[0044] Furthermore, the second grinding is performed by a three-roll mill.

[0045] Furthermore, vacuum degassing and stirring are further performed after the first grinding.

[0046] Furthermore, the vacuum degassing and stirring time is 10-30 minutes. DETAILED DESCRIPTION

[0047] To make the purpose, technical solutions and advantages of this application more clear, the following will be further described in detail with reference to specific embodiments. The embodiments described here are only part of the embodiments of this application and should not be understood as limiting the scope of protection of this application.

[0048] Example 1

[0049] Preparation of high-brightness luminous thermosetting powder coating: The raw materials are selected by weight: 25 parts of glycidyl acrylate modified polycarbonate, 20 parts of hydrogenated bisphenol A epoxy resin, 20 parts of tetraphenol ethane tetraglycidyl ether epoxy resin, 4 parts of curing agent, 1.5 parts of anti-permeability agent, 2 parts of auxiliary agent, 8 parts of phosphor, and 0.8 parts of antioxidant; wherein the auxiliary agent includes a dispersant and an anti-settling agent in a weight ratio of 2:1, the dispersant includes urethane and polycarboxylate ether, the anti-settling agent is a mixture of organic bentonite with an average particle size of 50-100 nm and polyamide wax, the curing agent is composed of a hydroxyalkylamide curing agent and a blocked isocyanate curing agent in a weight ratio of 1.5:1, the anti-permeability agent is composed of nano-silica, isopropyltriethoxysilane and fluoroacrylate in a weight ratio of 1.5:1:1, and the antioxidant is a mixture of 2,6-di-tert-butyl-p-cresol and butylated hydroxyanisole;

[0050] (1) placing glycidyl acrylate modified polycarbonate, hydrogenated bisphenol A epoxy resin, tetraphenol ethane tetraglycidyl ether epoxy resin, and a curing agent in parts by weight into a curing oven and curing for 18 minutes at a curing temperature of 235° C. to obtain a synthetic resin;

[0051] (2) Add the auxiliary agent and the permeation enhancer into the reaction kettle and stir for 3.5 minutes at a stirring temperature of 20° C. to obtain a mixture A;

[0052] (3) Adding the synthetic resin and mixture A into a reaction kettle and stirring for 9 minutes at a stirring temperature of 140° C. to obtain mixture B;

[0053] (4) adding the phosphor and antioxidant to the mixture B and stirring for 5.5 minutes at a temperature of 95° C. to obtain a mixture C;

[0054] (5) subjecting the mixture C to a melt-extrusion mixing process, cooling and crushing the extrudate, and grinding it into a powder of 20-25 μm to obtain a high-brightness luminous thermosetting powder coating; wherein the grinding includes a first grinding and a second grinding, wherein the first grinding is performed by a bead mill and the second grinding is performed by a three-roll mill, and after the first grinding, vacuum degassing and stirring for 20 minutes are also performed;

[0055] The preparation method of glycidyl acrylate modified polycarbonate comprises the following steps: dissolving 1 part by weight of β-diimine nickel catalyst in 27 parts by weight of glycidyl acrylate to obtain a mixture, and transferring the mixture into an autoclave; introducing carbon dioxide gas into the autoclave, and controlling the pressure of the autoclave to be 0.5-4 MPa; reacting at 25° C. for 10 hours, dissolving the mixture in a toluene solution, heating the solution to 80° C., and adding 3.5 parts by weight of 2,4-diphenyl-4-methyl-1-pentene; introducing nitrogen into the solution, controlling the pressure of the autoclave to be atmospheric pressure, and continuing the reaction at 80° C. for 18 hours; adding the reactants into an ethanol solution, washing and filtering the solution twice, and drying the solution in a vacuum oven for 24 hours to obtain the glycidyl acrylate modified polycarbonate;

[0056] The preparation of phosphor includes the following steps:

[0057] S1. According to the chemical formula Sr 2.6 La 1.3 (PO4) 2.7 (SiO4) 0.3 : The stoichiometric amount in 0.1Eu was 0.576g SrCO3, 0.318g La2O3, 0.535g (NH4)2HPO4, 0.027g SiO2, and 0.026g Eu2O3 were mixed in anhydrous ethanol, and the mixture was ground for 40 minutes to obtain a precursor;

[0058] S2. The precursor was preheated at 180 ° C for 1.3 hours to obtain a dry powder;

[0059] S3. The dried powder was sintered at 1100° C. for 4.5 hours in a reducing atmosphere obtained by mixing H 2 and Ne in a molar ratio of 1:19 to obtain a phosphor.

[0060] Example 2

[0061] Preparation of high-brightness luminous thermosetting powder coating: raw materials are selected by weight: 30 parts of acrylate modified polycarbonate, 15 parts of hydrogenated bisphenol A epoxy resin, 25 parts of tetraphenol ethane tetraglycidyl ether epoxy resin, 2 parts of curing agent, 2 parts of transmittance enhancer, 1 part of auxiliary agent, 10 parts of phosphor, and 0.5 parts of antioxidant; wherein the auxiliary agent includes a dispersant and an anti-settling agent in a weight ratio of 3:1, the dispersant includes urethane and polycarboxylate ether, the anti-settling agent is a mixture of organic bentonite with an average particle size of 50-100 nm and polyamide wax, the curing agent is composed of a hydroxyalkylamide curing agent and a blocked isocyanate curing agent in a weight ratio of 1:1, the transmittance enhancer is composed of nano-silica, isopropyltriethoxysilane and fluoroacrylate in a weight ratio of 2:1:1, and the antioxidant is tert-butylhydroquinone;

[0062] (1) placing glycidyl acrylate modified polycarbonate, hydrogenated bisphenol A epoxy resin, tetraphenol ethane tetraglycidyl ether epoxy resin, and a curing agent in parts by weight into a curing oven and curing for 16 minutes at a curing temperature of 250° C. to obtain a synthetic resin;

[0063] (2) Add the auxiliary agent and the permeation enhancer into the reaction kettle and stir for 3 minutes at a stirring temperature of 25° C. to obtain a mixture A;

[0064] (3) Adding the synthetic resin and mixture A into a reaction kettle and stirring for 8 minutes at a stirring temperature of 150° C. to obtain mixture B;

[0065] (4) adding the phosphor and the antioxidant to the mixture B respectively and stirring for 5 minutes at a stirring temperature of 100° C. to obtain a mixture C;

[0066] (5) subjecting the mixture C to a melt-extrusion mixing process, cooling and crushing the extrudate, and grinding it into a powder of 20-25 μm to obtain a high-brightness luminous thermosetting powder coating; wherein the grinding includes a first grinding and a second grinding, wherein the first grinding is performed by a bead mill and the second grinding is performed by a three-roll mill, and after the first grinding, vacuum degassing and stirring for 30 minutes are also performed;

[0067] The preparation method of glycidyl acrylate modified polycarbonate comprises the following steps: dissolving 0.5 parts by weight of β-diimine nickel catalyst in 30 parts by weight of glycidyl acrylate to obtain a mixture, and transferring the mixture into an autoclave; introducing carbon dioxide gas into the autoclave, and controlling the pressure of the autoclave to be 0.5-4 MPa; reacting at 25° C. for 8 hours, dissolving the mixture in a toluene solution, heating the solution to 80° C., and adding 4 parts by weight of 2,4-diphenyl-4-methyl-1-pentene; introducing nitrogen into the solution, controlling the pressure of the autoclave to be atmospheric pressure, and continuing the reaction at 80° C. for 10 hours; adding the reactants into an ethanol solution, washing and filtering the solution twice, and drying the solution in a vacuum oven for 24 hours to obtain the glycidyl acrylate modified polycarbonate;

[0068] The preparation of phosphor includes the following steps:

[0069] S1. According to the chemical formula Sr 2.6 La 1.3 (PO4) 2.7 (SiO4) 0.3 : The stoichiometric amount in 0.1Eu was 0.576g SrCO3, 0.318g La2O3, 0.535g (NH4)2HPO4, 0.027g SiO2, and 0.026g Eu2O3 were mixed in anhydrous ethanol, and the mixture was ground for 40 minutes to obtain a precursor;

[0070] S2. The precursor was preheated at 200°C for 1 hour to obtain a dry powder;

[0071] S3. The dried powder was sintered at 1200° C. for 4 hours in a reducing atmosphere obtained by mixing H 2 and Ne in a molar ratio of 1:19 to obtain a phosphor.

[0072] Example 3

[0073] Preparation of high-brightness luminous thermosetting powder coating: raw materials are selected by weight: 20 parts of acrylate glycidyl ester modified polycarbonate, 25 parts of hydrogenated bisphenol A epoxy resin, 15 parts of tetraphenol ethane tetraglycidyl ether epoxy resin, 5 parts of curing agent, 1 part of anti-permeability agent, 3 parts of auxiliary agent, 6 parts of phosphor, and 1 part of antioxidant; wherein the auxiliary agent includes a dispersant and an anti-settling agent in a weight ratio of 1:1, the dispersant includes urethane and polycarboxylate ether, the anti-settling agent is a mixture of organic bentonite with an average particle size of 50-100 nm and polyamide wax, the curing agent is composed of a hydroxyalkylamide curing agent and a blocked isocyanate curing agent in a weight ratio of 2:1, the anti-permeability agent is composed of nano-silica, isopropyltriethoxysilane and fluoroacrylate in a weight ratio of 1:1:1, and the antioxidant is o-methylhydroquinone;

[0074] (1) placing glycidyl acrylate modified polycarbonate, hydrogenated bisphenol A epoxy resin, tetraphenol ethane tetraglycidyl ether epoxy resin, and a curing agent in parts by weight into a curing oven and curing for 20 minutes at a curing temperature of 220° C. to obtain a synthetic resin;

[0075] (2) Add the auxiliary agent and the permeation enhancer into the reaction kettle and stir for 4 minutes at a stirring temperature of 15° C. to obtain a mixture A;

[0076] (3) Adding the synthetic resin and mixture A into a reaction kettle and stirring for 10 minutes at a stirring temperature of 130° C. to obtain mixture B;

[0077] (4) adding the phosphor and antioxidant to the mixture B and stirring for 6 minutes at a temperature of 90° C. to obtain a mixture C;

[0078] (5) subjecting the mixture C to a melt-extrusion mixing process, cooling and crushing the extrudate, and grinding it into a powder of 20-25 μm to obtain a high-brightness luminous thermosetting powder coating; wherein the grinding includes a first grinding and a second grinding, wherein the first grinding is performed by a bead mill and the second grinding is performed by a three-roll mill, and after the first grinding, vacuum degassing and stirring for 10 minutes are also performed;

[0079] The preparation method of glycidyl acrylate modified polycarbonate comprises the following steps: dissolving 2 parts by weight of a β-diimine nickel catalyst in 25 parts by weight of glycidyl acrylate to obtain a mixture, and transferring the mixture into an autoclave; introducing carbon dioxide gas into the autoclave to control the pressure of the autoclave at 0.5-4 MPa; reacting at 25° C. for 12 hours, dissolving the mixture in a toluene solution, heating the solution to 80° C., and adding 3 parts by weight of 2,4-diphenyl-4-methyl-1-pentene; introducing nitrogen into the solution to control the pressure of the autoclave to atmospheric pressure, and continuing the reaction at 80° C. for 24 hours; adding the reactants into an ethanol solution, washing and filtering the solution twice, and drying the solution in a vacuum oven for 24 hours to obtain the glycidyl acrylate modified polycarbonate;

[0080] The preparation of phosphor includes the following steps:

[0081] S1. According to the chemical formula Sr 2.6 La 1.3 (PO4) 2.7 (SiO4) 0.3 : The stoichiometric amount in 0.1Eu was 0.576g SrCO3, 0.318g La2O3, 0.535g (NH4)2HPO4, 0.027g SiO2, and 0.026g Eu2O3 were mixed in anhydrous ethanol, and the mixture was ground for 40 minutes to obtain a precursor;

[0082] S2. The precursor was preheated at 150 ° C for 1.5 hours to obtain a dry powder;

[0083] S3. The dried powder was sintered at 1000° C. for 5 hours in a reducing atmosphere obtained by mixing H 2 and Ne in a molar ratio of 1:19 to obtain a phosphor.

[0084] Example 4

[0085] Preparation of high-brightness luminous thermosetting powder coating: The raw materials are selected by weight: 28 parts of acrylate glycidyl modified polycarbonate, 21 parts of hydrogenated bisphenol A epoxy resin, 20 parts of tetraphenol ethane tetraglycidyl ether epoxy resin, 3 parts of curing agent, 1 part of anti-permeability agent, 2 parts of auxiliary agent, 8 parts of phosphor, and 0.7 parts of antioxidant; wherein the auxiliary agent includes a dispersant and an anti-settling agent in a weight ratio of 2.5:1, the dispersant includes urethane and polycarboxylate ether, the anti-settling agent is a mixture of organic bentonite with an average particle size of 50-100 nm and polyamide wax, the curing agent is composed of a hydroxyalkylamide curing agent and a blocked isocyanate curing agent in a weight ratio of 1.8:1, the anti-permeability agent is composed of nano-silica, isopropyltriethoxysilane and fluoroacrylate in a weight ratio of 1.6:1:1, and the antioxidant is a mixture of tert-butylhydroquinone and butylated hydroxyanisole;

[0086] (1) placing glycidyl acrylate modified polycarbonate, hydrogenated bisphenol A epoxy resin, tetraphenol ethane tetraglycidyl ether epoxy resin, and a curing agent in parts by weight into a curing oven and curing for 18 minutes at a curing temperature of 230° C. to obtain a synthetic resin;

[0087] (2) Add the auxiliary agent and the permeation enhancer into the reaction kettle and stir for 4 minutes at a stirring temperature of 20° C. to obtain a mixture A;

[0088] (3) Adding the synthetic resin and mixture A into a reaction kettle and stirring for 9 minutes at a stirring temperature of 140° C. to obtain mixture B;

[0089] (4) adding the phosphor and the antioxidant to the mixture B respectively and stirring for 5 minutes at a stirring temperature of 100° C. to obtain a mixture C;

[0090] (5) subjecting the mixture C to a melt-extrusion mixing process, cooling and crushing the extrudate, and grinding it into a powder of 20-25 μm to obtain a high-brightness luminous thermosetting powder coating; wherein the grinding includes a first grinding and a second grinding, wherein the first grinding is performed by a bead mill and the second grinding is performed by a three-roll mill, and after the first grinding, vacuum degassing and stirring for 20 minutes are also performed;

[0091] The preparation method of glycidyl acrylate modified polycarbonate comprises the following steps: dissolving 1.6 parts by weight of a β-diimine nickel catalyst in 27 parts by weight of glycidyl acrylate to obtain a mixture, and transferring the mixture into an autoclave; introducing carbon dioxide gas into the autoclave to control the pressure of the autoclave at 0.5-4 MPa; reacting at 25° C. for 10 hours, dissolving the mixture in a toluene solution, heating the solution to 80° C., and adding 4 parts by weight of 2,4-diphenyl-4-methyl-1-pentene; introducing nitrogen into the solution to control the pressure of the autoclave to atmospheric pressure, and continuing the reaction at 80° C. for 20 hours; adding the reactants into an ethanol solution, washing and filtering the solution twice, and drying the solution in a vacuum oven for 24 hours to obtain the glycidyl acrylate modified polycarbonate;

[0092] The preparation of phosphor includes the following steps:

[0093] S1. According to the chemical formula Sr 2.6 La 1.3 (PO4) 2.7 (SiO4) 0.3 : The stoichiometric amount in 0.1Eu was 0.576g SrCO3, 0.318g La2O3, 0.535g (NH4)2HPO4, 0.027g SiO2, and 0.026g Eu2O3 were mixed in anhydrous ethanol, and the mixture was ground for 40 minutes to obtain a precursor;

[0094] S2. The precursor was preheated at 170 ° C for 1.3 hours to obtain a dry powder;

[0095] S3. The dried powder was sintered at 1100° C. for 4 hours in a reducing atmosphere obtained by mixing H 2 and Ne in a molar ratio of 1:19 to obtain a phosphor.

[0096] Comparative Example 1

[0097] Preparation of high-brightness luminous thermosetting powder coating: The raw materials are selected by weight: 25 parts of polycarbonate, 20 parts of hydrogenated bisphenol A epoxy resin, 20 parts of tetraphenol ethane tetraglycidyl ether epoxy resin, 4 parts of curing agent, 1.5 parts of anti-permeability agent, 2 parts of auxiliary agent, 8 parts of phosphor, and 0.8 parts of antioxidant; wherein the auxiliary agent includes a dispersant and an anti-settling agent in a weight ratio of 2:1, the dispersant includes urethane and polycarboxylate ether, the anti-settling agent is a mixture of organic bentonite with an average particle size of 50-100 nm and polyamide wax, the curing agent is composed of a hydroxyalkylamide curing agent and a blocked isocyanate curing agent in a weight ratio of 1.5:1, the anti-permeability agent is composed of nano-silica, isopropyltriethoxysilane and fluoroacrylate in a weight ratio of 1.5:1:1, and the antioxidant is a mixture of 2,6-di-tert-butyl-p-cresol and butylated hydroxyanisole;

[0098] (1) placing polycarbonate, hydrogenated bisphenol A epoxy resin, tetraphenol ethane tetraglycidyl ether epoxy resin, and a curing agent in parts by weight into a curing oven and curing for 18 minutes at a curing temperature of 235° C. to obtain a synthetic resin;

[0099] (2) Add the auxiliary agent and the permeation enhancer into the reaction kettle and stir for 3.5 minutes at a stirring temperature of 20° C. to obtain a mixture A;

[0100] (3) Adding the synthetic resin and mixture A into a reaction kettle and stirring for 9 minutes at a stirring temperature of 140° C. to obtain mixture B;

[0101] (4) adding the phosphor and antioxidant to the mixture B and stirring for 5.5 minutes at a temperature of 95° C. to obtain a mixture C;

[0102] (5) subjecting the mixture C to a melt-extrusion mixing process, cooling and crushing the extrudate, and grinding it into a powder of 20-25 μm to obtain a high-brightness luminous thermosetting powder coating; wherein the grinding includes a first grinding and a second grinding, wherein the first grinding is performed by a bead mill and the second grinding is performed by a three-roll mill, and after the first grinding, vacuum degassing and stirring for 20 minutes are also performed;

[0103] The preparation of the phosphor includes the following steps:

[0104] S1. According to the chemical formula Sr2.6 La 1.3 (PO4) 2.7 (SiO4) 0.3 : The stoichiometric amount in 0.1Eu was 0.576g SrCO3, 0.318g La2O3, 0.535g (NH4)2HPO4, 0.027g SiO2, and 0.026g Eu2O3 were mixed in anhydrous ethanol, and the mixture was ground for 40 minutes to obtain a precursor;

[0105] S2. The precursor was preheated at 180 ° C for 1.3 hours to obtain a dry powder;

[0106] S3. The dried powder was sintered at 1100° C. for 4.5 hours in a reducing atmosphere obtained by mixing H 2 and Ne in a molar ratio of 1:19 to obtain a phosphor.

[0107] Comparative Example 2

[0108] Preparation of high-brightness luminous thermosetting powder coating: The raw materials are selected by weight: 25 parts of glycidyl acrylate modified polycarbonate, 20 parts of hydrogenated bisphenol A epoxy resin, 20 parts of tetraphenol ethane tetraglycidyl ether epoxy resin, 4 parts of curing agent, 1.5 parts of anti-permeability agent, 2 parts of auxiliary agent, 8 parts of phosphor, and 0.8 parts of antioxidant; wherein the auxiliary agent includes a dispersant and an anti-settling agent in a weight ratio of 2:1, the dispersant includes urethane and polycarboxylate ether, the anti-settling agent is an organic bentonite with an average particle size of 50-100 nm, the curing agent is composed of a hydroxyalkylamide curing agent and a blocked isocyanate curing agent in a weight ratio of 1.5:1, the anti-permeability agent is composed of nano-silica, isopropyltriethoxysilane and fluoroacrylate in a weight ratio of 1.5:1:1, and the antioxidant is a mixture of 2,6-di-tert-butyl-p-cresol and butylated hydroxyanisole;

[0109] (1) placing glycidyl acrylate modified polycarbonate, hydrogenated bisphenol A epoxy resin, tetraphenol ethane tetraglycidyl ether epoxy resin, and a curing agent in parts by weight into a curing oven and curing for 18 minutes at a curing temperature of 235° C. to obtain a synthetic resin;

[0110] (2) Add the auxiliary agent and the permeation enhancer into the reaction kettle and stir for 3.5 minutes at a stirring temperature of 20° C. to obtain a mixture A;

[0111] (3) Adding the synthetic resin and mixture A into a reaction kettle and stirring for 9 minutes at a stirring temperature of 140° C. to obtain mixture B;

[0112] (4) adding the phosphor and antioxidant to the mixture B and stirring for 5.5 minutes at a temperature of 95° C. to obtain a mixture C;

[0113] (5) subjecting the mixture C to a melt-extrusion mixing process, cooling and crushing the extrudate, and grinding it into a powder of 20-25 μm to obtain a high-brightness luminous thermosetting powder coating; wherein the grinding includes a first grinding and a second grinding, wherein the first grinding is performed by a bead mill and the second grinding is performed by a three-roll mill, and after the first grinding, vacuum degassing and stirring for 20 minutes are also performed;

[0114] The preparation method of glycidyl acrylate modified polycarbonate comprises the following steps: dissolving 1 part by weight of β-diimine nickel catalyst in 27 parts by weight of glycidyl acrylate to obtain a mixture, and transferring the mixture into an autoclave; introducing carbon dioxide gas into the autoclave, and controlling the pressure of the autoclave to be 0.5-4 MPa; reacting at 25° C. for 10 hours, dissolving the mixture in a toluene solution, heating the solution to 80° C., and adding 3.5 parts by weight of 2,4-diphenyl-4-methyl-1-pentene; introducing nitrogen into the solution, controlling the pressure of the autoclave to be atmospheric pressure, and continuing the reaction at 80° C. for 18 hours; adding the reactants into an ethanol solution, washing and filtering the solution twice, and drying the solution in a vacuum oven for 24 hours to obtain the glycidyl acrylate modified polycarbonate;

[0115] The preparation of phosphor includes the following steps:

[0116] S1. According to the chemical formula Sr 2.6 La 1.3 (PO4) 2.7 (SiO4) 0.3 : The stoichiometric amount in 0.1Eu was 0.576g SrCO3, 0.318g La2O3, 0.535g (NH4)2HPO4, 0.027g SiO2, and 0.026g Eu2O3 were mixed in anhydrous ethanol, and the mixture was ground for 40 minutes to obtain a precursor;

[0117] S2. The precursor was preheated at 180 ° C for 1.3 hours to obtain a dry powder;

[0118] S3. The dried powder was sintered at 1100° C. for 4.5 hours in a reducing atmosphere obtained by mixing H 2 and Ne in a molar ratio of 1:19 to obtain a phosphor.

[0119] Comparative Example 3

[0120] Preparation of high-brightness luminous thermosetting powder coating: The raw materials are selected by weight: 25 parts of glycidyl acrylate modified polycarbonate, 20 parts of hydrogenated bisphenol A epoxy resin, 20 parts of tetraphenol ethane tetraglycidyl ether epoxy resin, 4 parts of curing agent, 1.5 parts of transmittance enhancer, 2 parts of auxiliary agent, 8 parts of phosphor, and 0.8 parts of antioxidant; wherein the auxiliary agent includes a dispersant and an anti-settling agent in a weight ratio of 2:1, the dispersant includes carbamate and polycarboxylate ether, the anti-settling agent is a mixture of organic bentonite with an average particle size of 50-100 nm and polyamide wax, the curing agent is composed of a hydroxyalkylamide curing agent and a blocked isocyanate curing agent in a weight ratio of 1.5:1, the transmittance enhancer is nano-silica, and the antioxidant is a mixture of 2,6-di-tert-butyl-p-cresol and butylated hydroxyanisole;

[0121] (1) placing glycidyl acrylate modified polycarbonate, hydrogenated bisphenol A epoxy resin, tetraphenol ethane tetraglycidyl ether epoxy resin, and a curing agent in parts by weight into a curing oven and curing for 18 minutes at a curing temperature of 235° C. to obtain a synthetic resin;

[0122] (2) Add the auxiliary agent and the permeation enhancer into the reaction kettle and stir for 3.5 minutes at a stirring temperature of 20° C. to obtain a mixture A;

[0123] (3) Adding the synthetic resin and mixture A into a reaction kettle and stirring for 9 minutes at a stirring temperature of 140° C. to obtain mixture B;

[0124] (4) adding the phosphor and antioxidant to the mixture B and stirring for 5.5 minutes at a temperature of 95° C. to obtain a mixture C;

[0125] (5) subjecting the mixture C to a melt-extrusion mixing process, cooling and crushing the extrudate, and grinding it into a powder of 20-25 μm to obtain a high-brightness luminous thermosetting powder coating; wherein the grinding includes a first grinding and a second grinding, wherein the first grinding is performed by a bead mill and the second grinding is performed by a three-roll mill, and after the first grinding, vacuum degassing and stirring for 20 minutes are also performed;

[0126] The preparation method of glycidyl acrylate modified polycarbonate comprises the following steps: dissolving 1 part by weight of β-diimine nickel catalyst in 27 parts by weight of glycidyl acrylate to obtain a mixture, and transferring the mixture into an autoclave; introducing carbon dioxide gas into the autoclave, and controlling the pressure of the autoclave to be 0.5-4 MPa; reacting at 25° C. for 10 hours, dissolving the mixture in a toluene solution, heating the solution to 80° C., and adding 3.5 parts by weight of 2,4-diphenyl-4-methyl-1-pentene; introducing nitrogen into the solution, controlling the pressure of the autoclave to be atmospheric pressure, and continuing the reaction at 80° C. for 18 hours; adding the reactants into an ethanol solution, washing and filtering the solution twice, and drying the solution in a vacuum oven for 24 hours to obtain the glycidyl acrylate modified polycarbonate;

[0127] The preparation of phosphor includes the following steps:

[0128] S1. According to the chemical formula Sr 2.6 La 1.3 (PO4) 2.7 (SiO4) 0.3 : The stoichiometric amount in 0.1Eu was 0.576g SrCO3, 0.318g La2O3, 0.535g (NH4)2HPO4, 0.027g SiO2, and 0.026g Eu2O3 were mixed in anhydrous ethanol, and the mixture was ground for 40 minutes to obtain a precursor;

[0129] S2. The precursor was preheated at 180 ° C for 1.3 hours to obtain a dry powder;

[0130] S3. The dried powder was sintered at 1100° C. for 4.5 hours in a reducing atmosphere obtained by mixing H 2 and Ne in a molar ratio of 1:19 to obtain a phosphor.

[0131] Comparative Example 4

[0132] Preparation of high-brightness luminous thermosetting powder coating: The raw materials are selected by weight: 25 parts of glycidyl acrylate modified polycarbonate, 20 parts of hydrogenated bisphenol A epoxy resin, 20 parts of tetraphenol ethane tetraglycidyl ether epoxy resin, 4 parts of curing agent, 1.5 parts of anti-permeability agent, 2 parts of auxiliary agent, and 8 parts of phosphor; wherein the auxiliary agent includes a dispersant and an anti-settling agent in a weight ratio of 2:1, the dispersant includes urethane and polycarboxylate ether, the anti-settling agent is a mixture of organic bentonite with an average particle size of 50-100 nm and polyamide wax, the curing agent is composed of a hydroxyalkylamide curing agent and a blocked isocyanate curing agent in a weight ratio of 1.5:1, and the anti-permeability agent is composed of nano-silica, isopropyltriethoxysilane, and fluoroacrylate in a weight ratio of 1.5:1:1;

[0133] (1) placing glycidyl acrylate modified polycarbonate, hydrogenated bisphenol A epoxy resin, tetraphenol ethane tetraglycidyl ether epoxy resin, and a curing agent in parts by weight into a curing oven and curing for 18 minutes at a curing temperature of 235° C. to obtain a synthetic resin;

[0134] (2) Add the auxiliary agent and the permeation enhancer into the reaction kettle and stir for 3.5 minutes at a stirring temperature of 20° C. to obtain a mixture A;

[0135] (3) Adding the synthetic resin and mixture A into a reaction kettle and stirring for 9 minutes at a stirring temperature of 140° C. to obtain mixture B;

[0136] (4) Add the phosphor to the mixture B and stir for 5.5 minutes at a temperature of 95° C. to obtain a mixture C;

[0137] (5) subjecting the mixture C to a melt-extrusion mixing process, cooling and crushing the extrudate, and grinding it into a powder of 20-25 μm to obtain a high-brightness luminous thermosetting powder coating; wherein the grinding includes a first grinding and a second grinding, wherein the first grinding is performed by a bead mill and the second grinding is performed by a three-roll mill, and after the first grinding, vacuum degassing and stirring for 20 minutes are also performed;

[0138] The preparation method of glycidyl acrylate modified polycarbonate comprises the following steps: dissolving 1 part by weight of β-diimine nickel catalyst in 27 parts by weight of glycidyl acrylate to obtain a mixture, and transferring the mixture into an autoclave; introducing carbon dioxide gas into the autoclave, and controlling the pressure of the autoclave to be 0.5-4 MPa; reacting at 25° C. for 10 hours, dissolving the mixture in a toluene solution, heating the solution to 80° C., and adding 3.5 parts by weight of 2,4-diphenyl-4-methyl-1-pentene; introducing nitrogen into the solution, controlling the pressure of the autoclave to be atmospheric pressure, and continuing the reaction at 80° C. for 18 hours; adding the reactants into an ethanol solution, washing and filtering the solution twice, and drying the solution in a vacuum oven for 24 hours to obtain the glycidyl acrylate modified polycarbonate;

[0139] The preparation of phosphor includes the following steps:

[0140] S1. According to the chemical formula Sr 2.6 La 1.3 (PO4) 2.7 (SiO4) 0.3 : The stoichiometric amount in 0.1Eu was 0.576g SrCO3, 0.318g La2O3, 0.535g (NH4)2HPO4, 0.027g SiO2, and 0.026g Eu2O3 were mixed in anhydrous ethanol, and the mixture was ground for 40 minutes to obtain a precursor;

[0141] S2. The precursor was preheated at 180 ° C for 1.3 hours to obtain a dry powder;

[0142] S3. The dried powder was sintered at 1100° C. for 4.5 hours in a reducing atmosphere obtained by mixing H 2 and Ne in a molar ratio of 1:19 to obtain a phosphor.

[0143] The powder coatings prepared in Examples 1-4 and Comparative Examples 1-4 were sprayed onto the surface of an aluminum plate substrate using an electrostatic spray gun, and then heated and cured in an oven at 200° C. for 15 minutes. After the required curing time was reached, the sample was removed to obtain a powder coating with a coating thickness of 60-80 μm. The relevant properties of the powder coatings and the powder coatings were tested. The test method is as follows:

[0144] Pencil hardness, adhesion, abrasion resistance and aging resistance are tested according to the HG / T 2006-2022 standard.

[0145] The light transmittance is tested according to the standard of GB / T 2410-2008.

[0146] Performance test data is shown in Table 1 below:

[0147] Table 1

[0148]

[0149] As can be seen from Table 1, the high-brightness luminous thermosetting powder coatings of Examples 1-4 of the present application have good performance in all aspects. With the mutual matching of specific raw material ratios, the storage stability, hardness, adhesion, wear resistance, aging resistance and light transmittance of the prepared coatings and coatings can reach a high level.

[0150] Ordinary polycarbonate is used in the raw materials of Comparative Example 1, and the rest are the same as Example 1. The storage stability, hardness, adhesion, wear resistance and aging resistance of the prepared powder coating all show a significant decline, and the coating performance is obviously not as good as the coating prepared in Examples 1-4 of this application, indicating that the use of polycarbonate modified with acrylate is very important for the high-brightness luminous thermosetting powder coating in this application. Acrylic acid glycidyl ester contains double bonds and epoxy groups. Acrylic acid glycidyl ester modified polycarbonate can make up for the shortcomings of polycarbonate in terms of poor weather resistance, fatigue resistance and wear resistance, improve the hardness of the coating film, make the coating more wear-resistant and scratch-resistant, and improve the gloss of the coating film, making the coating brighter and more beautiful, improving weather resistance, and not easy to yellow or discolor after long-term use, maintaining the stability of the luminous performance. Changing this combination will have a great impact on the performance of the prepared coating.

[0151] The anti-settling agent in the raw materials of Comparative Example 2 does not contain polyamide wax, and the rest are the same as in Example 1. The storage stability, hardness, adhesion, wear resistance, aging resistance and light transmittance of the prepared powder coating all show a significant decrease, and the coating performance is obviously not as good as the coatings prepared in Examples 1-4 of the present application, indicating that the use of a specific proportion of organic bentonite and polyamide wax with an average particle size of 50-100nm as the anti-settling agent is very important for the high-brightness luminous thermosetting powder coating in this application. The addition of the anti-settling agent can reduce the sinking of the powder, maintain the uniformity of the powder distribution, and improve the light transmittance of the powder coating. Changing this combination will have a great impact on the performance of the prepared coating.

[0152] The transmittance enhancer in the raw materials of Comparative Example 3 only contains nano-silica, and the rest are the same as in Example 1. The wear resistance and transmittance of the prepared powder coating are significantly reduced, and the coating performance is obviously not as good as the coatings prepared in Examples 1-4 of this application, indicating that the use of a specific proportion of nano-silica, isopropyltriethoxysilane and fluoroacrylate as a transmittance enhancer is very important for the high-brightness luminous thermosetting powder coating in this application. The fixed combination of transmittance enhancers can change the refractive index and transmittance of the synthetic resin, making it easier for light to pass through the resin and increase the brightness of the powder coating. Changing this combination will have a great impact on the performance of the prepared coating.

[0153] The raw materials of Comparative Example 4 do not contain antioxidants, and the rest are the same as Example 1. The wear resistance and aging resistance of the prepared powder coating are significantly reduced, and the coating performance is obviously not as good as the coating prepared in Examples 1-4 of this application. This shows that the use of specific antioxidants is very important for the high-brightness luminous thermosetting powder coating in this application. Antioxidants can increase the storage time of high-brightness luminous thermosetting powder coatings, maintain the group activity in the coating, and improve the coating curing effect. Changing this combination will have a great impact on the performance of the prepared coating.

[0154] Although the embodiments of the present application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions or variations may be made to these embodiments without departing from the principles and purpose of the present application, and that the technical solutions after these changes, modifications, substitutions or variations will fall within the scope of protection of the present application.

Claims

1. A high-brightness luminous thermosetting powder coating, characterized in that: The preparation comprises the following raw materials in parts by weight: 20-30 parts of glycidyl acrylate modified polycarbonate, 15-25 parts of hydrogenated bisphenol A epoxy resin, 15-25 parts of tetraphenol ethane tetraglycidyl ether epoxy resin, 2-5 parts of curing agent, 1-2 parts of transmittance enhancer, 1-3 parts of auxiliary agent, 6-10 parts of phosphor, 0.5-1 part of antioxidant; Wherein, the auxiliary agent comprises a dispersant and an anti-settling agent in a weight ratio of (1-3):1; The preparation of the glycidyl acrylate modified polycarbonate comprises the following steps: dissolving 0.5-2 parts by weight of a β-diimine nickel catalyst in 25-30 parts by weight of glycidyl acrylate to obtain a mixture, and transferring the mixture into an autoclave; introducing carbon dioxide gas into the autoclave to control the pressure of the autoclave at 0.5-4 MPa; reacting the mixture at 25° C. for 8-12 hours, dissolving the mixture in a toluene solution, heating the solution to 80° C., and adding 3-4 parts by weight of 2,4-diphenyl-4-methyl-1-pentene; introducing nitrogen gas to control the pressure of the autoclave to normal pressure, and continuing the reaction at 80° C. for 10-24 hours to obtain a reactant; adding the reactant into an ethanol solution, washing and filtering the solution twice, and drying the solution in a vacuum oven for 24 hours to obtain the glycidyl acrylate modified polycarbonate; The anti-settling agent is a mixture of organic bentonite and polyamide wax; The transmittance enhancer comprises nano-silica, isopropyltriethoxysilane and fluoroacrylate; The nano-silica, isopropyltriethoxysilane and fluoroacrylate are used in a weight ratio of (1-2):1:

1.

2. The high-brightness luminous thermosetting powder coating according to claim 1, characterized in that: The dispersants include urethanes and polycarboxylate ethers.

3. The high-brightness luminous thermosetting powder coating according to claim 1, characterized in that: The average particle size of the anti-settling agent is 50-100 nm.

4. The high-brightness luminous thermosetting powder coating according to claim 1, characterized in that: The preparation of the phosphor comprises the following steps: S1. According to the chemical formula Sr 2.6 La 1.3 (PO4) 2.7 (SiO4) 0.3 :0.1Eu in the stoichiometric, will contain Sr 2+ Compounds containing La 3 + Compounds, phosphate compounds, Si-containing 4+ The compound and the Eu-containing compound are mixed uniformly in an organic solvent, and the mixture is ground for 40 minutes to obtain a precursor; S2. The precursor is preheated at 150-200 ° C for 1-1.5 hours to obtain a dry powder; S3. The dried powder is sintered in a reducing atmosphere at 1000-1200° C. for 4-5 hours to obtain a phosphor.

5. The high-brightness luminous thermosetting powder coating according to claim 1, characterized in that: The curing agent comprises a hydroxyalkylamide curing agent and a blocked isocyanate curing agent in a weight ratio of (1-2):

1.

6. The high-brightness luminous thermosetting powder coating according to claim 1, characterized in that: The antioxidant is selected from at least one of 2,6-di-tert-butyl-p-cresol, tert-butylhydroquinone, butylated hydroxyanisole, hydroquinone or o-methylhydroquinone.

7. A method for preparing the high-brightness luminous thermosetting powder coating according to any one of claims 1 to 6, characterized in that: The following steps are involved: (1) placing glycidyl acrylate modified polycarbonate, hydrogenated bisphenol A epoxy resin, tetraphenol ethane epoxy resin, and a curing agent in parts by weight into a curing oven and curing for 16-20 minutes at a curing temperature of 220-250° C. to obtain a synthetic resin; (2) Adding the auxiliary agent and the permeation enhancer into the reaction kettle and stirring for 3-4 minutes at a stirring temperature of 15-25° C. to obtain a mixture A; (3) adding the synthetic resin and mixture A into a reaction kettle and stirring for 8-10 minutes at a stirring temperature of 130-150° C. to obtain mixture B; (4) adding the phosphor and antioxidant to the mixture B respectively and stirring for 5-6 minutes at a stirring temperature of 90-100° C. to obtain a mixture C; (5) The mixture C is melt-extruded and mixed, and the extrudate is cooled, crushed, and ground into a powder of 20-25 μm to obtain a high-brightness luminous thermosetting powder coating.

8. The method for preparing the high-brightness luminous thermosetting powder coating according to claim 7, characterized in that: The grinding in step (5) includes a first grinding and a second grinding.

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