Preparation method and device of polyether amine modified waterborne epoxy heavy-duty anticorrosive coating

Abstract

This invention relates to the field of coating production technology, specifically to a method and apparatus for preparing a polyetheramine-modified waterborne epoxy heavy-duty anti-corrosion coating. The polyetheramine-modified waterborne epoxy heavy-duty anti-corrosion coating comprises, by weight, 30-35 parts of modified bisphenol A epoxy resin, 3-8 parts of polyetheramine-modified waterborne epoxy resin, 0.7-1 parts of dispersant, 0.05-0.1 parts of defoamer, 15-20 parts of pigment, 5-10 parts of rust inhibitor, 7-20 parts of filler, 0.5-1 part of flash rust inhibitor, 0.5-1 part of polyurethane thickener, 0.1-0.3 parts of substrate wetting agent, 3-5 parts of dipropylene glycol butyl ether, and 10-15 parts of deionized water. This invention first chemically modifies epoxy resin by using diethanolamine for chain extension to increase its flexibility, thereby obtaining modified bisphenol A epoxy resin. Simultaneously, polyetheramine is used for its reaction to prepare polyetheramine-modified epoxy resin with an amphiphilic structure. After adding additives and mixing thoroughly, a high-performance waterborne epoxy heavy-duty anti-corrosion coating is obtained.

Description

Technical Field

[0001] This invention relates to the field of coating production technology, specifically to a method and apparatus for preparing a polyetheramine modified waterborne epoxy heavy-duty anti-corrosion coating. Background Technology

[0002] With the rapid development of industrialization and urbanization, the demand for high-performance anti-corrosion coatings is increasing daily. In many application scenarios, such as bridges, pipelines, storage tanks, industrial plants, and various metal structures, anti-corrosion coatings play a crucial role. While traditional solvent-based epoxy coatings exhibit excellent anti-corrosion performance, their high emissions of volatile organic compounds pose a serious threat to the environment and human health, failing to meet modern environmental protection requirements. Therefore, developing a water-based epoxy anti-corrosion coating that possesses both superior anti-corrosion performance and meets environmental standards has become a research hotspot in the industry.

[0003] Waterborne epoxy coatings, as an alternative to solvent-based coatings, are gradually gaining market favor due to their advantages such as low VOC emissions, good environmental performance, and convenient application. However, ordinary waterborne epoxy coatings still need improvement in terms of corrosion resistance, weather resistance, and flexibility, especially in heavy-duty corrosion protection applications where the performance requirements for coatings are more stringent. Therefore, how to improve the overall performance of waterborne epoxy coatings through modification methods has become an urgent problem to be solved.

[0004] Furthermore, when preparing the above-mentioned coatings using a traditional reactor, since the coating formulation contains solid powdered raw materials, when the powdered raw materials are added to the reactor for stirring and dispersion, the powdered materials are not fully wetted and have a low density, so they tend to float on the surface of the liquid in the reactor. This requires a long time of stirring and mixing to eliminate the material from being suspended on the liquid surface, which affects the material dispersion efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a method and apparatus for preparing polyetheramine-modified waterborne epoxy heavy-duty anti-corrosion coatings to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution.

[0007] A method for preparing a polyetheramine-modified waterborne epoxy heavy-duty anti-corrosion coating, wherein the ingredients of the polyetheramine-modified waterborne epoxy heavy-duty anti-corrosion coating, calculated by weight parts, include 30-35 parts of modified bisphenol A epoxy resin, 3-8 parts of polyetheramine-modified waterborne epoxy resin, 0.7-1 parts of dispersant, 0.05-0.1 parts of defoamer, 15-20 parts of pigment, 5-10 parts of rust inhibitor, 7-20 parts of filler, 0.5-1 parts of flash rust inhibitor, 0.5-1 parts of polyurethane thickener, 0.1-0.3 parts of substrate wetting agent, 3-5 parts of dipropylene glycol butyl ether, and 10-15 parts of deionized water;

[0008] The specific preparation steps are as follows: Modified bisphenol A epoxy resin, polyetheramine modified waterborne epoxy resin, dispersant, defoamer, pigment, rust inhibitor, filler, flash rust inhibitor, polyurethane thickener, substrate wetting agent, dipropylene glycol butyl ether, and deionized water are added to the preparation device and sequentially processed through paint preparation, dispersion, grinding, paint adjustment, testing, and packaging to obtain polyetheramine modified waterborne epoxy heavy-duty anti-corrosion coating.

[0009] Preferably, the modified bisphenol A epoxy resin is prepared by mixing bisphenol A epoxy resin and ethylene glycol butyl ether evenly, heating and stirring, adding diethanolamine, stirring and reacting, and then discharging the material.

[0010] Preferably, the preparation method of the polyetheramine modified waterborne epoxy resin is as follows: bisphenol A epoxy resin and ethylene glycol butyl ether are mixed evenly, heated and stirred, polyetheramine is added, stirred and reacted, and then discharged.

[0011] This invention also provides a preparation apparatus for polyetheramine-modified waterborne epoxy heavy-duty anti-corrosion coating, comprising a tank, a stirring rod, a first driving mechanism, and a pressing plate. The stirring rod is vertically arranged inside the tank, with its top end extending through to the top of the tank. The first driving mechanism is located at the top of the tank and is used to drive the stirring rod to rotate. A pressing mechanism is provided outside the stirring rod for pressing down and wetting the floating material on the liquid surface. The pressing mechanism includes a sleeve seat, an annular component, and a pressing plate. The sleeve seat is fitted outside the stirring rod, and the annular component is located around the sleeve seat. Several rotating shafts are rotatably mounted in an annular array between the sleeve seat and the annular component. Each rotating shaft is fitted with a pressing plate, and a separation space is formed between adjacent pressing plates. A lifting adjustment mechanism is provided at the top of the tank for driving the pressing mechanism to adjust its height. The lifting adjustment mechanism extends into the tank and is rotatably connected to the annular component. A second driving mechanism is provided on the stirring rod, which is used to drive each pressing plate to swing synchronously.

[0012] Preferably, the pressure plate is formed by a fixed connection between an upper plate strip and a lower plate strip, and the lower plate strip has through holes evenly distributed on it.

[0013] Preferably, the sleeve seat is a variable diameter structure formed by fixing a small diameter part and a large diameter part. The small diameter part and the large diameter part are coaxially slidably fitted on the stirring rod. Each rotating shaft is rotatably connected to the inner edge wall of the annular part, and the other end is rotatably connected to the large diameter part and extends through into the interior of the large diameter part. The outer wall of the stirring rod is provided with a vertically extending keyway, and a limiting key is fixed on the inner wall of the small diameter part. The limiting key is correspondingly limited and locked in the keyway.

[0014] Preferably, the second drive mechanism includes gears, racks, and a lifting device. Each shaft has a gear fixed to its end inside the large-diameter section. The lifting device is located inside the stirring rod. An annular platform is installed at the lower end of the lifting device. The lifting device is used to drive the annular platform to adjust its height. The lifting device moves up and down synchronously with the large-diameter section. Vertically extending racks are fixed to the lower surface of the annular platform at positions corresponding to the gears. Each rack meshes with each gear in a one-to-one correspondence.

[0015] Preferably, the lifting device includes a first drive motor, a screw, and an internal threaded sleeve. An inner mounting cavity is provided above the keyway inside the stirring rod. Two symmetrical guide grooves A and two symmetrical guide grooves B are provided on the outer wall of the inner mounting cavity. Guide grooves A and B communicate with the inner mounting cavity. A connecting seat is slidably installed inside the inner mounting cavity. The first drive motor is fixed to the connecting seat. A vertically downward-through screw is fixed to the output shaft of the first drive motor. The internal threaded sleeve is threadedly fitted onto the screw. Two L-shaped arms B are fixed to the outer peripheral wall of the connecting seat. After passing through the corresponding guide grooves B, the two L-shaped arms B are fixed to the top of the large-diameter portion. Two L-shaped arms A are fixed to the outer peripheral wall of the internal threaded sleeve. After passing through the corresponding guide grooves A, the two L-shaped arms A are fixed to the top of the annular platform. The annular platform is slidably fitted onto the two L-shaped arms B through two sliding holes.

[0016] Preferably, the first driving mechanism includes a drive motor and a coupling. A mounting base is fixed to the top of the tank. The top end of the stirring rod extends through the mounting base. The drive motor is fixed to the top of the mounting base, and its output shaft extends through the mounting base. The coupling is located in the mounting base, and its output end is fixedly connected to the output shaft of the drive motor and to the top end of the stirring rod.

[0017] Preferably, the lifting and adjusting mechanism includes an electric push cylinder and a ring seat. A bracket is fixed on the top of the tank. The electric push cylinder is vertically fixed on the bracket. The ring seat is located inside the tank at the periphery of the annular part. The telescopic rod of the electric push cylinder extends through the tank and is fixedly connected to the ring seat. The ring seat is rotatably connected to the annular part.

[0018] Preferably, the top of the tank has a feeding cylinder, an observation port and several liquid material feeding ports, and the bottom of the tank has a discharge port. The feeding cylinder is inclined and has a tapered structure with a smaller diameter as it goes down. A throwing mechanism is provided at the lower end of the feeding cylinder and faces the pressing mechanism. When the pressing mechanism rotates with the stirring rod, the throwing mechanism aligns with each partition space in sequence.

[0019] Preferably, the material feeding mechanism includes a rotating rod, a receiving plate, and a second drive motor. The rotating rod is rotatably mounted on the feeding cylinder near the lower end. Both ends of the rotating rod extend through to both sides of the feeding cylinder. Connecting arms are fixed on both outer ends of the rotating rod. The receiving plate is fixed on the bottom ends of the two connecting arms. A mounting bracket is fixed on the outer wall of the feeding cylinder. The second drive motor is fixed on the mounting bracket. The output shaft of the second drive motor is fixedly connected to one end of the rotating rod.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows.

[0021] Single-component waterborne epoxy resins have poor flexibility. They are modified with ethylene glycol amine to increase chain segments and improve overall flexibility. Polyether amine partially reacts with epoxy resin under heating conditions to obtain a mixture of addition product and excess unreacted epoxy resin. In the addition product, the hydrophilic polyether amine segments and the hydrophobic epoxy segments together constitute a typical surfactant structure, which can emulsify the unmodified epoxy resin without the need for other external emulsifiers.

[0022] This preparation method uses a compound system of modified bisphenol A epoxy resin and polyetheramine modified waterborne epoxy resin, combined with nonionic dispersants, rust inhibitors and other components, to prepare a coating with excellent corrosion resistance and weather resistance. Moreover, the waterborne system has low VOC emissions, which meets environmental protection requirements.

[0023] In this preparation device, the pressing mechanism, which consists of a sleeve seat, an annular component, and a pressing plate, can rotate with the stirring rod. By tilting and swinging the pressing plate, the floating material on the liquid surface is forced into the liquid and dragged to the turbulent zone, dynamically destroying the liquid surface structure and effectively accelerating the wetting and dispersion of solid powder materials.

[0024] The lifting and adjusting mechanism drives the lifting and adjusting of the pressing mechanism. Combined with the swing control of the pressing plate by the second driving mechanism, the pressing plate can break the floating material on the liquid surface when it is tilted, and disturb the liquid surface and destroy the bubble film structure by using the holes when it is vertical. It also has the functions of accelerating wetting and assisting in defoaming.

[0025] The pressure plate consists of an upper plate and a lower plate. When the pressure mechanism rotates forward, some material can flow through the holes on the lower plate. When the pressure mechanism rotates in reverse, the liquid flows through the back of the pressure plate to flush away residual material, thus preventing material accumulation and improving the mixing effect and raw material utilization.

[0026] The material throwing mechanism at the lower end of the feeding cylinder can be aligned with each partition space in sequence when the pressing mechanism rotates. The powder material is thrown evenly into each partition space in sequence by the reciprocating swing of the receiving plate. At the same time, the rotating rod can disturb the material in the narrow part of the feeding cylinder to prevent accumulation and blockage, and ensure smooth feeding. Attached Figure Description

[0027] Figure 1 This is a schematic diagram illustrating the specific steps of the preparation method provided by the present invention;

[0028] Figure 2 This is a three-dimensional schematic diagram of the overall structure of the preparation apparatus provided by the present invention;

[0029] Figure 3 This is a schematic diagram of a partial internal structure of the tank in this invention;

[0030] Figure 4 for Figure 2 The diagram shows a partial structure.

[0031] Figure 5 for Figure 2 The diagram shown omits the tank body and its external surface components.

[0032] Figure 6 This is a schematic diagram of the installation of the pressure plate structure in this invention;

[0033] Figure 7 This is a schematic diagram of the lifting device structure in this invention;

[0034] Figure 8 for Figure 6 The diagram shows a cross-sectional view of the structure.

[0035] Figure 9 for Figure 8 Enlarged schematic diagram of the structure at point A in the middle;

[0036] Figure 10 This is a schematic diagram of the material throwing mechanism in this invention;

[0037] Figure 11 This is a detailed structural diagram of the pressure plate in this invention;

[0038] Figure 12 A schematic diagram showing a pressure plate tilted downwards to press down powdered material.

[0039] Figure 13 Schematic diagram of liquid material flushing pressure plate;

[0040] Figure 14 A schematic diagram of defoaming for vertically arranged pressure plates.

[0041] In the diagram: 01. Separating space; 1. Tank body; 101. Shell; 102. Liquid inlet; 103. Liquid outlet; 104. Clamping cavity; 11. Feeding cylinder; 12. Observation port; 13. Liquid material feeding port; 14. Discharge port; 2. Stirring rod; 201. Keyway; 202. Inner mounting cavity; 203. Guide groove A; 204. Guide groove B; 21. Stirring blade; 22. Agitator blade; 3. First drive mechanism; 31. Mounting base; 32. Drive motor; 33. Coupling; 4. Sleeve seat; 41. Small diameter section; 411. Limiting key; 42. Large diameter section; 5. Annular component 51. Rotating shaft; 6. Pressure plate; 61. Upper strip; 62. Lower strip; 63. Hole; 7. Lifting and adjusting mechanism; 71. Bracket; 72. Electric push cylinder; 73. Ring seat; 8. Second drive mechanism; 81. Gear; 82. Ring platform; 83. Rack; 84. Lifting device; 841. Connecting seat; 842. First drive motor; 843. Screw; 844. Internal threaded sleeve; 845. L-shaped arm A; 846. L-shaped arm B; 9. Discharging mechanism; 91. Rotating rod; 92. Connecting arm; 93. Receiving plate; 94. Mounting bracket; 95. Second drive motor. Detailed Implementation

[0042] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0043] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the devices are connected to each other and their relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of the present invention, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0044] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0045] In this embodiment of the invention, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0046] References to "one embodiment" or "some embodiments" as used in this specification mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the invention. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless otherwise specifically emphasized.

[0047] Unless otherwise stated, all raw materials and reagents used in this invention are commercially available or can be prepared by known methods.

[0048] Dispersant: BYK190 (Germany);

[0049] Defoamer: German DIGIC 810W;

[0050] Pigment: Anada rutile titanium dioxide R-318 or Shanghai Coking Plant C311 carbon black;

[0051] Rust inhibitor: Zinc oxide;

[0052] Filler: 800-mesh sericite powder, Chuzhou Baota Sericite Mining Co., Ltd.

[0053] 1250 mesh talc powder, Anhui Gerui Chemical Co., Ltd.

[0054] 1250 mesh precipitated barium sulfate, Changzhou Jingding Chemical Co., Ltd.

[0055] Anti-flash rust additive: Qingdao Enze Chemical Co., Ltd. CK35;

[0056] Polyurethane thickener: Hemings 299;

[0057] Substrate wetting agent: German DIGIC Additives-4100;

[0058] Bisphenol A type epoxy resin: 609 epoxy resin, Jiangsu Sanmu Chemical Co., Ltd.;

[0059] Polyetheramine: Huntsman polyetheramine M3085. Example 1

[0060] Please see Figure 1 This invention provides a method for preparing a polyetheramine-modified waterborne epoxy heavy-duty anti-corrosion coating. This embodiment follows... Figure 1 The preparation process is as follows:

[0061] The polyetheramine-modified waterborne epoxy heavy-duty anti-corrosion coating comprises, by weight, 30 parts modified bisphenol A epoxy resin, 5 parts polyetheramine-modified waterborne epoxy resin, 0.8 parts dispersant, 0.1 parts defoamer, 15 parts pigment (Shanghai Coking Plant C311), 8 parts rust inhibitor, 10 parts filler (1250 mesh talc powder, Anhui Gerui Chemical Co., Ltd.), 0.5 parts flash rust inhibitor, 1 part polyurethane thickener, 0.2 parts substrate wetting agent, 4 parts dipropylene glycol butyl ether, and 15 parts deionized water.

[0062] The specific preparation steps are as follows: Modified bisphenol A epoxy resin, polyetheramine modified waterborne epoxy resin, dispersant, defoamer, pigment, rust inhibitor, filler, flash rust inhibitor, polyurethane thickener, substrate wetting agent, dipropylene glycol butyl ether, and deionized water are added to the preparation device and sequentially processed through paint preparation, dispersion, grinding, paint adjustment, testing, and packaging to obtain polyetheramine modified waterborne epoxy heavy-duty anti-corrosion coating.

[0063] The preparation method of the modified bisphenol A epoxy resin is as follows:

[0064] Mix 50 parts of bisphenol A epoxy resin and 35 parts of ethylene glycol butyl ether evenly, stir and heat to 135°C, cool to 80°C, add 10 parts of diethanolamine, stir and react for 2 hours, and then discharge.

[0065] The preparation method of the polyetheramine modified waterborne epoxy resin:

[0066] Mix 40 parts of bisphenol A epoxy resin and 35 parts of ethylene glycol butyl ether evenly, stir and heat to 135°C, cool to 80°C, add 10 parts of polyetheramine, stir and react for 1.5 hours, and then discharge.

[0067] Modified bisphenol A epoxy resin and polyetheramine-modified waterborne epoxy resin are used as base resins, with the addition of dispersants, defoamers, pigments, rust inhibitors, fillers, flash rust inhibitors, polyurethane thickeners, substrate wetting agents, dipropylene glycol butyl ether, and deionized water. The dispersant ensures that solid components such as pigments and fillers are uniformly dispersed in the resin system. Additives such as defoamers, flash rust inhibitors, thickeners, and substrate wetting agents adjust the coating's leveling properties, flash rust prevention performance, and application properties. The scientific ratio of pigments and rust inhibitors further enhances the coating's anti-corrosion effect and improves its application properties and film quality. The combination of modified bisphenol A epoxy resin and polyetheramine-modified waterborne epoxy resin significantly improves the coating's corrosion resistance and weather resistance, making it suitable for various harsh environments.

[0068] This coating uses a water-based system, reducing the use of organic solvents and lowering environmental pollution. The pigments, rust inhibitors, and fillers are all environmentally friendly materials, meeting modern environmental protection requirements. The performance indicators (HG / T 4759—2014) of the coating prepared using the method provided in this invention are shown in Table 1:

[0069] Table 1

[0070] Example 2

[0071] Please see Figures 2-14 This invention provides a preparation apparatus for polyetheramine-modified waterborne epoxy heavy-duty anti-corrosion coating, used in the preparation of the coating in Example 1. The preparation apparatus includes a tank 1, a stirring rod 2, a first driving mechanism 3, and a pressure plate 6. The top of the tank 1 has a feeding cylinder 11, an observation port 12, and several liquid material feeding ports 13. The feeding cylinder 11 is used for feeding solid materials, the observation port 12 is used to observe the internal stirring and dispersion, and the liquid material feeding ports 13 are equipped with valves for feeding liquid materials. The bottom of the tank 1 has a discharge port 14, which is equipped with valves to discharge the prepared coating.

[0072] In addition, such as Figure 2 and Figure 3 As shown, the tank body 1 is also provided with a shell 101 on the outside, and a cavity 104 is formed between the shell 101 and the tank body 1. The bottom of the shell 101 is provided with a liquid inlet 102 communicating with the cavity 104, and the side of the shell 101 is provided with a liquid outlet 103 communicating with the cavity 104. The heating phase is supplied into the cavity 104 from the liquid inlet 102 to heat the tank body 1. The heating phase in the cavity 104 can also be discharged from the liquid outlet 103 to provide the required environmental heat conditions for preparation.

[0073] The stirring rod 2 is vertically installed inside the tank 1, with its top end extending through to the top of the tank 1. The first drive mechanism 3 is located at the top of the tank 1. Figure 3 and Figure 5 As shown, the part of the stirring rod 2 located inside the tank 1 is equipped with stirring blades 21 and agitating blades 22. The stirring rod 2 can be driven to rotate by the first driving mechanism 3. The rotating stirring rod 2 drives the stirring blades 21 and agitating blades 22 to rotate. The rotating stirring blades 21 can stir, disperse and mix the material in the tank 1. The rotating agitating blades 22 can stir the material from the bottom to the top, so that the material at the bottom flows upward and avoids excessive settling of the material and uneven mixing.

[0074] The stirring rod 2 is provided with a pressing mechanism for pressing down and wetting the floating material on the liquid surface. The pressing mechanism includes a sleeve seat 4, an annular part 5 and a pressing plate 6. The sleeve seat 4 is fitted on the outside of the stirring rod 2, and the annular part 5 is located around the sleeve seat 4. Several rotating shafts 51 are rotatably mounted in an annular array between the sleeve seat 4 and the annular part 5. Each rotating shaft 51 is fitted with a pressing plate 6. The rotating shafts 51 enable each pressing plate 6 to rotate and adjust. In addition, a partition space 01 is formed between two adjacent pressing plates 6 to separate the powdered material.

[0075] In addition, the top of the tank body 1 is provided with a lifting adjustment mechanism 7 for driving the material pressing mechanism to lift and adjust. The lifting adjustment mechanism 7 extends into the inner part of the tank body 1 and is rotatably connected to the annular part 5. The stirring rod 2 is provided with a second driving mechanism 8.

[0076] During the preparation process, liquid materials are fed into the tank 1 through the liquid material inlet 13, and solid or powder materials are fed into the tank 1 through the feeding cylinder 11. The first drive mechanism 3 drives the stirring rod 2, stirring blade 21 and stirring paddle 22 to rotate, so as to carry out material stirring and mixing.

[0077] When solid and powder materials are added, the second drive mechanism 8 drives each pressing plate 6 to swing to an inclined position, and the lifting and adjusting mechanism 7 drives the pressing structure to make corresponding lifting and adjusting until half of the pressing plate 6 is above the liquid surface. Then, the pressing structure follows the stirring rod 2 to rotate forward. (6) It can break the powder layer floating on the liquid surface. The surface of the pressing plate 6 can force the material floating on the liquid surface into the liquid and drag it to the turbulent zone below, accelerate the wetting of the floating material, and continuously and dynamically destroy and renew the liquid surface structure during the rotation, effectively improving the dispersion efficiency of solid powder materials. Example 3

[0078] Please see Figure 11 The difference between this embodiment and Embodiment 2 is that:

[0079] The pressure plate 6 is formed by a fixed connection between an upper plate 61 and a lower plate 62. The lower plate 62 has evenly distributed through holes 63. When the pressure plate 6 is adjusted to an inclined position and rotates clockwise with the stirring rod 2, as... Figure 12 As shown in the figure, the solid arrows indicate the direction of movement of the upper strip 61, and the dashed arrows indicate the direction of fluid movement. Some of the floating material flows through the hole 63 to the other side, and the other part of the floating material flows over the bottom of the lower strip 62 to the other side. This process ensures that the floating material is fully immersed below the liquid surface and can be fully wetted, thereby effectively accelerating the mixing of solid powder materials.

[0080] When solid powder materials are added, some of the material falls onto the back of the pressing plate 6, away from the liquid surface. The first drive mechanism 3 drives the stirring rod 2, causing the pressing mechanism to rotate in the opposite direction. Figure 13As shown in the figure, the solid arrows indicate the direction of movement of the pressure plate 6, and the dashed arrows indicate the direction of liquid flow. Under the action of extrusion, some liquid flows through the back of the pressure plate 6 and over the top of the pressure plate 6 to the other side, which can flush the material accumulated on the back of the pressure plate 6 into the liquid for mixing, and avoid material residue accumulating on the back of the pressure plate 6.

[0081] After the floating material on the liquid surface is fully immersed in the liquid, the second drive mechanism 8 drives each pressing plate 6 to swing and adjust to a vertical position. The lifting and adjusting mechanism 7 drives the pressing device to rise and fall accordingly until the liquid surface is at the hole 63. The stirring rod 2 drives the pressing device to rotate. Figure 14 As shown in the figure, the solid arrow indicates the direction of movement of the pressure plate 6, and the dashed arrow indicates the direction of flow of liquid and bubbles. The moving pressure plate 6 can impact and break the original structure of the liquid surface, while the bubbles and liquid pass through the holes 63, which has an additional defoaming effect.

[0082] In addition, when the pressure plate 6 is adjusted to a vertical position, the area of ​​the partition space 01 formed between two adjacent pressure plates 6 is the largest, which makes it easier to observe the mixing situation inside the tank 1 through the observation port 12, and avoids the pressure plate 6 from excessively obstructing the observation field. Example 4

[0083] Please see Figures 6-9 The difference between this embodiment and embodiment 3 is as follows:

[0084] The sleeve seat 4 is a variable diameter structure formed by fixing a small diameter portion 41 and a large diameter portion 42. The small diameter portion 41 and the large diameter portion 42 are coaxially slidably fitted on the stirring rod 2. Each rotating shaft 51 is rotatably connected to the inner edge wall of the annular part 5, and the other end is rotatably connected to the large diameter portion 42 and extends through into the interior of the large diameter portion 42. A vertically extending keyway 201 is provided on the outer wall of the stirring rod 2. A limiting key 411 is fixed on the inner wall of the small diameter portion 41. The limiting key 411 is correspondingly limited and locked in the keyway 201. By utilizing the limiting cooperation between the limiting key 411 and the keyway 201, the sleeve seat 4 only has the ability to slide up and down along the stirring rod 2 for adjustment. Thus, when the first driving mechanism 3 drives the stirring rod 2 to rotate, it can ensure that the pressing mechanism rotates synchronously.

[0085] like Figures 7-9 As shown, the second drive mechanism 8 includes a gear 81, a rack 83, and a lifting device 84. Each shaft 51 has a gear 81 fixed on its end inside the large diameter section 42. The lifting device 84 is located inside the stirring rod 2. An annular platform 82 is installed at the lower end of the lifting device 84. The lifting device 84 is used to drive the annular platform 82 to adjust its height. The lifting device 84 moves up and down synchronously with the large diameter section 42. A vertically extending rack 83 is fixed on the lower surface of the annular platform 82 at the position corresponding to each gear 81. Each rack 83 meshes with each gear 81 in a one-to-one correspondence.

[0086] The lifting device 84 includes a first drive motor 842, a screw 843, and an internal threaded sleeve 844. The stirring rod 2 has an inner mounting cavity 202 located above the keyway 201. The outer wall of the inner mounting cavity 202 has two symmetrical guide grooves A203 and two symmetrical guide grooves B204, which are connected to the inner mounting cavity 202. A connecting seat 841 is slidably installed in the inner mounting cavity 202. The first drive motor 842 is fixed on the connecting seat 841. A vertically downward-through screw 843 is fixed on the output shaft of the first drive motor 842. The internal threaded sleeve 844 is threadedly fitted onto the screw 843. Two L-shaped arms B846 are fixed on the outer peripheral wall of the connecting seat 841. After passing through the corresponding guide grooves B204, the two L-shaped arms B846 are fixed to the top of the large diameter part 42, so that the lifting device 84 can rise and fall synchronously with the sleeve seat 4.

[0087] Two L-shaped arms A845 are fixed on the outer peripheral wall of the internal threaded sleeve 844. After passing through the corresponding guide groove A203, the two L-shaped arms A845 are fixed to the top of the annular platform 82. The annular platform 82 is slidably fitted onto the two L-shaped arms B846 through two sliding holes on it.

[0088] The specific principle of the swing adjustment by driving the pressure plate 6 through the second drive mechanism 8 is as follows:

[0089] The first drive motor 842 operates, and its output shaft drives the screw 843 to rotate. The rotating screw 843 drives the internal threaded sleeve 844 to rise and fall. Under the fixed connection of the L-shaped arm A845, it drives the ring platform 82 and the rack 83 to rise and fall synchronously. The rising rack 83 can mesh with the drive gear 81 to rotate. The rotating gear 81 drives the rotating shaft 51 and the pressure plate 6 to rotate, thereby realizing the angle adjustment of the pressure plate 6.

[0090] The L-shaped arm B846 slides through the sliding hole on the annular platform 82, serving as a limiting and guiding function to ensure that the lifting and lowering of the annular platform 82 is smoother and more stable. Example 5

[0091] Please refer to the figure. Figure 4 and Figure 5 The difference between this embodiment and embodiment 4 is that:

[0092] The first drive mechanism 3 includes a drive motor 32 and a coupling 33. A mounting base 31 is fixed on the top of the tank 1. The top end of the stirring rod 2 extends through the mounting base 31. The drive motor 32 is fixed on the top of the mounting base 31, and its output shaft extends through the mounting base 31. The coupling 33 is located in the mounting base 31, and its output end is fixedly connected to the output shaft of the drive motor 32 and the top end of the stirring rod 2. When the drive motor 32 works, its output shaft can drive the stirring rod 2 to rotate under the coupling transmission of the rack 83, providing a stable drive for the stirring action of the stirring rod 2. In addition, the drive motor 32 adopts existing technology and has forward and reverse functions. The specific structure and working principle will not be described in detail.

[0093] The lifting and adjusting mechanism 7 includes an electric push cylinder 72 and a ring seat 73. A bracket 71 is fixed on the top of the tank body 1. The electric push cylinder 72 is vertically fixed on the bracket 71. The ring seat 73 is located inside the tank body 1 at the periphery of the annular part 5. The telescopic rod of the electric push cylinder 72 extends through into the tank body 1 and is fixedly connected to the ring seat 73. The ring seat 73 is rotatably connected to the annular part 5.

[0094] Specifically, the cross-section of the ring seat 73 is a transverse U-shape, and the cross-section of the ring member 5 is a transverse T-shape. The protrusion of the ring member 5 is matched and rotated in the concave part of the ring seat 73, so that the ring seat 73 and the ring member 5 can be rotatably connected.

[0095] The electric push cylinder 72 extends and retracts, and its extension end can drive the ring seat 73 and the ring part 5 to rise and fall synchronously. In turn, it can drive the rotating shaft 51, the pressure plate 6, the sleeve seat 4 and the second drive mechanism 8 to rise and fall synchronously, providing a stable drive for the lifting and adjustment of the pressure mechanism. Example 6

[0096] Please see Figure 3 , Figure 4 and Figure 10 The difference between this embodiment and embodiment 5 is as follows:

[0097] Specifically, the feeding cylinder 11 has an inclined, tapered structure with a smaller diameter towards the bottom. A throwing mechanism 9 is provided at the lower end of the feeding cylinder 11 and faces the pressing mechanism. When the pressing mechanism rotates with the stirring rod 2, the throwing mechanism 9 aligns with each partition space 01 in sequence. When the pressing mechanism rotates to the point where the throwing mechanism 9 aligns with a certain partition space 01, the receiving plate 93 feeds material into that space.

[0098] like Figure 10As shown, the material feeding mechanism 9 includes a rotating rod 91, a receiving plate 93, and a second drive motor 95. The rotating rod 91 is rotatably mounted on the feeding cylinder 11 near the lower end. Both ends of the rotating rod 91 extend through to both sides of the feeding cylinder 11. Connecting arms 92 are fixed on both outer ends of the rotating rod 91. The receiving plate 93 is fixed on the bottom ends of the two connecting arms 92. A mounting bracket 94 is fixed on the outer wall of the feeding cylinder 11. The second drive motor 95 is fixed on the mounting bracket 94. The output shaft of the second drive motor 95 is fixedly connected to one end of the rotating rod 91.

[0099] The fixed powder material fed into the feeding cylinder 11 is discharged through the lower port of the feeding cylinder 11 and falls onto the receiving plate 93. The second drive motor 95 drives the rotating rod 91 to rotate in both directions. Under the connection of the connecting arm 92, the receiving plate 93 is driven to swing back and forth on both sides. Under the action of inertia, the material can be thrown into each partition space 01, which effectively ensures that the fixed powder material falling into each partition space 01 is evenly distributed, avoids excessive accumulation and affects the mixing effect, and further improves the preparation quality.

[0100] Furthermore, since the inner diameter of the bottom of the feeding cylinder 11 is the smallest, materials are prone to bridging and clogging when passing through this area. The rotating rod 91 runs through the inside of the feeding cylinder 11. When the second drive motor 95 drives the rotating rod 91 to rotate in both directions, the rotating rod 91 rotates inside the feeding cylinder 11, which can dynamically change the internal material accumulation structure, thereby effectively preventing materials from accumulating and clogging in narrow places, improving the smoothness of material flow and the stability of equipment operation. The rotating rod 91 serves as both a transmission component for the rotation of the receiving plate 93 and a disturbance component to prevent material accumulation and clogging, achieving two goals at once.

[0101] It is worth noting that both the first drive motor 842 and the second drive motor 95 in this application are waterproof and high-temperature resistant motors to cope with the high temperature and high humidity working environment inside the tank 1.

[0102] Furthermore, the control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Therefore, the present invention will not explain the control method and circuit connection in detail.

[0103] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

Claims

1. An apparatus for preparing polyetheramine-modified waterborne epoxy heavy-duty anti-corrosion coatings, applied to the preparation method of polyetheramine-modified waterborne epoxy heavy-duty anti-corrosion coatings, characterized in that: The polyetheramine-modified waterborne epoxy heavy-duty anti-corrosion coating comprises, by weight, 30-35 parts of modified bisphenol A epoxy resin, 3-8 parts of polyetheramine-modified waterborne epoxy resin, 0.7-1 parts of dispersant, 0.05-0.1 parts of defoamer, 15-20 parts of pigment, 5-10 parts of rust inhibitor, 7-20 parts of filler, 0.5-1 parts of flash rust inhibitor, 0.5-1 parts of polyurethane thickener, 0.1-0.3 parts of substrate wetting agent, 3-5 parts of dipropylene glycol butyl ether, and 10-15 parts of deionized water. The specific preparation steps are as follows: Modified bisphenol A epoxy resin, polyetheramine modified waterborne epoxy resin, dispersant, defoamer, pigment, rust inhibitor, filler, flash rust inhibitor, polyurethane thickener, substrate wetting agent, dipropylene glycol butyl ether, and deionized water are added to the preparation device and sequentially processed through paint preparation, dispersion, grinding, paint adjustment, testing, and packaging to obtain polyetheramine modified waterborne epoxy heavy-duty anti-corrosion coating; The preparation device includes a tank (1), a stirring rod (2), a first driving mechanism (3), and a pressing plate (6). The stirring rod (2) is vertically arranged inside the tank (1), and its top end extends through to the top of the tank (1). The first driving mechanism (3) is located at the top of the tank (1) and is used to drive the stirring rod (2) to rotate. The stirring rod (2) is provided with a pressing mechanism for pressing down and wetting the floating material on the liquid surface. The pressing mechanism includes a sleeve seat (4), an annular part (5) and a pressing plate (6). The sleeve seat (4) is fitted on the outside of the stirring rod (2), and the annular part (5) is located around the sleeve seat (4). A plurality of rotating shafts (51) are rotatably mounted in a ring array between the sleeve seat (4) and the annular part (5), and each of the rotating shafts (51) is fitted with a pressure plate (6), and a separation space (01) is formed between two adjacent pressure plates (6). The top of the tank (1) is provided with a lifting adjustment mechanism (7) for driving the material pressing mechanism to lift and adjust. The lifting adjustment mechanism (7) extends into the inner part of the tank (1) and is rotatably connected to the annular part (5). The stirring rod (2) is provided with a second driving mechanism (8), which is used to drive each of the pressing plates (6) to swing synchronously for adjustment; The pressure plate (6) is formed by a fixed connection between an upper plate strip (61) and a lower plate strip (62); The lower strip (62) is evenly distributed with through holes (63). The sleeve seat (4) is a variable diameter structure formed by fixing a small diameter part (41) and a large diameter part (42). The small diameter part (41) and the large diameter part (42) are coaxially slidably mounted on the stirring rod (2). Each of the aforementioned rotating shafts (51) is rotatably connected to the inner edge wall of the annular member (5), and the other end is rotatably connected to the large diameter portion (42) and extends through into the interior of the large diameter portion (42); The stirring rod (2) has a vertically extending keyway (201) on its outer wall, and a limiting key (411) is fixed on the inner wall of the small diameter part (41). The limiting key (411) is correspondingly limited and fitted into the keyway (201). The second drive mechanism (8) includes a gear (81), a rack (83) and a lifting device (84); Each of the rotating shafts (51) has a gear (81) fixed to its end located inside the large diameter portion (42). The lifting device (84) is located inside the stirring rod (2). A ring platform (82) is installed at the lower end of the lifting device (84). The lifting device (84) is used to drive the ring platform (82) to adjust its height. The lifting device (84) moves up and down synchronously with the large diameter part (42). The lower surface of the annular platform (82) is fixed with vertically extending racks (83) at positions corresponding to the gears (81), and each rack (83) meshes with each gear (81) in a one-to-one correspondence.

2. The apparatus for preparing a polyetheramine-modified waterborne epoxy heavy-duty anti-corrosion coating according to claim 1, characterized in that, The preparation method of the modified bisphenol A epoxy resin is as follows: Bisphenol A epoxy resin and ethylene glycol butyl ether are mixed evenly, heated and stirred, diethanolamine is added, the mixture is stirred and reacted, and then discharged.

3. The apparatus for preparing a polyetheramine-modified waterborne epoxy heavy-duty anti-corrosion coating according to claim 1, characterized in that, The preparation method of the polyetheramine modified waterborne epoxy resin: Bisphenol A epoxy resin and ethylene glycol butyl ether are mixed evenly, heated and stirred, polyetheramine is added, the mixture is stirred and reacted, and then discharged.

4. The apparatus for preparing a polyetheramine-modified waterborne epoxy heavy-duty anti-corrosion coating according to claim 1, characterized in that: The lifting device (84) includes a first drive motor (842), a screw (843), and an internal threaded sleeve (844). The stirring rod (2) has an inner mounting cavity (202) located above the keyway (201). The outer wall of the inner mounting cavity (202) has two symmetrical guide grooves A (203) and two symmetrical guide grooves B (204). The guide grooves A (203) and B (204) are connected to the inner mounting cavity (202). A connecting seat (841) is slidably installed in the inner mounting cavity (202). The first drive motor (842) is fixed on the connecting seat (841). A vertically downward threaded screw (843) is fixed on the output shaft of the first drive motor (842). The internal threaded sleeve (844) is threadedly fitted onto the screw (843). Two L-shaped arms B (846) are fixed on the outer peripheral wall of the connecting seat (841). After passing through the corresponding guide groove B (204), the two L-shaped arms B (846) are fixed to the top of the large diameter part (42). Two L-shaped arms A (845) are fixed on the outer peripheral wall of the internal threaded sleeve (844). After passing through the corresponding guide groove A (203), the two L-shaped arms A (845) are fixed to the top of the annular platform (82). The annular platform (82) is slidably fitted onto the two L-shaped arms B (846) through two sliding holes on it.

5. The apparatus for preparing a polyetheramine-modified waterborne epoxy heavy-duty anti-corrosion coating according to claim 1, characterized in that: The first drive mechanism (3) includes a drive motor (32) and a coupling (33); The top of the tank (1) is fixed with a mounting base (31), and the top end of the stirring rod (2) extends through into the mounting base (31); The drive motor (32) is fixed to the top of the mounting base (31), and the output shaft extends through into the mounting base (31); The coupling (33) is located inside the mounting base (31), and its output end is fixedly connected to the output shaft of the drive motor (32) and its output end is fixedly connected to the top of the stirring rod (2).

6. The apparatus for preparing a polyetheramine-modified waterborne epoxy heavy-duty anti-corrosion coating according to claim 1, characterized in that: The lifting adjustment mechanism (7) includes an electric push cylinder (72) and a ring seat (73); The top of the tank (1) is fixed with a bracket (71), and the electric push cylinder (72) is vertically fixed on the bracket (71); The ring seat (73) is located inside the tank body (1) at the periphery of the annular component (5); The telescopic rod of the electric push cylinder (72) extends through the tank body (1) and is fixedly connected to the ring seat (73); The ring seat (73) is rotatably connected to the ring member (5).

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