Device for synthesizing high molecular weight polyacrylate adhesive

Abstract

The invention belongs to the technical field of polyacrylate adhesives, and particularly discloses a device for synthesizing a high-molecular-weight polyacrylate adhesive, which comprises a kettle body, a stirring shaft cooling system, a polymerization kettle cooling system and a heating and cooling integrated system, the kettle body and stirring shaft cooling system comprises a polymerization kettle body, a stirring paddle arranged in the polymerization kettle body and a stirring shaft temperature control system arranged above the polymerization kettle body, the polymerization kettle cooling system and the heating and cooling integrated system are both arranged outside the polymerization kettle body, the polymerization kettle cooling system is used for cooling the polymerization kettle body, and the heating and cooling integrated system is used for heating and cooling the polymerization kettle body. And the heating and cooling integrated system is used for heating or cooling the polymerization kettle body. According to the device for synthesizing the high-molecular-weight polyacrylate adhesive, the reaction process is more stable, the molecular weight of synthesized polyacrylate is high, the molecular weight distribution is narrow, and a polymerization method is relatively simple to implement.

Description

Technical Field

[0001] The invention belongs to the technical field of polyacrylate adhesives, and in particular relates to a device for synthesizing high molecular weight polyacrylate adhesives. Background Art

[0002] Polyacrylate pressure-sensitive adhesives are widely used in pressure-sensitive adhesive tapes, label papers, and the bonding of various optical films due to their excellent pressure-sensitive adhesive properties and good weather resistance. At the same time, with the rapid popularization of displays made of optical films in application scenarios with large changes in the use environment such as automobiles, the requirements for pressure-sensitive adhesives are gradually increasing. For example, in order to ensure that the optical film does not bubble, warp, shrink, bend, or even fall off when used under high temperature and high humidity, and to have anti-light leakage properties at high temperature or high temperature and high humidity, it is necessary to have excellent weather resistance. In addition, under certain special working conditions, such as when the optical film is bonded to the liquid crystal panel, if the bonding position deviates, the optical film needs to be able to be peeled off from the liquid crystal panel, and the bonding surface will not be contaminated during peeling.

[0003] As a pressure-sensitive adhesive for optical films that can meet the above performance requirements, its preparation method is as follows: high molecular weight polyacrylate polymer is mixed with a certain amount of medium and low molecular weight polyacrylate polymer, and then a cross-linking agent is added for cross-linking, and some other additives (such as silane coupling agent, etc.) are added. The pressure-sensitive adhesive is mainly obtained by cross-linking high molecular weight polyacrylate polymers to obtain sufficient cohesive force, so that it does not bubble or fall off under high temperature and high humidity. At the same time, the medium and low molecular weight polyacrylate polymers prevent components from leaking light.

[0004] The synthesis process of low molecular weight polyacrylate polymers is relatively mature, and there are many domestic market products. However, the products of high molecular weight polyacrylate are mostly concentrated in Japan and South Korea, and there are very few research reports on the synthesis method and equipment of high molecular weight pressure sensitive adhesive for polarizer in China. The traditional synthesis method of polyacrylate optical pressure-sensitive adhesive reported by Japan and South Korea, such as patent JP 5347115B2 and patent CN 1275984C, patent JP 5347115B2 mainly uses toluene, ethyl acetate and mixed solutions of different proportions thereof as solvents. For the convenience of temperature control, the temperature during synthesis is mostly above the boiling point of the solvent, and the heat taken away when the solvent boils is used to carry out reflux reaction. The molecular weight of the polyacrylate synthesized by this method is small, the weather resistance is poor, and the energy consumption is high; in patent CN 1275984C, critical carbon dioxide is used as a solvent for synthesis reaction. The molecular weight of the polyacrylate obtained by this method is high and the molecular weight distribution is narrow, but the synthesis conditions of this method are more harsh and dangerous (the pressure of the reaction system needs to be increased to 6-15MPa), and the production cost of this method is high. The synthesis of domestic polyacrylates, such as patent CN 104293249B, has been adjusted to adjust the addition method of the initiator, but the molecular weight of the synthesized polyacrylate is not given.

[0005] In addition, the above synthesis of polyacrylates does not explain the relevant amplification equipment, but only explores the pure synthesis method. However, for free radical polymerization, especially when polymerizing high molecular weight (Mw>1.5 million) polyacrylates, due to the high viscosity of the reaction system, heat dissipation is more difficult, and the polymerization process is prone to temperature rise, resulting in the synthesized polyacrylate having a small molecular weight, a wide molecular weight distribution, and even undesirable conditions such as explosion and gelation.

[0006] In the laboratory stage, due to the small amount of materials, the heat released is small. Appropriate changes in experimental conditions can make the reaction process relatively stable, and polyacrylates with higher molecular weight can be successfully synthesized. In the scale-up stage, due to the large amount of materials, the heat released during the polymerization process is large, and the reaction process is difficult to control. The general practice is to increase the reaction temperature to the boiling point of ethyl acetate or other mixed solvents, and use the evaporation process of the solvent to take away the reaction heat. However, the chain transfer constant of the solvent is large at high temperature, making it difficult to synthesize polyacrylates with high molecular weight and low molecular weight dispersion.

[0007] When synthesizing high molecular weight polyacrylate, the system viscosity is relatively large, which belongs to a high viscosity fluid system. When a high viscosity fluid is stirred, a climbing rod effect will occur, which is one of the manifestations of the viscoelasticity of polymers. For viscous fluids, due to the action of centrifugal force, the liquid surface will be concave; unlike viscous fluids, the polymer liquid contained in the container is a viscoelastic fluid. When this sample is placed in a rotor and rotated, it is not thrown to the vicinity of the container wall due to inertia, but surrounds the rod, and a "climbing rod" phenomenon occurs, which climbs up along the rod. This phenomenon is called the "Weisenberg effect", also known as the "axis wrapping" effect. The reason for this phenomenon is that this polymer material is elastic, and it is caused by the formation of anisotropic structures in the flow of polymer fluids. Specifically, when rotating, the elastic macromolecular chains will be oriented along the circumferential direction and tensile deformation will occur, thereby generating pressure toward the axis. The closer to the axis, the greater the shear rate, so the greater the normal stress, and correspondingly, the greater the elastic recovery force of the polymer chain, so that the liquid squeezes upward along the axis, and the climbing rod phenomenon occurs. The occurrence of the climbing rod effect will have a serious impact on the uniformity of the polymerization reaction of polymer materials and the quality of the products. Therefore, when polymerizing high molecular weight polyacrylates, as the reaction proceeds, the monomer conversion rate continues to increase, the system viscosity gradually increases, and the climbing rod phenomenon will occur. Since the polymerization reaction of polyacrylates is an exothermic reaction, when the polymer climbing rods gather near the stirring paddle shaft, the generated reaction heat cannot be dissipated through the reactor wall in time, which will cause the polyacrylate to gel and other undesirable conditions. Therefore, it is necessary to study stirring paddles suitable for high viscosity fluid systems.

[0008] Patent CN 106693745B discloses a multi-blade combined stirring device. Although its agitator greatly enhances the flow of fluid in a vertical reactor with a large height-to-diameter ratio, making it suitable for stirring fluid systems with high viscosity, when stirring fluids with extremely high viscosity, there is a dead zone around the fixed ring, which easily leads to uneven stirring.

[0009] Patent CN 203591753U discloses a frame-type agitator, which combines an anchor-type agitator, a frame-type agitator and a spiral-ribbon agitator, overcoming the defects of several agitators, combining the radial flow effect produced by the frame-type agitator with the axial flow effect produced by the spiral-ribbon agitator, and the flow field presents axial and radial crossover, so that the materials can be fully and evenly mixed. However, when the agitator is actually used in a high-viscosity fluid system, the material in the middle of the agitator shaft is prone to climbing the rod, resulting in poor heat transfer of the material in the middle in the radial direction. When performing some exothermic reactions, the material in the middle is prone to gelling and agglomeration. Summary of the invention

[0010] The purpose of the present invention is to overcome the problems of small molecular weight of synthesized polyacrylate, high risk factor of synthesis process and high cost in the prior art, and to provide a device for synthesizing high molecular weight polyacrylate adhesive, so that the reaction process is more stable, the molecular weight of the synthesized polyacrylate is high, the molecular weight distribution is narrow, and the polymerization method is relatively simple to implement.

[0011] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0012] The present invention provides a device for synthesizing a high molecular weight polyacrylate adhesive, comprising a kettle body and a stirring shaft cooling system, a polymerization kettle cooling system and a temperature-raising and cooling integrated system, wherein the kettle body and a stirring shaft cooling system comprises a polymerization kettle body, a stirring paddle arranged in the polymerization kettle body and a stirring shaft temperature control system arranged above the polymerization kettle body, the polymerization kettle cooling system and the temperature-raising and cooling integrated system are both arranged outside the polymerization kettle body, the polymerization kettle cooling system is used for cooling the polymerization kettle body, and the temperature-raising and cooling integrated system is used for heating or cooling the polymerization kettle body;

[0013] The stirring paddle comprises a stirring shaft and a main spiral blade arranged outside the stirring shaft, the stirring shaft is a hollow structure, a heat transfer medium inflow channel is arranged in the stirring shaft, and a heat transfer medium outflow channel is formed between the heat transfer medium inflow channel and the stirring shaft;

[0014] The stirring shaft temperature control system comprises a heat exchanger 1 and a connecting pump 1 connected to the outlet end of the heat exchanger 1 through a pipeline, the outlet end of the connecting pump 1 is connected to the heat transfer medium inflow channel through a pipeline, the outlet end of the heat transfer medium inflow channel is connected to the inlet end of the heat transfer medium outflow channel, and the outlet end of the heat transfer medium outflow channel is connected to the heat exchanger 1;

[0015] The main helical ribbon blade comprises two helical ribbons 1 and 2 which are helically arranged around the stirring shaft and have the same helical direction. The helical ribbon 1 and the helical ribbon 2 are centrally symmetrical about the axis of the stirring shaft.

[0016] Furthermore, a driving mechanism is provided at one end of the stirring shaft located outside the polymerization kettle body, and the driving mechanism is used to drive the stirring shaft to rotate.

[0017] Furthermore, a stirring shaft heat transfer medium temperature probe is provided on the pipeline between the heat transfer medium inflow channel and the connection pump 1;

[0018] The polymerization kettle body is also provided with a reactor temperature probe, and the reactor temperature probe is used to monitor the internal temperature of the polymerization kettle body.

[0019] Furthermore, a plurality of connecting pieces are provided on the outside of the stirring shaft, and two connecting pieces are provided on the same circumference of the stirring shaft, and the angle between the two connecting pieces on the same circumference of the stirring shaft is 180°;

[0020] The other ends of the two connecting pieces on the same circumference of the stirring shaft are respectively connected to the spiral belt 1 and the spiral belt 2.

[0021] Furthermore, a lower pressure plate is provided at the lower end of the spiral belt 1 and the spiral belt 2, and the other ends of the two lower pressure plates are connected.

[0022] Furthermore, the angle between the short side of the lower pressing plate and the horizontal plane is 0-90°;

[0023] The curvature of the long side of the lower pressing plate is consistent with the curvature of the bottom of the polymerization kettle body.

[0024] Furthermore, the polymerization kettle cooling system comprises a second heat exchanger, a first heat transfer medium storage tank and a second connection pump, wherein the inlet end of the second heat exchanger is connected to the polymerization kettle body through a pipeline, the outlet end of the second heat exchanger is connected to the first heat transfer medium storage tank through a pipeline, the outlet end of the first heat transfer medium storage tank is connected to the second connection pump through a pipeline, and the outlet end of the second connection pump is connected to the polymerization kettle body through a pipeline;

[0025] A heat transfer medium reflux control valve 1 is provided on the pipeline between the inlet end of the second heat exchanger and the polymerization kettle body;

[0026] A heat transfer medium inlet control valve 1 is provided on the pipeline connecting the outlet end of the second pump and the polymerization kettle body;

[0027] The polymerization kettle cooling system also includes a heat transfer medium circulation control valve and a circulation control pipeline.

[0028] Furthermore, the heat transfer medium circulation control valve 1 is arranged on the circulation control pipeline 1, one end of the circulation control pipeline 1 is connected to an end of the pipeline between the inlet end of the heat exchanger 2 and the polymerization kettle body close to the inlet end of the heat exchanger 2, and the other end of the circulation control pipeline 1 is connected to an end of the pipeline between the outlet end of the connecting pump 2 and the polymerization kettle body close to the outlet end of the connecting pump 2.

[0029] Furthermore, the temperature rise and fall integrated system comprises a cold and hot integrated machine, a heat transfer medium storage tank 2 and a connecting pump 3, the inlet end of the cold and hot integrated machine is connected to the polymerization kettle body through a pipeline, the outlet end of the cold and hot integrated machine is connected to the heat transfer medium storage tank 2 through a pipeline, the outlet end of the heat transfer medium storage tank 2 is connected to the connecting pump 3 through a pipeline, and the outlet end of the connecting pump 3 is connected to the polymerization kettle body through a pipeline;

[0030] A second heat transfer medium reflux control valve is provided on the pipeline between the inlet end of the hot and cold integrated machine and the polymerization kettle body;

[0031] A heat transfer medium inlet control valve 2 is provided on the pipeline between the outlet end of the connecting pump 3 and the polymerization kettle body;

[0032] The integrated temperature rise and fall system further comprises a second heat transfer medium circulation control valve and a second circulation control pipeline.

[0033] Furthermore, the heat transfer medium circulation control valve 2 is arranged on the circulation control pipe 2, one end of the circulation control pipe 2 is connected to the inlet end of the cold and hot integrated machine, and the other end of the circulation control pipe 2 is connected to the end of the pipe between the outlet end of the connecting pump 3 and the polymerization kettle body, close to the outlet end of the connecting pump 3.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. In view of the problems existing in the prior art such as small molecular weight of polyacrylate, high risk factor of synthesis process and high cost, the present invention provides a synthesis device which can stably synthesize high molecular weight polyacrylate adhesive, so that the reaction process is more stable, the molecular weight of the synthesized polyacrylate is high, the molecular weight distribution is narrow, and the polymerization method is relatively simple to implement.

[0036] 2. In the present invention, a polymerization kettle cooling system is provided, which is mainly used for rapidly cooling the polymerization kettle. When synthesizing high molecular weight polyacrylate, since the polymerization reaction is an exothermic reaction, a large amount of reaction heat will be generated during the polymerization. If the reaction heat is not removed in time, the polymerization reaction will be out of control, thereby failing to synthesize high molecular weight polyacrylate; a kettle body and stirring shaft cooling system is provided for carrying out the polymerization reaction. The kettle body is of jacketed design, which is convenient for the heat-conducting medium to heat and cool the polymerization kettle; at the same time, the stirring shaft is also of jacketed design, which increases the heat exchange area of ​​the polymerization kettle and can rapidly cool the reaction liquid gathered around the stirring paddle; in addition, the main spiral ribbon blades of the stirring paddle are of push-down design, which can effectively suppress the climbing behavior of the high viscosity kettle liquid and ensure that the material can effectively transfer heat and mass; a temperature-raising and cooling integrated system is provided for heating and cooling the polymerization kettle body, providing the required reaction temperature for the initial and later stages of the polymerization reaction, and working together with the polymerization kettle cooling system and the kettle body and stirring shaft cooling system to maintain temperature stability in the middle stage of the reaction.

[0037] 3. In the present invention, by quickly adjusting the temperature of the polymerization kettle in the middle of the reaction, the stability of the polymerization reaction can be improved. A stable reaction system is the key to synthesizing high molecular weight (1.5 million ≤ Mw ≤ 2.6 million) and low molecular weight distribution (Mw / Mn ≤ 2); in addition, the stirring paddle of the present invention can effectively take away the polymerization heat generated during the polymerization process. When the polymerized polyacrylate climbs the pole due to the increase in viscosity, the material is mainly concentrated near the stirring paddle, the material contact area at the kettle wall decreases, and the heat exchange efficiency decreases. At the same time, free radical polymerization is an exothermic reaction, and a large amount of polymers are concentrated around the stirring paddle. If the generated reaction heat cannot be quickly exported from the reaction system, the material will heat up rapidly, and undesirable phenomena such as implosion or gel will occur. Therefore, it is necessary to export the reaction heat in time during the reaction process, especially after the viscosity rises. The stirring paddle that can actively cool down the present invention can take away the reaction heat concentrated around the stirring paddle by actively cooling the stirring paddle shaft, so that the temperature of the reaction process is more stable and uniform, and a polyacrylate with a higher molecular weight and a narrower molecular weight distribution can be synthesized, and undesirable phenomena such as gel will not occur due to local overheating. At the same time, the push-down stirring paddle of the present invention can effectively suppress the climbing of the high-viscosity fluid system during the stirring process, and can effectively promote the overall flow of the kettle liquid, making the heat transfer and mass transfer of the high-viscosity fluid system more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0039] Figure 1 It is a schematic diagram of the structure of the present invention;

[0040] Figure 2 It is a structural schematic diagram of the kettle body and stirring shaft cooling system of the present invention;

[0041] Figure 3 is a cross-sectional view of a main spiral blade of a stirring paddle of the present invention;

[0042] Figure 4 is the angle between the short side of the lower pressure plate of the stirring paddle of the present invention and the horizontal plane;

[0043] Figure 5 It is the angle between the long side of the lower pressure plate of the stirring paddle of the present invention and the horizontal plane.

[0044] Among them, the drawings are marked as follows: 100, polymerization kettle cooling system; 200, kettle body and stirring shaft cooling system; 300, heating and cooling integrated system; 400, circulation control pipeline 1; 500, circulation control pipeline 2; 1, heat exchanger 2; 2, heat transfer medium reflux control valve 1; 3, heat transfer medium circulation control valve 1; 4, heat transfer medium inlet control valve 1; 5, connecting pump 2; 6, heat transfer medium storage tank 1; 7, polymerization kettle body; 8, stirring shaft heat transfer medium temperature probe; 9, connecting pump 1; 10, heat exchanger 1; 1 1. Stirring shaft; 12. Main spiral blade; 13. Lower pressure plate; 14. Reactor temperature probe; 15. Heat transfer medium reflux control valve 2; 16. Hot and cold all-in-one machine; 17. Heat transfer medium storage tank 2; 18. Connecting pump 3; 19. Heat transfer medium inlet control valve 2; 20. Heat transfer medium circulation control valve 2; 71. Stirring paddle; 72. Stirring shaft temperature control system; 111. Heat transfer medium inlet channel; 112. Heat transfer medium outflow channel; 121. Spiral belt 1; 122. Spiral belt 2; 113. Connecting piece. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0047] Through a large number of experiments, this research team found that the monomer concentration of the synthesized high molecular weight polyacrylate must be above 30%. If the monomer concentration is less than 30%, it is difficult to synthesize a polyacrylate with a high molecular weight due to the serious chain transfer to the solvent during polymerization; that is, when synthesizing high molecular weight polyacrylate, the monomer concentration of the system is high, so when the monomer conversion rate increases rapidly in the middle stage of polymerization and the viscosity of the system increases rapidly, it is easy to appear the rod climbing behavior. At this time, the kettle liquid is mainly concentrated near the stirring paddle shaft. At the same time, because the ordinary stirring paddle cannot play a heat dissipation effect, the kettle liquid temperature near the stirring paddle shaft will rise rapidly as the polymerization reaction proceeds. If the large amount of polymerization reaction heat generated near the stirring paddle is not removed in time at this time, the kettle liquid concentrated near the stirring paddle shaft will quickly turn into gel, and the kettle liquid in other areas near the stirring paddle shaft will also turn into gel, resulting in synthesis failure. Therefore, a synthesis device is needed that can not only suppress the rod climbing behavior of high viscosity fluids, but also effectively control the kettle liquid temperature near the stirring paddle shaft.

[0048] First, as Figure 1 to Figure 2 As shown, the present invention provides a device for synthesizing high molecular weight polyacrylate adhesive, including a kettle body and stirring shaft cooling system 200, a polymerization kettle cooling system 100 and a temperature rise and fall integrated system 300;

[0049] Specifically, the kettle body and stirring shaft cooling system 200 includes a polymerization kettle body 7, a stirring paddle 71 disposed in the polymerization kettle body 7, and a stirring shaft temperature control system 72 disposed above the polymerization kettle body 7, and the polymerization kettle cooling system 100 and the temperature rise and fall integrated system 300 are both disposed outside the polymerization kettle body 7;

[0050] The polymerization kettle body 7 is of jacketed design, which is convenient for the heat-conducting medium to heat up or cool down the polymerization kettle body 7. The polymerization kettle cooling system 100 is used to cool down the polymerization kettle body 7. The temperature-raising and lowering integrated system 300 is used to heat up or cool down the polymerization kettle body 7. The stirring shaft temperature control system 72 is used to control the temperature of the stirring paddle 71. Specifically:

[0051] The stirring paddle 71 includes a stirring shaft 11 and a main spiral blade 12 arranged outside the stirring shaft 11; the stirring shaft temperature control system 72 includes a heat exchanger 10 and a connecting pump 9 connected to the outlet end of the heat exchanger 10 through a pipeline;

[0052] The stirring shaft 11 also adopts a jacketed design, which increases the heat exchange area of ​​the polymerization kettle and can quickly cool down the reaction liquid gathered around the stirring paddle 71. Specifically, the stirring shaft 11 is a hollow structure, and a heat transfer medium inlet channel 111 is provided in the stirring shaft 11. A heat transfer medium outflow channel 112 is formed between the heat transfer medium inflow channel 111 and the stirring shaft 11. One end of the heat transfer medium inflow channel 111 is connected to the inlet end of the heat transfer medium outflow channel 112, and the other end of the heat transfer medium inflow channel 111 is connected to the connection pump 9 through a pipeline, and the outlet end of the heat transfer medium outflow channel 112 is connected to the heat exchanger 10;

[0053] A stirring shaft heat transfer medium temperature probe 8 is provided on the pipeline between the heat transfer medium inflow channel 111 and the connection pump 9, and the stirring shaft heat transfer medium temperature probe 8 is used to monitor the temperature in the heat transfer medium inflow channel 111; a reaction kettle temperature probe 14 is also provided on the polymerization kettle body 7, and the reaction kettle temperature probe 14 is used to monitor the internal temperature of the polymerization kettle body 7;

[0054] In actual use, the heat transfer medium is introduced into the stirring shaft 11 from the heat transfer medium inflow channel 111 at the center of the shaft, and flows out from the heat transfer medium outflow channel 112 outside the heat transfer medium inflow channel 111, thereby generating heat exchange with the polymerization kettle body 7; the advantage of this stirring structure is that the diameter of the stirring shaft 11 is increased, so that the contact area between the polymerized polyacrylate and the stirring shaft 11 is increased, that is, the heat exchange area of ​​the polymerization kettle body 7 is increased, so that the reaction heat can be quickly discharged from the reaction system;

[0055] In addition, through a large number of experiments, it is found that the stirring paddle 71 (using the stirring shaft temperature control system 72 for temperature control) of the present invention that can actively cool down is used. For different reaction stages, the set temperature is different. In the early stage of the reaction, the temperature of the heat transfer medium of the stirring paddle 71 can be set to be the same as the temperature in the polymerization kettle body 7. When the temperature in the polymerization kettle body 7 rises by 0.1 to 3°C, the temperature of the heat transfer medium of the stirring paddle 71 is set to 5 to 30°C, preferably 8 to 20°C, which is lower than the temperature required for the reaction. If the temperature is set too high, that is, the temperature difference between the temperature in the stirring shaft 11 and the temperature in the polymerization kettle body 7 is too small, the cooling effect is not obvious; if the temperature is set too low, the cooling effect will be too strong, causing the temperature in the polymerization kettle body 7 to be lower than the temperature required for the reaction;

[0056] The main spiral blade 12 includes two spiral belts 121 and 122 which are spirally arranged around the stirring shaft 11 and have the same spiral direction. The spiral belt 121 and the spiral belt 122 are centrally symmetrical about the axis of the stirring shaft 11.

[0057] A plurality of connecting pieces 113 are provided on the outside of the stirring shaft 11. Two connecting pieces 113 are provided on the same circumference of the stirring shaft 11. The angle between the two connecting pieces 113 on the same circumference of the stirring shaft 11 is 180°. The other ends of the two connecting pieces 113 on the same circumference of the stirring shaft 11 are connected to the spiral belt 1 121 and the spiral belt 2 122 respectively.

[0058] Among them, the spiral belt 1 121 and the spiral belt 2 122 are of push-down design, which can effectively suppress the climbing behavior of the high-viscosity kettle liquid and ensure that the material can be effectively transferred to heat and mass;

[0059] The ratio of the diameter of the spiral band 1 121 and the spiral band 2 122 (i.e., the width of the space inside the spiral line formed by the spiral band 1 121 and the spiral band 2 122, usually measured by the distance between the central axis of the spiral line and the outer edge) to the diameter of the inner wall of the polymerization vessel body 7 is between 0.9-0.99, and the ratio of the pitch of the spiral band 1 121 and the spiral band 2 122 to the diameter of the stirring paddle 71 is between 0.5-2.5;

[0060] like Figure 3 As shown, the spiral belt 1 121 and the spiral belt 2 122 are turned outward on the basis of the spiral belt, and form an angle (a) with the extension line of the diameter direction of the stirring shaft 11. The existence of this angle makes the stirring paddle 71 exert an outward force on the fluid in addition to exerting a downward pressure on the fluid when stirring the fluid, so that the pressure toward the axis generated by the elastic restoring force of the polymer chain when the high-concentration fluid is stirred can be effectively suppressed, so that the climbing of the high-viscosity fluid can be greatly suppressed;

[0061] Preferably, in the above-mentioned stirring paddle suitable for high-viscosity fluid system, the range of angle (a) is greater than 0° and less than 90°; the range of angle (a) is further preferably greater than 20° and less than 70°;

[0062] After the spiral ribbon 1 121 and the spiral ribbon 2 122 are straightened, their cross-sections are in the shape of a right triangle or a similar triangle structure, which helps the overall stability of the stirring paddle and makes the spiral ribbon less likely to deform;

[0063] The polymerization kettle cooling system 100 comprises a heat exchanger 1, a heat transfer medium storage tank 6 and a connecting pump 5. The inlet end of the heat exchanger 1 is connected to the polymerization kettle body 7 through a pipeline, the outlet end of the heat exchanger 1 is connected to the heat transfer medium storage tank 6 through a pipeline, the outlet end of the heat transfer medium storage tank 6 is connected to the connecting pump 5 through a pipeline, and the outlet end of the connecting pump 5 is connected to the polymerization kettle body 7 through a pipeline;

[0064] The polymerization kettle cooling system 100 is mainly used to quickly cool down the polymerization kettle body 7. This is because: when synthesizing high molecular weight polyacrylate, since the polymerization reaction is an exothermic reaction, a large amount of reaction heat will be generated during the polymerization. If the reaction heat is not removed in time, the polymerization reaction will be out of control, and thus high molecular weight polyacrylate cannot be synthesized.

[0065] The temperature rise and fall integrated system 300 comprises a cooling and heating integrated machine 16, a heat transfer medium storage tank 2 17 and a connecting pump 3 18, the inlet end of the cooling and heating integrated machine 16 is connected to the polymerization kettle body 7 through a pipeline, the outlet end of the cooling and heating integrated machine 16 is connected to the heat transfer medium storage tank 2 17 through a pipeline, the outlet end of the heat transfer medium storage tank 2 17 is connected to the connecting pump 3 18 through a pipeline, and the outlet end of the connecting pump 3 18 is connected to the polymerization kettle body 7 through a pipeline;

[0066] The integrated temperature raising and lowering system 300 is used to raise and lower the temperature of the polymerization kettle body 7 to increase the required reaction temperature in the early and late stages of the polymerization reaction, and to work together with the polymerization kettle cooling system 100 and the stirring shaft temperature control system 72 to maintain the temperature stability in the middle stage of the reaction;

[0067] In the middle stage of the polymerization reaction, according to the feedback of the reactor temperature probe 14, if the temperature in the polymerization kettle body 7 exceeds the specified range of the polymerization reaction temperature, the polymerization kettle cooling system 100 and the heat exchanger 10 in the kettle body and stirring shaft temperature control system 72 are immediately opened, and the heat transfer medium reflux control valve 2 15 and the heat transfer medium inlet control valve 2 19 of the temperature rise and fall integrated system 300 are closed, and the heat transfer medium circulation control valve 2 20 is opened, and the cold heat transfer medium is directly used to cool down the polymerization kettle body 7; when the kettle temperature drops to the specified range, the heat transfer medium reflux control valve 2 and the heat transfer medium inlet control valve 1 4 of the polymerization kettle cooling system 100 are closed, and the heat transfer medium circulation control valve 3 is opened, and the temperature of the stirring shaft 11 is set within the specified range; then the heat transfer medium reflux control valve 2 15 and the heat transfer medium inlet control valve 2 19 of the temperature rise and fall integrated system 300 are opened, and the heat transfer medium circulation control valve 2 20 is closed, and the heat transfer medium is directly used to keep the polymerization kettle body 7 warm.

[0068] like Figure 1 As shown, in one embodiment of the present invention, a driving mechanism is provided at one end of the stirring shaft 11 located outside the polymerization kettle body 7, and the driving mechanism is used to drive the stirring shaft 11 to rotate; specifically, the driving mechanism can be a known conventional motor for driving the stirring shaft 11 to rotate.

[0069] like Figure 1 As shown, in one embodiment of the present invention, the lower ends of the spiral belt 1 121 and the spiral belt 2 122 are both provided with a lower pressing plate 13, and the other ends of the two lower pressing plates 13 are connected;

[0070] The angle between the short side of the lower pressing plate 13 and the horizontal plane is 0-90°;

[0071] The curvature of the long side of the lower pressing plate 13 is consistent with the curvature of the bottom of the polymerization kettle body 7;

[0072] Wherein, after the spiral band 1 121 and the spiral band 2 122 are straightened, their cross sections are in the shape of a right triangle;

[0073] Since the spiral ribbon 1 121 and the spiral ribbon 2 122 on the main spiral ribbon blade 12 of the stirring paddle 71 have a right-angled triangle cross section after being straightened;

[0074] Therefore, the ratio of the length of the two right-angled sides of the right-angled triangle-shaped spiral band 121 to the diameter of the spiral band 121 (i.e., the width of the space inside the spiral formed by the spiral band 121 and the spiral band 2 122, usually measured by the distance between the central axis of the spiral and the peripheral edge) is independently selected from 0.05-0.2;

[0075] The ratio of the length of the two right-angled sides of the right-angled triangle-shaped spiral band 122 to the diameter of the spiral band 122 (i.e., the width of the space inside the spiral formed by the spiral band 1 121 and the spiral band 2 122, usually measured by the distance between the central axis of the spiral and the peripheral edge) is independently selected from 0.05-0.2;

[0076] The distance between the lower pressure plate at the bottom of the stirring paddle 71 and the bottom cover of the kettle should be between 10-80 mm;

[0077] In the present invention, the spiral belt 1 121 and the spiral belt 2 122 are designed to be push-down type, and have the functions of downward pressure and side pressure at the same time; the lower pressure plate 13 is designed to be inclined, so that it has the function of downward pressure during stirring. By utilizing this multifunctional combination design, the stirring paddle 71 of the combined design generates radial outward and downward forces on the fluid, so that the climbing behavior of the high-viscosity fluid is suppressed. Therefore, the stirring paddle 71 of the combined design is suitable for efficient stirring of high-concentration and ultra-high-viscosity fluids in the processes of mixing, heat transfer, reaction, etc.;

[0078] like Figure 4 As shown, the bottom lower pressure plate 13 of the present invention is of inclined design, and the angle between the short side of the lower pressure plate 13 and the horizontal plane is (b). The existence of this angle enables the stirring paddle 71 to further press down the high-viscosity fluid when stirring the high-viscosity fluid, thereby inhibiting the high-viscosity fluid from climbing the rod;

[0079] like Figure 5As shown, the angle between the long side of the lower pressure plate 13 and the horizontal plane is (c). The existence of this angle can not only make the stirring paddle 71 and the bottom of the polymerization kettle body 7 closer, but the matching angle (b) can also provide an outward force (perpendicular to the axial direction) for the fluid, which can push the bottom material to participate in the circulation in the entire polymerization kettle body 7. The mixing effect of the high-viscosity fluid is much better than that of the stirring paddle 71 with an anchor or frame bottom, and can effectively eliminate the poor mixing area caused by the elliptical kettle bottom.

[0080] Preferably, in the above-mentioned stirring paddle 71 suitable for high-viscosity fluid system, the range of the angle (b) is greater than 0° and less than 90°; the range of the angle (b) is further preferably greater than 20° and less than 70°;

[0081] Preferably, in the above-mentioned stirring paddle suitable for high-viscosity fluid system, the angle (c) should be consistent with the curvature of the bottom of the polymerization kettle body 7.

[0082] like Figure 1 As shown, in one embodiment of the present invention, a heat transfer medium reflux control valve 1 is provided on the pipeline between the inlet end of the heat exchanger 1 and the polymerization kettle body 7;

[0083] A heat transfer medium inlet control valve 1 4 is provided on the pipeline connecting the outlet end of the pump 2 5 and the polymerization kettle body 7;

[0084] The polymerization kettle cooling system 100 also includes a heat transfer medium circulation control valve 3 and a circulation control pipeline 400. The heat transfer medium circulation control valve 3 is arranged on the circulation control pipeline 400. One end of the circulation control pipeline 400 is connected to an end of the pipeline between the inlet end of the heat exchanger 1 and the polymerization kettle body 7 close to the inlet end of the heat exchanger 1, and the other end of the circulation control pipeline 400 is connected to an end of the pipeline between the outlet end of the connecting pump 5 and the polymerization kettle body 7 close to the outlet end of the connecting pump 5.

[0085] like Figure 1 As shown, in one embodiment of the present invention, a heat transfer medium reflux control valve 15 is provided on the pipeline between the inlet end of the cold and hot integrated machine 16 and the polymerization kettle body 7;

[0086] A heat transfer medium inlet control valve 2 19 is provided on the pipeline connecting the outlet end of the pump 3 18 and the polymerization kettle body 7;

[0087] The integrated heating and cooling system 300 also includes a heat transfer medium circulation control valve 20 and a circulation control pipeline 500. The heat transfer medium circulation control valve 20 is arranged on the circulation control pipeline 500. One end of the circulation control pipeline 500 is connected to the inlet end of the integrated cooling and heating machine 16, and the other end of the circulation control pipeline 500 is connected to the outlet end of the connecting pump 3 18 and the polymerization kettle body 7. One end of the pipeline is close to the outlet end of the connecting pump 3 18.

[0088] Since a stable reaction system is the key to synthesizing polyacrylates with high molecular weight (Mw ≥ 1.5 million) and low molecular weight distribution (Mw / Mn ≤ 2), the temperature of the polymerization kettle body 7 can be quickly adjusted in the middle stage of the reaction through the setting of the device for synthesizing high molecular weight polyacrylate adhesives, thereby improving the stability of the polymerization reaction; in addition, the stirring paddle of the present invention can effectively take away the polymerization heat generated during the polymerization process.

[0089] The working principle of the device for synthesizing high molecular weight polyacrylate adhesive is as follows: when the polymerized polyacrylate climbs the pole due to the increase of viscosity, the material is mainly concentrated near the stirring paddle 71, the material contact area at the wall of the polymerization kettle body 7 decreases, and the heat exchange efficiency decreases. At the same time, the free radical polymerization is an exothermic reaction, and a large amount of polymer is concentrated around the stirring paddle 71. If the generated reaction heat cannot be quickly extracted from the reaction system, the material will rapidly heat up, and undesirable phenomena such as implosion or gel will occur. Therefore, it is necessary to extract the reaction heat in time during the reaction process, especially after the viscosity increases. The stirring paddle 71 that can actively cool down can take away the reaction heat concentrated around the stirring paddle 71 through the active cooling of the stirring shaft 11, so that the temperature of the reaction process is more stable and uniform, and polyacrylate with a higher molecular weight and a narrower molecular weight distribution can be synthesized, and undesirable phenomena such as gel will not occur due to local overheating; at the same time, the push-down-pressure stirring paddle 71 can effectively inhibit the climbing of the high viscosity fluid system during the stirring process, and can effectively promote the overall flow of the kettle liquid in the polymerization kettle body 7, so that the heat transfer and mass transfer of the high viscosity fluid system are more uniform.

[0090] In a second aspect, the present invention provides a method for synthesizing a device for synthesizing a high molecular weight polyacrylate adhesive, the method comprising the following steps:

[0091] S1: Deoxygenation stage

[0092] According to weight percentage, 55-95 parts of soft monomer, 5-45 parts of hard monomer, 0.1-10 parts of functional monomer and 10-250 parts of solvent are weighed, mixed evenly, and placed in a polymerization kettle 7, the temperature is raised to above the boiling point of the solvent, and nitrogen is introduced into the polymerization kettle 7 to remove oxygen in the polymerization kettle 7. The deoxygenation time is 2 hours. After the deoxygenation is completed, the temperature of the mixture in the polymerization kettle 7 is reduced to 40-70° C. and kept warm for standby use to prepare a pre-mixed material;

[0093] In the deoxygenation stage, the amount of solvent added depends on the monomer concentration, so that the monomer concentration is between 40% and 90%. If the monomer concentration is too high, the gel acceleration effect in the reaction stage will be too fast, and the reaction process will be difficult to control. If the monomer concentration is lower than 40%, it will be difficult to synthesize high molecular weight polyacrylate due to the serious chain transfer of the solvent. At the same time, the reaction temperature in this stage should not be too high. If it is too high, the chain transfer will be serious and the molecular weight of the synthesized polyacrylate will be small.

[0094] S2: Reaction phase

[0095] Use 10 to 40 parts of a solvent free of peroxygen to dissolve 0.001 to 1 part of an initiator to prepare an initiator solution, and then drip it into the premix in the polymerization kettle body 7 for 3 to 7 hours. After the initiator is dripped for 1 to 4 hours, 40 to 300 parts of the solvent are slowly added. Within 1 to 3 hours after the initiator is added, all the solvent is added to the polymerization kettle body 7. After all the solvent is added, continue the reaction for 2 to 5 hours to complete the polymerization reaction and prepare the reactant;

[0096] In step S2, 1 to 4 hours after the initiator is added, 40 to 300 parts of solvent are slowly added, and within 1 to 3 hours after the initiator is added, all the solvent is added to the polymerization kettle body 7, which specifically means: 1 to 4 hours after the initiator is added, 40 to 300 parts of solvent are slowly added, and the droplet speed of the solvent depends on the droplet speed of the initiator, that is, all the solvent needs to be added within 1 to 3 hours after the initiator is added;

[0097] In the reaction stage, the amount of solvent added in this stage and the amount of monomer added in the deoxygenation stage are adjusted to control the theoretical monomer concentration after the solvent is added in this stage to be between 30% and 40%. This is because: if the theoretical monomer concentration is too high, the viscosity of the system is too high, which is not conducive to heat and mass transfer, and there is a risk of a small amount of gel in the synthesized polyacrylate; if the theoretical monomer concentration is too low, the molecular weight of the synthesized polyacrylate is small and the molecular weight distribution is wide;

[0098] S3: Post-processing stage

[0099] After the polymerization reaction is completed, a solvent is added into the polymerization kettle body 7 for dilution, and the concentration of the reactants in the polymerization kettle body 7 is adjusted to 15% to 25% before discharging.

[0100] In the above synthesis step, the soft monomer is any one or more of ethyl acrylate, n-butyl acrylate, isooctyl acrylate, and lauryl methacrylate mixed in any proportion;

[0101] The hard monomer is any one or more of styrene, methyl methacrylate, vinyl acetate, benzyl acrylate, benzyl methacrylate, and 2-phenoxyethyl acrylate mixed in any proportion;

[0102] The functional monomer is any one or more of hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 4-hydroxybutyl acrylate, glycidyl methacrylate, isobornyl acrylate, acrylic acid, and itaconic acid mixed in any proportion;

[0103] The solvent is any one or more of ethyl acetate, toluene and dichloromethane mixed in any proportion;

[0104] The initiator is any one or more of azobisisobutyronitrile, benzoyl peroxide, diisobutyryl peroxide, isopropyl peroxyneodecanoate, 1,1,3,3-tetramethylbutyl peroxyneodecanoate, tert-amyl peroxyneodecanoate, diisobutyl peroxydicarbonate, bis(4-tert-butylcyclohexyl) peroxydicarbonate, di(2-ethylhexyl) peroxydicarbonate, tert-butyl peroxyneodecanoate, tert-amyl peroxypivalate, tert-butyl peroxypivalate, and dilauroyl peroxide, mixed in any proportion.

[0105] The following are specific examples. In the following examples, unless otherwise specified, all raw materials can be obtained from commercial sources.

[0106] Example 1

[0107] This embodiment provides a method for synthesizing a device for synthesizing a high molecular weight polyacrylate adhesive, the method comprising the following steps:

[0108] (1) Deoxygenation stage: 82 parts of soft monomer, 15 parts of hard monomer, 3 parts of functional monomer and 70 parts of solvent were weighed and mixed, and then placed in a polymerization kettle. While the temperature was raised to above the boiling point of the solvent, nitrogen was introduced into the polymerization kettle to remove oxygen in the reaction system for 2 hours. After the deoxygenation was completed, the temperature of the reaction system was lowered to 65°C for insulation.

[0109] (2) Reaction stage: After deoxygenation, 0.002 parts of initiator are dissolved in 20 parts of deoxygenated solvent to prepare an initiator solution, which is then added dropwise to the reactor for 4 hours. After the initiator has been added dropwise for 3 hours, 80 parts of solvent are slowly added and the addition is completed within 3 hours. After the solvent is added dropwise, the polymerization reaction is continued for 4 hours to complete the polymerization reaction. During the reaction, the polymerization reactor cooling system 100 is used to control the temperature of the reaction system.

[0110] (3) Post-treatment stage: After the polymerization reaction is completed, add an appropriate amount of solvent for dilution, and adjust the concentration of the kettle liquid to 15% to 25% before discharging.

[0111] Comparative Example 1

[0112] This comparative example provides a method for synthesizing a device for synthesizing a high molecular weight polyacrylate adhesive. Compared with Example 1, in this comparative example, the polymerization kettle cooling system 100 is not activated to control the temperature of the reaction system, and the rest is consistent with Example 1.

[0113] Comparative Example 2

[0114] This comparative example provides a method for synthesizing a device for synthesizing a high molecular weight polyacrylate adhesive. Compared with Example 1, the stirring paddle in this comparative example uses a common spiral ribbon stirring paddle, and the rest is consistent with Example 1.

[0115] Performance Testing

[0116] The molecular weight and molecular weight distribution of the polyacrylate adhesives prepared in the above examples and comparative examples were tested, and the relevant testing methods are as follows:

[0117] The molecular weight and molecular weight distribution were measured by GPC produced by Waters Company, and the weight average molecular weight was obtained by conversion to standard polystyrene. The sample concentration of GPC test was 2 mg / mL, the sample introduction volume was 50 μmL, the temperature was 30°C, and the flow rate was 1 mL / min, and the determination was carried out by dissolving in tetrahydrofuran;

[0118] The test results are shown in Table 1;

[0119] Table 1

[0120]

[0121] It can be seen from the results in Table 1 that the device for synthesizing a high molecular weight polyacrylate adhesive provided by the present invention, that is, the device for synthesizing a high molecular weight polyacrylate adhesive provided by the present invention is applied to the method for synthesizing a high molecular weight polyacrylate adhesive, and polyacrylates with higher molecular weight and narrower molecular weight distribution can be stably synthesized.

[0122] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0123] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A device for synthesizing high molecular weight polyacrylate adhesive, characterized in that: The invention comprises a kettle body and stirring shaft cooling system (200), a polymerization kettle cooling system (100) and a temperature control system (300), wherein the kettle body and stirring shaft cooling system (200) comprises a polymerization kettle body (7), a stirring paddle (71) arranged in the polymerization kettle body (7) and a stirring shaft temperature control system (72) arranged above the polymerization kettle body (7), the polymerization kettle cooling system (100) and the temperature control system (300) are both arranged outside the polymerization kettle body (7), the polymerization kettle cooling system (100) is used for cooling the polymerization kettle body (7), and the temperature control system (300) is used for heating or cooling the polymerization kettle body (7); The stirring paddle (71) comprises a stirring shaft (11) and a main spiral blade (12) arranged outside the stirring shaft (11); the stirring shaft (11) is a hollow structure; a heat transfer medium inflow channel (111) is arranged inside the stirring shaft (11); a heat transfer medium outflow channel (112) is formed between the heat transfer medium inflow channel (111) and the stirring shaft (11); The stirring shaft temperature control system (72) comprises a heat exchanger (10) and a connecting pump (9) connected to the outlet end of the heat exchanger (10) via a pipeline, the outlet end of the connecting pump (9) is connected to a heat transfer medium inflow channel (111) via a pipeline, the outlet end of the heat transfer medium inflow channel (111) is connected to the inlet end of a heat transfer medium outflow channel (112), and the outlet end of the heat transfer medium outflow channel (112) is connected to the heat exchanger (10); The main helical ribbon blade (12) comprises two helical ribbons, one (121) and one (122), which are helically arranged around the stirring shaft (11) and have the same helical direction; the one (121) and the two (122) are centrally symmetrical about the axis of the stirring shaft (11).

2. The device for synthesizing high molecular weight polyacrylate adhesive according to claim 1, characterized in that: A driving mechanism is provided at one end of the stirring shaft (11) located outside the polymerization kettle body (7), and the driving mechanism is used to drive the stirring shaft (11) to rotate.

3. The device for synthesizing high molecular weight polyacrylate adhesive according to claim 1, characterized in that: A stirring shaft heat transfer medium temperature probe (8) is provided on the pipeline between the heat transfer medium inflow channel (111) and the connection pump 1 (9); The polymerization kettle body (7) is also provided with a reaction kettle temperature probe (14), and the reaction kettle temperature probe (14) is used to monitor the internal temperature of the polymerization kettle body (7).

4. The device for synthesizing high molecular weight polyacrylate adhesive according to claim 1, characterized in that: A plurality of connecting pieces (113) are provided on the outside of the stirring shaft (11), two connecting pieces (113) are provided on the same circumference of the stirring shaft (11), and the angle between the two connecting pieces (113) on the same circumference of the stirring shaft (11) is 180°; The other ends of the two connecting pieces (113) on the same circumference of the stirring shaft (11) are respectively connected to the spiral belt 1 (121) and the spiral belt 2 (122).

5. The device for synthesizing high molecular weight polyacrylate adhesive according to claim 1, characterized in that: The lower ends of the spiral belt 1 (121) and the spiral belt 2 (122) are both provided with a lower pressing plate (13), and the other ends of the two lower pressing plates (13) are connected.

6. The device for synthesizing high molecular weight polyacrylate adhesive according to claim 5, characterized in that: The angle between the short side of the lower pressing plate (13) and the horizontal plane is 0-90°; The curvature of the long side of the lower pressing plate (13) is consistent with the curvature of the bottom of the polymerization kettle body (7).

7. The device for synthesizing high molecular weight polyacrylate adhesive according to claim 1, characterized in that: The polymerization kettle cooling system (100) comprises a heat exchanger 2 (1), a heat transfer medium storage tank 1 (6) and a connecting pump 2 (5), wherein the inlet end of the heat exchanger 2 (1) is connected to the polymerization kettle body (7) via a pipeline, the outlet end of the heat exchanger 2 (1) is connected to the heat transfer medium storage tank 1 (6) via a pipeline, the outlet end of the heat transfer medium storage tank 1 (6) is connected to the connecting pump 2 (5) via a pipeline, and the outlet end of the connecting pump 2 (5) is connected to the polymerization kettle body (7) via a pipeline; A heat transfer medium reflux control valve (2) is provided on the pipeline between the inlet end of the second heat exchanger (1) and the polymerization kettle (7); A heat transfer medium inlet control valve 1 (4) is provided on the pipeline between the outlet end of the connecting pump 2 (5) and the polymerization kettle body (7); The polymerization kettle cooling system (100) further comprises a heat transfer medium circulation control valve (3) and a circulation control pipeline (400).

8. The device for synthesizing high molecular weight polyacrylate adhesive according to claim 7, characterized in that: The heat transfer medium circulation control valve 1 (3) is arranged on the circulation control pipeline 1 (400), one end of the circulation control pipeline 1 (400) is connected to the pipeline between the inlet end of the heat exchanger 2 (1) and the polymerization kettle body (7) close to the inlet end of the heat exchanger 2 (1), and the other end of the circulation control pipeline 1 (400) is connected to the pipeline between the outlet end of the connection pump 2 (5) and the polymerization kettle body (7) close to the outlet end of the connection pump 2 (5).

9. The device for synthesizing high molecular weight polyacrylate adhesive according to claim 1, characterized in that: The integrated temperature control system (300) comprises an integrated cold and hot machine (16), a second heat transfer medium storage tank (17) and a third connecting pump (18); the inlet end of the integrated cold and hot machine (16) is connected to the polymerization kettle body (7) through a pipeline, the outlet end of the integrated cold and hot machine (16) is connected to the second heat transfer medium storage tank (17) through a pipeline, the outlet end of the second heat transfer medium storage tank (17) is connected to the third connecting pump (18) through a pipeline, and the outlet end of the third connecting pump (18) is connected to the polymerization kettle body (7) through a pipeline; A second heat transfer medium reflux control valve (15) is provided on the pipeline between the inlet end of the integrated cold and hot machine (16) and the polymerization kettle body (7); A heat transfer medium inlet control valve 2 (19) is provided on the pipeline between the outlet end of the connecting pump 3 (18) and the polymerization kettle body (7); The integrated temperature control system (300) further comprises a second heat transfer medium circulation control valve (20) and a second circulation control pipeline (500).

10. The device for synthesizing high molecular weight polyacrylate adhesive according to claim 9, characterized in that: The heat transfer medium circulation control valve 2 (20) is arranged on the circulation control pipeline 2 (500), one end of the circulation control pipeline 2 (500) is connected to the inlet end of the cold and hot integrated machine (16), and the other end of the circulation control pipeline 2 (500) is connected to the outlet end of the connection pump 3 (18) and the end of the pipeline between the polymerization kettle body (7) close to the outlet end of the connection pump 3 (18).

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