Preparation process and preparation device of epoxy resin curing agent

Abstract

The preparation process comprises the following steps: A1, adding 500g of carboxy nitrile rubber into 500g of boron phenolic aldehyde THC-400 blocks, putting the mixture into a stainless steel plate, putting the stainless steel plate into a drying oven, heating at 150 DEG C, uniformly mixing with a stainless steel rod after boron phenolic aldehyde is melted, uniformly stirring once every half an hour, heating to 2.5 hours, taking out, and cooling; a2, after cooling, breaking into small pieces to obtain coarse powder again; a3, weighing the obtained coarse powder, loading the weighed coarse powder into a plastic barrel, adding ethyl acetate with the same weight, soaking, uniformly shaking, covering and sealing, and uniformly shaking the barrel again on the next day; and A4, when white paste is generated at the bottom of the barrel, the upper layer of the solution in the barrel is gently poured out for use, the white paste left at the bottom of the barrel is collected and then loaded, and the white paste is an epoxy resin curing agent. According to the invention, carboxyl nitrile rubber and ethyl acetate are added for chemical reaction and processing, so that the epoxy resin does not generate solid combustion.

Description

Technical Field

[0001] This invention mainly relates to the field of resin material technology, specifically to a process and apparatus for preparing an epoxy resin curing agent. Background Technology

[0002] The epoxy resin curing agent preparation process involves a chemical reaction of the epoxy resin to form a network of three-dimensional polymers, encapsulating the composite material's aggregate within the network. This process transforms linear resin into a tough, three-dimensional solid. Epoxy resin is a beneficial resin that offers the advantage of easily obtaining robust molded bodies, and it is used as a monomer resin and in composite materials. Its applications are wide-ranging due to its excellent properties, including dental materials, various structural materials, LED sealing materials, adhesives, and coatings containing hard coatings, among other uses.

[0003] However, existing epoxy resins are highly flammable and their cured products are brittle, which cannot meet the requirements of their application fields. Therefore, how to improve the flame retardancy of epoxy resins has become an urgent technical problem to be solved. Summary of the Invention

[0004] The present invention mainly provides a device to solve the technical problems mentioned in the background art.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0006] A process for preparing an epoxy resin curing agent, the process comprising:

[0007] A1: Use 500g of boron phenolic THC-400 block, add 500g of carboxylated nitrile rubber, put it into a stainless steel pan and place it in an oven, heat at 150℃, after the boron phenolic resin melts, stir it with a stainless steel rod, stir it once every half hour, heat for 2.5 hours, take it out and cool it.

[0008] A2: After cooling, crush the small pieces and then grind them into coarse powder again using a pulverizer;

[0009] A3: Weigh the obtained coarse powder, put it into a plastic bucket, add an equal weight of ethyl acetate to soak and shake well, then seal the bucket. The next day, shake the bucket well again.

[0010] A4: After three days of dissolution, a white precipitate will appear at the bottom. On the fifth day, gently pour out the top layer of the solution in this bucket and use it separately. Collect the white paste remaining at the bottom of the bucket and store it separately. This white paste is epoxy resin curing agent.

[0011] Preferably, the white paste contains THC-400 boron phenolic resin and B2O3 inorganic substances produced by hydrolysis.

[0012] Preferably, the plastic bucket is mounted on a workbench, which is also equipped with a rotating mechanism and a tilting mechanism. One end of the plastic bucket is connected to the rotating mechanism, and the other end of the plastic bucket is connected to the tilting mechanism.

[0013] Preferably, the plastic bucket includes a lid, an upper body, and a lower body, wherein the lid is threadedly connected to the upper body, and the upper body is threadedly connected to the lower body.

[0014] Preferably, the top of the bucket lid is provided with a handle.

[0015] Preferably, the rotating mechanism includes a motor, a rotating shaft, and a flat key. The motor is mounted on a support rod at the top of the workbench. The output end of the motor is connected to one end of the rotating shaft, and the other end of the rotating shaft is connected to the flat key. The flat key is connected to the bucket lid via a slide rod.

[0016] Preferably, the flat key has a strip-shaped hole that passes through the flat key, and a slide rod is provided inside the strip-shaped hole. One end of the slide rod is connected to the bottom of a fixing plate, and the fixing plate is positioned above the flat key. The diameter of the fixing plate is larger than the width of the strip-shaped hole, and the other end of the slide rod is threaded to the bucket lid.

[0017] Preferably, the tilting mechanism includes a hydraulic cylinder, a connecting rod, and a support plate. The bottom of the workbench is provided with a groove. The two ends of the connecting rod are connected to the two sides of the groove. The hydraulic cylinder is hinged to the connecting rod. The output end of the hydraulic cylinder is hinged to the bottom of the support plate. One end of the support plate is hinged to the workbench. The support plate is connected to the plastic bucket.

[0018] Preferably, one end of the support plate is provided with a movable rod, both ends of the movable rod are connected to a support frame, one end of the support frame is connected to the movable rod, and the other end of the support frame is hinged to the bottom of the workbench.

[0019] Preferably, the top of the support plate is provided with a spherical connector, which includes an upper base plate, a lower base plate, a spherical block, and a spherical cover. The bottom of the lower base plate is connected to the support plate, the spherical block is placed on the top of the lower base plate, the top of the spherical cover is connected to the bottom of the upper base plate, the spherical cover covers the spherical block, and the top of the upper base plate is fixedly connected to the bottom of the lower barrel.

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

[0021] This invention utilizes a rotating mechanism, where a motor drives a rotating shaft, which in turn rotates a sliding rod and a plastic bucket, thus replacing manual labor in mixing coarse powder with ethyl acetate.

[0022] The present invention features a detachable plastic bucket that facilitates the removal of epoxy resin curing agent.

[0023] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0024] Figure 1 This is a process flow diagram of the epoxy resin curing agent preparation process and preparation apparatus of the present invention;

[0025] Figure 2 This is an isometric view of the epoxy resin curing agent preparation process and preparation apparatus of the present invention;

[0026] Figure 3 This is a schematic diagram of the rotating mechanism of the epoxy resin curing agent preparation process and preparation apparatus of the present invention.

[0027] Figure 4 This is a front view of the epoxy resin curing agent preparation process and preparation apparatus of the present invention;

[0028] Figure 5 This is a cross-sectional view of the spherical connector of the epoxy resin curing agent preparation process and preparation apparatus of the present invention.

[0029] Figure descriptions: 1. Workbench; 2. Plastic bucket; 21. Bucket lid; 211. Handle; 22. Upper bucket body; 23. Lower bucket body; 3. Rotating mechanism; 31. Motor; 32. Rotating shaft; 33. Flat key; 35. Slide rod; 36. Strip hole; 4. Tilting mechanism; 41. Hydraulic cylinder; 42. Connecting rod; 43. Support plate; 45. Movable rod; 46. Support frame; 5. Spherical connector; 51. Upper base plate; 52. Lower base plate; 53. Spherical block; 54. Spherical cover; 47. Fixing plate; 48. Bolt. Detailed Implementation

[0030] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0031] For an example, please refer to the appendix. Figure 1-5 As shown, the present invention provides a process for preparing an epoxy resin curing agent, the process comprising:

[0032] A1: Use 500g of boron phenolic THC-400 block, add 500g of carboxylated nitrile rubber, put it into a stainless steel pan and place it in an oven, heat at 150℃, after the boron phenolic resin melts, stir it with a stainless steel rod, stir it once every half hour, heat for 2.5 hours, take it out and cool it.

[0033] A2: After cooling, crush the small pieces and then grind them into coarse powder again using a pulverizer;

[0034] A3: Weigh the obtained coarse powder, put it into plastic bucket 2, add an equal weight of ethyl acetate to soak and shake well, then seal the bucket. The next day, shake the bucket well again.

[0035] A4: After three days of dissolution, a white precipitate appears at the bottom. On the fifth day, gently pour off the top layer of solution from the container and reuse it. Collect the remaining white paste at the bottom of the container and store it separately. This white paste is an epoxy resin curing agent. The white paste contains THC-400 boron phenolic resin and B2O3 inorganic substances produced by hydrolysis.

[0036] Please refer to the appendix carefully. Figure 2 As shown, the plastic bucket 2 is set on the workbench 1, and the workbench 1 is also equipped with a rotating mechanism 3 and a tilting mechanism 4. One end of the plastic bucket 2 is connected to the rotating mechanism 3, and the other end of the plastic bucket 2 is connected to the tilting mechanism 4.

[0037] Please refer to the appendix carefully. Figure 4 As shown, the plastic bucket 2 includes a lid 21, an upper body 22, and a lower body 23. The lid 21 is threadedly connected to the upper body 22. Separating the lid 21 facilitates the pouring out and storage of the upper layer solution in the bucket. The upper body 22 is threadedly connected to the lower body 23. Separating the lower body 23 facilitates the removal of the epoxy resin curing agent.

[0038] Please refer to the appendix carefully. Figure 4 As shown, the upper end of the bucket lid 21 is provided with a handle 211, which facilitates opening the bucket lid 21 to pour the coarse powder and ethyl acetate into the bucket.

[0039] Please refer to the appendix carefully. Figure 3 As shown, the rotating mechanism 3 includes a motor 31, a rotating shaft 32, and a flat key 33. The motor 31 is mounted on the top support rod 11 of the workbench 1. The output end of the motor 31 is connected to one end of the rotating shaft 32, and the other end of the rotating shaft 32 is connected to the flat key 33. The flat key 33 is connected to the barrel lid 21 via a slide rod 35. The flat key 33 has a slotted hole 36 that passes through it. The slide rod 35 is installed inside the slotted hole 36. One end of the slide rod 35 is connected to the bottom of a fixing plate 34, which is positioned above the flat key 33. The diameter of the fixing plate 34 is larger than the width of the slotted hole 36. The other end of the slide rod 35 is threadedly connected to the barrel lid 21. The cooperation of the rotating mechanism 3 and the slide rod 35 can shake the coarse powder and ethyl acetate in the barrel evenly without manual operation. The slide rod 35 is cylindrical.

[0040] Please refer to the appendix carefully. Figure 2As shown, the tilting mechanism 4 includes a hydraulic cylinder 41, a connecting rod 42, and a support plate 43. A groove is provided at the bottom of the workbench 1. Both ends of the connecting rod 42 are connected to the sides of the groove. The hydraulic cylinder 41 is hinged to the connecting rod 42. The output end of the hydraulic cylinder 41 is hinged to the bottom of the support plate 43. One end of the support plate 43 is hinged to the workbench 1, and the support plate 43 is connected to the plastic bucket 2. A movable rod 45 is provided at one end of the support plate 43. Both ends of the movable rod 45 are connected to a support frame 46. One end of the support frame 46 is connected to the movable rod 45, and the other end of the support frame 46 is hinged to the bottom of the workbench 1. The tilting mechanism 4 tilts the plastic bucket 2 via the hydraulic cylinder 41, which facilitates the pouring out of the upper layer of liquid inside the plastic bucket 2.

[0041] Please refer to the appendix carefully. Figure 5 As shown, a spherical connector 5 is provided on the top of the support plate 43. The spherical connector 5 includes an upper base plate 51, a lower base plate 52, a spherical block 53, and a spherical cover 54. The bottom of the lower base plate 52 is connected to the support plate 43, the spherical block 53 is disposed on the top of the lower base plate 52, and the top of the spherical cover 54 is connected to the bottom of the upper base plate 51, covering the spherical block 53. The top of the upper base plate 51 is fixedly connected to the bottom of the lower barrel body 23. The spherical connector 5 prevents the coarse powder and ethyl acetate in the plastic barrel 2 from spilling during the shaking process.

[0042] Please refer to the appendix carefully. Figure 4 As shown, in some embodiments, a fixing plate 47 may also be provided on the plastic bucket 2, and a bolt 48 may also be provided on the fixing plate 47. In order to prevent the plastic bucket 2 from shaking when the liquid in the plastic bucket 2 is poured out, the bolt 48 is passed through the fixing plate 47 and connected to the support plate 43 to fix the plastic bucket 2.

[0043] The specific operation process of this invention is as follows:

[0044] Open the lid 21 (which consists of a fixed lid and a movable lid; the handle opens the movable lid, and the fixed lid is connected to the slide rod 35) using the handle 211, pour the coarse powder and ethyl acetate into the plastic bucket 2, then close the lid 21. Next, open the rotating mechanism 3 using the motor 31. The motor 31 drives the rotating shaft 32 to rotate, which in turn drives the flat key 33 to rotate, thereby rotating the connecting rod 42 and the plastic bucket 2. The spherical connector 5 controls the plastic bucket 2 to sway during rotation without tipping over. After the coarse powder and ethyl acetate in the plastic bucket 2 are evenly mixed, turn off the motor 31 to stop the shaking. The next day, the motor 31 is turned on again to shake the coarse powder and ethyl acetate in the plastic bucket 2 evenly. Then the motor 31 is turned off to stop shaking and the bucket remains still. After a white paste is produced in the plastic bucket 2, the bucket lid 21 is separated from the upper bucket body 22. The support plate 43 and the fixing plate 47 are then connected by bolts 48 to fix the plastic bucket 2. The hydraulic cylinder 41 of the tilting mechanism 4 is used to tilt the support plate 43, thereby causing the plastic bucket 2 to tilt. The upper liquid in the plastic bucket 2 can then be poured out and stored separately. After the liquid is poured out, the support plate 43 is reset, and the lower bucket body 23 is disassembled to collect the epoxy resin curing agent in the lower bucket body 23.

[0045] The present invention has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A process for preparing an epoxy resin curing agent, characterized in that: The process includes: A1: Use 500g of boron phenolic THC-400 block, add 500g of carboxylated nitrile rubber, put it into a stainless steel pan and place it in an oven, heat at 150℃, after the boron phenolic resin melts, stir it with a stainless steel rod, stir it once every half hour, heat for 2.5 hours, take it out and cool it. A2: After cooling, crush the small pieces and then grind them into coarse powder again using a pulverizer; A3: Weigh the obtained coarse powder, put it into a plastic bucket (2), add an equal weight of ethyl acetate to soak and shake well, then seal the bucket. The next day, shake the bucket well again. A4: After three days of dissolution, a white precipitate will appear at the bottom. On the fifth day, gently pour out the top layer of the solution in this bucket and use it separately. Collect the white paste remaining at the bottom of the bucket and store it separately. This white paste is epoxy resin curing agent.

2. The epoxy resin curing agent preparation process according to claim 1, characterized in that, The white paste contains THC-400 boron phenolic resin and B2O3 inorganic substances produced by hydrolysis.

3. An apparatus for preparing an epoxy resin curing agent, characterized in that: The device includes a plastic bucket (2) as described in any one of claims 1-2, the plastic bucket (2) being disposed on a workbench (1), the workbench (1) being further provided with a rotating mechanism (3) and a tilting mechanism (4), one end of the plastic bucket (2) being connected to the rotating mechanism (3), and the other end of the plastic bucket (2) being connected to the tilting mechanism (4).

4. The epoxy resin curing agent preparation apparatus according to claim 1, characterized in that, The plastic bucket (2) includes a lid (21), an upper body (22) and a lower body (23). The lid (21) is threaded to the upper body (22), and the upper body (22) is threaded to the lower body (23).

5. The epoxy resin curing agent preparation apparatus according to claim 1, characterized in that, The top of the bucket lid (21) is provided with a handle (211).

6. The epoxy resin curing agent preparation apparatus according to claim 1, characterized in that, The rotating mechanism (3) includes a motor (31), a rotating shaft (32), and a flat key (33). The motor (31) is mounted on the top support rod (11) of the workbench (1). The output end of the motor (31) is connected to one end of the rotating shaft (32), and the other end of the rotating shaft (32) is connected to the flat key (33). The flat key (33) is connected to the bucket lid (21) through a slide rod (35).

7. The epoxy resin curing agent preparation apparatus according to claim 6, characterized in that, The flat key (33) is provided with a strip hole (36) that passes through the flat key (33). A slide rod (35) is provided inside the strip hole (36). One end of the slide rod (35) is connected to the bottom of a fixing plate (34). The fixing plate (34) is located above the flat key (33). The diameter of the fixing plate (34) is larger than the width of the strip hole (36). The other end of the slide rod (35) is threaded to the bucket lid (21).

8. The epoxy resin curing agent preparation apparatus according to claim 1, characterized in that, The tilting mechanism (4) includes a hydraulic cylinder (41), a connecting rod (42), and a support plate (43). The bottom of the workbench (1) is provided with a groove. The two ends of the connecting rod (42) are connected to the two sides of the groove. The hydraulic cylinder (41) is hinged on the connecting rod (42). The output end of the hydraulic cylinder (41) is hinged to the bottom of the support plate (43). One end of the support plate (43) is hinged to the workbench (1). The support plate (43) is connected to the plastic bucket (2).

9. The epoxy resin curing agent preparation apparatus according to claim 8, characterized in that, One end of the support plate (43) is provided with a movable rod (45), and both ends of the movable rod (45) are connected to a support frame (46). One end of the support frame (46) is connected to the movable rod (45), and the other end of the support frame (46) is hinged to the bottom of the workbench (1).

10. The epoxy resin curing agent preparation apparatus according to claim 8, characterized in that, The top of the support plate (43) is provided with a spherical connector (5). The spherical connector (5) includes an upper base plate (51), a lower base plate (52), a ball block (53), and a ball cover (54). The bottom of the lower base plate (52) is connected to the support plate (43). The ball block (53) is set on the top of the lower base plate (52). The top of the ball cover (54) is connected to the bottom of the upper base plate (51). The ball cover (54) covers the ball block (53). The top of the upper base plate (51) is fixedly connected to the bottom of the lower barrel body (23).

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