Preparation method and device of polyether amine modified waterborne epoxy heavy anti-corrosion coating

Abstract

The invention relates to the technical field of coating production, in particular to a preparation method and device of polyether amine modified waterborne epoxy heavy anti-corrosion coating. The polyether amine modified waterborne epoxy heavy anti-corrosion coating is prepared from the following ingredients in parts by mass: 30 to 35 parts of modified bisphenol A epoxy resin, 3 to 8 parts of polyether amine modified waterborne epoxy resin, 0.7 to 1 part of dispersing agents, 0.05 to 0.1 part of defoaming agents, 15 to 20 parts of pigments, 5 to 10 parts of anti-rust materials, 7 to 20 parts of filling materials, 0.5 to 1 part of flash rust prevention auxiliary agents, 0.5 to 1 part of polyurethane thickening agents and 0.1 to 0.3 part of base material wetting agents. 3 to 5 parts of dipropylene glycol butyl ether; and 10 to 15 parts of deionized water. The preparation method comprises the following steps: carrying out chemical modification on epoxy resin, carrying out chain extension by using diethanolamine to increase the flexibility of the epoxy resin so as to obtain modified bisphenol A epoxy resin, carrying out a reaction by using polyether amine so as to prepare polyether amine modified epoxy resin with an amphiphilic structure, adding an auxiliary agent, and carrying out full mixing so as to obtain the waterborne epoxy heavy anti-corrosion coating with excellent performance.

Description

Technical Field

[0001] The present invention relates to the technical field of coating production, and in particular to a method and device for preparing a polyetheramine modified waterborne epoxy heavy-duty anti-corrosion coating. Background Art

[0002] With the rapid development of industrialization and urbanization, the demand for high-performance anti-corrosion coatings is growing. Anti-corrosion coatings play a vital role in numerous applications, such as bridges, pipelines, storage tanks, industrial plants, and various metal structures. While traditional solvent-based epoxy coatings offer excellent corrosion protection, their high volatile organic compound emissions pose a serious threat to the environment and human health, and they do not meet modern environmental protection requirements. Therefore, developing a water-based epoxy anti-corrosion coating that combines excellent corrosion protection with environmental standards has become a research hotspot within the industry.

[0003] As an alternative to solvent-based coatings, waterborne epoxy coatings are gaining market favor due to their low VOC emissions, environmental friendliness, and ease of construction. However, conventional waterborne epoxy coatings still need improvement in corrosion resistance, weatherability, and flexibility, especially in heavy-duty applications, where performance requirements are even more stringent. Therefore, improving the overall performance of waterborne epoxy coatings through modification has become a pressing issue.

[0004] In addition, when using a traditional reactor to prepare the above-mentioned coating, since the coating formula 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 are easy to float on the liquid surface in the reactor. It takes a long time to stir and mix to eliminate the materials suspended on the liquid surface, which affects the material dispersion efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a method and device for preparing a polyetheramine modified waterborne epoxy heavy-duty anti-corrosion coating to solve the technical problems raised in the above background technology.

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

[0007] A method 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 a modified bisphenol A epoxy resin, 3-8 parts of a polyetheramine-modified waterborne epoxy resin, 0.7-1 part of a dispersant, 0.05-0.1 part of a defoamer, 15-20 parts of a pigment, 5-10 parts of an anti-rust material, 7-20 parts of a filler, 0.5-1 part of an anti-flash rust additive, 0.5-1 part of a polyurethane thickener, 0.1-0.3 part of a 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: adding modified bisphenol A epoxy resin, polyetheramine modified water-based epoxy resin, dispersant, defoaming agent, pigment, rust preventive material, filler, anti-flash rust additive, polyurethane thickener, substrate wetting agent, dipropylene glycol butyl ether and deionized water into a preparation device, and sequentially performing paint preparation, dispersion, grinding, paint adjustment, testing and packaging to obtain a polyetheramine modified water-based epoxy heavy-duty anti-corrosion coating.

[0008] Preferably, the preparation method of the modified bisphenol A epoxy resin is: uniformly mix bisphenol A epoxy resin and ethylene glycol butyl ether, heat and stir, add diethanolamine, stir to react, and discharge.

[0009] Preferably, the preparation method of the polyetheramine modified waterborne epoxy resin is as follows: bisphenol A epoxy resin and ethylene glycol butyl ether are uniformly mixed, heated and stirred, polyetheramine is added, stirred for reaction, and discharged.

[0010] The present invention also provides a preparation device for polyetheramine modified water-based epoxy heavy-duty anti-corrosion coating, comprising a tank body, a stirring rod, a first driving mechanism and a pressing plate, the stirring rod being vertically arranged in the tank body, and the top end extending through the tank body, the first driving mechanism being arranged on the top of the tank body for driving the stirring rod to rotate, and a pressing mechanism for pressing down and soaking the floating material on the liquid surface being arranged on the outside of the stirring rod, the pressing mechanism comprising a sleeve seat, an annular member and a pressing plate, the sleeve seat being sleeved on the outside of the stirring rod, the annular member being located on the periphery of the sleeve seat, and a plurality of rotating shafts being rotatably installed in an annular array between the sleeve seat and the annular member, each rotating shaft being sleeved with a pressing plate, and a separation space being formed between adjacent pressing plates, a lifting and adjusting mechanism for driving the pressing mechanism to lift and lower is provided on the top of the tank body, the lifting and adjusting mechanism extending to the inner part of the tank body and being rotatably connected to the annular member, a second driving mechanism being provided on the stirring rod, and the second driving mechanism being used to drive each pressing plate to swing synchronously for adjustment.

[0011] Preferably, the pressing plate is formed by a fixed connection between an upper plate and a lower plate, and the lower plate is evenly distributed with through holes.

[0012] Preferably, the sleeve seat is a variable diameter structure formed by a small diameter portion and a large diameter portion fixedly formed, and the small diameter portion and the large diameter portion are coaxially slidably mounted on the stirring rod, each rotating shaft is rotatably connected to the inner edge wall of the annular member, and the other end is correspondingly rotatably connected to the large diameter portion and extends through to the interior of the large diameter portion. A vertically extending keyway is provided on the outer wall of the stirring rod, and a limit key body is fixed on the inner wall of the small diameter portion, and the limit key body is correspondingly limit-clamped in the keyway.

[0013] Preferably, the second driving mechanism includes gears, racks and a lifting device. Gears are fixed on the ends of each rotating shaft located in the large diameter part. The lifting device is arranged in the stirring rod. An annular table is installed at the lower end of the lifting device. The lifting device is used to drive the annular table to perform lifting and adjustment, and the lifting device rises and falls synchronously with the large diameter part. Vertically extending racks are fixed on the lower surface of the annular table corresponding to the positions of each gear, and each rack is engaged with each gear one by one.

[0014] Preferably, the lifting device includes a first driving motor, a screw and an internal threaded sleeve, an inner mounting cavity is provided in the stirring rod above the keyway, 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 guide grooves B are both communicated with the inner mounting cavity, a connecting seat is slidably installed in the inner mounting cavity, the first driving motor is fixed on the connecting seat, a screw that passes vertically downward is fixed on the output shaft of the first driving motor, the internal threaded sleeve is threadedly mounted on the screw, two L-shaped arms B are fixed on the outer peripheral wall of the connecting seat, the two L-shaped arms B are fixed to the top of the large diameter part after passing through the corresponding guide grooves B, two L-shaped arms A are fixed on the outer peripheral wall of the internal threaded sleeve, the two L-shaped arms A are fixed to the top of the annular table after passing through the corresponding guide grooves A, and the annular table is slidably mounted on the two L-shaped arms B through two sliding holes thereon.

[0015] Preferably, the first driving mechanism includes a driving motor and a coupling, a mounting seat is fixed on the top of the tank body, the top of the stirring rod extends into the mounting seat, the driving motor is fixed on the top of the mounting seat, and the output shaft extends into the mounting seat, the coupling is arranged in the mounting seat, and the output end is fixedly connected to the output shaft of the driving motor, and the output end is fixedly connected to the top of the stirring rod.

[0016] 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 body. The electric push cylinder is vertically fixed on the bracket. The ring seat is arranged inside the tank body and is located on the periphery of the ring member. The telescopic rod of the electric push cylinder extends into the tank body and is fixedly connected to the ring seat. The ring seat is rotatably connected to the ring member.

[0017] Preferably, the top of the tank body has a feeding barrel, an observation port and several liquid material feeding ports, and the bottom of the tank body has a discharge port. The feeding barrel is inclined and has a reducing structure with a diameter that becomes smaller as it goes downwards. A material throwing mechanism is provided at the lower end of the feeding barrel and faces the material pressing mechanism. When the material pressing mechanism rotates with the stirring rod, the material throwing mechanism is aligned with each separation space in turn.

[0018] Preferably, the material throwing mechanism includes a rotating rod, a material receiving plate and a second driving motor. The rotating rod is rotatably installed on the feeding barrel and close to the lower port. The two ends of the rotating rod extend through and extend to both sides of the feeding barrel. Connecting arms are fixed on both outer ends of the rotating rod. The material 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 barrel. The second driving motor is fixed on the mounting bracket. The output shaft of the second driving motor is fixedly connected to one end of the rotating rod.

[0019] Compared with the prior art, the present invention has the following beneficial effects.

[0020] Single-component water-based epoxy resin has poor flexibility, so it is modified with ethylene glycol amine to extend the chain segments and improve the overall flexibility. Polyether amine partially reacts with the epoxy resin under heating conditions to ultimately obtain a mixture of addition product and excess unreacted epoxy resin. In the addition product, the hydrophilic polyether amine segment and the hydrophobic epoxy segment together constitute a typical surfactant structure, which can emulsify the unmodified epoxy resin without the aid of other external emulsifiers.

[0021] This preparation method adopts a modified bisphenol A epoxy resin and a polyetheramine modified water-based epoxy resin compound system, combined with non-ionic dispersants, rust-proof materials and other components. The coating prepared by scientific proportions has excellent corrosion resistance and weather resistance, and the water-based system has low VOC emissions, meeting environmental protection requirements.

[0022] The pressing mechanism of the preparation device, which is composed of a sleeve seat, annular member, and a pressing plate, can rotate with the stirring rod. The tilting and swinging of the pressing plate forces the floating material on the liquid surface into the liquid and drags it into the turbulent area, dynamically destroying the liquid surface structure and effectively accelerating the wetting and dispersion of the solid powder material. 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 in the inclined state, and use the holes to disturb the liquid surface and destroy the bubble membrane structure when in the vertical state, thus achieving both accelerated wetting and auxiliary defoaming functions. The pressing plate consists of an upper plate and a lower plate. The holes on the lower plate allow some material to flow through the holes when the pressing mechanism rotates forward. When the pressing mechanism rotates backward, the liquid flows through the back of the pressing plate to flush out the residual material, thus avoiding material accumulation and improving the mixing effect and raw material utilization rate. The material throwing mechanism at the lower port of the feeding barrel can be aligned with each separation space in turn when the pressing mechanism rotates. The powder material is evenly thrown into each separation space in turn through the reciprocating swing of the receiving plate. At the same time, the rotating rotating rod can disturb the material in the narrow part of the feeding barrel to prevent accumulation and blockage, thereby ensuring smooth feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic flow chart of the specific steps of the preparation method provided by the present invention; Figure 2 A schematic diagram of the overall structure of the preparation device provided by the present invention; Figure 3 Schematic diagram of the local internal structure of the tank body in the present invention; Figure 4 for Figure 2 The schematic diagram of the local structure shown; Figure 5 for Figure 2 The schematic diagram of the structure of the tank body and the outer surface components of the tank body is omitted; Figure 6 This is a schematic diagram of the installation of the pressing plate structure in the present invention; Figure 7 Schematic diagram of the lifting device structure of the present invention; Figure 8 for Figure 6 Schematic diagram of the cross section of the structure shown; Figure 9 for Figure 8 A schematic diagram of the structure at center A; Figure 10 Schematic diagram of the material throwing mechanism structure in the present invention; Figure 11 Schematic diagram of the detailed structure of the pressing plate in the present invention; Figure 12 Schematic diagram of the inclined arrangement of the pressing plate pressing down the powder material; Figure 13 This is a schematic diagram of the liquid material flushing press plate; Figure 14 Schematic diagram of defoaming with the pressing plate arranged vertically.

[0024] In the figure: 01, partition space; 1, tank body; 101, shell; 102, liquid inlet; 103, liquid outlet; 104, clamping chamber; 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, stirring blade; 3, first driving mechanism; 31, mounting seat; 32, driving motor; 33, coupling; 4, sleeve seat; 41, small diameter portion; 411, limit key body; 42, large diameter portion; 5, ring member ;51. Rotating shaft;6. Pressing plate;61. Upper slat;62. Lower slat;63. Hole;7. Lifting and adjusting mechanism;71. Bracket;72. Electric push cylinder;73. Ring seat;8. Second driving mechanism;81. Gear;82. Ring table;83. Rack;84. Lifting device;841. Connecting seat;842. First driving motor;843. Screw;844. Internal threaded sleeve;845. L-shaped arm A;846. L-shaped arm B;9. Material throwing mechanism;91. Rotating rod;92. Connecting arm;93. Receiving plate;94. Mounting frame;95. Second driving motor. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described below with reference to the accompanying drawings.

[0026] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection", and "installation" should be understood in a broad sense. 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. In addition, "communication" can be a direct connection or an indirect connection through an intermediate medium. Here, "fixed" means that the two are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present invention, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0027] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0028] In the embodiments of the present invention, "and / or" is simply a description of the association relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0029] References to "one embodiment" or "some embodiments" 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 present invention. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in 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 "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0030] Unless otherwise specified, the raw materials and reagents used in the present invention are commercially available or can be prepared by known methods.

[0031] Dispersant: BYK190 from Germany; Defoaming agent: German Digo 810w; Pigment: Anada rutile titanium dioxide R-318 or Shanghai Coking Plant C311 carbon black; Anti-rust material: zinc oxide; Filler: 800 mesh sericite powder, Chuzhou Baota Sericite Mining Co., Ltd. 1250 mesh talc powder, Anhui Gerui Chemical Co., Ltd. 1250 mesh precipitated barium sulfate, Changzhou Jingding Chemical Co., Ltd.; Anti-flash rust additive: Qingdao Enze Chemical Co., Ltd. CK35; Polyurethane thickener: Hemmings 299; Substrate wetting agent: German Digo additive-4100; Bisphenol A epoxy resin: 609 epoxy resin, Jiangsu Sanmu Chemical Co., Ltd. Polyetheramine: Huntsman polyetheramine M3085. Example 1

[0032] See also Figure 1 The present invention provides a method for preparing a polyetheramine modified waterborne epoxy heavy-duty anticorrosive coating. Figure 1 The following preparation process is performed: The ingredients of the polyetheramine modified waterborne epoxy heavy-duty anti-corrosion coating are calculated by weight and include 30 parts of modified bisphenol A epoxy resin, 5 parts of polyetheramine modified waterborne epoxy resin, 0.8 parts of dispersant, 0.1 parts of defoamer, 15 parts of pigment (C311 from Shanghai Coking Plant), 8 parts of anti-rust material, 10 parts of filler (1250 mesh talc powder, Anhui Ge Rui Chemical Co., Ltd.), 0.5 parts of anti-flash rust additive, 1 part of polyurethane thickener, 0.2 parts of substrate wetting agent, 4 parts of dipropylene glycol butyl ether and 15 parts of deionized water; The specific preparation steps are as follows: adding modified bisphenol A epoxy resin, polyetheramine modified water-based epoxy resin, dispersant, defoaming agent, pigment, rust preventive material, filler, anti-flash rust additive, polyurethane thickener, substrate wetting agent, dipropylene glycol butyl ether and deionized water into a preparation device, and sequentially performing paint preparation, dispersion, grinding, paint adjustment, testing and packaging to obtain a polyetheramine modified water-based epoxy heavy-duty anti-corrosion coating.

[0033] The preparation method of the modified bisphenol A epoxy resin is: 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 discharge.

[0034] The preparation method of the polyetheramine modified waterborne epoxy resin: 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 discharge.

[0035] Modified bisphenol A epoxy resin and polyetheramine-modified waterborne epoxy resin are used as base resins, along with dispersants, defoamers, pigments, anti-rust agents, fillers, anti-flash rust additives, polyurethane thickeners, substrate wetting agents, dipropylene glycol butyl ether, and deionized water. The dispersant ensures uniform dispersion of solid components such as the pigment and filler within the resin system. Additives such as the defoamer, anti-flash rust additive, thickener, and substrate wetting agent adjust the coating's leveling, anti-flash rust, and application properties. The strategically placed ratio of pigment and anti-rust agent further enhances the coating's anti-corrosion effectiveness, improves its application performance, and enhances film quality. The combination of modified bisphenol A epoxy resin and polyetheramine-modified waterborne epoxy resin significantly enhances the coating's corrosion and weather resistance, making it suitable for a variety of harsh environments.

[0036] This coating uses a water-based system, reducing the use of organic solvents and lowering environmental pollution. The pigment, rust-proofing agent, and filler are all environmentally friendly materials that meet modern environmental protection requirements. The product performance indicators (HG / T 4759-2014) of the coating prepared using the preparation method provided by the present invention are shown in Table 1: Table 1 Example 2

[0037] See also Figure 2-Figure 14 The present invention provides a preparation device for a polyetheramine-modified waterborne epoxy heavy-duty anti-corrosion coating, which is used to prepare the coating in Example 1. The preparation device includes a tank body 1, a stirring rod 2, a first drive mechanism 3, and a pressing plate 6. The top of the tank body 1 is provided with a feeding cylinder 11, an observation port 12, and a plurality of liquid material feeding ports 13. The feeding cylinder 11 is used for feeding solid materials, the observation port 12 is used for observing the internal stirring and dispersion conditions, and the liquid material feeding port 13 is provided with a valve for feeding liquid materials. The bottom of the tank body 1 is provided with a discharge port 14, and the discharge port 14 is provided with a valve for discharging the prepared coating. In addition, if Figure 2 and Figure 3 As shown, a shell sleeve 101 is further provided on the outside of the tank body 1, and a clamping cavity 104 is formed between the shell sleeve 101 and the tank body 1. A liquid inlet 102 communicating with the clamping cavity 104 is provided at the bottom of the shell sleeve 101, and a liquid outlet 103 communicating with the clamping cavity 104 is provided on the side of the shell sleeve 101. The heating phase is supplied into the clamping cavity 104 from the liquid inlet 102 to heat the tank body 1, and the heating phase in the clamping cavity 104 can also be discharged from the liquid outlet 103 to provide the required environmental heat conditions for the preparation.

[0038] The stirring rod 2 is vertically arranged in the tank body 1, and the top end extends through the tank body 1. The first driving mechanism 3 is arranged on the top of the tank body 1. Figure 3 and Figure 5As shown, the part of the stirring rod 2 located inside the tank body 1 is equipped with a stirring blade 21 and a stirring blade 22. The stirring rod 2 can be driven to rotate by the first driving mechanism 3. The rotating stirring rod 2 drives the stirring blade 21 and the stirring blade 22 to rotate. The rotating stirring blade 21 can stir, disperse and mix the material in the tank body 1. The rotating stirring blade 22 can stir the material from the bottom upward, so that the material settled at the bottom flows upward, avoiding excessive sedimentation of the material and uneven mixing.

[0039] A pressing mechanism for pressing the floating material on the liquid surface downward to wet it is provided on the outside of the stirring rod 2. The pressing mechanism includes a sleeve seat 4, an annular member 5 and a pressing plate 6. The sleeve seat 4 is sleeved on the outside of the stirring rod 2, and the annular member 5 is located on the periphery of the sleeve seat 4. A plurality of rotating shafts 51 are rotatably installed between the sleeve seat 4 and the annular member 5. A pressing plate 6 is sleeved on each rotating shaft 51. The rotating shaft 51 enables each pressing plate 6 to have the ability to rotate and adjust. In addition, a separation space 01 is formed between two adjacent pressing plates 6 to separate the powdered material to be put in. In addition, a lifting adjustment mechanism 7 for driving the lifting and lowering adjustment of the pressing mechanism is provided on the top of the tank body 1. The lifting adjustment mechanism 7 extends to the inner part of the tank body 1 and is rotatably connected to the annular member 5. A second driving mechanism 8 is provided on the stirring rod 2.

[0040] During the preparation process, liquid material is added into the tank body 1 from the liquid material feeding port 13, and solid or powder material is added into the tank body 1 through the feeding cylinder 11. The first driving mechanism 3 drives the stirring rod 2, the stirring blade 21 and the stirring blade 22 to rotate, so that the materials can be stirred and mixed. When solid and powder materials are added, each pressing plate 6 is driven to swing to an inclined state by the second driving mechanism 8, and the pressing structure is driven to perform corresponding lifting and adjusting by the lifting and adjusting mechanism 7 until half of the pressing plate 6 exceeds the liquid surface. Then, the pressing structure rotates forward along with the stirring rod 2, (6) which can break the powder layer floating on the liquid surface. The surface of the pressing plate 6 can be used to force the material floating on the liquid surface into the liquid and drag it to the turbulent area below, accelerating the wetting of the floating material, and continuously and dynamically destroying and updating the liquid surface structure during the rotation process, effectively improving the dispersion efficiency of the solid powder material. Example 3

[0041] See also Figure 11 The difference between this embodiment and embodiment 2 is that: The pressing plate 6 is formed by the upper plate 61 and the lower plate 62 fixedly connected. The lower plate 62 is evenly distributed with through holes 63. When the pressing plate 6 is adjusted to the tilted state and rotates forward with the stirring rod 2, Figure 12As shown in the figure, the solid arrow is the movement direction of the upper strip 61, and the dotted arrow is the movement direction of the fluid. Part 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 end of the lower strip 62 to the other side. This process allows the floating material to be immersed below the liquid surface and can be fully wetted, thereby effectively accelerating the mixing of the solid powder material.

[0042] When the solid powder material is added, part of the material will fall on the back of the pressing plate 6 away from the liquid surface. The first driving mechanism 3 drives the stirring rod 2 to drive the pressing mechanism to rotate in the opposite direction. Figure 13 As shown in the figure, the solid arrow is the movement direction of the pressing plate 6, and the dotted arrow is the flow direction of the liquid. Under the extrusion action, part of the liquid flows through the back of the pressing plate 6 and flows over the top of the pressing plate 6 to the other side. The material accumulated on the back of the pressing plate 6 can be flushed into the liquid for mixing, avoiding the accumulation of residual material on the back of the pressing plate 6.

[0043] After the floating materials on the liquid surface are immersed in the liquid, the second driving mechanism 8 drives each pressing plate 6 to swing and adjust to a vertical state, and the lifting and lowering adjustment mechanism 7 drives the pressing device to rise and fall accordingly until the liquid surface is at the hole 63, and the stirring rod 2 drives the pressing device to rotate, as shown in FIG. Figure 14 As shown in the figure, the solid arrow indicates the moving direction of the pressing plate 6, and the dotted arrow indicates the flow direction of the liquid and bubbles. The moving pressing plate 6 can impact and break the original structure of the liquid surface. At the same time, the bubbles and liquid pass through the holes 63, which has an additional defoaming effect.

[0044] In addition, when the pressing plate 6 is adjusted to a vertical state, the separation space 01 formed between two adjacent pressing plates 6 has the largest area, and the stirring and mixing conditions inside the tank body 1 can be easily observed through the observation port 12, thereby avoiding excessive obstruction of the observation field by the pressing plate 6. Example 4

[0045] See also Figure 6-Figure 9 The difference between this embodiment and embodiment 3 is that: The sleeve seat 4 is a variable diameter structure formed by 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 mounted on the stirring rod 2. Each rotating shaft 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 the interior of the large diameter portion 42. A vertically extending key groove 201 is provided on the outer wall of the stirring rod 2, and a limit key body 411 is fixed on the inner wall of the small diameter portion 41. The limit key body 411 is correspondingly limited and clamped in the key groove 201. The limit key body 411 is matched with the key groove 201 to make the sleeve seat 4 only have the ability to slide up and down along the stirring rod 2, and then when the first driving mechanism 3 drives the stirring rod 2 to rotate, it can ensure that the pressing mechanism is driven to rotate synchronously.

[0046] like Figure 7-Figure 9As shown, the second driving mechanism 8 includes a gear 81, a rack 83 and a lifting device 84. A gear 81 is fixed to the end of each rotating shaft 51 located in the large diameter portion 42. The lifting device 84 is arranged in 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 perform lifting and adjustment, and the lifting device 84 rises and falls synchronously with the large diameter portion 42. Vertically extending racks 83 are fixed to the lower surface of the annular platform 82 at the corresponding positions of each gear 81, and each rack 83 is engaged with each gear 81 one by one.

[0047] Among them, the lifting device 84 includes a first drive motor 842, a screw 843 and an internal threaded sleeve 844. An inner mounting cavity 202 is provided in the stirring rod 2 above the keyway 201. Two symmetrical guide grooves A203 and two symmetrical guide grooves B204 are provided on the outer wall of the inner mounting cavity 202. The guide grooves A203 and the guide grooves B204 are both communicated with 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 screw 843 that passes vertically downward is fixed on the output shaft of the first drive motor 842. The internal threaded sleeve 844 is threadedly mounted on 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.

[0048] Two L-shaped arms A845 are fixed on the outer wall of the internal threaded sleeve 844. After passing through the corresponding guide grooves A203, the two L-shaped arms A845 are fixed to the top of the annular platform 82. The annular platform 82 is slidably mounted on the two L-shaped arms B846 through two sliding holes thereon.

[0049] The specific principle of driving the pressing plate 6 to swing and adjust by the second driving mechanism 8 is as follows: The first drive motor 842 works, and its output shaft drives the screw 843 to rotate. The rotating screw 843 thread drives the internal threaded sleeve 844 to rise and fall, and under the fixed connection of the L-shaped arm A845, the annular table 82 and the rack 83 are driven to rise and fall synchronously; the rising and falling rack 83 can engage and drive the gear 81 to rotate, and the rotating gear 81 drives the rotating shaft 51 and the pressing plate 6 to rotate, thereby realizing the angle adjustment of the pressing plate 6.

[0050] The L-shaped arm B846 slides through the sliding hole on the annular platform 82, playing a limiting and guiding role, ensuring that the lifting of the annular platform 82 is smoother and more stable. Example 5

[0051] Please refer to the figure Figure 4 and Figure 5 The difference between this embodiment and embodiment 4 is that: The first driving mechanism 3 includes a driving motor 32 and a coupling 33. A mounting seat 31 is fixed to the top of the tank body 1. The top of the stirring rod 2 extends through the mounting seat 31. The driving motor 32 is fixed to the top of the mounting seat 31, and the output shaft extends through the mounting seat 31. The coupling 33 is arranged in the mounting seat 31, and the output end is fixedly connected to the output shaft of the driving motor 32, and the output end is fixedly connected to the top of the stirring rod 2. When the driving motor 32 works, its output shaft can drive the stirring rod 2 to rotate under the coupling transmission action of the rack 83, providing stable drive for the stirring action of the stirring rod 2. In addition, the driving motor 32 adopts existing technology and has forward and reverse functions. The specific structure and working principle will not be described in detail.

[0052] 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 arranged in the tank body 1 at the periphery of the ring member 5. The telescopic rod of the electric push cylinder 72 extends into 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.

[0053] Specifically, the cross-section of the ring seat 73 is a horizontal U-shape, and the cross-section of the ring member 5 is a horizontal T-shape. The protrusion of the ring member 5 is matched and rotated to be clamped in the concave part of the ring seat 73, so that the ring seat 73 and the ring member 5 can be adaptively rotated and connected.

[0054] Through the extension and retraction of the electric push cylinder 72, its extension end can drive the ring seat 73 and the ring member 5 to rise and fall synchronously, and then drive the rotating shaft 51, the pressing plate 6, the sleeve seat 4 and the second driving mechanism 8 to rise and fall synchronously, providing stable drive for the lifting and lowering adjustment of the pressing mechanism. Example 6

[0055] See also Figure 3 、 Figure 4 and Figure 10 The difference between this embodiment and embodiment 5 is that: Specifically, the feeding barrel 11 is inclined and has a reducing structure with a diameter that becomes smaller as it goes downwards. A material throwing mechanism 9 is provided at the lower end of the feeding barrel 11 and faces the pressing mechanism. When the pressing mechanism rotates following the stirring rod 2, the material throwing mechanism 9 is aligned with each separation space 01 in turn. When the pressing mechanism rotates until the material throwing mechanism 9 is aligned with a certain separation space 01, the receiving plate 93 feeds material into the space.

[0056] like Figure 10As shown, the material throwing mechanism 9 includes a rotating rod 91, a material receiving plate 93 and a second drive motor 95. The rotating rod 91 is rotatably installed on the feeding barrel 11 and close to the lower port. The two ends of the rotating rod 91 extend through the two sides of the feeding barrel 11 respectively. Connecting arms 92 are fixed on both outer ends of the rotating rod 91. The material 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 barrel 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.

[0057] The fixed powder material fed through the feeding barrel 11 is discharged through the lower port of the feeding barrel 11 and falls onto the receiving plate 93. The second driving motor 95 drives the rotating rod 91 to rotate forward and reverse. Under the connection of the connecting arm 92, the two sides of the receiving plate 93 are driven to swing back and forth. Under the action of inertia, the material can be thrown into each separation space 01, effectively ensuring that the fixed powder material falling into each separation space 01 is evenly distributed, avoiding excessive accumulation and affecting the mixing effect, and further improving the preparation quality.

[0058] In addition, since the inner diameter of the feeding barrel 11 is the smallest at the bottom, the material is prone to accumulation and bridging and blockage when passing through this area. The rotating rod 91 passes across the inside of the feeding barrel 11. When the second drive motor 95 drives the rotating rod 91 to rotate forward and reverse, the rotating rod 91 rotates in the feeding barrel 11, which can dynamically change the internal material accumulation structure, thereby effectively avoiding the accumulation and blockage of materials in narrow places, improving the smoothness of material flow and the stability of equipment operation. The rotating rod 91 serves as both a transmission part for the rotation of the receiving plate 93 and a disturbance part to prevent material accumulation and blockage, killing two birds with one stone.

[0059] It is worth noting that the first drive motor 842 and the second drive motor 95 in this application are both waterproof and high temperature resistant motors to cope with the high temperature and high humidity working environment in the tank body 1. In addition, the control method of the present invention is automatic control through a controller, and the control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field, so the present invention will no longer explain the control method and circuit connection in detail.

[0060] 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. A method for preparing a polyetheramine modified waterborne epoxy heavy-duty anticorrosive coating, characterized in that: The ingredients of the polyetheramine modified waterborne epoxy heavy-duty anti-corrosion coating are calculated by weight and include 30-35 parts of modified bisphenol A epoxy resin, 3-8 parts of polyetheramine modified waterborne epoxy resin, 0.7-1 part of dispersant, 0.05-0.1 part of defoamer, 15-20 parts of pigment, 5-10 parts of rust preventive material, 7-20 parts of filler, 0.5-1 part of anti-flash rust additive, 0.5-1 part of polyurethane thickener, 0.1-0.3 part 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: adding modified bisphenol A epoxy resin, polyetheramine modified water-based epoxy resin, dispersant, defoaming agent, pigment, rust preventive material, filler, anti-flash rust additive, polyurethane thickener, substrate wetting agent, dipropylene glycol butyl ether and deionized water into a preparation device, and sequentially performing paint preparation, dispersion, grinding, paint adjustment, testing and packaging to obtain a polyetheramine modified water-based epoxy heavy-duty anti-corrosion coating.

2. The method for preparing a polyetheramine modified waterborne epoxy heavy-duty anticorrosive coating according to claim 1, characterized in that: The preparation method of the modified bisphenol A epoxy resin is: Mix bisphenol A epoxy resin and ethylene glycol butyl ether evenly, heat and stir, add diethanolamine, stir to react, and discharge.

3. The method for preparing a polyetheramine modified waterborne epoxy heavy-duty anticorrosive coating according to claim 1, characterized in that: The preparation method of the polyetheramine modified waterborne epoxy resin: Mix bisphenol A epoxy resin and ethylene glycol butyl ether evenly, heat and stir, add polyetheramine, stir to react, and discharge.

4. A device for preparing a polyetheramine-modified waterborne epoxy heavy-duty anticorrosive coating, applied to the method for preparing the polyetheramine-modified waterborne epoxy heavy-duty anticorrosive coating according to claim 1, characterized in that: It comprises a tank body (1), a stirring rod (2), a first driving mechanism (3) and a pressing plate (6); The stirring rod (2) is vertically arranged in the tank body (1), and the top end extends through the tank body (1) to the top of the tank body (1); the first driving mechanism (3) is arranged on the top of the tank body (1) and is used to drive the stirring rod (2) to rotate; The stirring rod (2) is provided with a material pressing mechanism for pressing down and soaking the floating material on the liquid surface, the material pressing mechanism comprising a sleeve seat (4), an annular member (5) and a material pressing plate (6), the sleeve seat (4) is sleeved on the outside of the stirring rod (2), and the annular member (5) is located on the periphery of the sleeve seat (4); A plurality of rotating shafts (51) are rotatably mounted in an annular array between the sleeve seat (4) and the annular member (5), each of the rotating shafts (51) is fitted with a pressing plate (6), and a separation space (01) is formed between two adjacent pressing plates (6); The top of the tank body (1) is provided with a lifting and adjusting mechanism (7) for driving the pressing mechanism to lift and adjust, and the lifting and adjusting mechanism (7) extends to the inner part of the tank body (1) and is rotatably connected to the annular member (5); The stirring rod (2) is provided with a second driving mechanism (8), and the second driving mechanism (8) is used to drive each of the pressing plates (6) to swing and adjust synchronously.

5. The device for preparing a polyetheramine modified waterborne epoxy heavy-duty anticorrosive coating according to claim 4, characterized in that: The pressing plate (6) is formed by a fixed connection between an upper plate (61) and a lower plate (62); The lower slats (62) are evenly distributed with through holes (63).

6. The device for preparing a polyetheramine modified waterborne epoxy heavy-duty anticorrosive coating according to claim 4, characterized in that: The sleeve seat (4) is a variable diameter structure formed by fixing a small diameter portion (41) and a large diameter portion (42), and the small diameter portion (41) and the large diameter portion (42) are coaxially slidably sleeved on the stirring rod (2); Each of the rotating shafts (51) is rotatably connected to the inner edge wall of the annular member (5), and the other end is correspondingly rotatably connected to the large diameter portion (42) and extends through the interior of the large diameter portion (42); A vertically extending keyway (201) is provided on the outer wall of the stirring rod (2), and a limit key body (411) is fixed on the inner wall of the small-diameter portion (41), and the limit key body (411) is correspondingly fixed in the keyway (201).

7. The device for preparing a polyetheramine modified waterborne epoxy heavy-duty anticorrosive coating according to claim 6, characterized in that: The second driving mechanism (8) comprises a gear (81), a rack (83) and a lifting device (84); The gear (81) is fixed to the end of each rotating shaft (51) located inside the large diameter portion (42); The lifting device (84) is arranged in the stirring rod (2), and 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 perform lifting and lowering adjustment, and the lifting device (84) rises and falls synchronously with the large diameter portion (42); The lower surface of the annular platform (82) is fixed with a vertically extending rack (83) at a position corresponding to each gear (81), and each rack (83) is meshed with each gear (81) in a one-to-one correspondence.

8. The device for preparing a polyetheramine modified waterborne epoxy heavy-duty anticorrosive coating according to claim 7, characterized in that: The lifting device (84) includes a first drive motor (842), a screw (843), and an internally threaded sleeve (844); An inner mounting cavity (202) is provided above the keyway (201) in the stirring rod (2), and two symmetrical guide grooves A (203) and two symmetrical guide grooves B (204) are provided on the outer wall of the inner mounting cavity (202), and the guide grooves A (203) and the guide grooves B (204) are both in communication with the inner mounting cavity (202); A connecting seat (841) is slidably mounted in the inner mounting cavity (202), the first drive motor (842) is fixed on the connecting seat (841), a screw rod (843) vertically penetrating downward is fixed on the output shaft of the first drive motor (842), and the internal threaded sleeve (844) is thread-matched and sleeved on the screw rod (843); Two L-shaped arms B (846) are fixed on the outer peripheral wall of the connecting seat (841), and the two L-shaped arms B (846) are fixed to the top end of the large diameter portion (42) after passing through the corresponding guide grooves B (204); Two L-shaped arms A (845) are fixed on the outer peripheral wall of the internally threaded sleeve (844), and the two L-shaped arms A (845) are fixed to the top of the annular platform (82) after passing through the corresponding guide grooves A (203); The annular platform (82) is slidably mounted on the two L-shaped arms B (846) through two sliding holes thereon.

9. The device for preparing a polyetheramine modified waterborne epoxy heavy-duty anticorrosive coating according to claim 7, characterized in that: The first driving mechanism (3) comprises a driving motor (32) and a coupling (33); A mounting seat (31) is fixed to the top of the tank body (1), and the top end of the stirring rod (2) extends through the mounting seat (31); The driving motor (32) is fixed on the top of the mounting seat (31), and the output shaft extends through the mounting seat (31); The coupling (33) is disposed in the mounting seat (31), and the output end is fixedly connected to the output shaft of the drive motor (32), and the output end is fixedly connected to the top end of the stirring rod (2).

10. The device for preparing a polyetheramine modified waterborne epoxy heavy-duty anti-corrosion coating according to claim 4, characterized in that: The lifting and adjusting mechanism (7) comprises an electric push cylinder (72) and a ring seat (73); A bracket (71) is fixed on the top of the tank body (1), and the electric push cylinder (72) is vertically fixed on the bracket (71); The ring seat (73) is arranged inside the tank body (1) and at the periphery of the ring member (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).

Images