A silicone sealant production device

Abstract

The utility model discloses a silicone sealant production device relates to sealant production technical field, including the reation kettle, the inlet of reation kettle is respectively through pipeline communication to have silica rubber jar, white carbon black jar, calcium carbonate jar, anti -settling agent jar, plasticizing agent jar, crosslinking agent jar and catalyst jar, the outlet of reation kettle is through pipeline communication to have double screw extruder, the outlet of double screw extruder is through pipeline communication to have product jar. Through adding anti -settling agent (such as organic bentonite) to reation kettle, with silica rubber, filler (white carbon black, calcium carbonate), plasticizing agent synchronous mixing, anti -settling agent can form three -dimensional net structure, prevent filler and settle in the subsequent storage and construction process, and the uniformity of silicone sealant is good, and the product quality is high.

Description

Technical Field

[0001] This utility model relates to the field of sealant production technology, specifically to a silicone sealant production apparatus. Background Technology

[0002] Silicone sealant is a paste-like substance made primarily of silicone rubber, supplemented with crosslinking agents, fillers, plasticizers, coupling agents, and catalysts, mixed under vacuum. It cures at room temperature by reacting with water in the air to form elastic silicone rubber. However, existing production equipment has several problems in the production process of silicone weather-resistant sealant, resulting in poor stability. The fillers settle during subsequent storage and application, leading to poor uniformity of the sealant and severely impacting its quality. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a silicone sealant production device that produces silicone sealant with good uniformity and high product quality, in order to address the shortcomings of the existing technology.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A silicone sealant production apparatus includes a reaction vessel. The inlet of the reaction vessel is connected via pipes to a silicone rubber tank, a silica tank, a calcium carbonate tank, an anti-settling agent tank, a plasticizer tank, a crosslinking agent tank, and a catalyst tank. The outlet of the reaction vessel is connected via a pipe to a twin-screw extruder, and the outlet of the twin-screw extruder is connected via a pipe to a product tank.

[0006] As an improved technical solution, the outlet of the silicone rubber tank is connected to a dehydration tank via a pipeline, and the outlet of the dehydration tank is connected to the reaction vessel via a pipeline.

[0007] As an improved technical solution, the dehydration tank is equipped with a spiral guide plate inside.

[0008] As an improved technical solution, the outlets of the silica tank and the calcium carbonate tank are respectively connected to a high-speed mixer via pipelines, the inlet of the high-speed mixer is respectively connected to a coupling agent tank and an antioxidant tank via pipelines, and the outlet of the high-speed mixer is connected to the reaction vessel via a pipeline.

[0009] As an improved technical solution, the inlet of the crosslinking agent tank is connected to a first compounding tank via a pipeline, and the inlet of the first compounding tank is connected to a methyltriacetoxysilane tank and a vinyltriacetoxysilane tank via pipelines respectively.

[0010] As an improved technical solution, the inlet of the catalyst tank is connected to a second compound tank via a pipeline, and the inlet of the second compound tank is connected to a dibutyltin dilaurate tank and a stannous octoate tank via pipelines.

[0011] As a preferred technical solution, the reactor is equipped with a temperature sensor, and the cooling water inlet pipe of the reactor jacket is equipped with an automatic regulating valve. The temperature sensor and the automatic regulating valve are interlocked to the control system.

[0012] As a preferred technical solution, the outlet of the twin-screw extruder is connected to a degassing machine via a pipeline, the top material outlet of the degassing machine is connected to the product tank via a pipeline, and the top gas phase outlet of the degassing machine is connected to a tail gas adsorption device via a pipeline.

[0013] As a preferred technical solution, the inlet of the twin-screw extruder is connected to a nano-zinc oxide tank via a pipe.

[0014] As a preferred technical solution, the outlet of the nano zinc oxide tank is connected to an ultrasonic dispersion device via a pipeline, and the outlet of the ultrasonic dispersion device is connected to the inlet of the twin-screw extruder via a metering pump.

[0015] Due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0016] This invention relates to a silicone sealant production apparatus, comprising a reaction vessel. The inlet of the reaction vessel is connected via pipes to a silicone rubber tank, a silica tank, a calcium carbonate tank, an anti-settling agent tank, a plasticizer tank, a crosslinking agent tank, and a catalyst tank. The outlet of the reaction vessel is connected via a pipe to a twin-screw extruder, and the outlet of the twin-screw extruder is connected via a pipe to a product tank. By adding an anti-settling agent (such as organobentonite) to the reaction vessel and simultaneously mixing it with silicone rubber, fillers (silica, calcium carbonate), and plasticizer, the anti-settling agent forms a three-dimensional network structure, preventing the fillers from settling during subsequent storage and construction. This results in a silicone sealant with good uniformity and high product quality.

[0017] The outlet of the silicone rubber can of this invention is connected to a dehydration tank via a pipeline, and the outlet of the dehydration tank is connected to the reaction vessel via a pipeline. This specialized dehydration treatment of the silicone rubber raw material effectively removes moisture, preventing it from generating bubbles or affecting chemical bonding stability during subsequent reactions with other raw materials (such as crosslinking agents and catalysts). This ensures the purity of the silicone rubber raw material from the source, laying the foundation for the subsequent production of stable, bubble-free silicone sealant.

[0018] The dehydration tank is equipped with a spiral guide plate inside. The spiral guide plate can change the flow path of silicone rubber in the dehydration tank, prolong the contact time between silicone rubber and the heating surface, enhance the stirring and mixing effect of the material in the tank, accelerate the water evaporation rate, and prevent the silicone rubber from overheating due to prolonged residence in certain areas, which could lead to molecular chain breakage. This improves the dehydration efficiency while preserving the original properties of the silicone rubber raw material.

[0019] The outlets of the silica tank and the calcium carbonate tank are respectively connected to a high-speed mixer via pipelines. The inlet of the high-speed mixer is connected to a coupling agent tank and an antioxidant tank via pipelines. The outlet of the high-speed mixer is connected to the reactor via a pipeline. Silica, calcium carbonate, coupling agent, and antioxidant are premixed before entering the reactor. The strong shearing action of the high-speed mixer ensures that the coupling agent is uniformly coated on the surface of the fillers (silica and calcium carbonate), improving the compatibility of the fillers with silicone rubber. Simultaneously, the antioxidant can bind to the fillers in advance, enhancing their anti-aging ability and preventing uneven product performance caused by insufficient subsequent mixing.

[0020] The inlet of the crosslinking agent tank is connected to a first compounding tank via a pipeline. The inlet of the first compounding tank is connected to a methyltriacetoxysilane tank and a vinyltriacetoxysilane tank via pipelines. The compounding ratio of methyltriacetoxysilane and vinyltriacetoxysilane can be precisely controlled within the first compounding tank to form a higher-performance compound crosslinking agent. Compared to a single crosslinking agent, this reduces the activation energy of the sealant curing reaction, improves the curing efficiency of the sealant at low temperatures, meets the needs of different construction temperature scenarios, and eliminates the need for subsequent adjustments to the amount of the two crosslinking agents added within the reactor, simplifying the operation process.

[0021] The catalyst tank's inlet is connected to a second compounding tank via a pipeline. The inlet of the second compounding tank is connected to a dibutyltin dilaurate tank and a stannous octoate tank via pipelines. The second compounding tank allows for precise compounding of dibutyltin dilaurate and stannous octoate. The compounded catalyst works synergistically with the compounded crosslinking agent to further optimize the curing reaction rate of the sealant. This ensures that curing is not too rapid at high temperatures, preventing the sealant from becoming brittle, while also ensuring that curing is not too slow at low temperatures, thus improving the sealant's curing stability at different temperatures.

[0022] The reactor is equipped with a temperature sensor, and an automatic regulating valve is installed on the cooling water inlet pipe of the reactor jacket. The temperature sensor and the automatic regulating valve are interlocked to the control system. The temperature sensor can monitor the temperature inside the reactor in real time. When the temperature exceeds a set threshold, the control system can immediately trigger the automatic regulating valve to adjust the cooling water flow rate, quickly reducing the temperature inside the reactor to a suitable range. This prevents raw material degradation or abnormal reaction due to excessive temperature, achieving automatic closed-loop control of the reaction process temperature and ensuring stable mixing reaction.

[0023] The outlet of the twin-screw extruder is connected to a degassing machine via a pipeline. The top material outlet of the degassing machine is connected to the product tank via a pipeline, and the top gas phase outlet of the degassing machine is connected to a tail gas adsorption device via a pipeline. The degassing machine removes residual micro-bubbles from the rubber compound after twin-screw extrusion, preventing bubbles from affecting the mechanical properties and appearance quality of the sealant. Simultaneously, the tail gas adsorption device adsorbs volatile organic compounds (VOCs) emitted during the degassing process, ensuring that tail gas emissions meet environmental standards, reducing environmental pollution, and balancing product quality with environmental requirements.

[0024] The inlet of the twin-screw extruder is connected to a nano-zinc oxide tank via a pipe. Nano-zinc oxide can be precisely added into the twin-screw extruder. The nano-zinc oxide can be evenly dispersed in the rubber compound, absorb ultraviolet rays, reduce the damage of ultraviolet rays to the molecular chains of silicone rubber, significantly improve the weather resistance of the sealant, making it suitable for outdoor scenarios with strong ultraviolet radiation such as high altitudes and tropical regions, and extending the product's service life.

[0025] The outlet of the nano-zinc oxide tank is connected to an ultrasonic dispersion device via a pipeline. The outlet of the ultrasonic dispersion device is connected to the inlet of the twin-screw extruder via a metering pump. The ultrasonic dispersion device utilizes the vibration of ultrasound to disperse the nano-zinc oxide into a uniform suspension, preventing uneven dispersion caused by the agglomeration of small nano-zinc oxide particles. The metering pump can precisely control the amount of nano-zinc oxide added, ensuring a stable nano-zinc oxide content in each batch of adhesive, further guaranteeing the consistency of the sealant's weather resistance and avoiding product performance fluctuations due to inaccurate addition or uneven dispersion. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0028] The components include: 1. Reactor; 2. Silicone rubber tank; 3. Silica tank; 4. Calcium carbonate tank; 5. Anti-settling agent tank; 6. Plasticizer tank; 7. Crosslinking agent tank; 8. Catalyst tank; 9. Twin-screw extruder; 10. Product tank; 11. Dehydration tank; 12. Spiral baffle; 13. High-speed mixer; 14. Coupling agent tank; 15. Antioxidant tank; 16. First compounding tank; 17. Methyltriacetoxysilane tank; 18. Vinyltriacetoxysilane; 19. Second compounding tank; 20. Dibutyltin dilaurate tank; 21. Stannous octoate; 22. Temperature sensor; 23. Automatic regulating valve; 24. Degassing machine; 25. Tail gas adsorption device; 26. Nano zinc oxide tank; 27. Ultrasonic dispersion device; 28. Metering pump. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] like Figure 1 As shown, a silicone sealant production apparatus includes a reactor 1. The inlet of the reactor 1 is connected via pipes to a silicone rubber tank 2, a silica tank 3, a calcium carbonate tank 4, an anti-settling agent tank 5, a plasticizer tank 6, a crosslinking agent tank 7, and a catalyst tank 8. The outlet of the reactor 1 is connected via a pipe to a twin-screw extruder 9, and the outlet of the twin-screw extruder 9 is connected via a pipe to a product tank 10. By adding an anti-settling agent (such as organobentonite) to the reactor 1 and simultaneously mixing it with silicone rubber, fillers (silica, calcium carbonate), and plasticizer, the anti-settling agent can form a three-dimensional network structure, preventing the fillers from settling during subsequent storage and construction. This results in silicone sealant with good uniformity and high product quality.

[0031] The outlet of the silicone rubber tank 2 is connected to a dehydration tank 11 via a pipeline, and the outlet of the dehydration tank 11 is connected to the reaction vessel 1 via a pipeline. This specialized dehydration treatment effectively removes moisture from the silicone rubber raw material, preventing moisture from generating bubbles or affecting chemical bonding stability during subsequent reactions with other raw materials (such as crosslinking agents and catalysts). This ensures the purity of the silicone rubber raw material from the source, laying the foundation for the subsequent production of stable, bubble-free silicone sealant.

[0032] The dehydration tank 11 is equipped with a spiral guide plate 12 inside. The spiral guide plate 12 can change the flow path of silicone rubber in the dehydration tank 11, prolong the contact time between silicone rubber and the heating surface, enhance the stirring and mixing effect of the material in the tank, accelerate the water evaporation rate, avoid local overheating of silicone rubber due to prolonged residence, which would lead to molecular chain breakage, improve dehydration efficiency, and protect the original properties of silicone rubber raw material.

[0033] The outlets of the silica tank 3 and the calcium carbonate tank 4 are respectively connected to a high-speed mixer 13 via pipelines. The inlet of the high-speed mixer 13 is respectively connected to a coupling agent tank 14 and an antioxidant tank 15 via pipelines. The outlet of the high-speed mixer 13 is connected to the reactor 1 via a pipeline. Silica, calcium carbonate, coupling agent, and antioxidant are premixed before entering the reactor 1. The strong shearing action of the high-speed mixer 13 ensures that the coupling agent is uniformly coated on the surface of the fillers (silica and calcium carbonate), improving the compatibility of the fillers with silicone rubber. Simultaneously, the antioxidant can bind to the fillers in advance, enhancing the fillers' anti-aging ability and avoiding uneven product performance caused by insufficient subsequent mixing.

[0034] The inlet of the crosslinking agent tank 7 is connected to the first compounding tank 16 via a pipeline. The inlet of the first compounding tank 16 is connected to the methyltriacetoxysilane tank 17 and the vinyltriacetoxysilane tank 18 via pipelines. The compounding ratio of methyltriacetoxysilane and vinyltriacetoxysilane 18 can be precisely controlled in the first compounding tank 16 to form a compound crosslinking agent with better performance. Compared with a single crosslinking agent, it can reduce the activation energy of the sealant curing reaction, improve the curing efficiency of the sealant in low-temperature environments, meet the needs of different construction temperature scenarios, and eliminate the need to temporarily adjust the addition amount of the two crosslinking agents in the reaction vessel 1, simplifying the operation process.

[0035] The inlet of the catalyst tank 8 is connected to a second compounding tank 19 via a pipeline. The inlet of the second compounding tank 19 is connected to a dibutyltin dilaurate tank 20 and a stannous octoate tank 21 via pipelines. The second compounding tank 19 allows for precise compounding of dibutyltin dilaurate and stannous octoate 21. The compounded catalyst works synergistically with the compounded crosslinking agent to further optimize the curing reaction rate of the sealant. This ensures that curing is not too rapid at high temperatures, preventing the sealant from becoming brittle, and that curing is not too slow at low temperatures, thus improving the curing stability of the sealant at different temperatures.

[0036] The reactor 1 is equipped with a temperature sensor 22, and an automatic regulating valve 23 is installed on the cooling water inlet pipe of the reactor 1. The temperature sensor 22 and the automatic regulating valve 23 are interlocked to the control system. The temperature sensor 22 can monitor the temperature inside the reactor 1 in real time. When the temperature exceeds a set threshold, the control system can immediately trigger the automatic regulating valve 23 to adjust the cooling water flow rate, quickly reducing the temperature inside the reactor 1 to a suitable range. This avoids raw material degradation or abnormal reaction due to excessive temperature, achieving automatic closed-loop control of the reaction process temperature and ensuring stable mixing reaction.

[0037] The outlet of the twin-screw extruder 9 is connected to a degassing machine 24 via a pipeline. The top material outlet of the degassing machine 24 is connected to the product tank 10 via a pipeline, and the top gas phase outlet of the degassing machine 24 is connected to a tail gas adsorption device 25 via a pipeline. The degassing machine 24 can remove the tiny air bubbles remaining in the rubber compound after twin-screw extrusion, preventing the air bubbles from affecting the mechanical properties and appearance quality of the sealant. At the same time, the tail gas adsorption device 25 can adsorb the volatile organic compounds (VOCs) volatilized during the degassing process, so that the tail gas emissions meet environmental protection standards, reduce environmental pollution, and balance product quality and environmental protection requirements.

[0038] The inlet of the twin-screw extruder 9 is connected to a nano-zinc oxide tank 26 via a pipe. Nano-zinc oxide can be precisely added into the twin-screw extruder 9. The nano-zinc oxide can be evenly dispersed in the rubber compound, absorb ultraviolet rays, reduce the damage of ultraviolet rays to the molecular chains of silicone rubber, significantly improve the weather resistance of the sealant, making it suitable for outdoor scenarios with strong ultraviolet radiation such as high altitudes and tropical regions, and extending the service life of the product.

[0039] The outlet of the nano zinc oxide tank 26 is connected to an ultrasonic dispersion device 27 via a pipeline. The outlet of the ultrasonic dispersion device 27 is connected to the inlet of the twin-screw extruder 9 via a metering pump 28. The ultrasonic dispersion device 27 can use the vibration of ultrasound to disperse the nano zinc oxide into a uniform suspension, avoiding uneven dispersion caused by the agglomeration of nano zinc oxide particles due to their small size. The metering pump 28 can precisely control the amount of nano zinc oxide added, ensuring a stable content of nano zinc oxide in each batch of adhesive, further guaranteeing the consistency of the sealant's weather resistance performance, and avoiding product performance fluctuations caused by inaccurate addition or uneven dispersion.

[0040] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A silicone sealant production apparatus, comprising a reaction vessel, characterized in that: The inlet of the reactor is connected via pipes to a silicone rubber tank, a silica tank, a calcium carbonate tank, an anti-settling agent tank, a plasticizer tank, a crosslinking agent tank, and a catalyst tank. The outlet of the reactor is connected via pipes to a twin-screw extruder, and the outlet of the twin-screw extruder is connected via pipes to a product tank.

2. The silicone sealant production apparatus as described in claim 1, characterized in that: The outlet of the silicone rubber tank is connected to a dehydration tank via a pipeline, and the outlet of the dehydration tank is connected to the reaction vessel via a pipeline.

3. The silicone sealant production apparatus as described in claim 2, characterized in that: The dehydration tank is equipped with a spiral guide plate inside.

4. The silicone sealant production apparatus as described in claim 1, characterized in that: The outlets of the silica tank and the calcium carbonate tank are respectively connected to a high-speed mixer via pipelines. The inlet of the high-speed mixer is respectively connected to a coupling agent tank and an antioxidant tank via pipelines. The outlet of the high-speed mixer is connected to the reaction vessel via a pipeline.

5. The silicone sealant production apparatus as described in claim 1, characterized in that: The inlet of the crosslinking agent tank is connected to a first compounding tank via a pipeline, and the inlet of the first compounding tank is connected to a methyltriacetoxysilane tank and a vinyltriacetoxysilane tank via pipelines.

6. The silicone sealant production apparatus as described in claim 1, characterized in that: The inlet of the catalyst tank is connected to a second compounding tank via a pipeline, and the inlet of the second compounding tank is connected to a dibutyltin dilaurate tank and a stannous octoate tank via pipelines.

7. The silicone sealant production apparatus as described in claim 1, characterized in that: The reactor is equipped with a temperature sensor, and the cooling water inlet pipe of the reactor jacket is equipped with an automatic regulating valve. The temperature sensor and the automatic regulating valve are interlocked to the control system.

8. The silicone sealant production apparatus as described in claim 1, characterized in that: The outlet of the twin-screw extruder is connected to a degassing machine via a pipeline. The top material outlet of the degassing machine is connected to the product tank via a pipeline. The top gas phase outlet of the degassing machine is connected to a tail gas adsorption device via a pipeline.

9. The silicone sealant production apparatus as described in claim 1, characterized in that: The inlet of the twin-screw extruder is connected to a nano zinc oxide tank via a pipe.

10. The silicone sealant production apparatus as described in claim 9, characterized in that: The outlet of the nano zinc oxide tank is connected to an ultrasonic dispersion device via a pipeline, and the outlet of the ultrasonic dispersion device is connected to the inlet of the twin-screw extruder via a metering pump.

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