Room temperature vulcanized silicone rubber-based rubber tube type polymerization device

Abstract

The utility model relates to the technical field of room-temperature vulcanized silicone rubber-based rubber, and particularly discloses a tubular polymerization device for room-temperature vulcanized silicone rubber-based rubber, which aims at solving the problems of low conversion rate and high production cost in the existing industrial production of the room-temperature vulcanized silicone rubber-based rubber, and comprises a reactor group, the reactor group comprises multiple stages of polymerization reactors which are connected in series, and the discharge end of each polymerization reactor is provided with an online viscometer and a rotary discharge valve; in the reactor group, the polymerization reactor at the initial end is provided with a plurality of feeding pipelines, and the top of each polymerization reactor is communicated with a vacuumizing pipe. According to the tubular polymerization device for the room-temperature vulcanized silicone rubber-based rubber disclosed by the utility model, raw materials can be fully converted into room-temperature vulcanized silicone rubber-based rubber products required by production in each stage of equipment through the multi-stage continuous tubular reactors which are communicated through the pipelines.

Description

TECHNICAL FIELD

[0001] The utility model relates to room temperature vulcanized silicone rubber base glue technical field, specifically, relate to a kind of room temperature vulcanized silicone rubber base glue pipe type polymerization device. BACKGROUND

[0002] Room temperature vulcanized silicone rubber, commonly known as 107 glue, is a linear high molecular weight polysiloxane, its structural form is similar to silicone oil, according to the organic group linked on silicon atom, there are dimethyl silicone rubber, methyl vinyl silicone rubber, methylphenyl silicone rubber, fluorosilicone rubber, nitrile silicone rubber, ethyl silicone rubber ethylphenyl silicone rubber and many varieties.

[0003] In industrial production, room temperature vulcanized silicone rubber is mostly prepared by siloxane monomer through polymerization and other reaction processes, specifically, the siloxane monomer and catalyst and other raw materials are put into the reaction kettle, the temperature and reaction in the reaction kettle are regulated, and the reaction time is controlled to realize the precise and efficient production target.

[0004] For example, the patent with publication number CN214390103U provides a kind of high-efficiency continuous room temperature vulcanized silicone rubber automatic production system, including automatic control system, automatic material preparation and dehydration device, automatic reaction device and automatic low molecular removal device, automatic control system and automatic material preparation and dehydration device, automatic reaction device and automatic low molecular removal device each part line connection, wherein automatic reaction device includes polymerization kettle one, polymerization kettle two, polymerization receiving tank one, polymerization receiving tank two, polymerization condenser one, polymerization condenser two, material pump and storage tank, can realize continuous production.

[0005] However, in the existing room temperature vulcanized silicone rubber base glue continuous production system as described above, although multiple polymerization containers are used for separate reaction, and the products are then combined together, it can solve the problem of low efficiency when handling a large amount of material, but there is still a problem of low conversion rate of raw materials, and the program control is complex, the equipment investment and maintenance cost is high. UTILITY MODEL CONTENTS

[0006] The utility model aims at solving the problems of low conversion rate and high production cost in the existing room temperature vulcanized silicone rubber base glue industrial production. The present application provides a kind of room temperature vulcanized silicone rubber base glue pipe type polymerization device, through the multistage continuous pipe type reactor connected by pipeline, the raw materials can be fully converted into the room temperature vulcanized silicone rubber base glue product required for production in each device.

[0007] The utility model realizes the following technical solutions:

[0008] The utility model provides a kind of room temperature vulcanized silicone rubber base rubber tube type polymerization device, including reactor group, the reactor group includes multistage series connection polymerization reactor, and the discharge end of each described polymerization reactor is equipped with on-line viscosity meter and rotary discharge valve;The polymerization reactor is in the gourd shape structure of bottom circle, top thin, and the bottom of the polymerization reactor is material reaction cavity, and the top of the polymerization reactor is gas phase accumulation chamber.

[0009] Preferably, in the reactor group, the polymerization reactor at the initial end is provided with a multi-feed line, and each top of the polymerization reactor is communicated with a vacuum extraction pipe, which is communicated with the top of the polymerization reactor.

[0010] Preferably, the multistage series connection polymerization reactor includes a first-stage tubular reactor, a second-stage tubular reactor and a third-stage tubular reactor connected in series; the first-stage tubular reactor is provided with a first-stage on-line viscosity meter and a first-stage rotary discharge valve near the discharge end of the second-stage tubular reactor; the second-stage tubular reactor is provided with a second-stage on-line viscosity meter and a second-stage rotary discharge valve near the discharge end of the third-stage tubular reactor; and the discharge end of the third-stage tubular reactor is provided with a third-stage on-line viscosity meter and a third-stage rotary discharge valve.

[0011] Preferably, the multi-feed line includes a siloxane feed pipe and a catalyst pipe, and the siloxane feed pipe and the catalyst pipe are both communicated with the feed end of the first-stage tubular reactor.

[0012] Preferably, the feed end of the second-stage tubular reactor is communicated with a degradation agent pipe.

[0013] Preferably, the feed end of the third-stage tubular reactor is communicated with a neutralizing agent pipe.

[0014] Preferably, the discharge end of the third-stage tubular reactor is communicated with a polymer low-content removal tower through a pipeline.

[0015] Preferably, the bottom of each polymerization reactor is communicated with a nitrogen pipe.

[0016] Preferably, the inner bottom of the polymerization reactor is provided with a spiral propelling assembly, which includes a shaft and spiral blades arranged on the side wall surface of the shaft, the shaft is erected in the inner cavity of the polymerization reactor in a horizontal direction, and the shaft is rotationally connected with the inner side wall of the polymerization reactor.

[0017] The technical scheme of the utility model has the following beneficial effects:

[0018] The room temperature vulcanized silicone rubber base rubber pipe type polymerization device of the utility model, through the multistage continuous pipe type reactor of pipeline intercommunication, can make the raw materials fully converted into the room temperature vulcanized silicone rubber base rubber product needed for production in each equipment, and through the joint action of pipe fittings, online instruments, control valves and the like, the degree of automation and continuity of the reaction system is significantly improved, the number of equipment settings is small, the investment is low, the production cost is low, and the operation is continuous and simple, and the polymerization process change can be continuously monitored. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the structure schematic view of the room temperature vulcanized silicone rubber base rubber pipe type polymerization device in embodiment 1.

[0020] Figure 2 It is the structure schematic view of the room temperature vulcanized silicone rubber base rubber pipe type polymerization device in embodiment 1. Figure 1 It is the structure enlarged schematic view of the first stage pipe type reactor area in the room temperature vulcanized silicone rubber base rubber pipe type polymerization device in embodiment 1.

[0021] Figure 3 It is the structure schematic view of the polymerization reactor in embodiment 1.

[0022] The drawing number: 1-first stage pipe type reactor, 11-first stage online viscosity instrument, 12-first stage rotary discharge valve, 13-siloxane feeding pipe, 14-catalyst pipe, 15-nitrogen pipe, 2-second stage pipe type reactor, 21-second stage online viscosity instrument, 22-second stage rotary discharge valve, 23-degradation agent pipe, 3-third stage pipe type reactor, 31-third stage online viscosity instrument, 32-third stage rotary discharge valve, 33-neutralizing agent pipe, 4-polymer low boiling point removal tower, 51-material reaction cavity, 52-gas phase gathering chamber, 53-shaft rod, 54-helical blade, 6-vacuumizing pipe. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme of the utility model will be clearly and completely described below. Among them, the unmarked specific conditions in the embodiment are carried out according to conventional conditions or manufacturer's recommended conditions;The used instruments, equipment or reagent raw materials without manufacturer's note are all conventional products that can be obtained by market purchase. The following is the specific embodiment combined with the drawings.

[0024] As Figures 1 to 3As shown, the embodiment provides a room temperature vulcanized silicone rubber base hose type polymerization device, which comprises a first-stage tubular reactor 1, a second-stage tubular reactor 2 and a third-stage tubular reactor 3 connected in series, a plurality of reactors are connected in series to form a multi-stage reaction, each stage of the reactor is independently controlled and adjusted, and each stage of the reaction parameter is flexibly coordinated through online data; the first-stage tubular reactor 1 is provided with a first-stage online viscosity instrument 11 and a first-stage rotary discharge valve 12 near the discharge end of the second-stage tubular reactor 2; the second-stage tubular reactor 2 is provided with a second-stage online viscosity instrument 21 and a second-stage rotary discharge valve 22 near the discharge end of the third-stage tubular reactor 3; the third-stage tubular reactor 3 is provided with a third-stage online viscosity instrument 31 and a third-stage rotary discharge valve 32, and the whole polymerization process is continuously monitored and controlled through the online viscosity instrument.

[0025] Each of the above-mentioned first-stage tubular reactors 1 is a gourd-shaped structure, which can make the water vapor generated in the reaction gather in the upper pipeline and then be taken out of the reactor. Specifically, the reactor has a gourd-shaped structure with a round bottom and a thin top, and the bottom of the polymerization reactor is a material reaction cavity 51, and the top of the polymerization reactor is a gas phase gathering chamber 52. The raw materials are polymerized in the lower pipeline of the reactor, the nitrogen gas introduced during the reaction and the water vapor generated in the reaction are gathered in the upper pipeline of the reactor, and are taken out by vacuum to balance the internal pressure of the reactor and increase the viscosity of the polymer; the top of each polymerization reactor is communicated with a vacuum suction pipe 6, and the vacuum suction pipe 6 is communicated with the top of the polymerization reactor. The inner bottom of the polymerization reactor is provided with a spiral propelling assembly, which comprises a shaft 53 and a spiral blade 54 arranged on the side wall of the shaft 53. The shaft 53 is arranged in the horizontal direction in the inner cavity of the polymerization reactor, and the shaft 53 is rotationally connected with the inner side wall of the polymerization reactor. During use, as the viscosity of the polymer increases, the flowability becomes poor. The high-viscosity polymer can be fully mixed by the spiral propelling mode, and the power for advancing is given to continuously and stably take out the material from the reactor, so as to avoid the accumulation of the material to hinder the taking out of the reaction gas phase material.

[0026] In the embodiment, the reactor group is also provided with a plurality of feeding pipelines, specifically, the plurality of feeding pipelines comprise a siloxane feeding pipe 13 and a catalyst pipe 14, and the siloxane feeding pipe 13 and the catalyst pipe 14 are communicated with the feeding end of the first-stage tubular reactor 1. During use, the polymerization raw materials preheated to the reaction temperature are delivered into the first-stage tubular reactor 1, and the catalyst is uniformly added according to the formula proportion. Under the stirring and mixing action of the spiral propeller and the bottom nitrogen gas, the raw materials and the catalyst are fully contacted and start to polymerize.

[0027] The feed end of the secondary tubular reactor 2 is communicated with a degrading agent pipe 23, and the material in the reactor continuously polymerizes and the viscosity rises during the forward pushing process, and is stably transported to the secondary tubular reactor 2 by the primary rotary discharge valve 12 for continuous polymerization, and the degrading agent is uniformly added according to the formula proportion, and the polymer viscosity and molecular weight distribution tend to be stable under the stirring mixing action of the screw propeller and the nitrogen gas at the bottom.

[0028] The feed end of the tertiary tubular reactor 3 is communicated with a neutralizing agent pipe 33, and the polymer material with stable quality enters the tertiary tubular reactor 3 under the action of the screw propeller and the rotary discharge valve for catalyst neutralization reaction, and the neutralizing agent is uniformly added according to the formula proportion, and the material stops polymerization after the catalyst is neutralized, and is stably and continuously transported to the low-removing process under the action of the screw propeller and the rotary discharge valve, so as to obtain the room temperature vulcanized silicone rubber base glue product. The person skilled in the art can also increase or decrease the number of reactors or adjust the series or parallel connection mode between the multi-stage reactors according to different production specifications of different room temperature vulcanized silicone rubber bases, so as to adapt to specific production needs.

[0029] The bottom of each polymerization reactor is communicated with a nitrogen pipe 15, and the bottom nitrogen is used to strengthen the mixing of the material in the reactor and to take away the water generated in the reaction, so that the viscosity of the polymer can be stably and controllably increased.

[0030] In the embodiment, the discharge end of the tertiary tubular reactor 3 is communicated with a polymer low-removing tower 4 through a pipeline, and the prepared polymer product is sent to the polymer low-removing tower 4 for treatment to remove low-boiling impurity components in the product.

[0031] The room temperature vulcanized silicone rubber base tubular polymerization device can make the raw materials be fully converted into the room temperature vulcanized silicone rubber base product required by production in the multi-stage continuous tubular reactors communicated through pipelines, and through the joint action of the pipe fittings, online instruments and control valves, the degree of automation and continuity of the reaction system is significantly improved, the number of equipment settings is small, the investment is low, the production cost is low, the operation is continuous and simple, and the polymerization process changes can be continuously monitored.

[0032] The above is only a preferred embodiment of the utility model, and is not used for limiting the utility model. For the person skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A room temperature vulcanizing silicone rubber based tube type polymerization apparatus characterized by comprising: The reactor group comprises a plurality of polymerization reactors connected in series, and each of the polymerization reactors is provided with an online viscosity meter and a rotary discharge valve at the discharge end thereof; The polymerization reactor has a bottom circular and top narrow gourd shape structure, and the bottom of the polymerization reactor is a material reaction cavity (51), and the top of the polymerization reactor is a gas phase gathering chamber (52).

2. The room temperature vulcanizing silicone rubber based tube type polymerization apparatus according to claim 1, characterized by In the reactor group, the polymerization reactor at the initial end is provided with a plurality of feeding pipelines, and each of the polymerization reactors is communicated with a vacuumizing pipe (6) at the top thereof, and the vacuumizing pipe (6) is communicated with the top of the polymerization reactor.

3. The room temperature vulcanizing silicone rubber based tube type polymerization apparatus according to claim 2, characterized by The plurality of polymerization reactors connected in series comprises a first-stage tubular reactor (1), a second-stage tubular reactor (2) and a third-stage tubular reactor (3) connected in series. The first-stage tubular reactor (1) is provided with a first-stage online viscosity meter (11) and a first-stage rotary discharge valve (12) near the discharge end of the second-stage tubular reactor (2). The second-stage tubular reactor (2) is provided with a second-stage online viscosity meter (21) and a second-stage rotary discharge valve (22) near the discharge end of the third-stage tubular reactor (3). The third-stage tubular reactor (3) is provided with a third-stage online viscosity meter (31) and a third-stage rotary discharge valve (32) at the discharge end thereof.

4. The room temperature vulcanizing silicone rubber based tube type polymerization apparatus according to claim 3, wherein The plurality of feeding pipelines comprises a siloxane feeding pipe (13) and a catalyst pipe (14), and the siloxane feeding pipe (13) and the catalyst pipe (14) are communicated with the feeding end of the first-stage tubular reactor (1).

5. The room temperature vulcanizing silicone rubber based tube type polymerization apparatus according to claim 3, wherein The feeding end of the second-stage tubular reactor (2) is communicated with a degrading agent pipe (23).

6. The room temperature vulcanizing silicone rubber based tube type polymerization apparatus according to claim 3, wherein The feeding end of the third-stage tubular reactor (3) is communicated with a neutralizing agent pipe (33).

7. The room temperature vulcanizing silicone rubber based tube type polymerization apparatus according to claim 3, wherein The discharge end of the third-stage tubular reactor (3) is communicated with a polymer low-boiling component removal tower (4) through a pipeline.

8. The room temperature vulcanizing silicone rubber based tube type polymerization apparatus according to claim 1, wherein The bottom of each of the polymerization reactors is communicated with a nitrogen pipe (15).

9. The room temperature vulcanizing silicone rubber based tube type polymerization apparatus according to claim 1, wherein The inner bottom of the polymerization reactor is provided with a screw propelling assembly, the screw propelling assembly comprises a shaft (53) and screw blades (54) arranged on the side wall of the shaft (53), the shaft (53) is arranged in the horizontal direction in the inner cavity of the polymerization reactor, and the shaft (53) is rotationally connected with the inner side wall of the polymerization reactor.

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