A base production system for use in the preparation of a silicone sealant

Abstract

The utility model relates to silicone sealant technical field especially, it relates to a base material production system used in the preparation of silicone sealant, including dehydration kettle and modification reation kettle, and the outlet of dehydration kettle and the outlet of modification reation kettle are connected with the reaction unit respectively, the top and bottom of reaction unit are equipped with inlet and outlet respectively, and the top of reaction unit is equipped with vacuum port, and the vacuum port is connected with vacuum buffer device, the outside of reaction unit is equipped with first heating part, and the inside of reaction unit is equipped with second heating part and pivot, and one end of pivot is connected with motor, and first dispersion part, second dispersion part and third dispersion part are equipped on pivot. The production system is reasonable in design, can guarantee that material mixes evenly, contacts reaction fully, also discharges the moisture in material, reduces and avoids the generation of air bubble when stirring, guarantees the quality of base material.

Description

Technical Field

[0001] This utility model relates to the field of silicone sealant technology, and in particular to a base material production system used in the preparation of silicone sealants. Background Technology

[0002] Silicone sealant is a high-molecular-weight elastic sealing material made primarily of polysiloxane, along with fillers, crosslinking agents, catalysts, and other additives. Due to its excellent weather resistance, sealing properties, and adaptability, it is widely used in construction, electronics, and automotive industries. The production process of silicone sealant can be divided into four core stages: base material preparation, adhesive mixing, degassing, and packaging. The base material is the core component of silicone sealant, formed by the reaction of polysiloxane (such as α,ω-dihydroxypolydimethylsiloxane) with crosslinking agents and reinforcing fillers, and determines the sealant's basic properties (such as elasticity and adhesion). Existing technology involves adding pretreated polysiloxane, silica, and catalysts (such as organotin compounds) to a reaction device equipped with a stirring component, controlling the reaction temperature and time to ensure uniform dispersion of silica and initial reaction with the base adhesive to obtain the base material. However, in actual production, the simple structure of the stirring component in existing production devices leads to insufficient mixing of materials. Furthermore, moisture entrained in the raw materials can cause bubbles to form during base material preparation, ultimately affecting the quality of the prepared base material. Therefore, to address the above issues, it is necessary to develop a base material production system for silicone sealant preparation. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a base material production system for the preparation of silicone sealant, which can make the materials uniformly mixed, avoid the generation of air bubbles, and ensure the quality of the base material.

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

[0005] A base material production system for preparing silicone sealant includes a dehydration kettle and a modification reactor. The outlet of the dehydration kettle and the outlet of the modification reactor are respectively connected to a reaction device. The top and bottom of the reaction device are respectively provided with an inlet and an outlet. The top of the reaction device is provided with a vacuum port, which is connected to a vacuum buffer device. The outside of the reaction device is provided with a first heating element, and the inside of the reaction device is provided with a second heating element and a rotating shaft. One end of the rotating shaft is connected to a motor, and the rotating shaft is provided with a first dispersion element, a second dispersion element, and a third dispersion element.

[0006] As an improved technical solution, the dehydration vessel includes a vessel body, with a feed inlet and an vent at the top and a discharge outlet at the bottom. The vent outlet is connected to a vacuum pump. The vessel body is equipped with a jacket on the outside and a rotating shaft and multiple interconnected heating coils inside the vessel body. One end of the rotating shaft is connected to a motor, and multiple stirring rods are provided on the rotating shaft, with multiple stirring bars on each stirring rod.

[0007] As an improved technical solution, the modified reaction vessel includes a vessel body, with a feed inlet and a modifier inlet at the top of the vessel body, and a discharge outlet at the bottom of the vessel body; the vessel body is equipped with a jacket on the outside, and a rotating shaft and a temperature sensor are installed inside the vessel body; one end of the rotating shaft is connected to a motor, and a multi-layer hollowed-out stirring plate is provided on the rotating shaft, with multiple stirring teeth on the stirring plate; the temperature sensor is electrically connected to a controller.

[0008] As an improved technical solution, the vacuum buffer device includes a buffer tank, the vent of which is connected to a vacuum pump.

[0009] As an improved technical solution, the first heating component is a jacket disposed outside the reaction device; the second heating component is a plurality of hollow heating plates disposed inside the reaction device, the top of the heating plate is connected to a steam buffer pipe through a steam inlet pipe, the bottom of the heating plate is connected to a condensate buffer pipe through a condensate outlet pipe, and a drain pipe is provided on one side of the lower part of the condensate buffer pipe.

[0010] As an improved technical solution, both the first dispersing component and the third dispersing component include a conical frame, on which a plurality of dispersing blocks are provided, and on which a plurality of conical bodies are provided.

[0011] As an improved technical solution, the second dispersing component includes a fixed base, on which a plurality of dispersing rods are provided, and at the end of each dispersing rod is a dispersing plate with a hollow structure, and on each dispersing rod are a plurality of dispersing bars.

[0012] After adopting the above technical solution, the beneficial effects of this utility model are:

[0013] The base material production system used in the preparation of silicone sealant includes a dehydration kettle and a modification reactor. The outlet of the dehydration kettle and the outlet of the modification reactor are respectively connected to the reaction device. The top and bottom of the reaction device are respectively provided with an inlet and an outlet. The top of the reaction device is provided with a vacuum port, which is connected to a vacuum buffer device. The outside of the reaction device is provided with a first heating element, and the inside of the reaction device is provided with a second heating element and a rotating shaft. One end of the rotating shaft is connected to a motor, and the rotating shaft is provided with a first dispersion element, a second dispersion element, and a third dispersion element. In actual production, α,ω-dihydroxypolydimethylsiloxane is pumped into a dehydration reactor for dehydration, while silica enters a modification reactor for modification. The dehydrated α,ω-dihydroxypolydimethylsiloxane first enters the reaction apparatus, followed by the addition of a plasticizer. The first and second heating elements provide the necessary temperature for the reaction. A motor drives the first, second, and third dispersion elements to stir and disperse the materials. Then, the modified silica is added, and stirring and dispersion continue. A vacuum buffer removes moisture from the materials, preventing air bubbles generated during stirring and avoiding voids after curing. This production system is rationally designed, ensuring uniform mixing and full contact with the reaction materials. It also removes moisture from the materials, reducing and preventing air bubble formation during stirring, thus ensuring the quality of the base material.

[0014] The dehydration reactor comprises a reactor body with an inlet and an outlet at the top and an outlet at the bottom, the outlet connected to a vacuum pump. The reactor body has an external jacket and an internal rotating shaft and multiple interconnected heating coils. One end of the rotating shaft is connected to a motor, and multiple stirring rods with various stirring plates are mounted on the shaft. α,ω-dihydroxypolydimethylsiloxane enters the reactor body via a pump, where it is heated by the heat transfer medium in the jacket and heating coils. The motor, once started, drives the rotating shaft, stirring rods, and stirring plates to ensure uniform heating. Under the action of the vacuum pump, the water is discharged. This dehydration reactor is rationally designed and can effectively remove moisture from the raw materials.

[0015] The modified reactor consists of a vessel body with a feed inlet and a modifier inlet at the top, and a discharge outlet at the bottom. The vessel body is externally jacketed, and internally houses a rotating shaft and a temperature sensor. One end of the shaft is connected to a motor, and the shaft is equipped with multi-layered, perforated stirring plates with multiple stirring teeth. The temperature sensor is electrically connected to a controller. Silica enters the reactor body, and the modifier is added. The heat transfer medium in the jacket provides the necessary temperature for the modification reaction. Once the motor starts, it drives the rotating shaft and the multiple stirring plates and teeth to rotate, ensuring thorough contact and reaction between the silica and the modifier. The temperature sensor detects the temperature of the material. This modified reactor design is reasonable and achieves effective modification of silica.

[0016] The vacuum buffer device includes a buffer tank, the vent of which is connected to a vacuum pump. Water vapor in the reactants enters the buffer tank through the vent and is then removed by the vacuum pump, thus dehydrating the material. This vacuum buffer device effectively removes moisture from the reactants and prevents the formation of bubbles.

[0017] The first heating element is a jacket located outside the reaction apparatus; the second heating element consists of multiple hollow heating plates located inside the reaction apparatus. The top of each heating plate is connected to a steam buffer pipe via a steam inlet pipe, and the bottom is connected to a condensate buffer pipe via a condensate outlet pipe. A drain pipe is located on one side of the lower part of the condensate buffer pipe. Steam entering the first heating element (jacket) heats the material. The steam first enters the steam buffer pipe, then flows along the steam inlet pipe into the interior of the heating plate to heat the material. The condensate from the steam heat exchange in the heating plate enters the condensate buffer pipe through the condensate outlet pipe and is finally discharged through the drain pipe. The steam in the first and second heating elements (heating plates) works synergistically to heat the material, providing the temperature required for the reaction. This structure of the first and second heating elements significantly improves heating efficiency and ensures uniform heating of the material.

[0018] Since both the first and third dispersion components include conical frames with multiple dispersion blocks and multiple conical bodies on each block, the rotating shaft drives the conical frames, dispersion plates, and conical bodies of the first and third dispersion components to stir and mix the materials, promoting full contact and reaction of the materials, and greatly improving mixing and reaction efficiency.

[0019] The second dispersing component includes a fixed base with multiple dispersing rods. Each dispersing rod has a perforated dispersing plate at its end and multiple dispersing bars on it. A rotating shaft drives the fixed base, dispersing rods, dispersing plates, and dispersing bars to rotate, thus mixing the surrounding materials and promoting full contact and reaction, significantly improving mixing and reaction efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the base material production system for preparing silicone sealant according to this utility model;

[0021] Among them, 1-dehydration vessel, 10-heating coil, 2-modification reaction vessel, 20-temperature sensor, 21-controller, 3-reaction device, 30-first heating component, 31-second heating component, 310-steam inlet pipe, 311-steam buffer pipe, 312-condensate outlet pipe, 313-condensate buffer pipe, 314-drain pipe, 32-rotating shaft, 33-motor, 34-first dispersion component, 35-second dispersion component, 350-fixed base, 351-dispersion rod, 352-dispersion plate, 353-dispersion bar, 36-third dispersion component, 360-conical frame, 361-dispersion block, 362-conical body, 4-vacuum buffer device, 40-buffer tank, 41-vacuum pump. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] A base material production system for the preparation of silicone sealants, such as Figure 1 As shown, the apparatus includes a dehydration vessel 1 and a modification reaction vessel 2. The outlets of the dehydration vessel 1 and the modification reaction vessel 2 are respectively connected to the reaction device 3. The top and bottom of the reaction device 3 are respectively provided with an inlet and an outlet. The top of the reaction device 3 is provided with a vacuum port, which is connected to a vacuum buffer device 4 (including a buffer tank 40, the vent of the buffer tank 40 is connected to a vacuum pump 41). The outside of the reaction device 3 is provided with a first heating component 30 (jacket). The inside of the reaction device 3 is provided with a second heating component 31 (including multiple hollow heating plates, the top of the heating plates is connected to a steam buffer pipe 311 through a steam inlet pipe 310, the bottom of the heating plates is connected to a condensate buffer pipe 313 through a condensate outlet pipe 312, and a drain pipe 314 is provided on one side of the lower part of the condensate buffer pipe 313) and a rotating shaft 32. One end of the rotating shaft 32 is connected to a motor 33. The rotating shaft 33 is provided with a first dispersion component 34, a second dispersion component 35 and a third dispersion component 36.

[0024] In actual production, α,ω-dihydroxypolydimethylsiloxane is pumped into the dehydration reactor for dehydration, while silica enters the modification reactor for modification. The dehydrated α,ω-dihydroxypolydimethylsiloxane first enters the reaction device, followed by the addition of plasticizer. The steam in the first heating element (jacket) and the second heating element (heating plate) work together to heat the material, providing the required temperature for the reaction and greatly improving heating efficiency, ensuring uniform heating of the material. The motor starts and drives the first, second, and third dispersion elements to stir and disperse the material. Then, the modified silica is added, and stirring and dispersion continue. Water vapor in the material enters the buffer tank through the vent and is then extracted by the vacuum pump, thereby dehydrating the material and removing air bubbles generated by stirring. This prevents air bubble residue from causing voids after curing, ensuring the quality of the base material.

[0025] The dehydration reactor 1 includes a reactor body with an inlet and an outlet at the top and an outlet at the bottom, the outlet of which is connected to a vacuum pump. The reactor body has an external jacket and an internal rotating shaft and multiple interconnected heating coils 10. One end of the rotating shaft is connected to a motor, and multiple stirring rods with multiple stirring plates are mounted on the shaft. α,ω-dihydroxypolydimethylsiloxane enters the reactor body via a pump, where it is heated by the heat transfer medium in the jacket and heating coils. After the motor starts, it drives the rotating shaft, the multiple stirring rods, and the multiple stirring plates to stir and heat the material, promoting uniform heating. Water is then discharged under the action of the vacuum pump.

[0026] The modified reaction vessel 2 includes a vessel body with a feed inlet and a modifier inlet at the top and a discharge outlet at the bottom. The vessel body is fitted with a jacket, and inside the vessel body is a rotating shaft and a temperature sensor 20. One end of the rotating shaft is connected to a motor, and the shaft has a multi-layered, perforated stirring plate with multiple stirring teeth. The temperature sensor 20 is electrically connected to a controller 21. Silica enters the vessel body, and the modifier is added. The heat transfer medium in the jacket provides the temperature required for the modification reaction. The temperature sensor detects the temperature of the material. After the motor starts, it drives the rotating shaft and the multiple stirring plates and stirring teeth to rotate, promoting full contact and reaction between the silica and the modifier, thus achieving the modification of the silica.

[0027] Both the first dispersion component 34 and the third dispersion component 36 include a conical frame 360, on which multiple dispersion blocks 361 are provided, and on which multiple conical bodies 362 are provided. The rotating shaft drives the conical frames, multiple dispersion plates and conical bodies of the first and third dispersion components to stir and mix the materials, promoting full contact and reaction of the materials, and greatly improving the mixing efficiency and reaction efficiency.

[0028] The second dispersing component 35 includes a fixed base 350, on which multiple dispersing rods 351 are mounted. The ends of the dispersing rods 351 are provided with perforated dispersing plates 352, and multiple dispersing bars 353 are mounted on the dispersing rods 351. A rotating shaft drives the fixed base, multiple dispersing rods, dispersing plates, and dispersing bars to rotate, thereby stirring and mixing the surrounding materials, promoting full contact and reaction of the materials, and greatly improving mixing and reaction efficiency.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A base material production system for the preparation of silicone sealant, characterized in that, The apparatus includes a dehydration vessel and a modification reactor. The outlets of the dehydration vessel and the modification reactor are respectively connected to a reaction device. The top and bottom of the reaction device are respectively provided with an inlet and an outlet. The top of the reaction device is provided with a vacuum port, which is connected to a vacuum buffer device. The outside of the reaction device is provided with a first heating element, and the inside of the reaction device is provided with a second heating element and a rotating shaft. One end of the rotating shaft is connected to a motor, and the rotating shaft is provided with a first dispersion element, a second dispersion element, and a third dispersion element.

2. The base material production system for preparing silicone sealant according to claim 1, characterized in that, The dehydration vessel includes a vessel body, with a feed inlet and an vent at the top and a discharge outlet at the bottom. The vent outlet is connected to a vacuum pump. The vessel body is equipped with a jacket on the outside and a rotating shaft and multiple interconnected heating coils inside the vessel body. One end of the rotating shaft is connected to a motor, and multiple stirring rods are provided on the rotating shaft, with multiple stirring bars on each stirring rod.

3. The base material production system for preparing silicone sealant according to claim 1, characterized in that, The modified reaction vessel includes a vessel body, with a feed inlet and a modifier inlet at the top and a discharge outlet at the bottom. The vessel body is equipped with a jacket on the outside and a rotating shaft and a temperature sensor inside. One end of the rotating shaft is connected to a motor, and a multi-layer hollowed-out stirring plate is provided on the rotating shaft, with multiple stirring teeth on the stirring plate. The temperature sensor is electrically connected to a controller.

4. The base material production system for preparing silicone sealant according to claim 1, characterized in that, The vacuum buffer device includes a buffer tank, and the vent of the buffer tank is connected to a vacuum pump.

5. The base material production system for preparing silicone sealant according to claim 1, characterized in that, The first heating element is a jacket disposed outside the reaction device; the second heating element is a plurality of hollow heating plates disposed inside the reaction device, the top of the heating plate being connected to a steam buffer pipe through a steam inlet pipe, the bottom of the heating plate being connected to a condensate buffer pipe through a condensate outlet pipe, and a drain pipe being provided on one side of the lower part of the condensate buffer pipe.

6. The base material production system for preparing silicone sealant according to claim 1, characterized in that, Both the first and third dispersing components include a conical frame, on which a plurality of dispersing blocks are provided, and on which a plurality of conical bodies are provided.

7. The base material production system for preparing silicone sealant according to claim 1, characterized in that, The second dispersing component includes a fixed base, on which a plurality of dispersing rods are provided. The ends of the dispersing rods are provided with dispersing plates with a hollow structure, and the dispersing rods are provided with a plurality of dispersing bars.

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