Epoxy anticorrosive primer powder coating

Abstract

The invention belongs to the technical field of coatings, and particularly relates to an epoxy anti-corrosion primer powder coating which comprises raw materials. The raw materials comprise the following components in parts by weight: 300 to 480 parts of epoxy resin, 280 to 300 parts of polyester resin, 100 to 140 parts of a phenolic aldehyde curing agent, 8 to 12 parts of a flatting agent, 1 to 5 parts of benzoin, 3 to 7 parts of a brightener, 1 to 5 parts of PE wax, 0.3 to 0.7 part of dimethylmizole, 18 to 22 parts of an adhesion promoter, 38 to 42 parts of zinc phosphate, 38 to 42 parts of zinc powder, 90 to 110 parts of titanium dioxide, 3 to 7 parts of pigment and 160 to 260 parts of barium sulfate. The adhesive force of the epoxy anti-corrosion base powder coating is greatly improved, and then the phenomenon of falling can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of coating technology, in particular to an epoxy anticorrosive primer powder coating. BACKGROUND

[0002] Corrosion is a chronic disease of metal materials represented by iron-based materials. The direct and indirect economic losses caused by metal corrosion problems are about 500 billion yuan per year, accounting for about 6% of China's gross national product, which is four times the loss of natural disasters. The main means of corrosion protection of metal components before final service are painting, plastic coating, metal plating, and spraying ceramic coating. Zinc has excellent atmospheric corrosion resistance, so zinc is mainly used as a surface coating for steel and steel structural components. After the surface of the hot-dip galvanized alloy is oxidized, a uniform and fine basic zinc carbonate ZnCO3o3Zn(OH)2oxide film protective layer is formed, which also has the effect of preventing mold growth. The corrosion-resistant layer is usually plated with zinc.

[0003] In the case of severe corrosion environment, better corrosion protection measures need to be taken for some products or engineering equipment, and zinc plating plus coating is considered a good method. Zinc plating is generally divided into electroplating zinc and hot-dip galvanizing, and in the case of a perfect coating, the corrosion resistance of hot-dip galvanizing is better than that of electroplating zinc.

[0004] When coating is applied to the zinc-plated layer of a product or component, the most common quality accident is poor adhesion of the coating, causing the coating to fall off. The adhesion of the coating is good at times and bad at times, and the quality is unstable in the coating and use site. There are many reasons for the poor adhesion of the zinc-plated layer and the coating: 1) dissolution of Al in the zinc-plated layer, causing accumulation of Al3+ in the phosphating tank, resulting in coarse crystallization of the phosphating film. 2) Zinc is highly active and reactive, causing a decrease in the viscosity of the coating. 3) Zinc secondary products (basic double salts) are easily dissolved in water, most of which are alkaline, and during use, water permeating through the coating reacts with the salts on the substrate, destroying the adhesion of the coating. 4) Zinc is relatively stable at a pH of 9-11, and if the pH of the water or aqueous solution permeating through the coating is not within this range, zinc will dissolve and precipitate, affecting the adhesion of the coating. 5) Zinc reacts with fatty acids present in the coating (some oil-based coatings) or in the coating to form water-soluble metal soaps (resin metal salts), which often cause the coating to become brittle and even peel off, becoming an unsolvable problem in the coating industry. An epoxy anticorrosive primer powder coating is invented. SUMMARY

[0005] In view of the above and / or existing problems in the prior art, the present application is proposed.

[0006] Therefore, the purpose of the present application is to provide an epoxy anticorrosive primer powder coating, which can solve the above-mentioned problems of the prior art.

[0007] To solve the above technical problems, according to one aspect of the present application, the present application provides the following technical solutions:

[0008] An epoxy anticorrosive primer powder coating comprises raw materials, which comprise, in parts by weight: 300-480 parts of epoxy resin, 280-300 parts of polyester resin, 100-140 parts of phenolic curing agent, 8-12 parts of leveling agent, 1-5 parts of benzoin, 3-7 parts of brightener, 1-5 parts of PE wax, 0.3-0.7 parts of dimethyl imidazole, 18-22 parts of adhesion promoter, 38-42 parts of zinc phosphate, 38-42 parts of zinc powder, 90-110 parts of titanium white, 3-7 parts of pigment, and 160-260 parts of barium sulfate.

[0009] As a preferred scheme of the epoxy anticorrosive primer powder coating, the present application further comprises a preparation method, and the specific steps are as follows:

[0010] Step one: material selection;

[0011] Step two: material feeding;

[0012] Step three: premixing;

[0013] Step four: extrusion;

[0014] Step five: crushing;

[0015] Step six: packaging.

[0016] As a preferred scheme of the epoxy anticorrosive primer powder coating, the present application further comprises a preparation method, and the specific steps are as follows:

[0017] As a preferred scheme of the epoxy anticorrosive primer powder coating, the present application further comprises a preparation method, and the specific steps are as follows:

[0018] As a preferred scheme of the epoxy anticorrosive primer powder coating, in the premixing process of step three, a lid is covered on the mixing cylinder, and then parameters of the mixing cylinder are set to enable the mixing cylinder to rotate automatically, and after the mixing cylinder stops, the raw materials are allowed to deposit in the mixing cylinder for 5 minutes.

[0019] As a preferred scheme of the epoxy anticorrosive primer powder coating, in the premixing process of step three, a lid is covered on the mixing cylinder, and then parameters of the mixing cylinder are set to enable the mixing cylinder to rotate automatically, and after the mixing cylinder stops, the raw materials are allowed to deposit in the mixing cylinder for 5 minutes.

[0020] As a preferred scheme of the epoxy anticorrosive primer powder coating, in the premixing process of step three, a lid is covered on the mixing cylinder, and then parameters of the mixing cylinder are set to enable the mixing cylinder to rotate automatically, and after the mixing cylinder stops, the raw materials are allowed to deposit in the mixing cylinder for 5 minutes.

[0021] As a preferred scheme of the epoxy anticorrosive primer powder coating, in the premixing process of step three, a lid is covered on the mixing cylinder, and then parameters of the mixing cylinder are set to enable the mixing cylinder to rotate automatically, and after the mixing cylinder stops, the raw materials are allowed to deposit in the mixing cylinder for 5 minutes.

[0022] As a preferred scheme of the epoxy anticorrosive primer powder coating, in the premixing process of step three, a lid is covered on the mixing cylinder, and then parameters of the mixing cylinder are set to enable the mixing cylinder to rotate automatically, and after the mixing cylinder stops, the raw materials are allowed to deposit in the mixing cylinder for 5 minutes.

[0023] As a preferred scheme of the epoxy anticorrosive primer powder coating, in the premixing process of step three, a lid is covered on the mixing cylinder, and then parameters of the mixing cylinder are set to enable the mixing cylinder to rotate automatically, and after the mixing cylinder stops, the raw materials are allowed to deposit in the mixing cylinder for 5 minutes.

[0024] Compared with the prior art, the present application has the advantages that:

[0025] The present application selects epoxy resin, polyester resin, phenolic curing agent, leveling agent, benzoin, brightener, PE wax, dimethyl imidazole, adhesion promoter, zinc phosphate, zinc powder, titanium white, pigment and barium sulfate as raw materials, and then is proportioned according to certain proportion, so that the adhesion of the epoxy anticorrosive base powder powder coating is greatly improved, and the phenomenon of falling off is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a physical property schematic diagram of the embodiment 1 of the present application;

[0027] Figure 2 It is a physical property schematic diagram of the embodiment 2 of the present application;

[0028] Figure 3 It is a physical property schematic diagram of the embodiment 3 of the present application;

[0029] Figure 4 It is a physical property schematic diagram of the embodiment 4 of the present application;

[0030] Figure 5 It is a physical property schematic diagram of the embodiment 5 of the present application. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0032] Embodiment 1:

[0033] The present application provides an epoxy anticorrosive base powder powder coating, which comprises raw materials, and the raw materials comprise, in terms of parts: epoxy resin 300 parts, polyester resin 300 parts, leveling agent 10 parts, benzoin 3 parts, brightener 5 parts, PE wax 3 parts, zinc phosphate 40 parts, zinc powder 40 parts, titanium white 100 parts, pigment 5 parts and barium sulfate 194 parts.

[0034] Further, a preparation method is provided, and the specific steps are as follows:

[0035] Step 1: material selection

[0036] The specific process of material selection is as follows: epoxy resin, polyester resin, phenolic curing agent, leveling agent, benzoin, brightener, PE wax, dimethyl imidazole, adhesion promoter, zinc phosphate, zinc powder, titanium white, pigment and barium sulfate are selected to obtain the required amount of epoxy resin, polyester resin, phenolic curing agent, leveling agent, benzoin, brightener, PE wax, dimethyl imidazole, adhesion promoter, zinc phosphate, zinc powder, titanium white, pigment and barium sulfate.

[0037] Step 2: feeding

[0038] The specific process of feeding is as follows: first, clean the mixing cylinder, if necessary, wash it with water, then put the raw materials into the mixing cylinder in the order of step one, and do not mix impurities into the mixing cylinder in the process;

[0039] Step three: premixing;

[0040] The specific process of premixing is as follows: cover the mixing cylinder with a lid, then set the parameters of the mixing cylinder to make it rotate automatically, after the mixing cylinder stops, the raw materials need to be precipitated in the mixing cylinder for 5 minutes, wherein the parameters of the mixing cylinder are set as follows: rotation speed 71 revolutions / min, and the mixing cylinder is started after 4 minutes;

[0041] Step four: extrusion;

[0042] The specific process of extrusion is as follows: first, set the process parameters of the extruder, then measure the temperature of each zone with a temperature gun to ensure that the process parameters meet the standards, after that, start the screw motor for extrusion and crushing, wherein the process parameters of the extruder are as follows: zone 1 90℃, zone 2 105℃, zone 3 95℃, screw rotation speed 45Hz / min, and feeding speed 25Hz / min;

[0043] Step five: crushing;

[0044] The specific process of crushing is as follows: after the extruded sheet material is cooled and enters the crushing process, first set the technical parameters of the crushing process, then add aluminum oxide C to the crushed sheet material according to the proportion, the addition proportion is 0.2%, and cold air is blown into the air inlet to cool the main mill during the whole process, after that, the obtained powder is uniform, loose, slippery and has good flowability, wherein the technical parameters of the crushing process are as follows: main mill rotation speed 45Hz / min, auxiliary mill rotation speed 20Hz / min, and feeding rotation speed 18Hz / min, and the particle size range is 382um;

[0045] Step six: packaging.

[0046] After obtaining the epoxy anticorrosive base powder coating, it is in the form of powder solid, which is firmly attached to the metal surface through high temperature curing reaction mechanism

[0047] Example 2:

[0048] The application provides an epoxy anticorrosive primer powder coating, which comprises raw materials, and the raw materials comprise, in parts by weight, 300 parts of epoxy resin, 300 parts of polyester resin, 10 parts of leveling agent, 3 parts of benzoin, 5 parts of brightener, 3 parts of PE wax, 0.5 parts of dimethyl imidazole, 40 parts of zinc phosphate, 40 parts of zinc powder, 100 parts of titanium white, 5 parts of pigment and 193.5 parts of barium sulfate.

[0049] The application further provides a preparation method, and the specific steps are as follows.

[0050] Step one: material selection;

[0051] The specific process of material selection is as follows: epoxy resin, polyester resin, phenolic curing agent, leveling agent, benzoin, brightener, PE wax, dimethyl imidazole, adhesion promoter, zinc phosphate, zinc powder, titanium white, pigment and barium sulfate are selected to obtain the required amount of epoxy resin, polyester resin, phenolic curing agent, leveling agent, benzoin, brightener, PE wax, dimethyl imidazole, adhesion promoter, zinc phosphate, zinc powder, titanium white, pigment and barium sulfate.

[0052] Step two: material feeding;

[0053] The specific process of material feeding is as follows: the mixing cylinder is cleaned first, and water washing is performed if necessary; then, the raw materials are sequentially fed into the mixing cylinder in the order of step one, and no impurities are mixed into the mixing cylinder in the process.

[0054] Step three: premixing;

[0055] The specific process of premixing is as follows: a lid is covered on the mixing cylinder, and then the parameters of the mixing cylinder are set so that the mixing cylinder can automatically rotate; after the mixing cylinder stops, the raw materials need to be allowed to settle in the mixing cylinder for 5 min, wherein the parameters of the mixing cylinder are specifically set as follows: the rotating speed is 71 revolutions / min, and the time is set to 4 min before the mixing cylinder is started to run.

[0056] Step four: extrusion;

[0057] The specific process of extrusion is as follows: the process parameters of the extruder are set first, then when the temperature of the machine reaches the set value, the temperature of each zone is measured by a temperature measuring gun to ensure that all the process parameters reach the standard, and then the screw motor is started to extrude and crush, wherein the process parameters of the extruder are as follows: 90 DEG C for zone 1, 105 DEG C for zone 2 and 95 DEG C for zone 3, the rotating speed of the screw is 45 Hz / min, and the feeding speed is 25 Hz / min.

[0058] Step five: crushing;

[0059] The specific process of its crushing is: after the extruded sheet material is cooled into the crushing process, the technical parameters of the crushing process are set first, then when each motor starts according to the set parameters, add aluminum oxide C in the crushed sheet material according to the proportion, the adding proportion is 0.2%, in the whole process, cold air needs to be blown into the air inlet to cool the main mill, then the outgoing powder is uniform, loose, slippery and good flowing dark gray powder coating, wherein the technical parameters of the crushing process are that the main mill speed is 45Hz / min, the auxiliary mill speed is 20Hz / min, the feeding speed is 18Hz / min, and the particle size range is 39um.

[0060] Step six: packaging.

[0061] After obtaining the epoxy anticorrosive primer powder coating, it is in the form of a powder solid, which is firmly attached to the metal surface through the reaction mechanism of high temperature curing.

[0062] Example 3:

[0063] The present application provides an epoxy anticorrosive primer powder coating, which comprises raw materials, the raw materials include, by weight: epoxy resin 480 parts, phenolic curing agent 120 parts, leveling agent 10 parts, benzoin 3 parts, brightener 5 parts, PE wax 3 parts, zinc phosphate 40 parts, zinc powder 40 parts, titanium white 100 parts, pigment 5 parts, barium sulfate 194 parts.

[0064] Also includes a preparation method, the specific steps are as follows:

[0065] Step one: material selection;

[0066] The specific process of its material selection is: epoxy resin, polyester resin, phenolic curing agent, leveling agent, benzoin, brightener, PE wax, dimethyl imidazole, adhesion promoter, zinc phosphate, zinc powder, titanium white, pigment and barium sulfate are selected to obtain the required amount of epoxy resin, polyester resin, phenolic curing agent, leveling agent, benzoin, brightener, PE wax, dimethyl imidazole, adhesion promoter, zinc phosphate, zinc powder, titanium white, pigment and barium sulfate;

[0067] Step two: feeding;

[0068] The specific process of its feeding is: first clean the mixing cylinder, if necessary, water washing is needed, then put the raw materials into the mixing cylinder in the order of step one, and do not mix impurities into the mixing cylinder in the process;

[0069] Step three: premixing;

[0070] The specific process of premixing is as follows: cover the mixing cylinder with a cover, then set the parameters of the mixing cylinder so that the mixing cylinder can rotate automatically, after the mixing cylinder stops, the raw materials need to be deposited in the mixing cylinder for 5 minutes, wherein the parameters of the mixing cylinder are specifically set as follows: rotation speed 71 revolutions / min, and the time is set to 4 minutes before starting the mixing cylinder to run;

[0071] Step four: extrusion;

[0072] The specific process of extrusion is as follows: first, set the process parameters of the extruder, then measure the temperature of each zone with a temperature gun when the machine temperature reaches the set value to ensure that all process parameters meet the standard, then start the screw motor to extrude and crush, wherein the process parameters of the extruder are as follows: zone 1 90 DEG C, zone 2 105 DEG C, zone 3 95 DEG C, screw rotation speed 45 Hz / min, and feeding speed 25 Hz / min;

[0073] Step five: crushing;

[0074] The specific process of crushing is as follows: after the extruded sheet material is cooled and enters the crushing process, first, set the technical parameters of the crushing process, then add aluminum oxide C to the crushed sheet material according to the proportion when all the motors are started according to the set parameters, the addition proportion is 0.2%, and cold air needs to be blown into the air inlet to cool the main mill during the whole process, then the obtained powder is uniform, loose, slippery and has good flowability, which is a dark gray powder coating, wherein the technical parameters of the crushing process are as follows: main mill rotation speed 45 Hz / min, auxiliary mill rotation speed 20 Hz / min, and feeding rotation speed 18 Hz / min, and the particle size range is 40 um;

[0075] Step six: packaging.

[0076] After obtaining the epoxy anticorrosive primer powder coating, it is in the form of a powder solid, which is firmly attached to the metal surface through a high-temperature curing reaction mechanism.

[0077] Example 4:

[0078] The present application provides an epoxy anticorrosive primer powder coating, which comprises raw materials, and the raw materials comprise, by weight, 480 parts of epoxy resin, 120 parts of phenolic curing agent, 10 parts of leveling agent, 3 parts of benzoin, 5 parts of brightener, 3 parts of PE wax, 0.5 parts of dimethyl imidazole, 40 parts of zinc phosphate, 40 parts of zinc powder, 100 parts of titanium white, 5 parts of pigment, and 193.5 parts of barium sulfate.

[0079] Also comprises a preparation method, the specific steps are as follows:

[0080] Step one: material selection;

[0081] The specific process of selecting materials is: selecting epoxy resin, polyester resin, phenolic curing agent, leveling agent, benzoin, brightener, PE wax, dimethyl imidazole, adhesion promoter, zinc phosphate, zinc powder, titanium white, pigment and barium sulfate to obtain the required amount of epoxy resin, polyester resin, phenolic curing agent, leveling agent, benzoin, brightener, PE wax, dimethyl imidazole, adhesion promoter, zinc phosphate, zinc powder, titanium white, pigment and barium sulfate;

[0082] Step two: feeding;

[0083] The specific process of feeding is: first clean the mixing cylinder, if necessary, water washing is needed, then put the raw materials into the mixing cylinder in the order of step one, and do not mix impurities into the mixing cylinder in the process;

[0084] Step three: premixing;

[0085] The specific process of premixing is: cover the mixing cylinder with a lid, then set the parameters of the mixing cylinder to make it rotate automatically, after the mixing cylinder stops, the raw materials need to be precipitated in the mixing cylinder for 5 minutes, wherein the parameters of the mixing cylinder are set as follows: rotation speed 71 revolutions / min, and the time is set to 4 minutes to start the mixing cylinder;

[0086] Step four: extrusion;

[0087] The specific process of extrusion is: first set the process parameters of the extruder, then measure the temperature of each zone with a temperature gun when the machine temperature reaches the set value to ensure that all process parameters meet the standard, then start the screw motor for extrusion and crushing, wherein the process parameters of the extruder are: zone 1 90℃, zone 2 105℃, zone 3 95℃, screw rotation speed 45Hz / min, and feeding speed 25Hz / min;

[0088] Step five: crushing;

[0089] The specific process of crushing is: after the extruded sheet material is cooled and enters the crushing process, first set the technical parameters of the crushing process, then add aluminum oxide C to the crushed sheet material according to the proportion when all the motors start according to the set parameters, the addition proportion is 0.2%, and cold air needs to be blown into the air inlet to cool the main mill during the whole process, then the obtained powder is uniform, loose, slippery and has good flowability, which is dark gray powder coating, wherein the technical parameters of the crushing process are: main mill rotation speed 45Hz / min, auxiliary mill rotation speed 20Hz / min, and feeding rotation speed 18Hz / min, and the particle size range is 41um;

[0090] Step six: packaging.

[0091] After the epoxy anticorrosive primer powder coating is obtained, it is in the form of a powder solid, and is firmly attached to the metal surface through the reaction mechanism of high-temperature curing.

[0092] Example 5:

[0093] The present application provides an epoxy anticorrosive primer powder coating, which comprises raw materials, and the raw materials comprise, by weight, 480 parts of epoxy resin, 120 parts of phenolic curing agent, 10 parts of leveling agent, 3 parts of benzoin, 5 parts of brightener, 3 parts of PE wax, 0.5 parts of dimethyl imidazole, 20 parts of adhesion promoter, 40 parts of zinc phosphate, 40 parts of zinc powder, 100 parts of titanium white, 5 parts of pigment, and 173.5 parts of barium sulfate.

[0094] The present application also provides a preparation method, and the specific steps are as follows:

[0095] Step 1: material selection;

[0096] The specific process of material selection is as follows: the epoxy resin, polyester resin, phenolic curing agent, leveling agent, benzoin, brightener, PE wax, dimethyl imidazole, adhesion promoter, zinc phosphate, zinc powder, titanium white, pigment, and barium sulfate are selected to obtain the required amounts of epoxy resin, polyester resin, phenolic curing agent, leveling agent, benzoin, brightener, PE wax, dimethyl imidazole, adhesion promoter, zinc phosphate, zinc powder, titanium white, pigment, and barium sulfate.

[0097] Step 2: feeding;

[0098] The specific process of feeding is as follows: the mixing cylinder is first cleaned, and if necessary, it is washed with water, then the raw materials are sequentially fed into the mixing cylinder in the order of step 1, and in this process, no impurities are mixed into the mixing cylinder;

[0099] Step 3: premixing;

[0100] The specific process of premixing is as follows: a lid is placed on the mixing cylinder, and then the parameters of the mixing cylinder are set so that the mixing cylinder can automatically rotate, after the mixing cylinder stops, the raw materials need to be allowed to settle in the mixing cylinder for 5 min, and the parameters of the mixing cylinder are specifically set as follows: the rotation speed is 71 revolutions / min, and in addition, the mixing cylinder is started to run after 4 min.

[0101] Step 4: extrusion;

[0102] The specific process of extrusion is as follows: first, the process parameters of the extruder are set, then when the machine temperature reaches the set value, the temperature of each zone is measured with a temperature gun to ensure that the process parameters meet the standard, then the screw motor is started for extrusion and crushing, wherein the process parameters of the extruder are: zone 1 90℃, zone 2 105℃, zone 3 95℃, screw speed 45Hz / min, feeding speed 25Hz / min;

[0103] Step five: crushing;

[0104] The specific process of crushing is as follows: after the extruded sheet material is cooled and enters the crushing process, first the technical parameters of the crushing process are set, then when each motor starts according to the set parameters, add aluminum oxide C to the crushed sheet material according to the proportion, the addition proportion is 0.2%, and cold air needs to be blown into the air inlet to cool the main mill during the whole process, then the output powder is uniform, loose, slippery and has good flowability, which is dark gray powder coating, wherein the technical parameters of the crushing process are: main mill speed 45Hz / min, auxiliary mill speed 20Hz / min, feeding speed 18Hz / min, particle size range 38-42um;

[0105] Step six: packaging.

[0106] After obtaining the epoxy anticorrosive primer powder coating, it is in the form of powder solid, which is firmly attached to the metal surface through high temperature curing reaction mechanism.

[0107] In summary, the actual effects of each embodiment are as follows:

[0108] Example 1: The epoxy anticorrosive primer powder coating has no adhesion on the galvanized sheet, and the whole piece is peeled off to expose the galvanized layer of the base metal;

[0109] Example 2: The epoxy anticorrosive primer powder coating has no peeling on the galvanized sheet, but the adhesion test is also very poor;

[0110] Example 3: The epoxy anticorrosive primer powder coating has no qualitative change on the galvanized sheet, and the cross-hatch test is detached from the base metal surface;

[0111] Example 4: The epoxy anticorrosive primer powder coating has no qualitative change on the galvanized sheet, and the cross-hatch test is detached from the base metal surface;

[0112] Example 5: The adhesion of the epoxy anticorrosive primer powder coating on the galvanized sheet is greatly improved, and the flexibility of the coating is also greatly improved, and the cross-hatch test is not detached from the base metal surface. The reaction mechanism of example 5 is as follows:

[0113]

[0114] Although the present application has been described with reference to the embodiments above, various changes and modifications can be suggested to one skilled in the art, and it is intended that the present application encompass such changes and modifications as fall within the scope of the appended claims. Particularly, each feature disclosed in the description and / or the claims can be used in the combination with each of the features disclosed in the description and / or the claims, unless specifically stated otherwise. Therefore, the present application is not intended to be limited to the particular embodiments disclosed in the description and / or the claims.

Claims

1. An epoxy anticorrosive primer powder paint comprising a raw material, characterized by, The raw materials include by weight: epoxy resin 300-480 parts, polyester resin 280-300 parts, phenolic curing agent 100-140 parts, leveling agent 8-12 parts, benzoin 1-5 parts, brightener 3-7 parts, PE wax 1-5 parts, dimethyl imidazole 0.3-0.7 parts, adhesion promoter 18-22 parts, zinc phosphate 38-42 parts, zinc powder 38-42 parts, titanium white 90-110 parts, pigment 3-7 parts, and barium sulfate 160-260 parts.

2. An epoxy anticorrosive primer powder paint according to claim 1, characterized in that, The application also provides a preparation method, and the specific steps are as follows: Step one: material selection; Step two: material feeding; Step three: premixing; Step four: extrusion; Step five: crushing; Step six: packaging.

3. An epoxy anticorrosive primer powder paint according to claim 2, characterized in that, The specific process of material selection in step one is as follows: epoxy resin, polyester resin, phenolic curing agent, leveling agent, benzoin, brightener, PE wax, dimethyl imidazole, adhesion promoter, zinc phosphate, zinc powder, titanium white, pigment and barium sulfate are selected to obtain the required amount of epoxy resin, polyester resin, phenolic curing agent, leveling agent, benzoin, brightener, PE wax, dimethyl imidazole, adhesion promoter, zinc phosphate, zinc powder, titanium white, pigment and barium sulfate.

4. The epoxy anticorrosive primer powder paint according to claim 2, characterized in that, The specific process of material feeding in step two is as follows: the mixing cylinder is cleaned first, and water washing is needed if necessary, then the raw materials are sequentially fed into the mixing cylinder according to the order of step one, and no impurities are mixed into the mixing cylinder in the process.

5. The epoxy anticorrosive primer powder paint according to claim 2, characterized in that, The specific process of premixing in step three is as follows: the mixing cylinder is covered with a lid, and then the parameters of the mixing cylinder are set to enable the mixing cylinder to rotate automatically, and after the mixing cylinder stops, the raw materials need to be allowed to settle in the mixing cylinder for 5 minutes.

6. An epoxy anticorrosive primer powder paint according to claim 5, characterized in that, The parameters of the mixing cylinder are set as follows: the rotation speed is 71 revolutions per minute, and the mixing cylinder is started to run after 4 minutes.

7. The epoxy anticorrosive primer powder paint according to claim 2, characterized in that, The specific process of extrusion in step four is as follows: the process parameters of the extruder are set first, then when the temperature of the machine reaches the set value, the temperature of each zone is measured with a temperature gun to ensure that all process parameters meet the standards, and then the screw motor is started to extrude and crush.

8. The epoxy anticorrosive primer powder paint according to claim 7, characterized in that, The process parameters of the extruder are as follows: zone 1 is 90°C, zone 2 is 105°C, and zone 3 is 95°C, the screw rotation speed is 45 Hz / min, and the feeding speed is 25 Hz / min.

9. The epoxy anticorrosive primer powder paint according to claim 2, characterized in that, The specific process of crushing in step five is as follows: after the extruded sheet material is cooled and enters the crushing process, the technical parameters of the crushing process are set first, then when all the motors start according to the set parameters, aluminum oxide C is added to the crushed sheet material according to the proportion, the addition proportion is 0.2%, and cold air is blown into the air inlet to cool the main mill during the whole process, and then the obtained powder is a uniform, loose, slippery and well-flowing dark gray powder coating.

10. The epoxy anticorrosive primer powder paint according to claim 9, characterized in that, The technical parameters of the crushing process are as follows: the main mill rotation speed is 45 Hz / min, the auxiliary mill rotation speed is 20 Hz / min, the feeding rotation speed is 18 Hz / min, and the particle size range is 38-42 um.

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